Foreign Tax Credit carryover and carryback guide for expats

The Foreign Tax Credit (FTC) carryover lets a US taxpayer move qualified foreign income taxes that exceed the Form 1116 limitation back 1 year and forward as many as 10 years. For 2025 returns filed in 2026, balances must be tracked by income category, and section 951A-category taxes cannot be carried over.

An unused FTC arises when your creditable foreign taxes exceed the US tax attributable to the same category of foreign-source income. The excess goes first to the immediately preceding tax year, to the extent that year has unused limitation, and then to the next 10 tax years in chronological order.

This rule can prevent an otherwise valuable credit from disappearing merely because the foreign tax was higher than the Form 1116 limit in one year. The IRS’s 2025 Publication 514 contains the governing individual carryback and carryover guidance.

The following 3 groups are most likely to benefit from tracking unused credits:

• Expats living in higher-tax countries who pay more foreign income tax than the United States permits as a current-year credit.
• Investors receiving foreign dividends, interest, rent, or royalties are subject to foreign tax.
• Taxpayers switching between the FTC and Foreign Earned Income Exclusion, especially when the change affects the amount of foreign-source taxable income reported in the United States.

For a 2025 return filed in 2026, the following 3 Form 1116 updates deserve attention:

• Lines 25–32 of Part IV must be completed even when the taxpayer files only 1 Form 1116.
• The new $6,000 deduction for an eligible taxpayer age 65 or older must be removed from taxable income when calculating the FTC limitation.
• Section 960(d)(4) generally disallows 10% of certain foreign taxes attributable to distributions of section 951A previously taxed earnings when the underlying section 951A inclusion arose in a U.S. shareholder tax year ending after June 28, 2025. The effective date depends on the inclusion year, not merely on when the related foreign tax is paid or accrued.

TFX prepares US expat returns involving multiple Form 1116 categories, prior-year credits, and Schedule B reconciliations. Discuss your filing needs today with us.

What is the Foreign Tax Credit carryover?

A Foreign Tax Credit carryover is the unused portion of qualified foreign income tax that exceeds the Form 1116 limitation for 1 income category. The excess is carried first to the prior year and then forward for 10 years, but it cannot move freely between general, passive, treaty-resourced, or other categories.

Suppose you paid $12,000 of creditable foreign income tax, but your current Form 1116 limit is only $9,000. You may claim $9,000 for the current year, while the remaining $3,000 becomes excess foreign tax subject to the carryback and carryforward rules.

A tax carry over is simply an unused tax attribute moved from its original year to another permitted year. For FTC purposes, the original year, separate income category, amount used, amount carried back, remaining balance, and expiration year must all remain identifiable.

To see how the category, sourcing, and limitation figures reach Form 1116, read our guide on filing Form 1116 to claim the Foreign Tax Credit.

General vs passive income categories

General and passive income require separate Form 1116 calculations and separate Schedule B balances, even when both arise in the same 2025 tax year. General-category excess tax generally cannot offset passive-category US tax, and a passive balance cannot be shifted into the general basket merely because that basket has unused limitation.

The 2 most common expat categories must be calculated and carried independently on separate Forms 1116.

 

The 2025 Form 1116 instructions list 7 separate categories, including foreign branch income, section 951A income, section 901(j) income, certain treaty-resourced income, and lump-sum distributions. The table focuses on the 2 categories most frequently encountered by individual expats.

Passive income may require additional adjustments. High-taxed passive income can be reclassified under the high-tax kickout rules, while qualified dividends and capital gains may require rate-differential adjustments before the FTC limit is calculated.

Understand how foreign dividends, withholding, and treaty rates work before treating the full amount withheld as creditable. A treaty-limited amount that the taxpayer can recover from the foreign country generally is not a final creditable foreign tax.

Foreign Tax Credit carryover vs AMT credit carryover

A regular FTC balance and an AMT credit carryover are separate tax attributes reported through different calculations. Regular unused foreign taxes are tracked on Form 1116 and Schedule B for up to 10 years, while a prior-year minimum tax credit is generally calculated on Form 8801 and may continue without the same 10-year FTC limit.

The following 3 distinctions prevent the most common AMT reporting mix-ups:

• Regular FTC carryover: Calculated on the regular Form 1116 and reconciled on Schedule B.
• AMT foreign tax credit: Recalculated separately using AMT income, deductions, Form 6251, and an AMT version of Form 1116. Its carryover can differ from the regular FTC balance.
• Minimum tax credit: Generally reported on Form 8801 after AMT was paid in a prior year. This is not the same credit as unused foreign income tax.

For example, a taxpayer may have a $2,000 regular passive-category FTC carryover, a different AMT foreign tax credit balance, and a separate Form 8801 minimum tax credit. Each amount must be tracked under its own rules.

When and how to use foreign tax carryover

A foreign tax carryover is usable when the current-year FTC limitation for the same income category exceeds the creditable foreign taxes generated in that year. Current-year foreign taxes are accounted for first, after which older carryovers absorb the remaining limitation beginning with the oldest unexpired origin year.

A carryover is most valuable when foreign-source income remains taxable in the United States but foreign tax falls in a later year. This pattern can occur after a move to a lower-tax country, a reduction in foreign withholding, or a year with unusually high US tax.

The following 3 situations are generally the best fit:

• Future US tax is expected on income in the same Form 1116 category.
• The taxpayer has older balances that will expire within the next 1–3 years.
• A change from FEIE to FTC increases foreign-source taxable income and available US limitation.

The following 3 situations may provide little or no current benefit:

• US tax before the FTC is already $0.
• The taxpayer has no foreign-source taxable income in the category that generated the credit.
• The only unused taxes belong to the section 951A category, for which carrybacks and carryforwards are prohibited.

All worldwide income must first be reported in the appropriate place on the return. See our guide to reporting foreign income on Form 1040 for the forms and schedules used for wages, investments, rent, pensions, and other income.

 

How to calculate your Foreign Tax Credit carryover

The carryover equals creditable foreign taxes available in 1 category minus the Form 1116 limitation for that category, subject to reductions, sourcing rules, and capital-gain adjustments. The simplified limitation is foreign-source taxable income divided by worldwide taxable income, multiplied by US income tax before the FTC.

Simplified FTC limitation formula:
Foreign-source taxable income in the category ÷ worldwide taxable income × US income tax before the FTC

The IRS’s Foreign Tax Credit calculation guidance explains that the allowable credit is generally the smaller of qualified foreign tax or the US tax attributable to foreign-source income.

The calculation has 3 stages – identify the inputs, calculate the category limit, and subtract that limit from available foreign tax.

 

This is a simplified formula. Form 1116 lines 15–23 account for net foreign-source taxable income, worldwide taxable income, tax-rate adjustments, certain deductions, and other limitations.

For tax year 2025, an eligible $6,000 deduction for a taxpayer age 65 or older is reported on Schedule 1-A but removed from the taxable-income denominator used for the FTC limitation. That adjustment can change the limit and the resulting excess credit.

Example 1 – Form 1116 calculation example for general-category income

Based on our client scenario at TFX: A US expat in the UK has $100,000 of general-category wages, $120,000 of worldwide taxable income, $24,000 of US tax before the FTC, and $28,000 of creditable UK tax. The simplified Form 1116 limit is $20,000, leaving $8,000 of excess foreign tax.

The $28,000 foreign tax exceeds the $20,000 category limit by $8,000, which becomes the amount available for carryback and carryforward.

 

This scenario assumes the $28,000 consists of creditable foreign income taxes and that no treaty sourcing, FEIE allocation, capital-gain, or other Form 1116 adjustment applies.

You can review our complete Foreign Tax Credit guide for US expats for the underlying eligibility and creditability rules.

Example 2 – Foreign Tax Credit calculation for passive-category income

Based on our client scenario at TFX: An expat receives $10,000 of foreign dividends, pays $2,500 of final creditable foreign tax, has $150,000 of worldwide taxable income, and owes $30,000 of US tax before credits. The passive-category limit is $2,000, leaving a separate $500 passive carryover.

The $500 excess remains entirely in the passive basket and cannot offset US tax calculated for general-category wages.

 

The example assumes the 25% foreign tax is legally due, cannot be refunded, and is not reduced by a treaty. Qualified dividends may also require a capital-gain rate adjustment on Form 1116.

Read our guide on US taxation of foreign dividends before using gross withholding as the creditable amount.

Need help calculating FTC carryovers while catching up on US expat returns?

If you qualify for the IRS Streamlined Foreign Offshore Procedures, TFX can help prepare the missing returns and reconstruct the Form 1116 records needed to identify any usable foreign tax credit carryovers. Streamlined filing generally covers 3 years of delinquent tax returns and 6 years of FBARs, so it is often the right time to rebuild prior-year FTC schedules before credits expire.

Use our Streamlined filing service today, as 2,200+ Americans did, and get back to compliance with the IRS

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Foreign Tax Credit carryback: When and how to use it

A Foreign Tax Credit carryback applies unused foreign tax first to the immediately preceding tax year, but only to the extent that the prior year has an excess FTC limitation in the same category. The carryback computation applies before any remaining balance moves into the 10 succeeding tax years.

A taxpayer should not amend the prior return merely because the current return produces excess tax. The prior-year Form 1116 must first show enough unused limitation to absorb some or all of the excess.

A carryback is useful only when the prior year has a positive unused limitation in the same income category.

 

The IRS Form 1040-X page confirms that the form may be used to make a claim arising from an unused-credit carryback. Electronic filing is generally available for the current and 2 prior tax periods; older eligible amendments may require paper filing.

 

 

A carryback can change both the 2024 and 2025 returns and alter the remaining 10-year schedule.

How to claim

To claim a 2025 excess-tax carryback to 2024, determine the 2024 excess limitation, amend the 2024 return, and attach a revised Form 1116 for the matching category. Any balance left after the carryback must remain identified by its 2025 origin year on Schedule B for future returns.

The following 6 records and forms support a carryback claim:

1. The originally filed prior-year Form 1040 and all Forms 1116.
2. Form 1040-X for the prior year.
3. A revised Form 1116 showing the same category and the carried amount.
4. Schedule B instructions and a revised reconciliation when a balance remains or an adjustment must be shown.
5. A statement identifying the origin year, category, amount, and section 904(c) computation.
6. Proof that the foreign tax was paid or accrued and qualifies for the credit.

A carryback of Foreign Tax Credit amounts must be limited to the prior year’s available excess limitation. The governing regulation also requires a statement or detailed schedule supporting the carried amount when the taxpayer claims the benefit.

A Form 1040-X carryback claim attributable to foreign tax is generally subject to the special 10-year period measured from the unextended due date of the return for the year in which the foreign tax arose.

To claim an FTC carryback, most expat filers use Form 1040-X with a revised Form 1116. Form 1045 may be available for certain tentative refund claims, but it has a shorter deadline and should be reviewed carefully before use.

Carryback vs carryforward

A carryback moves excess tax to 1 preceding year, while a Foreign Tax Credit carryforward moves the remaining balance through as many as 10 succeeding years. Both are limited by the same income category, and neither permits the taxpayer to bypass a year that would absorb an older balance under the chronological ordering rules.

Carryback may recover prior-year tax sooner, while carryforward provides a 10-year window but exposes the credit to expiration.

 

The IRS’s Foreign Tax Credit overview confirms the 1-year carryback, 10-year carryforward, and section 951A exception.

Foreign Tax Credit carryforward period

The Foreign Tax Credit carryforward period covers the 10 tax years after the year the unused foreign tax arose. Credits are used chronologically, beginning with the oldest eligible balance, and any amount remaining after the 10th succeeding tax year expires, even when an intervening year produced no usable FTC limitation.

Schedule B provides columns for the 10th through the 1st preceding years, the current year, amounts used, amounts expired, amounts generated, estimated or actual carryback, and the balance moving to the following year.

An origin-year tracker should show the category and expiration year so that a 10-year balance is not mistaken for a permanent credit.

 

A tax credit carryforward may be reduced even in a year when the taxpayer deducted current foreign taxes instead of claiming a credit. If that year has excess limitation, carried taxes can be treated as absorbed even though no current credit benefit was claimed.

Switching between FTC and FEIE can affect the amount of income and foreign tax available for the limitation.

 

 

Form 1116 and Schedule B

Form 1116 calculates the current FTC by category, while Schedule B reconciles as many as 10 prior origin years and the current-year excess. For 2025 returns, carryovers enter Part III, line 10, and Part IV lines 25–32 must be completed even when only 1 Form 1116 is filed.

Four forms serve different purposes – only Form 1116 and Schedule B calculate and reconcile the regular FTC balance.

 

Form 1116 has 4 principal parts. Part I reports foreign-source taxable income or loss, Part II reports foreign taxes paid or accrued, Part III figures the credit and includes carryovers on line 10, and Part IV summarizes the separate-category credits.

The official Schedule B form is currently marked “Rev. December 2022,” but it continues to be the reconciliation schedule used with the 2025 Form 1116. A separate Schedule B is used for each applicable income category.

A tax credit carry over cannot be created in or moved into a year covered by the simplified no-Form-1116 election. That election is generally available only when all foreign income is passive, all income and tax appear on qualified payee statements, and creditable foreign taxes do not exceed $300, or $600 on a joint return.

IRS Foreign Tax Credit carryover reconciliation

Schedule B reconciles up to 10 prior origin years, current-year excess tax, amounts used, amounts carried back, and amounts expiring in the current year. Its purpose is not merely recordkeeping – the total adjusted prior-year carryover on line 3 feeds directly into Form 1116 Part III, line 10.

Workflow: Prior-year balance by category and origin year → adjustments → current-year foreign taxes → current FTC limitation → oldest carryovers used → prior-year carryback → remaining carryforward.

A carryover Foreign Tax Credit balance begins on Schedule B line 1 with amounts transferred from line 8 of the prior-year schedule. Line 2 records carryback adjustments, foreign tax redeterminations, audit changes, and other corrections, while line 3 calculates the adjusted balance available for the current year.

Line 4 reports prior-year credits absorbed in the current year, starting with the oldest column. Line 5 removes any amount expiring from the 10th preceding year, line 6 reports current-year excess foreign tax, line 7 reports the amount carried back, and line 8 carries the remaining balance into the following year.

The schedule should agree with the category selected on the attached Form 1116. A passive Schedule B, for example, should not contain a general-category wage credit.

Step-by-step: How to use a Foreign Tax Credit carryover this year

Using an FTC balance on a 2025 return requires 5 coordinated steps: reconstruct the origin-year schedule, confirm each income category, calculate the current limit, absorb older balances in chronological order, and test the mandatory prior-year carryback before determining the amount that remains available through 2035.

The following 5 steps provide the filing sequence:

1. Gather prior schedules and proof. Collect each prior Form 1116, Schedule B, foreign tax assessment, withholding record, and exchange-rate calculation.
2. Separate every income category. Match wages, business income, dividends, interest, rent, and treaty-resourced income to the correct basket.
3. Calculate the 2025 FTC limitation. Use net foreign-source taxable income, worldwide taxable income, US tax before credits, and all required Form 1116 adjustments.
4. Use current and prior taxes in the required order. Account for 2025 foreign taxes, then absorb prior carryovers beginning with the oldest unexpired year.
5. Test the 2024 carryback and update Schedule B. Determine how much can move to 2024, report the balance remaining for 2026, and identify its expiration year.

A taxpayer who needs to carry over Foreign Tax Credit amounts should not rely solely on a tax software summary. The retained schedule should identify the origin year, category, foreign country when relevant, original amount, adjustments, amounts used, and amount expiring.

Foreign Tax Credit carryover mistakes to avoid

Five recurring errors can reduce or eliminate an otherwise valid FTC balance: mixing separate income baskets, omitting Schedule B when it is required, overlooking a 10-year expiration, treating the regular credit as cash-refundable, and attempting to use foreign taxes against US tax on income sourced to the United States.

The following 5 mistakes should be checked before filing:

1. Mixing general and passive categories. Each category has its own limitation, Form 1116, and Schedule B.
2. Skipping Schedule B when the filed Form 1116 has a carryover. This breaks the reconciliation between line 10 and the origin-year balances.
3. Losing a credit after 10 years. Schedule B line 5 specifically reports the amount from the 10th preceding year that expires unused.
4. Assuming the regular FTC produces cash beyond tax owed. It generally reduces US income tax but does not create a payment after tax reaches $0.
5. Using foreign tax against US-source income. The FTC limitation generally protects US tax on foreign-source income, subject to treaty-resourcing and other specific rules.

Another frequent problem is claiming tax that the taxpayer can recover abroad. When a treaty limits withholding to 15% but 25% was withheld, the refundable 10% generally cannot be treated as a final foreign income tax merely because the refund application was not filed.

Conclusion

FTC carryovers are valuable only when they are tracked by category, origin year, amount used, and expiration date. A 2025 excess can affect the 2024 return and as many as 10 future returns, while one incorrect basket or omitted adjustment may overstate both the current credit and the remaining balance.

A carryover Foreign Tax Credit should be reviewed alongside the taxpayer’s income sourcing, FEIE use, foreign-tax refunds, treaty positions, and AMT calculations. The result is a tax credit carryforward schedule that can be supported if the IRS requests the underlying records.

TFX assists expats with Form 1116 preparation, Schedule B reconciliation, amended returns, and prior-year credit reconstruction. Discuss your filing requirements and the next step for your expat return.

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