Work in Iowa, Live in Wisconsin: How the Taxes Split (2026)

The rule at the border

Which state taxes an Iowa paycheck when you live in Wisconsin?

Iowa taxes wages that are earned inside its borders. Iowa keeps a single wage reciprocity agreement, and it is only with Illinois. The Iowa Department of Revenue states plainly that Iowa's only income tax reciprocal agreement is with Illinois. Wisconsin is not on that list, so a Wisconsin resident who commutes to an Iowa worksite or works there part of the year owes Iowa tax on the wages for the Iowa workdays.

Wisconsin, for its part, taxes every dollar its residents earn no matter where the work is done. That is the standard rule for a resident state. It means the same Iowa wages will show up on both returns. The system prevents double taxation through a credit on the Wisconsin side, not through withholding relief on the Iowa side. In other words, you cannot ask an Iowa employer to skip Iowa withholding just because you live in Wisconsin. That form of relief only exists for Illinois residents under the current arrangement.

If your job is remote and you never physically set foot in Iowa, the picture changes. Iowa taxes compensation for services performed in Iowa, so a fully remote Wisconsin-based worker whose employer sits in Des Moines but who works from Madison usually owes Iowa nothing on those wages. Ask your employer to withhold only Wisconsin tax in that case.

History and the current agreement

Do Iowa and Wisconsin have wage reciprocity in 2026?

No. Iowa and Wisconsin do not have a wage reciprocity agreement for the 2026 tax year. Iowa lists exactly one reciprocity partner and it is Illinois. The Iowa page describing that pact spells out the mechanics: wages of an Iowa resident working in Illinois are taxable only to Iowa, and wages of an Illinois resident working in Iowa are taxable only to Illinois. No comparable sentence exists for Wisconsin.

That absence is the whole answer for a commuter. Because Iowa treats you as a nonresident with Iowa-source wages, it expects an Iowa return and Iowa withholding. Wisconsin then reclaims the right to tax your worldwide income as a resident state, and offsets the Iowa tax with a credit so you do not pay tax twice on the same dollars. Iowa's guidance names Illinois as its only partner.

Two returns, two forms

Which returns and forms do you actually file?

You will file two individual income tax returns for the year you work in Iowa. Start with Iowa, then finish Wisconsin, because the Wisconsin credit is computed from amounts on the Iowa return.

• Iowa side. File the IA 1040 as a nonresident. The IA 1040 starts from your federal taxable income and reports all-source income; Schedule IA 126, the Iowa Nonresident and Part-Year Resident Credit Schedule, lists only the Iowa-source income, works out its percentage of total income, and gives a credit for the share earned outside Iowa. Include a copy of IA 126 and of your federal return.
• Wisconsin side. File Form 1 as a full-year resident and report the same Iowa wages. Attach Schedule OS, the credit for net tax paid to another state, with a copy of your Iowa return and your W-2s; the credit goes on Form 1 line 20. A part-year resident files Form 1NPR instead.
• Federal return. File Form 1040 as usual.

Iowa's filing deadline is April 30, not April 15. Iowa has no extension form and a federal extension does not apply; if 90% of the tax is paid by April 30, the deadline moves to October 31.

A nonresident must file when Iowa-source net income on IA 126 line 27 is $1,000 or more, unless total income is below Iowa's filing thresholds. Below $1,000 of Iowa-source income you are not required to file and are exempt from Iowa tax, but you must file to get back any Iowa tax that was withheld.

Wisconsin credit mechanics

How does the Wisconsin credit on Schedule OS work?

Schedule OS lets a Wisconsin resident subtract the net income tax paid to Iowa from the Wisconsin tax on income that both states tax. You enter the Iowa net tax after proration and after all Iowa credits, not the amount withheld. To be eligible, you must have been a Wisconsin resident when you received the income.

For most states, Wisconsin limits the credit to the lesser of your Wisconsin net tax, the tax paid to the other state, and the Wisconsin tax on the income taxed by both. That third limit does not apply to income taxed by Minnesota, Illinois, Iowa or Michigan, and the Schedule OS form tells you to skip those lines for Iowa. So for Iowa wages the credit is the Iowa net tax on the shared income, capped only by your total Wisconsin net tax. Because Iowa's 3.8% flat rate is usually below Wisconsin's rate on the same wages, most commuters still owe Wisconsin the difference.

Do not confuse Schedule OS with the reciprocity route. Illinois, Indiana, Kentucky and Michigan are Wisconsin's reciprocity partners, and Wisconsin tells workers with tax withheld for those states not to use Schedule OS. Iowa is not one of them, so you file the Iowa nonresident return and take the Wisconsin credit.

Withholding at the paycheck

What should your employer withhold from Iowa wages?

An Iowa employer doing business in Iowa must withhold Iowa income tax from nonresident employees working in Iowa, at the same rate as for residents. New hires complete the Iowa W-4 within 15 days. The 2026 formula applies 3.80 percent (0.038) after a standard withholding deduction (for example $13,000 a year in the first column) and then subtracts the allowance amount the employee claims on the IA W-4. Iowa notes that this withholding deduction is not the federal standard deduction the return uses, so a full-year commuter often sees a small Iowa refund.

Wisconsin withholding follows residence: Wisconsin's employer guide says wages paid to Wisconsin residents are subject to Wisconsin withholding even for services performed entirely outside Wisconsin. If your Iowa employer does not withhold Wisconsin tax, plan for the Wisconsin balance. Wisconsin requires estimated payments on Form 1-ES if you expect to owe at least $500 after withholding and credits, and an underpaid installment costs interest. Iowa's own estimated-tax threshold rises to $1,000 for 2026.

If you telecommute from Wisconsin on some days and travel to Iowa on others, ask payroll to split the wages. Iowa allocates a nonresident's compensation by the number of days worked in Iowa to total work days, so days at your Wisconsin desk are not Iowa-source.

Worked example: Wisconsin resident earning $75,000 from an Iowa employer in 2026

Single filer, all wages for work in Iowa, no other income, standard deductions, 2026 rules: Iowa starts from federal taxable income (2026 federal standard deduction $16,100); Wisconsin uses the 2026 schedules from the 2026 Form 1-ES instructions. Before other Wisconsin credits. Approximate.

Remote days and moving mid-year

How do remote work, hybrid schedules, and mid-year moves change the split?

Iowa taxes compensation for services performed in Iowa and allocates by workdays. A hybrid worker who is in the Cedar Rapids office two days a week and works from Madison the other three days would have about 40 percent of the wages sourced to Iowa. Keep a day log, calendar entries or badge records to back up the split.

Mid-year moves are handled with part-year filing on both sides. A worker who lived in Iowa through May and moved to Wisconsin in June files Iowa as a part-year resident with IA 126: Iowa-source income then includes all income received while living in Iowa plus Iowa-source income received after the move. On the Wisconsin side the part-year return is Form 1NPR, and Schedule OS covers only income received while a Wisconsin resident.

Wisconsin defines domicile as your true, fixed and permanent home to which you intend to return. Iowa's definition of resident is wider: it includes anyone domiciled in Iowa and anyone who maintains a permanent place of abode in Iowa. Keeping a dwelling near the Iowa worksite can therefore make a Wisconsin commuter an Iowa resident for tax, so check that rule before signing a long lease.

Local taxes and school surtax

Do city, county, or school district taxes apply to your paycheck?

Iowa has no city or county wage tax withheld from employees. Its two local surtaxes are tied to residence: the school district surtax applies to individuals residing in the school district on the last day of the tax year, and the county emergency medical services surtax applies to individuals residing in the county at year-end. Only Appanoose, Cass, Pocahontas, Sac, Shelby and Winnebago counties currently have the EMS surtax. As a Wisconsin resident, neither reaches you.

Wisconsin local governments may levy only the taxes the Legislature authorizes. Besides the property tax, the authorized optional local taxes are a county sales and use tax, a vehicle registration fee and a room tax, so there is no city or county income tax on wages. Property taxes are billed by your Wisconsin municipality regardless of where you work.

Fixing withholding mistakes

What if your employer withheld tax to the wrong state?

If your employer withheld Wisconsin tax but no Iowa tax on wages for Iowa workdays, Iowa still expects its tax on those wages: file the IA 1040 and pay the Iowa balance, and claim the Wisconsin withholding on Form 1, where the Schedule OS credit also reduces your Wisconsin tax. Ask payroll to start Iowa withholding for the rest of the year.

The opposite mistake, Iowa withholding for a fully remote worker who never works in Iowa, is corrected by filing an Iowa nonresident IA 1040 with an IA 126 that shows no Iowa-source wages. With Iowa-source income below $1,000 you are exempt from Iowa tax, and filing returns the Iowa withholding. Wisconsin taxes those wages as usual.

If you find the mistake during the year, ask payroll to correct the withholding state for the remaining pay periods and keep records of where you worked.