Meeting the US Substantial Presence Test does not have to make you a US tax resident. Spend fewer than 183 days in the US this calendar year, keep a tax home in another country with your life genuinely anchored there, and the closer connection exception - claimed on Form 8840 - lets the IRS treat you as a nonresident anyway. This guide covers who qualifies, the factors the IRS weighs, the June 15 deadline, and how to keep your day count provably under the line on your iPhone.
How the closer connection exception and Form 8840 work
The Substantial Presence Test makes you a US tax resident if you were in the US at least 31 days this year and your weighted three-year total reaches 183: all of this year's days, plus one-third of last year's, plus one-sixth of the year before. That formula catches people who never spend half a year in the US. Winter there roughly four months every year - about 122 days - and your weighted total lands on 183 exactly.
Congress built in a release valve: even if you meet the test, you can still be treated as a nonresident alien for the year by claiming the closer connection exception on Form 8840, the Closer Connection Exception Statement for Aliens - a short annual statement, not a tax return, that stands between you and US tax on worldwide income.
The three conditions you must meet
To claim the exception for a year, all three must be true:
- Fewer than 183 actual days in the US this year. This is the current calendar year on its own, not the weighted three-year total. Hit 183 real days and the exception is gone, whatever the formula says.
- A tax home in a foreign country for the entire year. Your tax home is the place where your main home and economic life sit, continuously available to you, not a short-stay arrangement.
- A closer connection to that country than to the US. You kept more significant contacts abroad than in the US. If you moved your tax home during the year, a two-country version can still work.
One hard disqualifier: the exception is not available if you applied for a green card, took other steps toward lawful permanent resident status, or have an adjustment-of-status application pending. The IRS reads that as intent to stay, and only a tax treaty can help.
What counts as a closer connection
Form 8840 is essentially a questionnaire about where your life happens. The IRS weighs, among other factors:
- where your permanent home, your family, and personal belongings such as cars and furniture are;
- where you hold a driver's licence and where you are registered to vote;
- where you do your banking and carry on business activities;
- your social, political, cultural and religious affiliations, and where you give to charity;
- the country of residence you claim on forms - a W-8BEN supports the claim, a W-9 undercuts it.
No single factor decides it. What matters is the overall picture, and consistency: claiming a closer connection to Canada while holding a Florida driver's licence and Florida voter registration invites questions.
The deadline: file Form 8840 by June 15
If you file a US nonresident return, attach Form 8840 to your 1040-NR. If not - the normal case for snowbirds with no US income - mail it on its own to the IRS service centre in Austin, Texas, by the date a 1040-NR would have been due:
- April 15 of the following year if you had US wages subject to withholding;
- June 15 of the following year if you did not - the usual snowbird deadline. For the 2025 tax year that was June 15, 2026; a weekend 15th rolls to the next business day.
The deadline has teeth. File late and you lose the exception for that year unless you can show clear and convincing evidence that you took reasonable steps to comply - a hard standard to meet after the fact.
Why Canadian snowbirds care so much
Immigration rules let Canadians visit for up to six months less a day, but the tax line arrives far sooner: a routine four-month winter repeated each year meets the Substantial Presence Test. Form 8840 keeps those winters from becoming US tax residency, which is why the Canadian Snowbird Association tells members wintering four months or more to file it annually.
Do not assume nobody is counting. Under the Canada-US entry/exit initiative, the two countries have shared land-border crossing records for all travellers since 2019, so both tax authorities can reconstruct your day count without your help. And if you reach 183 or more days in a single year, the exception closes entirely: the fallback is the Canada-US treaty tie-breaker (permanent home, centre of vital interests, habitual abode, citizenship), claimed on Form 8833 with a 1040-NR, best handled with a professional. See how treaty tie-breakers work.
Track your 8840 eligibility automatically
The whole exception hangs on one number - your current-year US day count - plus evidence to back it up. Tax Residency Tracker watches both for you:
- Automatic US day counting feeds the weighted Substantial Presence Test card, which shows the full breakdown - this year's days, one-third of last year's, one-sixth of the year before - alongside the 31-day check.
- The 183 current-year line is tracked with days remaining - exactly how much winter you have left before Form 8840 stops being an option.
- Threshold alerts warn you on a ladder at 90, 45, 21, 14, 7 and 3 days out, so you never blow the 183-day eligibility limit by accident.
- Dated location history with document attachments - boarding passes, receipts, scans - gives you the evidence trail if your count is ever challenged.
- CSV export hands your accountant a clean, dated record to prepare the 8840 from.
- Everything stays on your device, private by design, with no cloud collection.
Frequently asked questions
Do I have to file Form 8840 every year?
Yes. Eligibility is tested year by year, so file a fresh form for every year you meet the Substantial Presence Test. Most snowbirds simply file each June.
What happens if I file Form 8840 late?
You generally forfeit the exception for that year and can be taxed as a US resident, unless you can show clear and convincing evidence that you took reasonable steps to comply. Treat June 15 as immovable.
What is the difference between Form 8840 and Form 8843?
Form 8843 excludes days from the count for exempt individuals such as students and teachers on certain visas. Form 8840 accepts that you meet the test but claims nonresident treatment because your life is centred abroad.
Can I claim the exception with exactly 183 days in the US this year?
No. The exception requires fewer than 183 days of actual presence in the current year. At 183 or more, your only route to nonresident treatment is a tax-treaty tie-breaker claimed on Form 8833.
Next, run your numbers with the Substantial Presence Test guide, see how snowbirds manage a change of tax residency, learn the tax treaty tie-breaker rules, or browse all tax-residency guides.