Iowa — Tax Residency Rule

Summary

Day threshold

More than 183 days

Window

Calendar year

Also requires

A permanent place of abode in Iowa

Effect

Worldwide income taxed as a resident

Authority

Iowa Department of Revenue

Iowa treats you as a statutory resident for income tax if both things are true in the same calendar year: you spend more than 183 days in the state and you maintain a permanent place of abode in Iowa. Meet both and Iowa taxes your worldwide income. To stay outside this rule, keep your Iowa days at 183 or fewer in any single year, or avoid keeping a permanent abode there — though note that being domiciled in Iowa is a separate route to residency that ignores the day count entirely.

Who it applies to

This matters most if you are:

• A remote worker, snowbird, or frequent traveler spending long stretches in Iowa.
• Someone who keeps a home in Iowa while living or working mostly in another state or country.
• A person moving into or out of Iowa mid-year, where the days on either side of the move add up.

It applies to individuals regardless of citizenship — Iowa residency here is about physical presence and a maintained home, not visa or immigration status.

The rule — and why it exists

Iowa individual income tax is set out under Iowa Code Chapter 422 and administered by the Iowa Department of Revenue. There are two independent ways to become an Iowa resident for tax:

• Statutory residency (the 183-day test). More than 183 days of physical presence in a calendar year, combined with a permanent place of abode in Iowa, makes you a resident for that year.
• Domicile. If Iowa is your true, fixed, permanent home — the place you intend to return to — you are an Iowa resident regardless of how many days you spend there.

Why it exists: states use physical presence plus a maintained home as a practical proxy for where someone's economic life actually sits. The two-part test stops people avoiding residency purely by watching the calendar while still keeping a permanent base in the state.

Counting the days

1. 1Count each day, or part of a day, you are physically present in Iowa during the calendar year (January 1 to December 31).
2. 2Any part of a day generally counts as a full day, unless you are only passing through in transit.
3. 3The count resets to zero at the start of each new calendar year — it is a fresh annual tally, not a rolling window.
4. 4You become a statutory resident once you exceed 183 days while also holding a permanent place of abode in the state.

Because the window is the calendar year, a single long stay split across a year-end can leave you under the threshold in each individual year even if the trip itself runs longer than six months.

Examples

Example 1 — clearly a statutory resident

You rent a home in Des Moines all year and are physically in Iowa for about 210 days. You exceed 183 days and maintain a permanent abode, so you are an Iowa statutory resident and Iowa taxes your worldwide income for that year.

Example 2 — over 183 days but no permanent abode

You spend 200 days in Iowa staying in short-term rentals and hotels while working on a project, keeping no year-round home there. The day count is met, but without a permanent place of abode the statutory-resident rule does not apply.

Example 3 — a stay across year-end

You keep an Iowa apartment and are present from October 1 through April 30 — about seven continuous months. Because the count is per calendar year, roughly three months fall in each year, so you may stay at or under 183 days in both, even though the trip itself exceeds six months.

Exceptions & edge cases

• Domicile overrides the count. If Iowa is your domicile, you are a resident even below 183 days — the day test is only one route in, not the only one.
• The abode must be genuinely permanent. A property let to tenants and unavailable to you, or a place kept only briefly, generally does not count as a permanent place of abode.
• Part-year residents. Someone who moves into or out of Iowa partway through the year is generally taxed as a part-year resident on the relevant portion, which follows its own rules.
• Dual state claims. Where another state also claims you as a resident, credits for taxes paid to the other state usually prevent full double taxation — but the mechanics are technical.

Common misconceptions

• "Under 183 days means I'm not an Iowa resident." False — domicile can make you a resident with far fewer days.
• "Any place I stay in Iowa makes me a statutory resident." No — the abode must be a maintained dwelling suitable for year-round living, not a hotel or short-term stay.
• "Only my Iowa income is taxed." A statutory resident is taxed on worldwide income for the year, not just Iowa-source income.
• "The 183 days can roll across years." The count is a fresh calendar-year tally that resets every January 1.

Frequently asked questions

Sources

• Iowa Department of Revenue — Individual income tax
• Iowa Legislature — Iowa Code Chapter 422, Individual Income Tax