How to Handle a Cross-Border Tax Situation

The United States is one of only two countries in the world that taxes its citizens on worldwide income regardless of where they live. The other is Eritrea. This means a US citizen living in Tokyo, London, or Buenos Aires must file a US tax return every year, reporting all income, even if none of it is earned in the US.

In 2026, the IRS is using AI and data matching to identify non-filers abroad. The IRS receives data from foreign governments through FATCA (Foreign Account Tax Compliance Act), from foreign banks, and from employers. The AI is highly effective at comparing reported information with third-party data. The IRS is explicitly focusing on identifying Americans who should be filing but are not.

The penalties for non-compliance are severe. FBAR non-willful violations can result in penalties up to $10,000 per violation. Willful violations can result in the greater of $100,000 or 50% of the account balance. FATCA non-compliance can result in $10,000 per year, up to $50,000.

But the system also provides tools to avoid double taxation. The Foreign Earned Income Exclusion (FEIE) allows excluding up to $130,000 of foreign earned income in 2025 (filed in 2026), according to the IRS Form 2555 instructions. For tax year 2026, the exclusion increases to $132,900. The Foreign Tax Credit (FTC) provides a dollar-for-dollar credit for income taxes paid to a foreign government. And tax treaties between the US and 60+ countries provide additional relief.

If you are searching for how to handle a cross-border tax situation, this guide covers the filing requirements, the FEIE vs FTC decision, FBAR and FATCA reporting, and how to get compliant if you have not been filing.

Who Must File

US citizens and dual citizens

Must file a US tax return if income exceeds the filing threshold ($14,600 single, $29,200 married filing jointly in 2025). Must file regardless of where they live or where income is earned. Citizenship-based taxation means renouncing citizenship does not immediately relieve the obligation (expatriation tax rules apply).

Green card holders (lawful permanent residents)

Treated as US tax residents for as long as they hold a green card. Must report worldwide income. Even if living abroad, must file US returns.

Substantial presence test (foreign nationals in the US)

Present in the US for at least 31 days in the current year and 183 days over 3 years (current year plus 1/3 of prior year plus 1/6 of year before). If you meet the test, you are a US tax resident and must report worldwide income. Exceptions: treaty-based residency, F, J, M, or Q visa holders.

The Foreign Earned Income Exclusion (FEIE)

What it is

The FEIE excludes up to $130,000 of foreign earned income from US taxation for the 2025 tax year (filed in 2026), per the IRS foreign earned income exclusion page. For tax year 2026, the exclusion increases to $132,900. It is claimed on Form 2555. Only applies to earned income (salary, wages, self-employment). Not passive income (dividends, interest, capital gains).

How to qualify

• Physical Presence Test: physically present in a foreign country for 330 full days during any 12 consecutive months.
• Bona Fide Residence Test: bona fide resident of a foreign country for an uninterrupted period including an entire tax year.

How it works

If you earn $100,000 abroad and qualify for FEIE: $0 US tax on that income. If you earn $150,000 abroad: $130,000 excluded, $20,000 subject to US tax. Married couples: each spouse can claim FEIE if both qualify. Combined exclusion: $260,000 for 2025.

The Foreign Tax Credit (FTC)

What it is

A dollar-for-dollar credit for income taxes paid to a foreign government. Claimed on Form 1116. Reduces US tax liability by the amount of foreign tax paid.

FEIE vs FTC

FEIE excludes income from US taxation entirely. Best for lower-income expats in low-tax countries. FTC credits foreign taxes paid against US tax liability. Best for higher-income expats in high-tax countries. You can use both, but not on the same income. If you exclude income under FEIE, you cannot claim FTC on that excluded income. The safest approach is to run the return both ways and choose the better option.

FBAR and FATCA Reporting

FBAR (FinCEN Form 114)

Required if the aggregate foreign account balance exceeded $10,000 at any point during the year. Filed electronically through FinCEN's BSA E-Filing System. The deadline is April 15 with an automatic extension to October 15, no request needed, per the IRS FBAR page. Non-willful violations: up to $10,000 per violation. Willful violations: greater of $100,000 or 50% of account balance.

FATCA (Form 8938)

Required if foreign assets exceed thresholds:

• Single living in US: $50,000 year-end or $75,000 at any point
• Married filing jointly living in US: $100,000 year-end or $150,000 at any point
• Single living abroad: $200,000 year-end or $300,000 at any point
• Married filing jointly living abroad: $400,000 year-end or $600,000 at any point

Filed with the tax return (Form 1040). Non-compliance: $10,000 per year, up to $50,000.

The difference

FBAR is filed with FinCEN, has a $10,000 threshold, and covers all foreign accounts. FATCA is filed with the IRS on Form 8938, has higher thresholds, and covers foreign financial assets. You may need to file both. FBAR and FATCA are separate requirements.

Getting Compliant After Non-Filing

The Streamlined Filing Compliance Procedures

For non-willful non-filers (did not know they had to file):

• Streamlined Foreign Offshore Procedures (for non-US residents): file 3 years of tax returns, 6 years of FBARs, no penalties.
• Streamlined Domestic Offshore Procedures (for US residents): file 3 years of returns, 6 years of FBARs, 5% miscellaneous offshore penalty on highest year-end account balance.

The importance of acting before the IRS contacts you

Voluntary disclosure before IRS contact generally results in lower penalties. Once the IRS contacts you, options are more limited and penalties are higher. Consult a cross-border tax professional before filing.

FEIE vs FTC: Which Is Better?

Three Real Cross-Border Tax Scenarios

Example 1: US citizen teaching in Japan, $65,000 income

A US citizen teaching English in Japan earns $65,000 per year. Japan taxes her income at approximately 20% effective rate ($13,000). She qualifies for FEIE (330+ days abroad).

Strategy: FEIE excludes $65,000 from US tax. US tax on $65,000 would be approximately $8,800. With FEIE: $0 US tax. She still pays $13,000 to Japan. Total tax: $13,000.

Without FEIE: $8,800 US tax plus $13,000 Japan tax equals $21,800. But FTC would credit $8,800 against US tax (limited to US tax on foreign income). With FTC: $0 US tax. Same result.

The lesson: in low-income, moderate-tax situations, FEIE and FTC produce similar results. FEIE is simpler (just exclude). FTC requires Form 1116 but preserves the ability to carry forward excess credits. For understanding tax brackets and worldwide income, read our guide on what is inflation really.

Example 2: US citizen software engineer in Germany, $180,000 income

A US citizen working as a software engineer in Germany earns $180,000. Germany taxes him at approximately 42% effective rate ($75,600).

FEIE strategy: excludes $130,000. Remaining $50,000 subject to US tax at approximately $7,500. FTC on the $50,000: German tax on $50,000 is approximately $21,000. FTC credit: $7,500 (limited to US tax on that income). US tax after FTC: $0. Total tax: $75,600 to Germany plus $0 to US equals $75,600.

Alternative (FTC only, no FEIE): US tax on $180,000 is approximately $38,000. FTC: $38,000 (German tax of $75,600 exceeds US tax of $38,000). US tax after FTC: $0. Excess FTC: $37,600 carried forward 10 years. Total tax: $75,600 to Germany plus $0 to US equals $75,600.

Same result, but FTC-only preserves the $37,600 carryforward for future years.

The lesson: in high-income, high-tax situations, FTC-only may be better because it preserves carryforward credits. Run both scenarios. For investing while abroad, read our guide on how to set up automatic investing.

Example 3: US citizen in UAE, $120,000 income, zero local tax

A US citizen living in the UAE (no income tax) earns $120,000. UAE income tax: $0.

FEIE: excludes $120,000 from US tax. US tax: $0. Total tax: $0.

FTC: $0 foreign tax paid, so $0 credit. US tax without FEIE: approximately $18,000. With FTC: $18,000 (no foreign tax to credit against it).

The lesson: in zero-tax countries, FEIE is essential. Without it, you pay full US tax with no foreign tax to credit against it. Always use FEIE in zero-tax jurisdictions (UAE, Saudi Arabia, Cayman Islands, Bermuda, Bahamas). For audit defense strategies, read our guide on what to do if the IRS audits you. For tax debt management, read our guide on what to do if your business fails and you owe taxes.

Common Mistakes

Not filing at all. US citizens abroad must file. The IRS is using AI and FATCA data to find non-filers. Penalties are severe.

Not filing FBAR. The $10,000 threshold is aggregate (all foreign accounts combined). Even a small account counts. Non-willful penalty: up to $10,000 per violation.

Confusing FBAR and FATCA. They are separate requirements with different thresholds and different filing agencies. You may need both.

Not qualifying for FEIE before claiming it. The Physical Presence Test requires 330 full days abroad. The Bona Fide Residence Test requires an entire tax year. Do not claim FEIE if you do not meet the test.

Using FEIE when FTC is better. In high-tax countries, FTC may preserve carryforward credits. Run both scenarios.

Not filing FBAR on time. The deadline is April 15 with automatic extension to October 15. No extension request needed. But do not miss October 15.

Ignoring state tax obligations. Some states (California, Virginia, South Carolina, New Mexico) continue to tax residents even after they move abroad. Check your state's rules.

Not reporting foreign accounts on FATCA Form 8938. Thresholds are higher than FBAR ($200,000 for single expats) but the penalty is $10,000 per year.

Waiting for the IRS to contact you. Voluntary disclosure through Streamlined Procedures before IRS contact generally results in no or lower penalties.

Not using a cross-border tax professional. Cross-border taxes are complex. A specialist can optimize FEIE vs FTC, ensure FBAR and FATCA compliance, and handle Streamlined Procedures. For values-based planning abroad, read our guide on how to set financial goals that align with what you actually care about.

File, Report, and Get Compliant

Handling a cross-border tax situation requires understanding three systems: US filing obligations, foreign tax credits, and reporting requirements. US citizens and green card holders must file US returns on worldwide income regardless of where they live. The FEIE excludes up to $130,000 of foreign earned income for 2025 (filed in 2026), increasing to $132,900 for tax year 2026, if you meet the Physical Presence Test (330 days abroad) or Bona Fide Residence Test. The FTC provides a dollar-for-dollar credit for foreign income taxes paid. You can use both but not on the same income. Run both scenarios and choose the better option.

FBAR (FinCEN Form 114): required if foreign accounts exceed $10,000 aggregate. Deadline April 15, automatic extension to October 15. Non-willful penalty: up to $10,000. Willful: greater of $100,000 or 50% of balance. FATCA (Form 8938): higher thresholds ($200,000 single expat year-end, $400,000 married filing jointly). Penalty: $10,000 per year up to $50,000. Getting compliant: Streamlined Foreign Offshore Procedures (non-US residents, no penalties) or Streamlined Domestic Offshore Procedures (US residents, 5% penalty). Act before the IRS contacts you.

The IRS is using AI and FATCA data to identify non-filers in 2026. The risk of detection is higher now than ever before. The good news is that the system provides tools to avoid double taxation. The FEIE excludes $130,000 of foreign income. The FTC credits foreign taxes paid. Streamlined Procedures allow non-willful non-filers to catch up without penalties (if abroad) or with a reduced 5% penalty (if in the US). But these options are only available before the IRS contacts you.

Do three things this month. Determine if you qualify for the FEIE: were you physically present in a foreign country for 330 full days in any 12 consecutive months? Or are you a bona fide resident of a foreign country? Check if you need to file FBAR: did the aggregate balance of all foreign accounts exceed $10,000 at any point during the year? If yes, file FinCEN Form 114 by October 15. If you have not been filing US taxes while abroad, consult a cross-border tax professional about the Streamlined Filing Compliance Procedures. Act before the IRS contacts you.

Cross-border taxes are complex, but the rules are navigable with the right help. The most important thing for US citizens abroad to understand is that you cannot ignore US taxes. The IRS is catching up. FATCA data from foreign governments, AI-powered data matching, and a focus on non-filers mean that the risk of detection is higher in 2026 than ever before. If you have not been filing, consult a cross-border tax professional and use the Streamlined Procedures. If you are filing, make sure you are optimizing FEIE vs FTC and filing FBAR and FATCA as required.

This post is for informational purposes only and does not constitute tax or legal advice. Cross-border tax rules are complex and subject to change. Consult a qualified cross-border tax professional before making decisions about international tax compliance.