Resident credit
Also: resident credit, credit for taxes paid to other states, out-of-state credit
A credit allowed by the taxpayer's resident state for income taxes paid to another state on the same income, preventing double state taxation.
A resident credit prevents double state taxation of income sourced to one state and reported in the residence state. The taxpayer files a non-resident return in the source state, pays tax there, and then claims a credit on the resident-state return for the tax paid, limited to what the resident state would have imposed on the same income. Rules vary: California allows the credit only for taxes paid to certain reverse-credit states, while New York, New Jersey, and most others allow a broad credit against any other state’s tax.
Example: a New York resident earns RSU income sourced 40% to California for workdays performed before moving. She pays $32,000 of California tax on the $240,000 California-source portion. New York’s tax on the same income would have been $27,000. New York grants a credit of $27,000, capped at New York’s calculated liability. The remaining $5,000 of California tax is unrecovered.
Common mistake: failing to file the non-resident source-state return. No filing means no tax paid, which means no credit. The resident state will still tax the full amount.
Resident credits matter in every multi-state filing year, particularly for the first year in the new state and for any year containing RSU vests from pre-move grants.