Do Dual Citizens Have to Pay Taxes in Both Countries?

Yes — if you hold U.S. citizenship and citizenship in another country, you have a tax filing obligation in both places, and dual citizens generally do pay taxes in both countries in the sense that returns are due in both. What you actually owe is a different question. The United States lets you offset foreign taxes you’ve already paid and exclude a large slice of foreign earnings from U.S. tax, so for most dual citizens living abroad, the U.S. bill ends up at or near zero even though the return still has to be filed.

Why the U.S. Still Wants a Return From You

Most countries tax people based on residence. The United States is one of only two countries — the other is Eritrea — that taxes based on citizenship. A U.S. citizen’s global income is reportable to the IRS whether you live in Tokyo, Toronto, or Topeka.¹ Natural-born citizens, naturalized citizens, and dual citizens are all treated the same way.

The filing requirement kicks in once your gross worldwide income crosses a minimum threshold that depends on filing status. For the 2026 tax year, a single filer under 65 must file at $16,100 of gross income; a married couple filing jointly with both spouses under 65 must file at $32,200.² You have to file even if you expect to owe nothing after applying credits and exclusions. Report first, then calculate what’s actually owed.³

Your country of residence, meanwhile, almost certainly taxes you on the income you earn there under its own rules. So there are two returns. The question of whether the same dollar gets taxed twice is what the next section answers.

How To Avoid Paying Twice on the Same Income

The U.S. gives you three tools to keep the same income from being taxed on both sides: the Foreign Tax Credit, the Foreign Earned Income Exclusion, and tax treaties. Most dual citizens abroad use one, or a combination, to bring the U.S. bill down to zero or close to it. Which one works best depends on where you live and what you earn.

Foreign Tax Credit

The Foreign Tax Credit lets you subtract foreign income taxes you’ve already paid from your U.S. tax bill, dollar for dollar. Pay $15,000 in income tax to France on your French salary, and you can reduce your U.S. tax on that same income by $15,000. It’s claimed on Form 1116.⁴

The credit can’t exceed the U.S. tax you would have owed on that foreign income, but if you live in a country with higher tax rates than the U.S., it typically covers your entire U.S. liability on those earnings. Unused credit can be carried back one year or forward up to ten.⁵ The credit works on wages, investment earnings, and rental income, as long as you paid a qualifying foreign income tax on it. That breadth makes it the default choice for dual citizens in high-tax countries like Germany, France, or Canada.

Foreign Earned Income Exclusion

The Foreign Earned Income Exclusion (FEIE) takes a different route. Rather than crediting foreign taxes paid, it lets you exclude a chunk of foreign earnings from U.S. taxable income altogether. For 2026, the maximum exclusion is $132,900 per person.² Two working spouses who both qualify can exclude up to $265,800 combined. You claim it on Form 2555.

The exclusion applies only to earned income: wages and self-employment profits. Investment income, rental income, pensions, and dividends don’t qualify. To be eligible you need a tax home in a foreign country and must pass one of two tests:⁶

The bona fide residence test: you’re a resident of a foreign country for an uninterrupted period that includes a full tax year.
The physical presence test: you’re physically present in one or more foreign countries for at least 330 full days during any 12 consecutive months.

You can also exclude or deduct certain foreign housing costs on top of the income exclusion. For 2026 the base housing exclusion caps at $39,870, with higher limits published for expensive cities.⁶

Choosing Between the Credit and the Exclusion

You can use the Foreign Tax Credit and the FEIE in the same tax year, but not on the same income. A common approach is to exclude the first $132,900 of earned income with the FEIE and then claim the Foreign Tax Credit on income beyond that. You can’t claim the credit for foreign taxes paid on income you’ve already excluded.

The FEIE tends to win in a low-tax or no-tax country, where you aren’t generating much foreign tax to credit anyway. The Foreign Tax Credit tends to win in a high-tax country, because the credit can offset all your U.S. liability and roll forward any excess. One wrinkle: electing the FEIE can disqualify you from certain refundable credits, including the Additional Child Tax Credit, so families with children should compare both approaches before committing.

Tax Treaties

The United States has income tax treaties with dozens of countries, and these can layer benefits on top of the credit and exclusion. Treaties often carry specific rules for pensions, royalties, and capital gains, and their “tie-breaker” provisions can determine which country gets the primary right to tax you, typically by looking at where your permanent home and closer personal and economic ties are. If you claim a treaty benefit that reduces your U.S. tax, you generally have to disclose that position by filing Form 8833 with your return.⁷ Skipping the form doesn’t void the treaty benefit itself but can trigger a separate penalty.

Social Security Is a Separate Question

Income tax is one layer. Social Security and Medicare are another. Without special rules, a self-employed U.S. citizen abroad would owe U.S. self-employment tax of 15.3% covering Social Security and Medicare, even while paying into their other country’s social system.

To fix that, the United States has bilateral Social Security agreements — called totalization agreements — with 29 countries. Under these, you pay into only one country’s system.⁸ They also let you combine work credits from both countries toward benefits you might not otherwise qualify for. The list covers most of Western Europe, Australia, Japan, South Korea, Brazil, Chile, and Uruguay, among others.⁹ If your other country of citizenship isn’t on the list, you can end up paying social security taxes to both governments. Note that the FEIE and Foreign Tax Credit reduce income tax only; they don’t touch Social Security or Medicare tax.

Reporting Foreign Accounts and Assets

Alongside the tax return, U.S. dual citizens face separate reporting obligations tied to foreign financial accounts and assets. These are informational filings, not tax payments, but the penalties for missing them are severe enough that they deserve as much attention as the return itself.

FBAR

If the combined value of all your foreign financial accounts exceeds $10,000 at any point during the year, you must file FinCEN Form 114, the FBAR. You add up the highest balance in each account across the year; if the total crosses $10,000 even briefly, every account has to be reported.¹⁰ The FBAR is filed electronically through FinCEN’s system, separately from your tax return.

Penalties for skipping it are disproportionately large. A non-willful violation can cost up to $16,536 per account, per year. A willful violation runs to the greater of $165,353 or 50% of the account balance, plus possible criminal prosecution.¹¹ These figures are adjusted annually for inflation.¹² For a dual citizen with ordinary checking and savings accounts abroad, that $10,000 threshold is easy to hit without noticing.

Form 8938 (FATCA)

Separately from the FBAR, the Foreign Account Tax Compliance Act requires you to report specified foreign financial assets on Form 8938, attached to your tax return. Thresholds are higher than the FBAR and depend on where you live:¹³

Single filer living abroad: file if foreign assets exceed $200,000 on the last day of the year or $300,000 at any point.
Married filing jointly from abroad: file if foreign assets exceed $400,000 on the last day of the year or $600,000 at any point.

Form 8938 covers a broader range of assets than the FBAR, including foreign stock, securities, financial instruments, and interests in foreign entities. Failing to file triggers a $10,000 penalty, which can grow by $10,000 for every 30 days of continued non-compliance after IRS notice, up to an additional $50,000. If undisclosed foreign assets lead to a tax understatement, a separate 40% accuracy penalty applies.¹³

A Warning About Foreign Mutual Funds

One trap catches many dual citizens off guard. If you hold shares in a foreign mutual fund, ETF, or similar pooled investment through a brokerage or retirement account in your other country, the IRS likely treats it as a Passive Foreign Investment Company (PFIC). PFICs face punitive treatment: gains and certain distributions are taxed at the highest marginal rate, plus an interest charge that compounds for each year the investment was held.¹⁴ Each PFIC is reported separately on Form 8621. Elections exist to soften the tax hit, but the practical result is that ordinary index funds held in a foreign brokerage can trigger complicated and expensive U.S. tax consequences that wouldn’t apply to the same fund held through a U.S. brokerage.

Deadlines When You Live Abroad

Living abroad gets you more time to file, but not more time to pay. For the 2026 filing cycle covering the 2025 tax year:

April 15, 2026: regular filing deadline. Any U.S. tax owed is due by this date. Interest starts running on unpaid balances after it.
June 15, 2026: automatic two-month extension for U.S. citizens whose tax home and primary residence are outside the United States. No form required. Filing only — payment was still due April 15.
October 15, 2026: further extension available by filing Form 4868. This is also the final FBAR deadline, extended automatically from April 15.¹⁵

The most common mistake here is assuming the June or October extension pushes back your payment deadline. It doesn’t. If you owe U.S. tax and don’t pay by April 15, interest and potentially late-payment penalties apply even before your return is due.

If You Are Years Behind on Filing

Many dual citizens learn about their U.S. filing obligations well after they should have started. The IRS runs programs to bring you back into compliance without automatic penalties, as long as your failure to file wasn’t intentional.

The Streamlined Foreign Offshore Procedures are aimed at U.S. taxpayers living outside the country who can certify that their failure to report foreign income and assets was non-willful — negligence, mistake, or a good-faith misunderstanding of the rules. You file three years of delinquent tax returns and six years of FBARs, with no penalties on the late FBARs and a reduced penalty structure overall.¹⁶

If your only miss was the FBAR and your foreign income was properly reported and taxed, the Delinquent FBAR Submission Procedures are simpler. You file the late FBARs through FinCEN, and the IRS won’t impose penalties as long as you haven’t already been contacted about them.¹⁷ Neither program is available once you’re under IRS examination or criminal investigation.

Don’t Forget State Taxes

Federal is only one layer. Depending on which U.S. state you last lived in before moving abroad, you may still owe state income tax. Nine states have no income tax at all, so former residents of those states have no state filing obligation. The rest vary widely in how aggressively they hold onto former residents.

A handful of states presume you remain a tax resident until you establish a new domicile in another U.S. state. Move directly from one of these to a foreign country without first establishing residence in another state, and the original state can keep taxing your worldwide income. California and Virginia are particularly well known for this position. Even states that do release you may still tax income sourced within their borders, such as rental income from property you own there. If your last state has an income tax, review its rules for breaking residency before assuming you’re free of it.

1
Internal Revenue Service. U.S. Citizens and Resident Aliens Abroad
2
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
3
Internal Revenue Service. U.S. Citizens and Residents Abroad – Filing Requirements
4
Internal Revenue Service. Foreign Tax Credit
5
Internal Revenue Service. Foreign Tax Credit – How To Figure the Credit
6
Internal Revenue Service. Figuring the Foreign Earned Income Exclusion
7
Internal Revenue Service. About Form 8833, Treaty-Based Return Position Disclosure
8
Social Security Administration. International Agreements
9
Social Security Administration. Country List 3
10
Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts
11
FinCEN. BSA Electronic Filing Requirements for FinCEN Form 114
12
Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
13
Internal Revenue Service. Instructions for Form 8938
14
IRS. Instructions for Form 8621
15
Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
16
Internal Revenue Service. Streamlined Filing Compliance Procedures
17
Internal Revenue Service. Delinquent FBAR Submission Procedures