Tax Residency & FEIE 330-Day Tracker
Scan every consecutive 365-day window across calendar years to maximize Form 2555 physical presence days, toggle the IRS 24-hour international transit rule, and check US SPT & 183-day thresholds.
- No GPS tracking or cloud accounts — your travel log stays strictly in your browser localStorage.
- No account, no email
- CSV export
Window optimizer
Scanned 1,005 consecutive 365-day windows (2 May 2023 → 30 Jan 2026)
Target tax year & travel log
Default multi-country nomad itinerary pre-loaded — add or edit legs below
Three Cross-Border Tax Rules Explained
1. US FEIE Physical Presence Test (Form 2555): You must spend at least 330 full 24-hour days (midnight to midnight) physically inside foreign countries during any consecutive 365-day period. Under strict IRS Publication 54 rules, days spent in international airspace or transiting for less than 24 hours do not count as full days.
2. US Substantial Presence Test (SPT): Non-citizens become US tax residents if present in the US at least 31 days in Y0 AND their 3-year weighted total Days(Y0)×1 + Days(Y0−1)×1/3 + Days(Y0−2)×1/6 ≥ 183.
3. Statutory 183-Day Rule: Most countries trigger local tax residency once you spend 183 or more days within their borders in a calendar year.
Result · 2025 Tax Residency & FEIE Verdict
Optimal window: 1 Jan 2025 → 31 Dec 2025
| Year | Full days (Foreign / US) | Half / transit days | Weighted (1, 1/3, 1/6) | SPT triggered? |
|---|---|---|---|---|
| 2023 | 0d foreign · 28d US | 2d | 5.0d (30d × 1/6) | No (30.0 / 183) |
| 2024 | 47d foreign · 33d US | 3d | 12.0d (36d × 1/3) | No (46.0 / 183) |
| 2025 (Target Y0) | 344d foreign · 9d US | 9d | 18.0d (18d × 1) | No (35.0 / 183) |
| 2025 3-Yr SPT Total | 18d US in 2025 (<31d exempt) | 3d intl transit | 35.0 / 183.0d | No · Below 183 SPT |
Per-country 183-day threshold tracker (2025)
Bars show days spent in target tax year vs 183-day statutory limit
Form 2555 daily physical presence audit log
Day-by-day verification across optimal 365-day window (1 Jan 2025 → 31 Dec 2025)
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What people hate about the other tools
We read the reviews of the incumbents before writing this page. Every complaint below maps to a decision in the tool above.
For example, in one year I lived in the UK (April 6 to April 5 tax year) and Australia (July 1 - June 30) plus have to file in US (calendar year) as a citizen.
In this toolTracks US calendar year, rolling 365-day FEIE windows, UK Apr–Apr, and AU Jul–Jun tax years from one log.Since the test works on any consecutive 12-month period, not just the calendar year, you can drag a fixed 365-day lens across a 3-year track...
In this toolProvides a draggable 365-day window lens and auto-finder to maximize pro-rated Form 2555 exclusion days.Was out of US for 331 days last year. Now what? FEIE. Tax.
In this toolApplies IRS Publication 54 full 24-hour rules to flag partial arrival/departure days and US transit layovers.
One-line difference: Zero-signup tracker uniting sliding 365-day FEIE optimization, IRS 24h transit rules, US SPT, and multi-country 183-day caps.
Free forever, Pro when you need the paperwork
Free no signup, no card
- Interactive 365-day sliding lens & auto-optimizer for 330-day FEIE
- IRS midnight-to-midnight partial travel & US layover day deduction
- Simultaneous US SPT 3-year weighted test & 183-day country alerts
Pro $9 once
- Audit-ready Form 2555 & multi-country PDF/CSV report with flight refs
- Non-calendar fiscal year templates (UK Apr 6–Apr 5, AU Jul 1–Jun 30)
- Multi-scenario future travel what-if sandbox comparisons in browser
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