Can Utah tax residents on foreign income without providing foreign tax credits? Steiner v. Tax Commission Explained

The Utah Supreme Court in Steiner v. Tax Commission addressed whether Utah’s income tax system violates the Dormant Commerce Clause and Dormant Foreign Commerce Clause by taxing residents on out-of-state and foreign income without providing corresponding tax credits.

Background and Facts

The Steiners were Utah residents who earned income through pass-through entities operating domestically and internationally. Utah taxed their worldwide income but only provided credits for taxes paid to other states, not foreign countries. The Steiners claimed an “equitable adjustment” under Utah Code section 59-10-115(2) to exclude foreign income and challenged Utah’s failure to apportion out-of-state income. The Tax Commission disallowed the foreign income adjustment, leading to litigation in tax court.

Key Legal Issues

The court addressed three questions: (1) whether the Dormant Commerce Clause requires Utah to apportion residency-based income tax rather than providing credits for other state taxes; (2) whether the Dormant Foreign Commerce Clause requires deductions for foreign income; and (3) whether Utah’s equitable adjustment statute mandates foreign income deductions.

Court’s Analysis and Holding

The court applied the internal consistency test from Comptroller of Treasury of Maryland v. Wynne, finding Utah’s system constitutional because if every state adopted Utah’s approach, there would be no systematic discrimination against interstate commerce. Taxpayers earning income across state lines would face the same tax burden as those earning income solely in-state due to the credit system.

Regarding foreign commerce, the court declined to extend dormant commerce doctrine to individual taxpayers’ foreign income, noting the absence of controlling U.S. Supreme Court precedent. The court emphasized its reluctance to “break new ground” in dormant commerce jurisprudence, particularly given the doctrine’s acknowledged theoretical inconsistencies.

Practice Implications

This decision reinforces Utah courts’ cautious approach to expanding dormant commerce doctrine beyond established Supreme Court precedent. Practitioners challenging state tax provisions must identify direct controlling authority rather than seeking logical extensions of existing doctrine. The ruling also clarifies that Utah’s equitable adjustment statute applies only to double taxation imposed by Utah itself, not by foreign jurisdictions.