Missouri — Tax Residency Rule

Summary

Day threshold

More than 183 days

Window

Taxable year (calendar year for most)

Also requires

A permanent place of abode in MO

Effect

Taxed as a resident on all income

Basis

RSMo § 143.101

If you are domiciled elsewhere, you become a Missouri resident for income tax when you maintain a permanent place of abode in Missouri and spend more than 183 days of the taxable year there. If Missouri is your domicile, you are a resident unless you keep no permanent place of abode in Missouri, keep one elsewhere, and spend 30 days or fewer in the state. Both rules sit in RSMo § 143.101.

Who it applies to

This matters most if you are:

• A remote worker or frequent traveler spending long stretches in Missouri while living mainly elsewhere.
• Someone who keeps a house or apartment in Missouri but splits time between states.
• A person moving into or out of Missouri mid-year, where days in the state pile up over the calendar year.

It applies to individuals based on physical presence and available housing in Missouri — not on where you were born or which other state you consider home.

The rule — and why it exists

RSMo § 143.101 defines a resident in a single sentence with two halves, administered by the Missouri Department of Revenue:

• Statutory residency. More than 183 days of physical presence in Missouri during the calendar year, combined with a permanent place of abode in the state, makes you a resident for that year.
• Domicile, with a 30-day exception. If Missouri is your true, fixed, permanent home, you are a resident unless you (1) maintain no permanent place of abode in Missouri, (2) maintain one elsewhere, and (3) spend in the aggregate no more than 30 days of the taxable year in Missouri.

Why it exists: states use days present and a permanent home as proxies for where your economic life really sits. Pairing the day count with an abode requirement stops people from claiming non-residency purely on a day count while still keeping a full-time base in the state.

Counting the days

1. 1Count each day, or part of a day, you are physically present in Missouri during the calendar year (1 January to 31 December).
2. 2Missouri doesn't define a partial day, so counting any day in the state as a full day is the cautious approach.
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 stay split across a year-end can leave you under the threshold in each individual year even if the trip itself is longer.

Examples

Example 1 — clearly a statutory resident

You rent a year-round apartment in St. Louis and spend about 210 days in Missouri this calendar year. You exceed 183 days and hold a permanent place of abode, so you are a Missouri statutory resident and taxed on all income for the year.

Example 2 — over 183 days but no abode

You spend 200 days in Missouri on work assignments but stay in short-term hotels and keep no home there. Without a permanent place of abode, the statutory-resident test is not met on days alone — though domicile could still be examined separately.

Example 3 — a stay across year-end

You keep a Missouri home and stay from 1 October to 30 April. That is roughly 212 continuous days, but it splits into about 92 days in the first calendar year and about 120 in the next — under 183 in each — so neither year alone trips the statutory day count.

Exceptions & edge cases

• Domiciliaries face a 30-day line, not 183. A Missouri domiciliary stays a resident with any number of days unless all three parts of the exception hold: no Missouri abode, an abode elsewhere, and 30 days or fewer in the state.
• Hotels are not a permanent place of abode. Staying in hotels or short-term rentals booked trip by trip is not maintaining permanent living quarters in Missouri.
• Part-year residents. Moving into or out of Missouri mid-year can create part-year residency for the portion of the year you were a resident, with its own filing treatment.
• Both conditions, same year. The day count and the abode must be met in the same calendar year before the statutory-resident rule applies.

Common misconceptions

• "Under 183 days means I'm safe." Not if Missouri is your domicile — then the line is 30 days, and only if you also have no Missouri abode and an abode elsewhere.
• "Days alone make me a resident." The statutory test also requires a permanent place of abode; over 183 days without an abode does not, by itself, satisfy it.
• "Only my Missouri income is taxed." A statutory resident is taxed on all income for the year the test is met.
• "The days must be one unbroken trip." The count is a running tally of every day of presence across the calendar year, not a single continuous stay.

Frequently asked questions

Sources

• Missouri Department of Revenue — Nonresidents and residents with other state income (definitions)
• Missouri Revisor of Statutes — RSMo § 143.101 (resident, nonresident)