*285 OPINION OF THE COURT
In this сombined action for a declaratory judgment and CPLR article 78 relief petitioners challenge the constitutionality of Tax Law § 631 (b) (6), which disallows nonresidents a full deduction for alimony payments from their New York State income tax liability. The central question before us is whether Tax Law § 631 (b) (6) violates the Privileges and Immunities Clause of the United States Constitution. We conclude the statute is constitutional.
Petitioners Christopher H. Lunding and his wife Barbara J. Lunding are Connecticut residents. In 1990, Mr. Lunding, a partner in a New York City law firm, derived substantial income from the practice of law in this State. On their joint New York nonresident tax return filed for the yеar 1990, they reported a Federal adjusted gross income of $788,210, which included an adjustment of $108,000 for the full amount of alimony that Mr. Lunding had paid that year to his former spouse, also a Connecticut resident. On their return petitioners adjusted their New York State gross income by 48.0868% of the alimony payments — equaling $51,934 — which rеpresented the percentage of Mr. Lunding’s 1990 claimed New York business income.
Relying on Tax Law § 631 (b) (6) the Audit Division of the Department of Taxation and Finance denied the alimony deduction and recalculated petitioners’ New York tax liability, concluding that they owed an additional $3,724. A Notice of Deficiency in that amount followed.
Petitioners then filed an administrative petition with the Division of Tax Appeals challenging the Notice of Deficiency on the ground that Tax Law § 631 (b) (6) was unconstitutional. Specifically, petitioners claimed that the tax which was the subject of the Notice of Deficiency cannot be collected because the statute and the Department’s actions discriminate illegally against nonresidents in violation of the Privileges and Immunities, Equal Protection and Commerce Clauses of the United States Constitution.
The Administrative Law Judge sustained the disallowance, holding that the Tax Appeals Tribunal lacked authority to de
*286
clare the statute unconstitutional. In their exception petitioners conceded that the Tribunal’s jurisdiction did not encompass their constitutional challenge but asserted that principles of collateral estoppel and stare decisis аpplied, relying on the Third Department’s ruling in
Matter of Friedsam v State Tax Commn.
(
Thereafter, petitioners commenced an article 78 proceeding. The Appellate Division converted the constitutional challenge into a declaratory judgment action and retained as an article 78 proceeding the remaining portion seeking annulment of the Tribunal’s decision. While recognizing both that this Court had affirmed Friedsam solely on statutory grounds and that the statutory provisions in the two cases are different, the Appellate Division declared the statute violative of the Privileges and Immunities Clause. Respondent Commissioner appealed as of right (CPLR 5601 [b] [1]). We now reverse.
Statutory Scheme
Tax Law § 631 (b) (6), enacted as part of the Tax Reform and Reduction Act of 1987 (L 1987, ch 28) (TRARA), specifies that
"[t]he deduction allowed by section two hundred fifteen of the internal revenue code, relating to alimony, shall not сonstitute a deduction derived from New York sources.”
New York source income of a nonresident is defined under Tax Law § 631 as:
"(a) * * * the sum of the net amount of items of income, gain, loss and deduction entering into his federal adjusted gross income, as defined in the laws of the United States for the taxable year, derived from or connected with New York sources, including:
"(1) his distributive share of partnership income, gain, loss and deduction * * *
"(k) * * *
"(1) Items of income, gain, loss and deduction derived from or connected with New York sources shall be those items attributable to * * *
"(B) a business, trade, profession or occupation carried on in this state”.
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Beginning with the 1988 taxable year nonresidents’ income • from all sources is used in calculating their rate of New York tax. As we explained in
Brady v State of New York
(
Consequently, Tax Law § 601 (e) (1) provides:
"There is hereby imposed for each taxable year on the taxable income which is derived from sources in this state of every nonresident * * * a tax which shall be equal to the tax computed under subsections (a) through (d) of this section * * * as if such nonresident * * * were a resident, multiplied by a fraction, the numerator of which is such individual’s * * * New York source income determined in accordance with part III of this article [ 631] and the denominator of which is such individual's * * * federal adjusted gross income for the taxable year.”
The hypothetical "as if a resident” tax liability includes all deductions available to a resident, including a deduction for alimony payments. However, the numerator of the fraction (referred to as the "apportionment percentage”) — the nonresident’s New York source income — is not reduced by any non-business deductions (including alimony payments). The denominator — the nonresident’s Federal adjusted gross income — has under the Intеrnal Revenue Code been reduced by any alimony payments (26 USC § 215).
Petitioners urge that Tax Law § 631 (b) (6) is discriminatory because, without justification, it denies nonresidents the benefit of an alimony deduction from New York State tax liability. The Appellate Division agreed that the Privileges and Immunities Clause was violated. We answer the question differently.
Analysis
We begin with the familiar proposition that statutes — the enactments of a coequal branch of government — enjoy a presumption of constitutionality. Moreover, "in taxation, even more than in other fields, legislatures possess the greatest freedom in classification.”
(Austin v New Hampshire,
420 US
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656, 661-662 [citing
Madden v Kentucky,
The Privileges and Immunities Clause (US Const, art IV, § 2), entitling the "Citizens of each State * * * to all Privileges and Immunities of Citizens in the several States,” was intended to create a national economic union and establish a norm of comity between States. The Clause in essence ensures that citizens of State A may do business in State B on terms of substantial equality with the citizens of that State.
(See, Supreme Ct. of N. H. v Piper,
In two seminal decisions on State income taxation of nonresidents under the Privileges and Immunities Clause—
Shaffer v Carter
(
Thus, in
Shaffer
the Court upheld a provision of the Oklahoma income tax law that taxed nonresidents’ income derived from local property and business and limited their deductions to losses related to these in-State activities, where Oklahoma also taxed all income of its own citizens. Similarly in
Travis,
the Court considered a New York stаtutory provision limiting a nonresident’s income tax deductions to such as "are connected with income arising from sources within the state”
(Travis,
"there is no unconstitutional discrimination against citizens of other States in confining the deduction of expenses, losses, etc., in the case of non-resident taxpаyers, to such as are connected with income arising from sources within the taxing State, likewise is settled by [Shaffer].” (Id. at 75-76.)
The Travis Court, however, considered an additional provision of the Tax Law that disallowed nonresidents any personal exemptions and found this an unreasonable discrimination because New York’s prоffered hope of reciprocity did not justify the statute’s discriminatory effect (id. at 81-82).
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More recently, the Supreme Court in
Austin v New Hampshire
(
As these cases illustrate, the Privileges and Immunities Clause doеs not mandate absolute equality in tax treatment. Rather, disparity in tax treatment between residents and nonresidents is permissible "in the many situations where there are perfectly valid independent reasons for it”
(Toomer v Witsell,
In this State, the propriety of disallowing deductions to nonresidents for personal expenses unrelated to New York income-producing sources was definitively addressed in
Matter of Goodwin v State Tax Commn.
(
First, New York residents — unlike nonresidents — were subject to the burden of taxation on their worldwide income regardless of source and therefore were entitled to the offsetting benefit of full deductions (
After
Goodwin,
the Appellate Division in
Matter of Golden v Tully
(
Nor does our affirmance in
Friedsam
undercut
Goodwin’s
applicability here. In
Friedsam,
under facts similar to the present case, a Connecticut resident challenged New York’s policy of disallowing alimony deductions from a nоnresident’s New York adjusted gross income. The Appellate Division, again over the dissent of then-Justice Levine, upheld the challenge concluding that there was no social policy justification for the disparate treatment. We affirmed, but only on statutory grounds. Pointing to Tax Law former § 635 (c) (1) — which provided that "[t]he New York itemized deduction of a nonresident individual shall * * * be the same as for a resident individual” — we concluded the alimony disallowance was "contrary to statute and tax policy of this State.”
(Friedsam,
Now applying well-established principles to the facts before us, we conclude there is no violation of the Privileges and Immunities Clause. The disparate tax treatment of alimony paid by a nonresident is fully justified in light of the disparate treatment of income: nonresidents are taxed only on income earnеd in New York, while residents are taxed on all income earned from whatever sources. Focusing on the practical effect and operation of the challenged tax it is clear that the advantage granted residents is offset by the additional burden of being taxed on all sources of incоme. Indeed, unlike *291 Travis and Shaffer, nonresidents are not denied all benefit of the alimony deduction since they can claim the full amount of such payments in computing the hypothetical tax liability "as if a resident” under Tax Law § 601 (e).
Furthermore, the disallowance is substantially justified by the fact that petitioners’ alimony paymеnts are — not unlike the expenditures for life insurance, out-of-State property taxes and medical treatment at issue in
Goodwin
— wholly linked to personal activities outside the State. There is nothing to "warrant the petitioner’s shifting the allowance for these expenditures, which are intimately conneсted with the State of his residence, to New York State.”
(Goodwin,
Moreover, petitioners’ argument that the silence of TRARA’s legislative history as to the substantial reasons behind the treatment of nonresidents’ alimony deductions somehow preordains its unconstitutionality is without merit. Where, as here, substantial reasons for the disparity in tax treatment are apparent on the face of the statutory scheme, absence of a statement at the time of enactment will not invalidate the statute.
Petitioners fare no better under the Equal Protection and Commerce Clauses. Nothing in the Fourteenth Amendment prevents the States from imposing unequal taxatiоn on nonresidents, so long as the inequality is rationally related to the furtherance of a legitimate State interest
(see, Shaffer,
Accordingly, the judgment of the Appellate Division should be reversed, with costs, the petition dismissed and judgment granted declaring Tax Law § 631 (b) (6) constitutional.
*292 Judges Simons, Titone, Bellacosa, Smith, Levine and Ciparick concur.
Judgment reversed, etc.
