How the US Expat Tax Calculator works

This US expat tax calculator estimates your 2025 federal income tax two ways. First, it applies the Foreign Earned Income Exclusion, removing up to $130,000 of foreign earned income before tax. Then, it models the Foreign Tax Credit, taxing your full income but offsetting the foreign tax you paid. Finally, it compares the two and shows which leaves you paying less. This side-by-side view is the single most useful decision an American abroad can make each year.

Crucially, the better method depends on your circumstances. In a high-tax country, the credit often wins outright. In a low-tax country, the exclusion usually does. For families, the choice also affects the refundable Child Tax Credit. Because the wrong choice can cost thousands, modelling both is not optional for serious planning.

The Foreign Earned Income Exclusion explained

The Foreign Earned Income Exclusion allows qualifying expats to exclude up to $130,000 of foreign earned income from US tax in 2025. To qualify, you need a tax home abroad and must meet either the Physical Presence Test of 330 full days outside the US, or the Bona Fide Residence Test of full-year residence. Only earned income qualifies, so salary and self-employment profit count, while pensions, dividends and rent do not.

Importantly, the exclusion does not reduce self-employment tax, and it interacts with your remaining income through the stacking rule. As a result, high earners frequently find that the exclusion alone leaves tax on the table. Understanding these limits is the first step to using it effectively.

The Foreign Tax Credit explained

The Foreign Tax Credit offsets foreign income tax against your US tax on a dollar-for-dollar basis. In high-tax countries, it usually eliminates your US liability entirely and can leave surplus credits to carry back one year or forward ten. Furthermore, unlike the exclusion, it generally preserves the refundable Child Tax Credit, which can be worth thousands to families. For these reasons, many higher-earning expats in countries like the UK rely on the credit.

Which method is right for you?

As a rule of thumb, the exclusion suits lower earners and residents of low-tax countries, while the credit suits higher earners and residents of high-tax countries. However, the reality is rarely that simple. Your income level, family situation, host-country tax rate, investment income and future plans all influence the answer. In addition, switching from the exclusion back to the credit can lock you out of the exclusion for five years, so the decision has long-term consequences.

Consequently, we model both routes carefully for every client, factoring in credits, carryforwards and future income. Small differences compound over the years, and getting the strategy right early avoids expensive corrections later.

Filing obligations beyond income tax

Reducing your tax to zero does not end your responsibilities. Most expats must also file the FBAR for foreign accounts over $10,000, and FATCA Form 8938 for larger foreign assets. These information returns carry severe penalties for non-compliance, entirely separate from any tax due. If you have fallen behind, the IRS Streamlined Filing Compliance Procedures often allow you to catch up penalty-free, which is a core part of our practice.

In summary, this calculator gives American expats a fast, practical comparison of the two main reliefs for 2025. Use it to understand your likely position, then let our specialist team confirm the optimal strategy and prepare a fully compliant return.

Common Questions

US Expat Tax Calculator — FAQs

What is the Foreign Earned Income Exclusion for 2025?

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The Foreign Earned Income Exclusion lets qualifying Americans abroad exclude up to $130,000 of foreign earned income from US tax for 2025. Only earned income such as salary and self-employment profit qualifies; investment income, pensions and rental income do not. The limit is indexed for inflation each year.

How do I qualify for the Foreign Earned Income Exclusion?

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You must have foreign earned income, a tax home abroad, and meet either the Physical Presence Test or the Bona Fide Residence Test. The Physical Presence Test requires 330 full days outside the US in a 12-month period. The Bona Fide Residence Test requires being a genuine resident of a foreign country for a full tax year.

Should I claim the FEIE or the Foreign Tax Credit?

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It depends on your host country. In low-tax countries, the Foreign Earned Income Exclusion often works best. In high-tax countries such as the UK, the Foreign Tax Credit usually eliminates more US tax and leaves credits to carry forward. Many higher earners are better off with the credit, and some combine both.

Do US expats still have to file a tax return?

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Yes. US citizens and green card holders must file annually based on citizenship, wherever they live, once income exceeds the filing threshold. Even if the FEIE or Foreign Tax Credit reduces your tax to zero, the return must still be filed, along with FBAR and FATCA forms where required.

Does the FEIE reduce my self-employment tax?

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No. The Foreign Earned Income Exclusion removes income from income tax, but it does not reduce US self-employment tax of 15.3%. Self-employed Americans abroad may avoid this through a Totalization Agreement if their country has one with the US, which shifts social security to the host country.

What is the stacking rule for the FEIE?

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When you exclude foreign income, your remaining income is taxed as if the excluded amount had still counted for determining your tax bracket. In other words, the exclusion does not push your other income into lower brackets. This calculator gives a close estimate; a full return applies the exact Foreign Earned Income Tax Worksheet.

Can married couples each claim the FEIE?

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Yes. If both spouses have foreign earned income and each qualifies, they can each exclude up to the full limit, giving a combined exclusion of up to $260,000 for 2025. Each spouse must independently meet the residence or physical presence test.

Does the FEIE cover my UK or foreign pension?

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No. Pensions, distributions and investment income are not earned income, so they fall outside the Foreign Earned Income Exclusion. These are usually handled through the Foreign Tax Credit and, where relevant, the tax treaty. Pension treatment is a frequent source of cross-border errors.

What happens if I earn more than the FEIE limit?

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Income above the exclusion limit remains subject to US tax, though the Foreign Tax Credit can offset foreign tax paid on that excess. Higher earners therefore often rely on a combination of the exclusion and the credit, or on the credit alone. Modelling both routes is essential to minimise tax.

Can I claim the Child Tax Credit as an expat?

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Often yes, but the Foreign Earned Income Exclusion can limit access to the refundable portion. Using the Foreign Tax Credit instead may preserve a larger refundable Child Tax Credit for qualifying families. This trade-off is one of the most valuable planning points for American families abroad.

What is the Physical Presence Test?

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The Physical Presence Test is met if you are physically present in a foreign country or countries for at least 330 full days during any 12-month period. Travel days and time in the US do not count. It is the most common way for newer expats to qualify for the exclusion.

Do I need to report foreign bank accounts?

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Yes. If your combined foreign accounts exceed $10,000 at any point in the year, you must file an FBAR. Higher thresholds trigger FATCA Form 8938 as well. These information returns carry heavy penalties for non-compliance, independent of any tax owed.

How accurate is this US expat tax calculator?

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It provides a strong estimate of federal income tax under the exclusion and the credit for salaried and self-employed income. It does not model state tax, the Net Investment Income Tax, the exact stacking worksheet, or investment income. For a precise figure, our advisers prepare your full return.

When is my US expat tax return due?

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Americans abroad receive an automatic extension to 15 June, with a further extension available to 15 October. However, any tax owed still accrues interest from 15 April. Filing early avoids surprises, especially where FBAR and FATCA deadlines also apply.

Should I use a specialist for my US expat taxes?

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For most expats, yes. The choice between the exclusion and the credit, the treatment of pensions and investments, and the information-return rules make expert help genuinely cost-effective. Specialist advice typically reduces tax and removes the risk of costly filing mistakes.

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