Live in California, Work in Iowa: Which State Taxes Your Paycheck?
Answer
You file twice: Iowa first, then California. There is no reciprocity agreement between these two states, so Iowa taxes the income where it was earned and California taxes it again as resident income — with the resident credit removing the double charge rather than an exemption form preventing it.
Last verified
Without an agreement between California and Iowa, the overlap is handled after the fact rather than prevented. That is why the filing order matters: the Iowa figure is an input to the California return, so completing California first means doing it twice.
A California resident taxed by another state on the same income claims the credit for taxes paid to other states on Schedule S. The credit is capped at the California tax on that income, so it removes the double tax but never refunds the excess when the other state charges more.
Iowa also has a layer below the state one, and it is the layer that survives every agreement: Many Iowa school districts levy a surtax calculated as a percentage of state income tax. It is reported on the state return rather than separately.
What you file
- 1Nonresident return · IowaForm IA 1040 with Schedule IA 126
File the Iowa nonresident return FIRST — you need the Iowa tax figure before you can complete California.
- 2Resident return · CaliforniaSchedule S
File a California resident return reporting all income, then claim the credit for tax paid to Iowa. The credit is capped at what California would have charged on that same income, so if Iowa taxes it at a higher rate the difference is not refunded.
The two states, side by side
| California | Iowa | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — flat |
| Reciprocity partners | None | 1 (Form 44-016) |
| Convenience rule | No | No |
| Nonresident return | Form 540NR | Form IA 1040 with Schedule IA 126 |
| Credit for other-state tax | Schedule S | Form IA 130 |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | Yes |
| Revenue department | California Franchise Tax Board | Iowa Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Iowa and working in California gives:Both states — credit offsets the double tax.
Same two states, different situation
The withholding answer turns on how you are paid and where the work happens, not only on which two states are involved.
- Remote worker: California → IowaHome state only
- 1099 contractor: California → IowaHome state, plus the client state if you work there
- Moved mid-year: California → IowaTwo part-year returns
Other California pairs
Questions people actually ask
I live in California and work in Iowa. Which state takes the tax out of my paycheck?
You file twice: Iowa first, then California. There is no reciprocity agreement between these two states, so Iowa taxes the income where it was earned and California taxes it again as resident income — with the resident credit removing the double charge rather than an exemption form preventing it.
Which state should my employer be withholding for?
Iowa. The wages are sourced to Iowa, so Iowa withholding is correct and there is no California withholding to set up.
Will I end up paying tax twice on the same income?
Not twice over, but you will pay the higher of the two rates. California gives residents a credit for tax paid to Iowa on the same income, claimed on Schedule S. The credit is capped at the California tax on that income, so if Iowa taxes it more heavily the excess is not refunded by either state.
How current is this?
The California and Iowa rules on this page were last checked against California Franchise Tax Board and Iowa Department of Revenue on 2026-08-07. We re-check the full grid every December after state legislative sessions close, and re-check the convenience-of-the-employer states quarterly because that is where the rules move fastest.
Sources
Every fact above comes from the revenue department that publishes the rule. We do not cite secondary summaries, and we do not restate a figure we could not find at source.
- California Franchise Tax Board — individual income taxaccessed 2026-08-07
- Iowa Department of Revenue — individual income taxaccessed 2026-08-07