Form 8843 Exempt Days and Medical Exceptions (2025-2026)
Treaty benefit source hierarchy
How to support a treaty position back to primary sources.
Treaty article
The specific U.S. income-tax treaty provision you rely on.
Internal Revenue Code
How U.S. law interacts with the treaty position.
Treasury regulations & guidance
How the IRS interprets and applies the rule.
Disclose on Form 8833
Report a treaty-based return position when required.
Key Takeaways
- Form 8843 applies to excluded days for specific reasons, not general residency preferences.
- The form can be used for exempt-individual days or medical inability to depart.
- Medical-condition claims need a fact-based record tied to actual dates.
- Date-specific support is the center of a strong Form 8843 file.
Form 8843 is about excluded presence days, not general tax residency preferences
Digital nomads sometimes hear about Form 8843 and assume it is a broad rescue form for anyone trying to avoid substantial presence. The IRS page is narrower. It says alien individuals file Form 8843 to explain the basis of a claim that days can be excluded from the substantial presence test because they were an exempt individual or were unable to leave the United States because of a medical condition or medical problem.
That is a targeted form for targeted facts.
The medical-condition route is not a lifestyle backup plan
The IRS language on Form 8843 makes clear that this is about being unable to leave the United States because of a medical condition or medical problem. It is not a general hardship form and it is not a substitute for poor travel planning. Founders should therefore keep medical support, travel disruption records, and the exact dates tied to the problem if they think excluded days may matter.
The facts have to show why departure was not possible.
The right filing file is built around dates and evidence
Whether the claim is based on exempt-individual status or medical inability to depart, the strongest Form 8843 file is date-specific. It should show the days present, the basis for exclusion, and any supporting institutional or medical records. Nomads who treat Form 8843 as something to look up at year-end often discover the core proof was never preserved when it actually mattered.
Excluded-day claims are strongest when they are documented contemporaneously.
Frequently Asked Questions
Can Form 8843 be used just because I do not want to meet substantial presence?
No. The IRS limits it to excluded-day claims for exempt-individual status or inability to leave because of a medical condition.
What kind of problem can support the medical-condition part of Form 8843?
The IRS says it applies when you were unable to leave the United States because of a medical condition or medical problem.
What matters most in a Form 8843 file?
The key items are the excluded dates and the evidence supporting why those dates qualify.
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