Form 1116
Updated on April 07, 2026
by Rose-ann De Villa, EA, CPA
Rose-ann De Villa, an IRS Enrolled Agent and CPA with 14 years of expat tax experience, specializes in US tax preparation, tax planning, and tax advice for US citizens and Green Card holders living and working in the UK.
Rose-ann has been mentioned in the Daily Express UK news wherein she talked about Stimulus payments and Child Tax Credit refunds for US expats in the UK.
Table of Contents
Form 1116: How to claim the foreign tax credit as a US expat
Form 1116 is the IRS form used to claim the Foreign Tax Credit. US expats use it to reduce US tax on foreign-source income by claiming a credit for qualifying foreign income taxes already paid to another country.
If you’re living outside the US, this form often comes up quickly. Not always in the first year, but eventually. The tricky part is not just filing it. It’s knowing whether you actually need it in the first place.
Let’s break it down in a way that feels usable, not just technical.
Do you need Form 1116 as a US expat?
You generally need Form 1116 if you paid foreign income taxes and want to claim a credit against your US tax. However, some expats qualify for a simplified exemption and may not need to file it.
Before getting into calculations or rules, it helps to answer the simplest question first: Do you even need this form?
Quick checklist:
- Did you pay foreign income tax?
- Was it more than US$300 (US$600 if married filing jointly)?
- Is your income more than the passive income reported on a payee statement?
- Do you want to carry forward unused credits?
If you answered yes to any of these, you may need to file Form 1116.
Quick decision table:
|
Situation |
Do you need the form? |
Why |
|
Foreign taxes are US$300 or less (US$600 if married filing jointly) |
Maybe |
Only if all conditions are met: passive income, qualified payee statement, and no carryovers. |
|
You paid income tax to a foreign country |
Maybe |
Not always required. The simplified exception may still apply. |
|
You only use the Foreign Earned Income Exclusion |
Usually no |
You are excluding income, not claiming a credit. |
|
You have foreign investment income |
Maybe |
Often passive income. May qualify for the simplified exception if conditions are met. |
|
You want to carry forward unused credits |
Yes |
Required to track and claim carryovers. |
In practice, many expats skip this step and assume they don’t need it. That can work in simple cases. However, once your situation gets even slightly more complex, this form becomes hard to avoid.
When it applies is only part of the picture. Next, here’s what it actually does.
Should you claim FTC or FEIE? Use our free calculator to find out.
What does Form 1116 actually do?
Form 1116 calculates how much foreign tax you can use to reduce your US tax, based on your foreign-source taxable income relative to your worldwide taxable income. It also applies separate rules depending on the type of income.
At a high level, the idea is simple:
If you pay tax in another country, the US may give you a credit for it.
However, this is not always a full dollar-for-dollar offset. The IRS limits the credit to the portion of your US tax that relates to your foreign-source taxable income, not just any income earned abroad.
If a significant share of your income is foreign-source, a similar share of your US tax may be offset. This is only a rough guide. The actual limit depends on foreign-source taxable income, worldwide taxable income, and income category.
Unused credits can generally be carried back 1 year or forward up to 10 years.
How does the Foreign Tax Credit work?
The Foreign Tax Credit is limited to the US tax attributable to your foreign-source taxable income, not the total foreign tax you paid.
Here’s a simple breakdown:
- You report your worldwide income on your US return
- You identify which portion is foreign income
- You calculate the US tax on that foreign portion
- You apply foreign taxes paid, up to that limit, with separate calculations required for each income category.
Example (real-world scenario)
Let’s walk through a simple example step by step:
Step 1: Foreign income = US$100,000
You earn all your income while living and working abroad.
Step 2: Foreign tax paid = US$30,000
This is the income tax you paid to your country of residence.
Step 3: US tax on that income = US$22,000
This is what you would owe the IRS on the same income.
Result: Credit is limited to US$22,000
You can only claim up to your US tax liability on that foreign-source taxable income, not the full amount you paid abroad. This is a simplified example. In practice, the limit depends on sourcing rules, taxable income, and income category.
The remaining US$8,000 is not wasted. In many cases, it can be carried back one year or forward up to ten years, depending on your situation.
Now, before filing anything, there’s one more key concept to understand.
What income qualifies for the foreign tax credit?
Only certain types of foreign income qualify, and they must be grouped into specific categories before the credit is calculated.
The IRS separates income into categories to prevent mixing different tax treatments.
Common categories:
- General income
Salary, wages, self-employment income - Passive income
Dividends, interest, and most rental income
You generally need to calculate the credit separately for each income category, and in many cases, file separate Forms 1116 for each. This is where things can start to feel more complex than expected.
In practice, most expats fall into one main category, usually earned income. However, once investments are taken into account, the reporting becomes more detailed.
With that in mind, let’s move on to the actual filing process.
Note: Rental income may be treated as passive or general income depending on the facts and any elections made.
How to file Form 1116 step by step
You complete the form by reporting foreign income, taxes paid, and calculating the allowable credit based on IRS limits.
Here’s a simplified walkthrough:
Step-by-step process:
Step 1: Report your foreign income
Break it down by category (general or passive)
Step 2: Enter foreign taxes paid
Only include income taxes, not VAT or sales taxes
Step 3: Convert amounts to US dollars
Use a reasonable and consistent exchange rate, such as published annual or spot rates acceptable to the IRS.
Step 4: Calculate the credit limit
Based on your foreign-source taxable income versus your worldwide taxable income.
Step 5: Apply the allowable credit
The lower of foreign taxes paid or the IRS limit
Step 6: Track unused credits
Unused credits can generally be carried back 1 year and forward up to 10 years.
In theory, this looks manageable. In practice, small details can lead to costly errors. Even something as simple as currency conversion trips people up more often than you might expect.
This is often the point at which many expats pause and reconsider their approach.
Foreign Tax Credit vs Foreign Earned Income Exclusion
The Foreign Tax Credit (FTC) reduces your US tax using foreign taxes you’ve already paid. The Foreign Earned Income Exclusion (FEIE) removes a portion of your income from US taxation entirely.
Both are designed to prevent double taxation, but they work in very different ways.
Key differences:
|
Feature |
Foreign Tax Credit |
Foreign Earned Income Exclusion |
|
How it works |
Credits foreign taxes paid |
Excludes income from US tax |
|
Best for |
High-tax countries |
Lower-tax countries |
|
Income limit |
No limit |
US$130,000 (2025 tax year) |
|
Applies to |
Income across different categories (separate rules apply) |
Earned income only |
|
Carryover |
Yes |
No |
Which one should you use? (Quick decision guide)
- High-tax countries (e.g., UK, Australia, Germany):
The Foreign Tax Credit is often more beneficial - Lower-tax countries (e.g., UAE, Singapore, Hong Kong):
The Foreign Earned Income Exclusion may reduce your US tax more - Mixed income (salary + investments, e.g., working in the UK with US dividends):
You may use a combination, but not on the same income
The best choice depends on your income type, local tax rates, and long-term plans.
In practice, expats in higher-tax countries often lean toward the Foreign Tax Credit, while those in lower-tax environments may benefit more from the exclusion. That said, outcomes can vary depending on your income mix and timing.
Note: Some expats use both strategies. However, you cannot use both benefits on the same income, and doing this properly requires careful planning.
What happens if you don’t file it correctly?
You may lose valuable tax credits, pay more US tax than necessary, or trigger IRS notices if inconsistencies arise.
In mild cases, it simply means overpaying taxes.
In more serious cases, it can lead to:
- Adjustments by the IRS
- Delayed refunds
- Additional documentation requests
It’s rarely catastrophic. However, it can become time-consuming to fix later.
Which brings us to a practical question many expats quietly ask.
Is it worth filing this yourself?
It depends on how simple your situation is. For straightforward cases, you may be able to file on your own, but once your finances become more complex, professional help can reduce errors and long-term risk.
If your situation is relatively simple, tax software can often handle it. That’s usually the case if you:
- Work for a single employer
- Live in one country
- Don’t have investments or additional income sources
However, things change once your situation expands. You may want support if you:
- Have foreign investments
- Run a business or freelance
- Earn income across multiple countries
At that point, the rules tend to overlap, and small mistakes can carry forward into future years.
There’s no universal answer here. Some people prefer handling things themselves for control, while others value the peace of mind that comes with getting it right the first time.
FAQs
-
Can I carry forward unused foreign tax credits?
Yes, unused foreign tax credits can generally be carried back one year and carried forward for up to 10 years.
-
Do I need to file this form if I don’t owe US tax?
-
Can I switch between credit and exclusion each year?
-
Does this apply to foreign pensions or investments?
-
Is the foreign tax credit always better than the exclusion?
-
Can I file Form 1116 without foreign income?
-
What is the limitation formula for the Foreign Tax Credit?
Prefer to talk it through? Schedule your free callback today.
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