Missouri — Tax Residency Rule

Summary

Day threshold

More than 183 days

Window

Calendar year

Also requires

A permanent place of abode in MO

Effect

Taxed as a resident on all income

Authority

Missouri Department of Revenue

Missouri 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 there. To stay outside statutory residency, keep your Missouri days at 183 or fewer, or avoid keeping a permanent abode in the state. Note that a separate domicile test can make you a resident regardless of the day count.

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

The test sits in Missouri's income tax law under Chapter 143 of the Revised Statutes and is administered by the Missouri Department of Revenue. There are two independent routes to resident treatment:

• 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. If Missouri is your true, fixed, permanent home — the place you intend to return to — you can be taxed as a resident even below 183 days, under a separate test.

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. 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 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

• Domicile overrides the day count. If you are domiciled in Missouri, you can be taxed as a resident even with fewer than 183 days in the state.
• The abode must be genuinely yours to use. A property not suited to year-round living, or one you keep only briefly, generally does not count as a permanent place of abode.
• 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 necessarily — domicile can make you a Missouri resident with far fewer days.
• "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 — Individual Income Tax
• Missouri Revised Statutes — Chapter 143, Income Tax