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1099 Contractor in Iowa with a Wisconsin Client: Where Do You File?

Home state, plus the client state if you work thereNo withholding — 1099

Answer

Two possible returns, one certainty. The certainty is Iowa, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Wisconsin, which taxes nonresidents on services actually performed inside the state — invoices sent there do not count.

Last verified

Reciprocity agreements are the first thing contractors ask about and the first thing that does not apply to them. Every agreement in the country is a wage-withholding arrangement, and a 1099 has no withholding to switch off.

Wisconsin publishes a dollar floor for nonresidents rather than a day count. Wisconsin publishes a nonresident gross-income floor: a nonresident with Wisconsin gross income below the published amount is not required to file a Wisconsin return. Reaching it brings the whole Wisconsin-source amount into the return.

What you file

  1. 1Quarterly estimated payments · Iowa

    Make quarterly estimated payments to Iowa Department of Revenue on your full self-employment income — nothing is withheld from a 1099.

  2. 2Nonresident return · WisconsinForm 1NPR

    File a Wisconsin nonresident return only if you performed services inside Wisconsin. Wisconsin publishes a nonresident gross-income floor: a nonresident with Wisconsin gross income below the published amount is not required to file a Wisconsin return. Reaching it brings the whole Wisconsin-source amount into the return.

  3. 3Resident return · IowaForm IA 130

    File the Iowa resident return last and claim the credit for any tax paid to Wisconsin.

The two states, side by side

 IowaWisconsin
Taxes wagesYes — flatYes — graduated
Reciprocity partners1 (Form 44-016)4 (Form W-220)
Convenience ruleNoNo
Nonresident returnForm IA 1040 with Schedule IA 126Form 1NPR
Credit for other-state taxForm IA 130Schedule OS
Nonresident safe harbourNone publishedDollar floor published
Local income taxYesNo
Revenue departmentIowa Department of RevenueWisconsin Department of Revenue
Last verified

The other direction

Reversing the commute does not always reverse the answer. Living in Wisconsin and working in Iowa gives:Home state, plus the client state if you work there.

Wisconsin to Iowa →

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.

Other Iowa pairs

Questions people actually ask

I live in Iowa and my client is in Wisconsin. Do I have to file a Wisconsin tax return?

Two possible returns, one certainty. The certainty is Iowa, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Wisconsin, which taxes nonresidents on services actually performed inside the state — invoices sent there do not count.

Do reciprocity agreements help a 1099 contractor?

No. Every state reciprocity agreement in the country is an arrangement about wage withholding between two revenue departments, and a 1099 has no withholding to switch off. Whether Iowa and Wisconsin hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.

How current is this?

The Iowa and Wisconsin rules on this page were last checked against Iowa Department of Revenue and Wisconsin 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.