# How many days make you tax resident in United States? > How United States decides tax residency: 183 days Substantial Presence Test: you must be present at least 31 days during the current calendar year AND reach a weighted total of 183 days over a three-year period, counting all the days present in the current year, 1/3 of the days present in the first year before the current year, and 1/6 of the days present in the second year before the current year., the tax year (1 January – 31 December), the tests that catch you regardless of days, and Internal Revenue Service (IRS)'s own page — checked 2026-08-18. Source: https://doastretch.com/tax-days/united-states/ United States · tax residency · 2026 183 days Tax residency threshold checked 2026-08-18 · irs.gov 183 days Substantial Presence Test: you must be present at least 31 days during the current calendar year AND reach a weighted total of 183 days over a three-year period, counting all the days present in the current year, 1/3 of the days present in the first year before the current year, and 1/6 of the days present in the second year before the current year. makes you tax resident in United States — but the day count is only the test people know about. Next step **How we know** Figures are as Internal Revenue Service (IRS) publishes them at irs.gov, checked 18 August 2026. Sources are listed further down the page. ## How the counting works US citizens and green-card holders are taxed on worldwide income no matter where they live: the IRS states you are 'subject to tax on worldwide income from all sources and must report all taxable income and pay taxes according to the Internal Revenue Code'. Leaving the country does not end the filing obligation. Days that do NOT count toward the substantial presence test: days commuting to work in the US from a residence in Canada or Mexico; days in the US for less than 24 hours while in transit between two places; days as a crew member of a foreign vessel; days you could not leave because of a medical condition that developed while in the US; and days as an exempt individual (foreign government officials, teachers, trainees, students on certain visas, professional athletes competing in charitable events). Citizens and resident aliens living abroad get an automatic 2-month filing extension to 15 June, but interest still accrues from 15 April. Failure to file Form 8840 on time generally forfeits the closer connection exception unless reasonable efforts to comply can be shown by clear and convincing evidence. ## Why the day count is the part you can control Ties, homes and intentions are argued after the fact; days are a record. That is why the first thing an adviser asks for is a list of the days you were in the country — and why reconstructing it from boarding passes and photos a year later is a bad afternoon. Log each stay as it happens and the tally is simply there, with the dates that produced it. ## Sources - [irs.gov](https://www.irs.gov/individuals/international-taxpayers/substantial-presence-test) — official source, checked 2026-08-18 - [irs.gov](https://www.irs.gov/individuals/international-taxpayers/conditions-for-a-closer-connection-to-a-foreign-country) (official), retrieved 2026-08-18 - [irs.gov](https://www.irs.gov/individuals/international-taxpayers/foreign-earned-income-exclusion-physical-presence-test) (official), retrieved 2026-08-18 - [irs.gov](https://www.irs.gov/individuals/international-taxpayers/determining-an-individuals-tax-residency-status) (official), retrieved 2026-08-18 - [irs.gov](https://www.irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad) (official), retrieved 2026-08-18 ## Questions people ask about United States tax residency **How many days can you spend in United States before becoming tax resident?** 183 days Substantial Presence Test: you must be present at least 31 days during the current calendar year AND reach a weighted total of 183 days over a three-year period, counting all the days present in the current year, 1/3 of the days present in the first year before the current year, and 1/6 of the days present in the second year before the current year. makes you tax resident in United States, and residents are taxed on worldwide income. Days are not the only route in: Green card test: a lawful permanent resident at any time during the calendar year is a resident alien. Closer connection exception: a person who was present in the United States fewer than 183 days during the year, maintains a tax home in a foreign country and has a closer connection to that country may be treated as a nonresident by filing Form 8840; it is unavailable to anyone who applied or took steps during the year to become a Lawful Permanent Resident, or who had an adjustment-of-status application pending (Forms I-485, I-130, I-140, ETA-750, OF-230, I-508). Tax treaties can override both the green card test and the substantial presence test. A person can be both nonresident and resident in the same year (dual-status), usually in the year of arrival or departure, and files a dual-status return. Checked 18 August 2026 against irs.gov. **When is United States's tax year?** 1 January – 31 December. Day counts are measured against that year unless the rule names a different period — here, Substantial Presence Test: you must be present at least 31 days during the current calendar year AND reach a weighted total of 183 days over a three-year period, counting all the days present in the current year, 1/3 of the days present in the first year before the current year, and 1/6 of the days present in the second year before the current year.. **Are residents of United States taxed on worldwide income?** Yes — once you are tax resident in United States, worldwide income falls in scope, subject to double-tax treaties. No remote-worker or digital-nomad tax regime. The Foreign Earned Income Exclusion (Form 2555) is the main relief for Americans living abroad: its physical presence test is met if you are 'physically present in a foreign country or countries 330 full days during any period of 12 consecutive months including some part of the year at issue'. The 330 days need not be consecutive and the 12-month window can start on any day, so a taxpayer may pick the most favourable window. Days over international waters while travelling between locations do not count, nor does time spent in a foreign country in violation of US law. A bona fide residence test is the alternative route. **Is there a special tax regime for people moving to United States?** No remote-worker or digital-nomad tax regime. The Foreign Earned Income Exclusion (Form 2555) is the main relief for Americans living abroad: its physical presence test is met if you are 'physically present in a foreign country or countries 330 full days during any period of 12 consecutive months including some part of the year at issue'. The 330 days need not be consecutive and the 12-month window can start on any day, so a taxpayer may pick the most favourable window. Days over international waters while travelling between locations do not count, nor does time spent in a foreign country in violation of US law. A bona fide residence test is the alternative route. Conditions and time limits apply; the official page below is the place to check them. **How does Stretch count tax days for United States?** Every stay you log feeds the tally: Stretch counts the days you were present against the 183-day threshold in the right window, so "how long was I actually there?" is answered before your accountant asks. Tax-day tallies are part of Stretch+; the day counter and the alerts are free forever. 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Checked 2026-08-18; confirm on the official page before you apply or file.