About this tool
The US Expat Tax Calculator estimates federal US tax for citizens and green-card holders living abroad in tax year 2025 (returns filed by April 15, 2026, automatic extension to June 15 for expats). It runs side-by-side the two main relief mechanisms - the Foreign Earned Income Exclusion (FEIE, $130,000 for 2025) and the Foreign Tax Credit (FTC) - and tells you which one minimises your liability.
It also flags self-employment tax (which FEIE does NOT eliminate) and state residency exposure, which is where a lot of expats get caught: California and New York frequently audit former residents who claim to have left.
How it works
- Enter your foreign earned income and days outside the US in the tax year.
- Pick the country (drives the typical foreign-tax-rate assumption for the FTC vs FEIE comparison) and enter your actual foreign tax paid if known.
- Set self-employed status, filing status, and state residency.
- The calculator pro-rates the $130,000 FEIE by your qualifying days and shows federal US tax under both FEIE and FTC, plus SE tax and state tax separately.
The formulas
FTC strategy: US federal tax on full income, then credit foreign tax (capped at US tax on foreign income)
SE tax = 15.3% on first $168,600 of net SE earnings (NOT reduced by FEIE)
Best strategy = min(FEIE result, FTC result) + SE tax + state tax
FEIE or FTC - which to pick?
The two are mutually exclusive for the same dollar of income. Pick FEIE when foreign tax rates are low; pick FTC when they're high. Rule of thumb:
| Country | Typical top rate | Usually better | Why |
|---|---|---|---|
| UK | 45% + 2% NI | FTC | UK tax already higher than US; FTC fully wipes US bill. |
| Germany | 45% + solidarity | FTC | High-tax country; FTC carries forward 10 years. |
| Australia | 45% + 2% Medicare | FTC | Generally a high-tax destination. |
| Canada | 33% federal + provincial | FTC | Combined provincial rates beat US. |
| UAE / Dubai | 0% personal | FEIE | No foreign tax to credit; FEIE just removes income. |
| Singapore | 22% top | FEIE usually | Lower than US bracket; FEIE removes more. |
| India | 30% + cess | Mixed | Run both - depends on your bracket vs US. |
The calculator above runs the math for you. One more wrinkle: once you elect FEIE on a given year, you cannot easily switch to FTC later without IRS permission (5-year lockout). Pick deliberately.
How the $130,000 Foreign Earned Income Exclusion actually works
FEIE is an exclusion, not a deduction or credit. Up to $130,000 of foreign earned income (wages, salary, professional fees) is simply removed from your gross income before the rest is taxed at ordinary US brackets. The exclusion is per qualifying person, so a married couple where both work and both qualify abroad can exclude up to $260,000 combined.
To qualify, you must have foreign earned income AND your tax home must be in a foreign country AND you must pass either the Physical Presence Test (330 days in 12 months) or the Bona Fide Residence Test. The exclusion is pro-rated by qualifying days when you don't have a full 12-month window - for example, 250 qualifying days yields $130,000 × 250/365 ≈ $89,041.
Housing exclusion - the bonus on top of FEIE
On top of FEIE, you can exclude (employees) or deduct (self-employed) qualified foreign housing costs above a base of $20,800 (16% of $130,000), up to a cap of $39,000 (30% of $130,000) for ordinary cost-of-living locations. High-cost cities (London, Tokyo, Singapore, Hong Kong, Dubai) get higher caps published annually in the Form 2555 instructions. This calculator uses the standard 16%-base assumption; if you're in a high-cost city, ask your CPA about a city-specific cap.
FTC mechanics - Form 1116 in 60 seconds
The Foreign Tax Credit reduces your US tax dollar-for-dollar by foreign income tax paid, up to a cap: (foreign income / total income) × US tax. If your foreign tax is higher than the cap (common in UK, Germany, Canada, Australia) you carry the excess forward 10 years. You file Form 1116 for general/passive/section 951A categories of income - they don't blend, so a CFO with $200K salary and $30K foreign dividends files two separate 1116s.
FTC is almost always the right answer for high-tax countries. The credit is uncapped (subject to that proportional limit), there's no 5-year lockout, and excess foreign tax banks for future years.
The state residency trap
Nine states have no personal income tax (in 2025): Florida, Texas, Tennessee, Washington, Nevada, New Hampshire (limited investment tax), South Dakota, Wyoming, Alaska. If your last US state was one of these, you have nothing to worry about. If it was California, New York, New Jersey, Massachusetts, Oregon, Illinois - they may continue to claim you as a resident based on "intent to return" tests.
Pre-departure checklist to break state residency:
- Change your driver's license to a no-tax state or surrender the CA/NY one.
- Re-register to vote in a different state (or just deregister).
- Sell or rent out (don't keep vacant) your former state home.
- Update your will, trust, and any homestead exemption to your new state.
- Move bank, brokerage, IRA "primary address" to a no-tax-state mailing service.
- File a final part-year resident return in the year of departure. Don't just stop filing.
Self-employment tax - the painful asterisk
If you're freelancing, consulting, or running a single-member LLC from abroad, you owe US SE tax: 12.4% Social Security on the first $168,600 of net earnings + 2.9% Medicare on all earnings + 0.9% additional Medicare above $200K single / $250K MFJ. FEIE does not touch this. You can excluded $130K of income for income-tax purposes and still owe 15.3% × $130K = $19,890 in SE tax.
The way out is a Totalization Agreement. The US has them with ~30 countries (UK, Canada, Australia, Germany, France, Japan, Korea, Brazil, Chile, others). If you pay into the host country's social system, request a Certificate of Coverage from them - this exempts you from US SE tax on the same earnings.
Compliance checklist for 2025 (filed 2026)
| Form | When required | Deadline |
|---|---|---|
| Form 1040 | Always (US citizens are taxed on worldwide income) | April 15 (auto-extension to June 15 for expats) |
| Form 2555 | Claiming FEIE | With your 1040 |
| Form 1116 | Claiming FTC over $300 (single) / $600 (MFJ) | With your 1040 |
| FinCEN 114 (FBAR) | Foreign accounts > $10,000 aggregate at any point | April 15 (auto-extension to October 15) |
| Form 8938 | Foreign assets > $200K single / $400K MFJ at year-end abroad | With your 1040 |
| Form 8621 | PFICs (foreign mutual funds, most non-US ETFs) | With your 1040 |
| Form 5471 / 8865 | Foreign corporation / partnership ownership | With your 1040 |
Common mistakes US expats make
- Counting partial days for the 330-day test. The IRS counts full UTC days outside the US. The day you fly out and the day you fly in are both partial - they don't count.
- Electing FEIE then revoking it casually. Once revoked, you can't claim FEIE again for 5 years without IRS permission. Pick deliberately.
- Putting passive income under FEIE. FEIE only covers earned income. Dividends, interest, rents, capital gains do NOT qualify. They go on FTC or are simply taxed.
- Forgetting state residency. Federal exclusion does nothing for your CA state tax bill. If you're still considered a CA resident, you owe CA tax on worldwide income.
- Owning local mutual funds (PFICs). The PFIC regime is punitive - every distribution and sale faces complicated mark-to-market or excess-distribution math. Hold US-domiciled ETFs through a US broker if you can.
- Missing FBAR. $10,000 minimum penalty for non-willful, $100K or 50% of account balance for willful. Use FinCEN's online form; it takes 10 minutes.
- Assuming the treaty saves you from filing. Tax treaties affect rates and source rules; US citizens still file 1040 every year regardless. There is no treaty that lets a US citizen stop filing.
When the calculator's estimate is not enough
This tool gives a starting estimate. Get a real expat CPA when any of these apply:
- You own a foreign business, foreign partnership, or hold foreign mutual funds (PFIC exposure).
- You have RSU / ISO / NSO vesting that crosses borders.
- You're considering renouncing US citizenship (exit tax planning is delicate).
- You've missed prior-year filings and need to use Streamlined Compliance.
- You have complex treaty positions (treaty tie-breaker for residency, treaty-based return positions, treaty source rules).
- Your spouse is a non-US citizen and you're choosing between MFJ election vs MFS.
Frequently asked questions
What is the 2025 FEIE limit?
$130,000 per qualifying person for the 2025 tax year (Rev. Proc. 2024-40). It rises with inflation each year. Married couples both abroad can each claim their own exclusion, for a combined $260,000.
Physical Presence Test or Bona Fide Residence Test - which should I use?
Physical Presence Test (PPT) requires 330 full days outside the US in any consecutive 12-month period. It is mechanical - count days. Bona Fide Residence (BFR) requires you to be a tax resident of a foreign country for an uninterrupted period including a full tax year, with intent to stay. PPT is easier in your first year abroad; BFR is more flexible once established (you can visit the US for longer).
Can I stack FEIE and Foreign Tax Credit on the same income?
No. You cannot claim FTC on income that you already excluded under FEIE - that would be double-dipping. You can use FEIE on the first $130,000 and FTC on income above that, or skip FEIE entirely and put everything under FTC (often better in high-tax countries like UK, Germany, Australia).
Do I still owe US self-employment tax living abroad?
Yes - FEIE does NOT reduce SE tax. As a self-employed expat you owe 15.3% (12.4% Social Security up to $168,600 + 2.9% Medicare unlimited) on net earnings unless a Totalization Agreement covers you. The US has agreements with the UK, Canada, Australia, Germany, and ~30 other countries - if you pay into their social system, file a Certificate of Coverage and you can be exempt from US SE tax.
What triggers a state residency audit (especially California and New York)?
California and New York are notoriously aggressive. Triggers: keeping a CA/NY driver's license, voting registration, owning property, having family there, holding a CA/NY business license, mail forwarding to a CA/NY address, or maintaining bank accounts as 'primary'. The safe-harbor route is to establish clear domicile in a no-tax state (FL, TX, NV) before leaving the US - change driver's license, voter registration, vehicle registration, will, and any homestead exemption.
Do I need to file FBAR and Form 8938?
FBAR (FinCEN 114): yes, if any foreign financial account or aggregate of accounts exceeded $10,000 at any point in the year. Filed separately from your tax return by April 15 (automatic extension to October 15). Form 8938 (FATCA): yes, if foreign assets exceeded $200,000 single / $400,000 MFJ at year-end while abroad (lower thresholds inside the US). Both are reporting-only - no tax owed - but penalties for missing them are severe ($10K minimum FBAR, $50K willful).
How do Totalization Agreements work?
A Totalization Agreement prevents you from paying social security tax in both countries. If you're a US citizen working in the UK for a UK employer, you pay UK National Insurance - and you get a Certificate of Coverage that exempts you from US Social Security/Medicare. Same for Australia (SG), Germany, Canada (CPP/EI). Without the agreement, you'd owe both - typically a 7.65 to 15.3% double tax.
What is the US exit tax / expatriation tax?
If you renounce US citizenship or give up a long-held green card AND you are a 'covered expatriate' (net worth $2M+, average tax liability over $206,000 for 2025, or non-compliance with 5 prior years' returns), you owe an exit tax on unrealized capital gains above an $890,000 (2025) exclusion. Most ordinary expats are NOT covered expatriates - but if your net worth is above $2M and you're considering renunciation, get pre-renunciation tax planning.