Frey v. Comptroller of the Treasury, 29 A.3d 475

Maryland imposes a Special Nonresident Tax (SNRT) on nonresidents who earn Maryland income but do not pay a local county tax, with SNRT rate equal to the lowest Maryland county income tax rate.
Nonresidents’ SNRT revenue goes to the State General Fund, while residents’ county taxes go to the respective counties; thus SNRT funds are not earmarked to specific counties.
Petitioners are Pennsylvania residents who practiced law in several states via a Delaware-based firm; they paid Maryland state income tax and local taxes where applicable for 2004 and were assessed SNRT for income attributed to Maryland operations.
In 2005 the Comptroller issued SNRT assessments for 2004 unpaid SNRT; petitioners challenged the SNRT on Interstate Commerce, Due Process and Maryland constitutional grounds.
The Tax Court upheld the SNRT as a valid compensatory tax under Fulton and related doctrine; the Circuit Court and Court of Special Appeals affirmed on constitutional grounds, including equal protection and privileges & immunities, and allowed abatement of penalties while potentially allowing abatement of interest.
The Maryland Court of Appeals ultimately held that the SNRT does not violate the Commerce Clause, Equal Protection Clause, Privileges and Immunities Clause, or Article 24 of the Maryland Declaration of Rights, and that the Tax Court has authority to abate interest, remanding for consideration of interest abatement.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Does SNRT violate the Commerce Clause as facially discriminatory yet compensatory	Frey contends SNRT discriminates against interstate commerce.	Comptroller argues SNRT is a state tax substitution that is compensatory and not discriminatory in effect.	SNRT satisfied compensatory tax doctrine; no Commerce Clause violation.
Does SNRT violate the Equal Protection Clause	Frey asserts SNRT imposes higher tax on nonresidents without rational basis.	Comptroller argues rational basis exists to equalize resident/nonresident burdens due to local services.	SNRT passes rational-basis review; does not violate Equal Protection.
Does SNRT violate the Privileges and Immunities Clause	Frey warns of potential tax wars and unequal treatment of nonresidents among states.	Comptroller maintains Maryland's scheme treats nonresidents and residents with substantial equality.	SNRT does not violate Privileges and Immunities Clause; burden is related to nonresident’s relationship to the state and is reasonably related to state interests.
Does SNRT violate Article 24 of the Maryland Declaration of Rights	Frey contends the tax scheme is irrational and irrationally discriminates against nonresidents.	Comptroller contends Article 24 equal protection principles mirror federal analysis; rational basis suffices.	SNRT satisfies Maryland Article 24 equal protection principles; not irrational.

Fulton Corp. v. Faulkner, 516 U.S. 325 (U.S. Supreme Court 1996) (three-prong compensatory tax test for facially discriminatory taxes)
Oregon Waste Sys., Inc. v. Dep't of Envtl. Quality, 511 U.S. 93 (U.S. Supreme Court 1994) (establishes compensatory tax doctrine thresholds and use of intrastate burden)
Shaffer v. Carter, 252 U.S. 37 (U.S. Supreme Court 1920) (state may tax nonresidents on in-state income; broad taxing power)
Maryland v. Louisiana, 451 U.S. 725 (U.S. Supreme Court 1981) (equality of treatment between local and interstate taxation under compensatory doctrine)
Stern v. Comptroller of the Treasury, 271 Md. 310 (Md. 1974) (county income tax treated as part of state-administered income tax scheme)
Comptroller of the Treasury v. Blanton, 390 Md. 528 (Md. 2006) (clarifies credit applicability to state vs. county income taxes)
Travellers' Ins. Co. v. Connecticut, 185 U.S. 364 (U.S. Supreme Court 1902) (classic equal protection/taxation precedent in state taxation)
Toomer v. Yale & Towne Mfg. Co., 252 U.S. 60 (U.S. Supreme Court 1920) (privileges and immunities considerations in tax treatment of nonresidents)
Armco, Inc. v. Hardesty, 467 U.S. 638 (U.S. Supreme Court 1984) (comparing events for substantial equivalence in compensatory tax analysis)