State Taxes

The 183-Day Rule: State Tax Residency Explained

By GetTaxCalculator Editorial Team· Published 2026-09-12

Many states use a 183-day rule to determine tax residency: if you spend 183 or more days in a state during the tax year, that state may consider you a resident for income tax purposes. However, the 183-day rule is not universal, and some states use different criteria like domicile (where you intend to live permanently).

What the 183-day rule is

The 183-day rule is a statutory residency test. Even if you consider another state your permanent home, a state with a 183-day test will treat you as a full-year resident for income tax purposes if you meet two conditions:

You maintained a permanent place of abode in the state (an owned or rented dwelling available for your use), and
You spent 183 or more days in the state during the tax year.

"183 days" is not arbitrary. It represents one day more than half a calendar year (182.5 days). States use this threshold to prevent residents from claiming a low-tax or no-tax domicile while effectively living in the high-tax state most of the year.

The threshold appears frequently because it mirrors the substantial presence test used in federal law for nonresident aliens, but each state sets its own rules. Some states use 183 days; others use a different number. The presence test is independent of your domicile, which is why both tests matter.

Domicile vs. statutory residency

Understanding state tax residency requires distinguishing two separate concepts:

Domicile is your permanent home, the place you intend to return to whenever you are away. You can have only one domicile at a time. Your domicile state taxes your worldwide income as a full-year resident. Changing domicile requires both leaving the old state and establishing a new permanent home elsewhere, supported by concrete actions (new driver's license, voter registration, updated will, changed banking records).
Statutory residency is a legal fiction created by a state's tax law. Even if your domicile is elsewhere, a state can treat you as a resident if you spend enough days there and maintain a place to stay. Statutory residency is triggered by presence, not intent.

The danger of dual residency arises when your domicile state taxes you as a resident AND another state also claims you as a statutory resident. Both states may tax your full income. While credits for taxes paid to another state can reduce (but not always eliminate) the overlap, dual residency is expensive and should be avoided through careful planning.

Which states use a 183-day test

Many states with income taxes use some version of a statutory residency test, though the exact threshold and the conditions vary. Common examples include:

New York uses a 183-day threshold combined with a requirement that you maintain a permanent place of abode in the state. New York is aggressive in auditing high-income individuals who claim a domicile change. Partial days generally count as full days in New York.
California uses a domicile-based test rather than a strict day count, but the Franchise Tax Board monitors departures closely. California's "safe harbor" rule provides some protection for temporary absences, but it does not apply to residents who leave permanently.
Massachusetts, Connecticut, Virginia, and many other states use similar statutory residency tests combining day counts with a requirement to maintain a permanent place of abode.

Because rules vary by state, you must check the specific rules for every state where you spend significant time. Find links to each state's official revenue department through our state tax directory.

Snowbirds: avoiding dual residency

A "snowbird" is someone who spends winters in a warm, low-tax state (such as Florida, Texas, or Arizona) and summers in a northern, often higher-tax state. The goal is usually to avoid the northern state's income tax by establishing domicile in the southern state.

The strategy can work, but it requires more than just spending winters in Florida. Here is what a successful domicile change for a snowbird looks like:

Change your domicile formally. Obtain a Florida (or Texas, Nevada, etc.) driver's license and vehicle registration. Register to vote in the new state. Update your will, trust, and beneficiary designations to reflect the new state. Change your bank account mailing address.
Limit days in the old state. If your old state uses a 183-day statutory residency test, spend no more than 182 days there (or fewer, to leave a buffer). Do not keep a permanent place of abode in the old state if you can help it. If you do keep a home there, the day count becomes the critical factor.
File a nonresident return in the old state if needed.If you still have income sourced to the old state (rental income, a part-year job, a business) after changing your domicile, you will likely need to file a nonresident return for that income.
Document everything. Keep a daily travel log. Save receipts, boarding passes, and credit card statements that show where you were on each day of the year. If your old state audits your departure, contemporaneous records are your strongest defense.

High-income individuals are more likely to be audited on residency claims. New York in particular has a dedicated unit that audits domicile changes for high earners. The bigger the tax savings from the move, the more scrutiny to expect.

No-income-tax states for snowbirds

The simplest solution for snowbirds is to establish domicile in a state with no individual income tax. These states cannot impose a state income tax on you regardless of how many days you spend there, because there is no state income tax to impose. As of 2026, states with no broad-based individual income tax include:

Alaska
Florida
Nevada
New Hampshire (taxes interest and dividends only on a phased-out basis; check current status)
South Dakota
Tennessee
Texas
Washington
Wyoming

Keep in mind that no income tax does not mean no taxes. Florida has a relatively high sales tax rate. Texas has property taxes that are among the highest in the nation. Evaluate the full tax picture before choosing a retirement or snowbird destination. Our retirement moving checklist walks through all the taxes to consider.

For state-by-state details on income tax rates, deductions, and retirement income treatment, visit our state tax directory.

Record-keeping and safe harbors

If you split your time between states, detailed records are not optional. A day-by-day log is the foundation. For each day, record:

Where you slept (city and state)
Any significant activities (work meetings, medical appointments, family events)
Mode of travel if you crossed state lines

Support the log with objective third-party evidence: airline boarding passes, hotel folios, E-ZPass records, credit card statements, and cell phone bills showing activity in a given location. If your log ever conflicts with objective evidence, the objective evidence wins.

Some states offer a safe harbor for people who are in the state only for temporary purposes, such as short-term employment. These provisions vary by state and generally do not apply to retirees who simply split their time. Review each state's specific rules.

Audit triggers to avoid

State revenue departments focus residency audits on situations where the tax savings from the claimed domicile change are large. Common triggers include:

Filing a final-year return in a high-tax state followed by no return in subsequent years
Continuing to work in the old state after claiming a domicile change
Keeping a large home in the old state while claiming a small apartment elsewhere as the primary residence
Children attending school in the old state
Medical providers, religious affiliation, and country club memberships remaining in the old state
Social media posts or publicly available records showing presence in the old state on days claimed to be spent elsewhere

Auditors look at the totality of your life connections (called "contacts") to each state. If most of your significant life activities still occur in the old state, the domicile claim is vulnerable regardless of the day count.

If you moved mid-year and need to understand how to file returns for both states, see Part-Year Resident Taxes: How Moving States Affects Your Return.

Frequently Asked Questions

What is the 183-day rule for state taxes?

The 183-day rule is a presence test used by many states to determine whether a person qualifies as a statutory resident for income tax purposes. If you spend 183 or more days in a state during the tax year, that state may tax your entire income as if you were a full-year resident, even if you consider another state your permanent home.

Does the 183-day rule apply in every state?

No. Not every state uses a 183-day threshold, and states that do use it may count days differently. Some states count partial days as full days. Some use 183 days, others use 183 days plus maintaining a permanent place of abode. Check the specific rules for each state you spend significant time in.

Can I be a tax resident of two states at the same time?

Yes, this is called dual residency. It happens when your domicile state considers you a resident and another state also claims you as a statutory resident due to the number of days you spent there. You would owe full-year taxes to both states, with credits potentially available to offset some of the overlap.

How do snowbirds avoid being taxed in two states?

The most reliable approach is to spend fewer than the threshold number of days in the high-tax state (often fewer than 183 days), change your domicile to the low-tax or no-tax state by taking concrete steps (new driver's license, voter registration, updated estate documents), and keep detailed travel logs to document the day count.

Does flying through a state count as a day of presence?

Transit days are not always free. Some states count any day you are present at midnight as a resident day. Others exempt travel-through days. New York, for example, has specific rules about whether transit days count. Check the rules for the specific state before assuming travel days are safe.

What records should I keep if I divide my time between two states?

Keep a contemporaneous day-by-day log of where you slept each night. Support it with credit card statements, hotel receipts, flight records, utility bills, and cell phone location data. Tax authorities can and do request these records during audits of high-income individuals who split their time between states.

If I move to Florida to avoid state income tax, do I still owe my old state?

If you successfully change your domicile to Florida before year-end and spend fewer than the statutory residency threshold of days in your old state, your old state generally can only tax income earned while you were a domiciliary there. The key is establishing Florida as your true domicile, not just having a Florida address.