Tad Malpass v. Department of Treasury , 494 Mich. 237 ( 2013 )


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  •                                                                                        Michigan Supreme Court
    Lansing, Michigan
    Chief Justice:         Justices:
    Syllabus                                                        Robert P. Young, Jr.   Michael F. Cavanagh
    Stephen J. Markman
    Mary Beth Kelly
    Brian K. Zahra
    Bridget M. McCormack
    David F. Viviano
    This syllabus constitutes no part of the opinion of the Court but has been             Reporter of Decisions:
    prepared by the Reporter of Decisions for the convenience of the reader.               Corbin R. Davis
    MALPASS v DEPARTMENT OF TREASURY
    WHEELER ESTATE v DEPARTMENT OF TREASURY
    HUZELLA v DEPARTMENT OF TREASURY
    WRIGHT v DEPARTMENT OF TREASURY
    WHEELER v DEPARTMENT OF TREASURY
    Docket Nos. 144430, 144431, 144432, 145367, 145368, 145369, 145370. Argued March 5,
    2013 (Calendar Nos. 1, 6). Decided June 24, 2013.
    Tad and Brenda L. Malpass (Docket No. 144430), Tracy and Brenda K. Malpass (Docket
    No. 144431), and Fred and Barbara Malpass (Docket No. 144432) brought separate actions in
    the Court of Claims, seeking a reversal of the Department of Treasury’s decision to deny the
    Malpasses’ amended individual income tax returns for the years 2001, 2002, and 2003. The
    Malpasses owned East Jordan Iron Works, a Michigan corporation that operated an iron foundry
    in East Jordan, Michigan; they also owned Ardmore Foundry, Inc., a Michigan corporation that
    operated an iron foundry located in Ardmore, Oklahoma. Both companies were classified as S-
    corporations under the Internal Revenue Code. For the specified years, the Malpasses treated the
    companies as separate, non-unitary entities for taxation purposes, which resulted in income from
    East Jordan being attributed to Michigan and Ardmore’s losses being attributed to Oklahoma.
    The Malpasses later filed amended returns for those tax years and requested refunds totaling
    more than $1 million, claiming that they could combine East Jordan and Ardmore’s profits and
    losses because they were a unitary business. The department denied the Malpasses’ amended
    returns. The court, Rosemarie E. Aquilina, J., granted the Malpasses’ motion for summary
    disposition, finding that East Jordan and Ardmore were a unitary business, that the unitary
    business principle applied to the Income Tax Act, MCL 206.1 et seq. (ITA), and that the
    Malpasses could combine the income and losses of East Jordan and Ardmore and then apportion
    the aggregate. The Court of Appeals, SHAPIRO, P.J., SAAD and BECKERING, JJ., reversed, finding
    that East Jordan and Ardmore were separate business entities and that the ITA did not allow
    individual taxpayers to combine their business income from separate business entities and then
    apportion on the basis of the combined apportionment factors of the entities. 
    295 Mich App 263
    (2012). The Supreme Court granted the Malpasses’ application for leave to appeal. 
    493 Mich 864
     (2012).
    The Wheeler estate (Docket No. 145367), Nicholas and Lisa J. Huzella (Docket No.
    145368), Patrick and Michaelon Wright (Docket No. 145369), and Thomas R. and Patsy
    Wheeler (Docket No. 145370) (collectively, the taxpayers) filed petitions in the Tax Tribunal,
    challenging the assessment of taxes for the tax years 1994 and 1995. Members of the Wheeler
    family were shareholders of Electro-Wire Products, Inc., a Michigan-based S-corporation.
    Electro-Wire acquired the assets of Temic Telefunken Kabelsatz, GmbH, which resulted in two
    general partnerships: Temic Telefunken Kabelsatz (TKG), the operating partnership, and
    Electro-Wire Products, GmbH (EWG), the holding partnership. The acquisition resulted in one
    S-corporation (Electro-Wire) and two general partnerships (TKG and EWG), with all the income
    and losses passing through to the owners as individual income. The taxpayers reported the
    income by treating the businesses as unitary and apportioned the income using the combined
    apportionment factors of both Electro-Wire and TKG. Following an audit, the department
    asserted that the unitary business principle did not apply to individuals and that the taxpayers
    were required to apply Electro-Wire’s apportionment factors to its income alone, resulting in
    liabilities and interest totaling more than $2 million. The tribunal granted the taxpayers’ motion
    for summary disposition, determining that under the ITA, the unitary business principle applied
    to individuals as well as to separate corporate entities. The Court of Appeals, HOEKSTRA, P.J.,
    and SAWYER and SAAD, JJ., affirmed, concluding that Electro-Wire and TKG were a unitary
    business, the taxpayers could use combined reporting under the ITA, and that the apportionment
    could include income from business activity that was unitary with its Michigan business, Electro-
    Wire. 
    297 Mich App 411
     (2012). The Supreme Court granted the Department of Treasury’s
    application for leave to appeal. 
    493 Mich App 865
     (2012).
    In a unanimous opinion by Justice VIVIANO, the Supreme Court held:
    Under the ITA, individual taxpayers may combine the profits and losses from unitary
    flow-through businesses and then apportion that income on the basis of those businesses’
    combined apportionment factors. For the 1994 and 1995 tax years, the apportionment could
    properly be applied to a foreign entity if the foreign entity and the individual taxpayer’s in-state
    business were unitary.
    1. The unitary business principle provides that a state may tax multistate businesses on
    an apportionable share of the multistate business conducted in the taxing state. The following
    factors are appropriate guides for determining whether business operations are unitary: (1)
    economic realities; (2) functional integration; (3) centralized management; (4) economies of
    scale; and (5) substantial mutual interdependence. Individual taxpayers in Michigan may use
    either a separate-entity reporting method to apportion income, or a combined reporting method.
    Separate-entity reporting requires each entity with a nexus to the taxing state to be considered as
    a separate and distinct entity, regardless of whether it could comprise a unitary business with
    other entities. Combined reporting requires each member of a unitary business to compute its
    individual taxable income attributable to activities in the state by taking a portion of the
    combined net income of the group through the utilization of combined apportionment factors. In
    Malpass, the parties did not dispute that East Jordan and Ardmore were unitary. In Wheeler,
    considering the totality of the circumstances, the tribunal’s finding that Electro-Wire and TKG
    were a unitary business was supported by competent, material, and substantial evidence on the
    whole record, and the Court of Appeals properly affirmed that conclusion.
    2. MCL 206.4(2), 206.102, 206.103, and 206.110(1) clearly require an individual
    taxpayer with business income stemming from business activity both within and outside of the
    state to allocate and apportion all business income using the formula set forth in MCL 206.115.
    Section 115 provides for the application of formulary apportionment, but does not expressly
    require that a particular method of apportionment be used. Rather, the MCL 206.115 language is
    broad enough to allow both the separate-entity reporting and combined reporting method of
    formulary apportionment. Although the department has required individuals to use separate-
    entity reporting for flow-through business income in the past, it has not promulgated such a rule
    and the Supreme Court declined to adopt the department’s preferred methodology; the ITA
    permits combined reporting because it satisfies the clear mandate of MCL 206.115 that all
    business income be apportioned to the state.
    3. Taken together, MCL 206.103, 206.105, and MCL 206.20 require unitary businesses
    that include foreign entities to allocate and apportion their income as provided by the ITA. For
    the tax years 1994 and 1995, the version of MCL 206.115 in effect at that time stated in part that
    all business income shall be apportioned to Michigan; the language of the statute did not limit
    formulary apportionment to the domestic entities of a unitary business. Accordingly, for the
    1994 and 1995 tax years, under MCL 206.115 an individual may use combined reporting for
    income derived from a foreign entity that is unitary with a domestic business taxable in
    Michigan. In Malpass, the Court of Appeals erred by concluding that the ITA did not allow the
    Malpasses to first combine the income from their unitary flow-through entities and then
    apportion it on the basis of the combined apportionment factors of East Jordan and Ardmore. In
    Wheeler, the Court of Appeals properly affirmed the tribunal’s conclusion that the ITA contained
    no geographical limitation for the 1994 and 1995 tax years; combined reporting was proper even
    though the unitary business of Electro-Wire and TKG included an entity located in a foreign
    country.
    Malpass reversed and remanded to the Court of Claims for reinstatement of the order
    granting summary disposition in favor of the Malpasses.
    Wheeler affirmed, but part III(A) of the Court of Appeals’ opinion vacated because it
    relied on Malpass, which was reversed by this decision.
    ©2013 State of Michigan
    Michigan Supreme Court
    Lansing, Michigan
    Chief Justice:          Justices:
    Opinion                                    Robert P. Young, Jr. Michael F. Cavanagh
    Stephen J. Markman
    Mary Beth Kelly
    Brian K. Zahra
    Bridget M. McCormack
    David F. Viviano
    FILED JUNE 24, 2013
    STATE OF MICHIGAN
    SUPREME COURT
    TAD MALPASS and BRENDA L.
    MALPASS,
    Plaintiffs-Appellants,
    v                                                  No. 144430
    DEPARTMENT OF TREASURY,
    Defendant-Appellee.
    TRACY MALPASS AND BRENDA K.
    MALPASS,
    Plaintiffs-Appellants,
    v                                                  No. 144431
    DEPARTMENT OF TREASURY,
    Defendant-Appellee.
    FRED MALPASS and BARBARA
    MALPASS,
    Plaintiffs-Appellants,
    v                                      No. 144432
    DEPARTMENT OF TREASURY,
    Defendant-Appellee.
    WHEELER ESTATE,
    Petitioner-Appellee,
    v                                      No. 145367
    DEPARTMENT OF TREASURY,
    Respondent-Appellant.
    NICHOLAS HUZELLA and LISA J.
    HUZELLA,
    Petitioners-Appellees,
    v                                      No. 145368
    DEPARTMENT OF TREASURY,
    Respondent-Appellant.
    PATRICK WRIGHT and MICHAELON
    WRIGHT,
    Petitioners-Appellees,
    v                                      No. 145369
    DEPARTMENT OF TREASURY,
    Respondent-Appellant.
    2
    THOMAS R. WHEELER and PATSY
    WHEELER,
    Petitioners-Appellees,
    v                                                          No. 145370
    DEPARTMENT OF TREASURY,
    Respondent-Appellant.
    BEFORE THE ENTIRE BENCH
    VIVIANO, J.
    In these consolidated cases, we address the application of Michigan’s statutory
    apportionment formula for individuals with flow-through business income under the
    Michigan Income Tax Act (ITA).1 In both cases, the individual taxpayers received
    income from in-state and out-of-state, flow-through businesses.          The Michigan
    Department of Treasury (Department) refused the taxpayers’ attempts to combine the
    flow-through income from their respective businesses and then apportion the income
    using the businesses’ combined apportionment factors, and instead required the income
    of each entity to be apportioned separately.
    We hold that the ITA does not prohibit individual taxpayers from combining the
    profits and losses from unitary flow-through businesses and then apportioning that
    1
    MCL 206.1 et seq. The statutory provisions at issue in this opinion are to the versions
    of the ITA applicable to the tax years at issue. The Legislature has since amended many
    of these provisions. Except as discussed herein, those amendments have no bearing on
    these cases.
    3
    income on the basis of the businesses’ combined apportionment factors. Moreover, we
    hold that the ITA did not limit apportionment of income to domestic businesses during
    the 1994 and 1995 tax years, and that the apportionment could properly be applied to a
    foreign entity to the extent that the foreign entity and the individual taxpayer’s in-state
    business were unitary.
    Accordingly, (1) we reverse the Court of Appeals’ judgment in Malpass and
    reinstate the order entered by the Court of Claims granting summary disposition in favor
    of the Malpasses, and (2) we affirm the Court of Appeals’ judgment in favor of the
    Wheelers.
    I. FACTS AND PROCEDURAL HISTORY
    A. MALPASS v DEPARTMENT OF TREASURY
    Plaintiffs, individual members of the Malpass family, owned and operated East
    Jordan Iron Works (East Jordan), an iron foundry in East Jordan, Michigan. They also
    owned and operated Ardmore Foundry, Inc. (Ardmore), an iron foundry in Ardmore,
    Oklahoma.      Both were Michigan corporations.         Because of their S-corporation
    classification under the Internal Revenue Code,2 all profits and losses flowed through the
    corporation to the family members individually.
    For the tax years of 2001, 2002, and 2003, East Jordan operated at a profit and
    Ardmore operated at a loss. In their initial returns, the Malpasses treated the companies
    as separate, non-unitary entities. Accordingly, the Malpasses attributed East Jordan’s
    income to Michigan and Ardmore’s losses to Oklahoma. The Malpasses then amended
    2
    
    26 USC § 1361
    .
    4
    their returns for the 2001, 2002, and 2003 tax years, treating East Jordan and Ardmore as
    a unitary business, and combining East Jordan’s profits with Ardmore’s losses. The
    combined amount from the unitary business was then apportioned to Michigan on the
    basis of the Michigan apportionment factors, resulting in claims for refunds totaling over
    $1 million.
    After the Department rejected the Malpasses’ amended returns, the individual
    taxpayers brought actions in the Court of Claims. The actions were consolidated, and on
    November 19, 2009, the Court of Claims granted summary disposition in favor of
    plaintiffs. The Court of Claims determined that East Jordan and Ardmore were a unitary
    business on the basis of an undisputed affidavit. It then concluded that the unitary
    business principle applied to the ITA and that the Malpasses could first combine the
    income and losses of East Jordan and Ardmore and then apportion the aggregate.
    In a published opinion, the Court of Appeals reversed, concluding that East Jordan
    and Ardmore were separate and legally distinct business entities and that the ITA did not
    allow for combined reporting of separate entities.3 The Court of Appeals concluded that
    the Malpasses had received income from two separate businesses and were required to
    apportion the income of each entity separately.4
    B. WHEELER v DEPARTMENT OF TREASURY
    Members of the Wheeler family were shareholders of Electro-Wire Products, Inc.
    (Electro-Wire), a Michigan-based S-corporation that made electrical systems. Electro-
    3
    Malpass v Dep’t of Treasury, 
    295 Mich App 263
    , 275; 815 NW2d 804 (2011).
    4
    
    Id.
    5
    Wire acquired the assets of Temic Telefunken Kabelsatz, GmbH, a German company.
    The asset purchase resulted in two general partnerships: Temic Telefunken Kabelsatz,
    GmbH (TKG), the operating partnership, and Electro-Wire Products, GmbH (EWG), the
    holding partnership. The end result of the acquisition was one S-corporation (Electro-
    Wire) and two general partnerships (TKG and EWG), with all the income and losses
    passing through to the owners as individual income.
    For the tax years 1994 and 1995, the Wheelers reported the pass-through Electro-
    Wire income on their individual tax returns; the income included partnership income
    from TKG. The Wheelers treated the businesses as unitary and then apportioned the
    income using the combined apportionment factors of both companies. After an audit and
    a determination that the unitary business principle did not apply to individual taxpayers,
    the Department required the Wheelers to apportion the income stemming from Electro-
    Wire on the basis of Electro-Wire’s apportionment factors and to disregard TKG’s
    factors, resulting in liabilities and interest totaling over $2 million.
    The Tax Tribunal granted summary disposition in favor of the Wheelers, finding
    that there was no language in the ITA that supported the Department’s assertion that the
    unitary business principle applied only on a separate-legal-entity level. In a published
    opinion, the Court of Appeals affirmed, concluding that the Wheelers could use
    combined reporting under the ITA and that the apportionment could extend to foreign-
    6
    business activity that was unitary with its Michigan business.5 The Court of Appeals also
    concluded that Electro-Wire and TKG were a unitary business.6
    II. STANDARD OF REVIEW
    In Malpass, we review de novo the trial court’s decision on a motion for summary
    disposition.7 Our review of the Tax Tribunal’s decision in Wheeler is limited. In the
    absence of fraud, we review a Tax Tribunal decision for “misapplication of the law or
    adoption of a wrong principle.”8       We consider the Tax Tribunal’s factual findings
    conclusive if they are “supported by competent, material, and substantial evidence on the
    whole record.”9 However, we review issues of statutory interpretation de novo.10
    III. ANALYSIS
    A. FORMULARY APPORTIONMENT IN MICHIGAN
    The Due Process Clause of the Fourteenth Amendment imposes two requirements
    on a state’s taxation of a business operating in interstate commerce: “a ‘minimal
    connection’ between the interstate activities and the taxing State, and a rational
    5
    Wheeler v Dep’t of Treasury, 
    297 Mich App 411
    , 420, 422; 825 NW2d 588 (2012).
    6
    Id. at 425.
    7
    Debano-Griffin v Lake Co, 
    493 Mich 167
    , 175; 828 NW2d 644 (2013).
    8
    Briggs Tax Serv, LLC v Detroit Pub Sch, 
    485 Mich 69
    , 75; 780 NW2d 753 (2010).
    9
    Klooster v City of Charlevoix, 
    488 Mich 289
    , 295; 795 NW2d 578 (2011), quoting Mich
    Bell Tel Co v Dep’t of Treasury, 
    445 Mich 470
    , 476; 518 NW2d 808 (1994) (quotation
    marks omitted).
    10
    Klooster, 488 Mich at 295.
    7
    relationship between the income attributed to the State and the intrastate values of the
    enterprise.”11 A state is not required to isolate a business’s intrastate activities from its
    interstate activities; instead, “it may tax an apportioned sum of the corporation’s
    multistate business if the business is unitary.”12 This latter concept, known as the unitary
    business principle, has been referred to as the “linchpin of apportionability.”13 It allows a
    state to “tax multistate businesses ‘on an apportionable share of the multistate business
    carried on in part in the taxing state.’”14
    11
    Mobil Oil Corp v Comm’r of Taxes of Vermont, 
    445 US 425
    , 436-437; 
    100 S Ct 1223
    ;
    
    63 L Ed 2d 510
     (1980), citing Moorman Mfg Co v Bair, 
    437 US 267
    , 272-273; 
    98 S Ct 2340
    ; 
    57 L Ed 2d 197
     (1978).
    12
    Allied-Signal, Inc v Director, Div of Taxation, 
    504 US 768
    , 772; 
    112 S Ct 2251
    ; 
    119 L Ed 2d 533
     (1992).
    13
    Mobil Oil, 
    445 US at 438-439
    . Typically, controversies involving the unitary business
    principle and formulary apportionment feature the taxpayer raising constitutional
    objections to the state’s taxation scheme. See Mobil Oil Corp, 
    445 US at 439
    ; Container
    Corp of America v Franchise Tax Board, 
    463 US 159
    , 165-175; 
    103 S Ct 2933
    ; 
    77 L Ed 2d 545
     (1983); F W Woolworth Co v Taxation & Revenue Dep’t of New Mexico, 
    458 US 354
    , 364-372; 
    102 S Ct 3128
    ; 
    73 L Ed 2d 819
     (1982); ASARCO Inc v Idaho State Tax
    Comm, 
    458 US 307
    , 322-330; 
    102 S Ct 3103
    ; 
    73 L Ed 2d 787
     (1982). Although there are
    no constitutional claims in this case, that does not render the basic constitutional
    principles underlying Michigan’s formulary apportionment scheme irrelevant because the
    unitary business principle is the predicate for any formulary apportionment scheme.
    14
    Preston v Dep’t of Treasury, 
    292 Mich App 728
    , 733; 815 NW2d 781 (2011), quoting
    Allied-Signal, Inc, 
    504 US at 778
    . Until recently, the Department has taken the position
    that the unitary business principle does not apply to individual taxpayers, but now
    concedes that it does. Michigan adopted the Uniform Division of Income for Tax
    Purposes Act (UDITPA) when it enacted the Michigan Income Tax Act in 1967;
    UDITPA embodies the application of the formulary apportionment method in
    conjunction with the unitary business principle. See Container Corp, 
    463 US at 165, 170
    .
    8
    Our state has adopted formulary apportionment for individual taxpayers in the
    ITA.15 Recognizing that Michigan is a formulary apportionment state, however, does not
    resolve the issue in this case because there are at least two different methods of applying
    the apportionment formula.16 First, a state may use separate-entity reporting, which
    requires each entity with a nexus to the taxing state to be considered as a separate and
    distinct entity, regardless of whether it could comprise a unitary business with other
    entities.17   Alternatively, a state may use combined reporting, which requires “each
    member of a group carrying on a unitary business [to] compute[] its individual taxable
    income attributable to activities in [the state] by taking a portion of the combined net
    income of the group through the utilization of combined apportionment factors.”18 The
    question in this case is whether the ITA prohibits individual taxpayers from using
    combined reporting.
    15
    MCL 206.115. During the tax years at issue in these cases, Michigan used three
    factors—payroll, property, and sales—to apportion in-state and out-of-state business
    income for individuals. Michigan’s apportionment formula changed as of January 1,
    2012, with the enactment of Michigan’s corporate income tax act, MCL 206.601 et seq.
    Michigan now apportions solely on a sales factor. See MCL 206.115(2), as amended by
    
    2011 PA 38
     and 
    2011 PA 178
    .
    16
    See, generally, 2 Pomp, State and Local Taxation (6th ed), pp 10:43-10:48.
    17
    Media Gen Communications v SC Dep’t of Revenue, 388 SC 138, 142, 146; 
    694 SE 2d 525
     (2010); see also Pomp, pp 10:42, 10:43.
    18
    Media Gen Communications, 388 SC at 142. The combined income is not used for
    taxing purposes, but it is used to determine the “portion of income from the entire unitary
    business attributable to sources within [the state] that is derived by members of the group
    subject to [the state’s] taxing jurisdiction.” 
    Id.
     See also Pomp, pp 10:42-10:43.
    9
    To answer this question, we turn first to the statutory language.19 Our goal in
    interpreting a statute “is to give effect to the Legislature’s intent, focusing first on the
    statute’s plain language.”20 In so doing, we examine the statute as a whole, reading
    individual words and phrases in the context of the entire legislative scheme.21
    Under the ITA, an individual taxpayer’s entire income is taxable in Michigan if it
    is derived solely from activity within the state.22 However, if the income is derived from
    business activity taxable both within and without this state, the ITA requires an individual
    taxpayer to “allocate and apportion his net income . . . .”23 The ITA further states that,
    “[f]or a resident individual, . . . all taxable income from any source whatsoever, except
    that attributable to another state under [MCL 206.111 to MCL 206.115] and subject to
    [MCL 206.255], is allocated to this state.”24 Section 115, the only one of these sections
    applicable here, provides: “All business income, other than income from transportation
    services shall be apportioned to this state by multiplying the income by a fraction, the
    numerator of which is the property factor plus the payroll factor plus the sales factor, and
    19
    Casco Twp v Secretary of State, 
    472 Mich 566
    , 571; 701 NW2d 102 (2005).
    20
    Klooster, 488 Mich at 296, citing Sun Valley Foods Co v Ward, 
    460 Mich 230
    , 236;
    596 NW2d 119 (1999).
    21
    Sun Valley Foods Co, 
    460 Mich at 237
    ; Herman v Berrien Co, 
    481 Mich 352
    , 366; 750
    NW2d 570 (2008).
    22
    MCL 206.102.
    23
    MCL 206.103.
    24
    MCL 206.110(1).
    10
    the denominator which is 3.”25 The ITA defines “business income” as “income arising
    from transactions, activities, and sources in the regular course of the taxpayer’s trade or
    business . . . .”26
    These provisions require an individual taxpayer with business income stemming
    from business activity both within and outside of the state to allocate and apportion “[a]ll
    business income” using the formula contained in MCL 206.115.               Section 115 is
    unambiguous—it plainly provides for the application of formulary apportionment.
    However, the statute does not require that any particular method of apportionment be
    used—it is silent on this question.       When, as here, “the language of the statute is
    unambiguous, the Legislature must have intended the meaning clearly expressed, and the
    statute must be enforced as written. No further judicial construction is required or
    permitted.”27 Although section 115 does not require or prohibit any particular method of
    applying the statutory formula, the phrase, “[a]ll business income . . . shall be
    apportioned[,]” is certainly broad enough to encompass either of the approaches
    advocated by the parties.
    The Department argues that combined reporting is prohibited because it is not
    expressly authorized in the ITA for individual taxpayers, like it is for corporate
    taxpayers.28 However, the Department’s argument is flawed. The argument is self-
    25
    Emphasis added.
    26
    MCL 206.4(2).
    27
    Sun Valley Foods, 
    460 Mich at 236
    .
    28
    MCL 208.77. During the tax years at issue, a combined return provision existed in the
    Single Business Tax Act, MCL 208.1 et seq., as replaced by 
    2006 PA 325
    , giving the
    11
    defeating because the ITA does not expressly authorize either method of reporting.
    Moreover, the provision of the corporate tax law applicable at the time of these returns,
    MCL 208.77(1), allowed for combined or consolidated returns by multiple corporate
    entities engaged in affiliated business that would otherwise be required to file separate
    returns. This is because Michigan imposes corporate taxes at the entity level; thus, absent
    a combined filing provision, unitary corporations would lack a means to file a single
    combined return. By contrast, income for individuals is already disbursed from the
    income-producing entities, aggregated by the taxpayer at the time of filing, and included
    on a single return. Thus, while the Legislature has included a combined return provision
    in the corporate tax code, such a provision is unnecessary for individual taxpayers,
    because they are already required to aggregate all their income on a single return.29
    The Department also argues that it has always required the use of separate-entity
    reporting and has never approved combined reporting. Although the Department has
    certain rule-making authority, in this case, the Department has not promulgated a rule
    requiring separate-entity reporting for individual taxpayers.30 To the extent that the
    Department discretion to allow a corporation to file a consolidated or combined return.
    29
    See MCL 206.315.
    30
    The Department is free to promulgate administrative rules consistent with the ITA in
    accordance with procedures set forth in the Administrative Procedure Act, MCL 24.201
    et seq. and MCL 205.3(b); see also MCL 206.471(1)(b) (providing that the Department
    may promulgate rules for “[t]he computation of the [income] tax”); MCL 206.471(1)(d)
    (providing that the Department may promulgate rules regarding the “ascertainment,
    assessment, and collection of the tax”). We do not address whether, or the extent to
    which, the Department may promulgate a rule requiring that an individual taxpayer use a
    particular method of reporting in the taxpayer’s initial filing. We note, however, that any
    such rule would be subject to the current MCL 206.195, which gives the taxpayer the
    12
    Department has interpreted the statute to prohibit combined reporting, that interpretation
    is inconsistent with the broad scope of section 115; therefore, it “‘conflict[s] with the
    indicated spirit and purpose of the legislature.’”31
    Faced with a statutory provision that is broad enough to encompass both reporting
    options—but does not choose between them—the Department asks this Court to adopt its
    preferred methodology. However, we decline this invitation to engage in interstitial rule
    making because “[t]o supply omissions transcends the judicial function.”32 Instead, in the
    absence of a policy choice by the Legislature, we conclude that the ITA permits either
    reporting method.33
    In sum, we reject the Department’s position that the ITA requires separate-entity
    reporting. Instead, we hold that combined reporting is permitted by the ITA because it
    right to petition for an alternative method if the initial filing required by the Department
    “do[es] not fairly represent the extent of the taxpayer’s business activity in this state.”
    MCL 206.195(1)(c).
    31
    In re Complaint of Rovas Against SBC Mich, 
    482 Mich 90
    , 103; 754 NW2d 259
    (2008), quoting Boyer-Campbell Co v Fry, 
    271 Mich 282
    , 296-297; 
    260 NW 165
     (1935).
    32
    Iselin v United States, 
    270 US 245
    , 251; 
    46 S Ct 248
    ; 
    70 L Ed 566
     (1926).
    33
    Although not significant to the Court’s analysis, we note that combined reporting
    ensures that “the substance of the business activities in the state [] control tax
    consequences, not the organizational structure of the business or the entities conducting
    those activities,” Pomp, p 10-48; is “wholly consistent with, and a natural extension of,
    the apportionment method[,]” Coca Cola Co v Dep’t of Revenue, 
    271 Or 517
    , 528; 533
    P2d 788 (1975); and, perhaps for these reasons, is a “growing trend[.]” Pomp, p 10-44.
    However, the separate-entity approach is also consistent with formulary apportionment.
    See W. Hellerstein, Income Allocation, 12 Int’l Transfer Pricing J. 103, 105 (2005).
    13
    satisfies the clear statutory mandate that “[a]ll business income . . . shall be apportioned
    to this state . . . .”34
    B. THE ITA’S APPLICATION TO FOREIGN ENTITIES
    Beyond our determination that an individual taxpayer can use combined reporting
    for flow-through business income, we also must consider whether this method could
    extend geographically outside the United States during the tax years of 1994 and 1995.
    In Wheeler, the Department argues that even if combined reporting is permitted under the
    ITA, it does not apply to a foreign entity that is unitary with a domestic business taxable
    in Michigan.35 Again, our analysis of this issue begins with the statute’s text.36
    The statutory basis for taxing out-of-state income is § 103, which states:
    Any taxpayer having income from business activity which is taxable
    both within and without this state, other than the rendering of purely
    personal services by an individual, shall allocate and apportion his net
    income as provided in this act.[37]
    MCL 206.105 specifies when a taxpayer’s income is taxable in another state and, thus,
    required to be allocated and apportioned under § 103. It provides:
    For purposes of allocation and apportionment of income from
    business activity under this act, a taxpayer is taxable in another state if (a)
    34
    MCL 206.115.
    35
    We note that the United States Supreme Court has upheld the apportionment of
    business income of unitary foreign entities. See, e.g., Barclays Bank PLC v Franchise
    Tax Bd of Cal, 
    512 US 298
    ; 
    114 S Ct 2268
    ; 
    129 L Ed 2d 244
     (1994); Container Corp of
    America, 
    463 US 159
     (1983).
    36
    Casco Twp, 
    472 Mich at 571
    .
    37
    MCL 206.103 (emphasis added).
    14
    in that state he is subject to a net income tax, a franchise tax measured by
    net income, a franchise tax for the privilege of doing business or a
    corporate stock tax, or (b) that state has jurisdiction to subject the taxpayer
    to a net income tax regardless of whether, in fact, the state does or does
    not.[38]
    Finally, MCL 206.20 defines “state” as “any state of the United States, the District of
    Columbia, the Commonwealth of Puerto Rico, any territory or possession of the United
    States, and any foreign country, or political subdivision, thereof.”39 Taken together,
    these provisions require a taxpayer to allocate and apportion his income if “in [a foreign
    country] he is subject to a net income tax . . . or [a foreign country] has jurisdiction to
    subject the taxpayer to a net income tax . . . .”40 Thus, unitary businesses that include
    foreign entities must allocate and apportion their income as provided by the ITA.41
    We turn now to the ITA provisions dealing with business income to determine if
    the act otherwise excludes the income of a foreign entity for purposes of allocation and
    apportionment. Section 115, which deals with the apportionment of business income,
    states in pertinent part, “All business income . . . shall be apportioned to this state by
    multiplying the income by a fraction, the numerator of which is the property factor plus
    the payroll factor plus the sales factor, and the denominator of which is 3.”42 Moreover,
    the apportionment factors themselves employ universal language when explaining the
    38
    MCL 206.105.
    39
    MCL 206.20 (emphasis added).
    40
    MCL 206.105.
    41
    MCL 206.103.
    42
    Emphasis added.
    15
    scope of relevant business activity. MCL 206.119 states that “[t]he payroll factor is a
    fraction, . . . the denominator of which is the total compensation paid everywhere during
    the tax period.”43 Likewise, MCL 206.121 states that “[t]he sales factor is a fraction, . . .
    the denominator of which is the total sales of the taxpayer everywhere during the tax
    period.”44
    Nowhere in the ITA did the Legislature limit formulary apportionment to the
    domestic entities of a unitary business.      In fact, to the extent that the Legislature
    discussed geographic limitations, it expressly required taxpayers with income taxable in a
    foreign country to allocate and apportion their income as provided in the act, which
    includes § 115’s directive that all business income be apportioned using the
    apportionment factors.45 Therefore, we reject the Department’s argument that the ITA
    prohibits application of formulary apportionment to income from a foreign entity that is
    unitary with a domestic business.
    Accordingly, we conclude that a unitary business with income from a business in a
    foreign country could be apportioned under the version of the ITA in effect during the tax
    years of 1994 and 1995.46
    43
    Emphasis added.
    44
    Emphasis added.
    45
    See MCL 206.20, 206.103, and 206.105.
    46
    The Legislature has limited the scope of the corporate income tax to domestic
    corporations in recent amendments. 
    2011 PA 38
    . The ITA now defines “unitary
    business group” as a “group of United States persons that are corporations, insurance
    companies, or financial institutions, other than a foreign operating entity . . . .” MCL
    206.611(6). The Department argues that this shows that the Legislature only intended to
    include businesses within the United States. However, we are not persuaded that the
    16
    C. APPLICATION TO MALPASS
    On appeal, the parties in Malpass do not dispute whether East Jordan and Ardmore
    were a unitary business. The Court of Appeals, despite determining that the businesses
    had unitary characteristics, wrongly concluded that the ITA does not allow individual
    taxpayers with flow-through business income from separate legal entities to use
    combined reporting.47 For the reasons already stated, we hold that the ITA did not
    prohibit the Malpasses from first combining the income from their unitary flow-through
    entities and then apportioning it on the basis of the combined apportionment factors of
    East Jordan and Ardmore. Therefore, we reverse the Court of Appeals’ judgment in
    Malpass and reinstate the order entered by the Court of Claims granting summary
    disposition in favor of the Malpasses.
    D. APPLICATION TO WHEELER
    Unlike in Malpass, the parties in Wheeler dispute whether the Michigan and
    German entities were a unitary business. The Tax Tribunal found that they were, and the
    Court of Appeals affirmed. To consider business operations unitary, the United States
    recent amendment limiting the scope of corporate income tax should affect our
    interpretation of the ITA for the tax years 1994 and 1995.
    47
    Malpass, 295 Mich App at 270. In its opinion, the Court of Appeals erroneously
    concluded that the ITA does not allow combined reporting. Id. (“[N]othing in the ITA
    allows for combined-entity reporting.”); id. at 272 (“There is no provision in the ITA that
    allows individuals to combine their business income from separate businesses and then
    use a combined apportionment formula on the total.”). However, the Court of Appeals
    reached this conclusion in cursory fashion without analyzing the relevant provisions of
    the ITA. Instead, the Court of Appeals fixated on the corporate form of the business
    entities, even though the ITA makes no distinctions based on corporate formalities.
    17
    Supreme Court has held, “[T]here [must] be some sharing or exchange of value not
    capable of precise identification or measurement—beyond the flow of funds arising out
    of a passive investment or a distinct business operation—which renders formula
    apportionment a reasonable method of taxation.”48 Accordingly, a unitary business exists
    when the income-producing companies have “functional integration, centralization of
    management, and economies of scale.”49 Other United States Supreme Court decisions
    have added to these guideposts.50 The Court of Appeals relied on the following five
    factors in determining whether the Michigan and German entities were a unitary
    business: “(1) economic realities; (2) functional integration; (3) centralized management;
    (4) economies of scale, and (5) substantial mutual interdependence.”51 We agree that
    these factors are appropriate guides for determining whether businesses are unitary.
    Moreover, as the United States Supreme Court held in Container Corp, “We need not
    decide whether any one of these factors would be sufficient as a constitutional matter to
    prove the existence of a unitary business.”52      These factors are not exhaustive or
    48
    Container Corp, 
    463 US at 166
    .
    49
    Mobil Oil, 
    445 US at 438
    .
    50
    See F W Woolworth Co, 458 US at 364-372; ASARCO Inc, 
    458 US at 319, 322-329
    ;
    Container Corp, 
    463 US 159
    .
    51
    Wheeler Estate, 297 Mich App at 422-423, citing Holloway Sand & Gravel, Co, Inc v
    Dep’t of Treasury, 
    152 Mich App 823
    , 831; 393 NW2d 921 (1986).
    52
    Container Corp, 
    463 US at 179-180
    .
    18
    exclusive. Nor is any one factor dispositive. Instead, a court should consider the totality
    of the circumstances when determining if businesses are unitary.53
    Turning to the evidence offered by the parties, and aware of our limited review of
    the factual determinations made by the Tax Tribunal, we agree with that body’s
    conclusion that the businesses here were unitary. The Court of Appeals affirmed the
    findings of the Tribunal. Because we agree with the thorough analysis of the Court of
    Appeals, we adopt its conclusions and holding in full:
    The first factor, economic realities, addresses whether the regularly
    conducted activities of the businesses in question are related. Holloway,
    152 Mich App at 832. The record shows that the underlying businesses of
    Electro-Wire and TKG were identical because both were engaged in the
    manufacturing and assembling of electrical distribution systems.
    Respondent claims that this is immaterial because the two businesses were
    engaged in the same underlying business before Electro-Wire purchased
    TKG. However, there is no requirement under Holloway or related cases
    that potentially unitary businesses develop the same underlying activities
    collaboratively; the only requirement is that the underlying businesses be
    related to each other.
    The second factor, functional integration, concerns the extent to
    which business functions are blended to promote a unitary relationship.
    Petitioners presented evidence that, before it was acquired by Electro-Wire,
    TKG was part of the Daimler Group. Once Electro-Wire purchased TKG,
    however, this relationship was severed, leaving TKG without critical
    support services, which were assumed by Electro-Wire. These services
    included direct management of TKG’s business activities and support for
    component engineering, manufacturing and industrial engineering, cost
    estimating, business development, finance, and executive administration.
    53
    See, generally, Holloway Sand, 152 Mich App at 835 (mentioning a “sixth factor”
    resulting from the taxpayer’s treatment of capital gains from one of the businesses); see
    also Container Corp, 
    463 US at 179
     (approving a California Court of Appeals reliance on
    “a large number of factors” to conclude that a domestic corporation and its foreign
    subsidiaries were unitary).
    19
    Respondents presented no rebuttal evidence, but set forth on appeal a list
    identifying ways in which Electro-Wire and TKG were not integrated.
    However, this belated argument is not persuasive because there is no
    requirement that businesses be 100 percent integrated in order to classify
    them as unitary.
    The third factor examines the extent to which management was
    centralized across the potentially unitary business. Petitioners submitted
    unrebutted evidence that TKG’s overall management decisions were
    centralized and directed by Electro-Wire managers in North America and
    that Electro-Wire hired and fired all TKG officers and managers. Again,
    respondent presented no rebuttal evidence, but alleges that Electro-Wire did
    not engage in day-to-day management of TKG. Again, however, the only
    requirement under Holloway is centralized management, not complete
    management.
    The fourth factor looks for the presence of economies of scale.
    Petitioners presented unrebutted evidence of economic benefits generated
    by the combination of Electro-Wire and TKG, such as an expanded
    customer base, sharing of unique and proprietary processes, and improved
    financing terms. Respondent presented no evidence to challenge this, but
    argues that petitioners failed to show profits through bulk purchasing or
    improved allocation of resources. These are typically considered to be
    common economies of scale, but respondent does not explain how cheaper
    component parts, an expanded customer base, increasing economic
    diversification, and improved financing conditions are not also benefits
    derived from economies of scale.
    The fifth and final factor considers whether substantial mutual
    interdependence exists. Petitioners submitted unrebutted evidence that
    acquiring TKG was essential for Electro-Wire to remain a supplier for Ford
    and that remaining a supplier for Ford was essential to Electro-Wire’s
    survival. The Tax Tribunal found that Electro-Wire was dependent on
    TKG, but was unable to conclude whether or not TKG was similarly
    dependent on Electro-Wire, and thus resolved this factor partially in favor
    of petitioners.[54]
    Based on the foregoing, we hold that the Tax Tribunal’s factual finding that
    Electro-Wire and TKG were a unitary business was “supported by competent, material,
    54
    Wheeler Estate, 297 Mich App at 423-425.
    20
    and substantial evidence on the whole record.”55 Because there was evidentiary support
    for all of the unitary factors, the Court of Appeals properly affirmed the Tax Tribunal’s
    conclusion that Electro-Wire and TKG constituted a unitary business.          Because we
    discern no limitations on the geographical boundaries to which the combined reporting
    could extend, the Wheelers could combine the profits and losses from Electro-Wire and
    TKG and then apportion, using the companies’ combined apportionment factors.
    IV. CONCLUSION
    In Malpass, we hold that the ITA permitted the individual taxpayers to combine
    the flow-through business income from the unitary business of East Jordan and Ardmore
    and then apportion, using the combined apportionment factors of the unitary business.
    Accordingly, we reverse the Court of Appeals and remand to the Court of Claims for
    reinstatement of the order granting summary disposition in favor of plaintiffs.
    In Wheeler, we hold that the Court of Appeals properly determined that the
    Wheelers could combine their flow-through income from the unitary business of Electro-
    Wire and TKG. In so doing, we hold that the ITA contained no geographical limitations
    for the tax years of 1994 and 1995 and that combined reporting was proper even though
    the unitary business included an entity located in a foreign country. We affirm the
    55
    Klooster, 488 Mich at 295.
    21
    judgment of the Court of Appeals, but we vacate Section III(A) of the Court of Appeals’
    opinion because that analysis is inconsistent with our analysis herein and relied on the
    Court of Appeals’ erroneous decision in Malpass, which we reverse today.
    David F. Viviano
    Robert P. Young, Jr.
    Michael F. Cavanagh
    Stephen J. Markman
    Mary Beth Kelly
    Brian K. Zahra
    Bridget M. McCormack
    22