You generally should not claim a credit for taxes paid to another state on a part-year resident return unless specific conditions are met. Here's why:
1. Income Must Be Taxed in Both States
- The credit is only allowed if the same income is taxed by both states.
- If you earned income while living in one state and then moved, that income is typically taxed only by the state where it was earned.
2. Part-Year Returns Use Income Allocation
- Most states calculate part-year resident tax based on the income earned while living in that state, not your total income for the year.
- If you try to claim a credit for taxes paid to another state on income not taxed by your current state, it could inflate your refund and lead to owing money later.
3. Double Taxation Must Be Proven
- If there’s no overlap in income taxed by both states (e.g., you worked in California before moving to Oregon), you won’t qualify for the credit.
- Even if you worked remotely, some states (like New York) may still claim the income is sourced to them, complicating the credit eligibility
4. State-Specific Rules Vary
- Some states (like Oregon) may offer a credit only if the other state does not.
- Others use an income ratio to prorate tax liability, which can reduce or eliminate the need for a credit.
If the income is not taxed in both states, you do not qualify to take the credit. Claiming the credit may inflate your refund and cause you to owe money to the state later.
Generally, part-year returns calculate your tax based only on the income that was earned in the state (unlike resident returns, where your tax is generally calculated based on all of your income, regardless of where it was earned).
Some part-year state returns start by calculating the total tax on all of your income. Then, your actual tax is calculated based on the percentage of your total income that was actually earned in the state. Because the result is a tax amount that is based only on the amount (or percentage) of income that was earned in the state, and not actually based on your total income from all sources, you generally cannot take a credit for the taxes you paid to another state.
Important: This credit is not simply a credit because you paid taxes to another state. It is only intended to be used to reduce a tax liability that is calculated based on income that was taxed by another state.
When can I claim the credit?
- You lived in one state but earned income in another at the same time.
- Both states taxed the same income.
- You are filing a resident return in one state and a nonresident return in the other.