Can Foreign Tax Credit Be Carried Forward? Duration, Limits, and Filing

Yes. Under federal law, a foreign tax credit that you cannot use in the year it arises can be carried back one year and carried forward up to ten years, giving you an eleven-year window to absorb the excess against U.S. tax on foreign-source income. The rules that govern the foreign tax credit carryforward are set out in 26 U.S.C. § 904(c), and they include strict ordering, category, and filing requirements that determine whether the credit actually reaches your return.¹

How Long the Carryforward Lasts

Excess credit is applied first to the tax year immediately before the year the credit arose. Whatever the carryback year cannot absorb then moves forward chronologically through the next ten tax years.¹

The window is measured from the close of the tax year the foreign taxes were paid or accrued. Credit that remains unused after the tenth carryforward year expires. It is not refundable and cannot be applied to any later return.¹

Ordering: Current-Year Taxes First, Oldest Carryover Next

When a return year has both current foreign taxes and available carryovers, the current-year taxes are used first. Only what remains of the annual limit is then filled by carryover credit, and among carryovers the oldest is used before the newest.²

That first-in, first-out sequence matters. Credits closer to the ten-year cutoff get priority, which is the only way to keep them from expiring while newer credit sits behind them. You need to track the year of origin for every batch of excess credit.

Categories Must Match, and GILTI Cannot Carry Over at All

Foreign taxes are not pooled. You sort both foreign income and foreign taxes into separate limitation categories, and a carryover stays inside the category where it began. Credit from one basket cannot offset U.S. tax on income in another.¹ The main categories are:

Passive category income: dividends, interest, rents, and royalties from foreign sources.
General category income: wages, salary, and business profits not assigned elsewhere.
Foreign branch category income: profits from a business you operate directly abroad.
Section 951A category income: global intangible low-taxed income, or GILTI.

GILTI is the sharp exception. Foreign taxes attributable to Section 951A category income cannot be carried back or carried forward. The last sentence of § 904(c) removes them from the carryover system entirely, and Treasury regulations confirm that these taxes “may not be carried back or carried forward or deemed paid or accrued under section 904(c).”² If you are a U.S. shareholder of a controlled foreign corporation with excess credit in the GILTI basket, that excess is lost. Line 10 of Form 1116 stays blank when you file for the Section 951A category.³

One narrow adjustment can shift income between the other categories. If foreign tax on a passive item exceeds the highest U.S. rate applied to that income, the “high-tax kickout” reclassifies it into the general or foreign branch category, moving the associated tax with it.⁴

Where the Excess Comes From

A carryover only exists when foreign taxes for the year exceed the annual credit limit. The limit is your total U.S. income tax multiplied by the ratio of foreign-source taxable income to worldwide taxable income, so the credit only offsets U.S. tax on income actually earned abroad.¹

If your limit for the year is $2,000 and you paid $3,000 in foreign taxes, the $1,000 difference is what carries back and forward. If your foreign taxes come in under the limit, there is nothing to carry; instead, you have unused capacity that can absorb carryovers from other years.

The $300/$600 Election Forfeits the Carryover

If your total creditable foreign taxes are $300 or less ($600 or less on a joint return), all your foreign income is passive, and you meet the other conditions, you can claim the credit directly on your return without filing Form 1116.⁵ The trade-off is real: you cannot carry back or carry forward any unused credit from a year in which you take this shortcut.⁶

Near the threshold, the calculation is worth doing both ways. In a year when your U.S. tax on foreign income is small, filing Form 1116 to preserve a carryover can be worth more than the paperwork saved.

Credit or Deduction: You Have to Pick the Credit

Foreign taxes can be claimed as a credit or as an itemized deduction, but not both in the same year, and you must apply one treatment to all your foreign taxes for that year.⁷ Carryback and carryforward rules only exist inside the credit regime. Deducting the taxes produces no “excess” to carry anywhere. And to use a carryover credit from a prior year, you have to elect the credit (not the deduction) in the year you apply it.¹

The Foreign Earned Income Exclusion Reduces What You Can Carry

If you exclude foreign earnings under the foreign earned income exclusion or the foreign housing exclusion, you cannot also claim a credit for the foreign taxes tied to that excluded income.⁶ The portion of foreign tax allocable to excluded income is calculated with a fraction: excluded income minus related deductions over total foreign earned income minus related deductions. That amount is subtracted on Form 1116, line 12, before the credit is computed.⁸

Because that reduction happens before the excess is measured, a large exclusion shrinks any carryover the year would otherwise produce.

Filing a Carryback Claim

To carry the excess back to the prior year, individuals file Form 1040-X for that earlier year (corporations use Form 1120-X). Write “Carryback Claim” at the top of page 1, and file a separate amended return for each year affected.⁹ Attach both pages of the original Form 1040 for the year the credit arose (with Schedules A and D if applicable), any Schedules K-1 or K-3 from pass-through entities for that year, the completed Form 1116 for the originating year, and refigured versions of any forms that change in the carryback year, such as Form 6251.

The deadline is unusually long. A refund claim based on a foreign tax credit carryback can be filed within ten years of the due date, without extensions, of the return for the year the credit arose — well beyond the three-year rule that applies to most amended returns.¹⁰

Reporting the Carryforward: Form 1116 and Schedule B

Individuals, estates, and trusts claim carryforward credits on Form 1116; corporations use Form 1118.¹¹ Schedule B (Form 1116) is where the running balance lives, showing how much originated in each prior year, how much has been used, and how much remains. You file a separate Schedule B for each category with a carryover, and the total flows to Form 1116, Part III, line 10.¹²

Starting with 2025 returns, Part IV of Form 1116 (lines 25 through 32) must be completed even if you file only one Form 1116.³ Keep records of the foreign taxes paid, the category they belong to, and the year of origin for the full carryforward window, and for at least three years after the credit is fully used or expires.¹³

When Foreign Taxes Change After the Fact

If a foreign government refunds part of your taxes, adjusts the amount, or currency movement produces a gain or loss on the payment, a “foreign tax redetermination” has occurred. It changes the credit you were entitled to and generally requires an amended U.S. return (Form 1040-X or Form 1120-X). Since 2021, Schedule C of Form 1116 is used to report these redeterminations.¹¹

One redetermination can move through several years. If the original credit created a carryover used in a later year, adjusting the original figure changes the balance and may require amended returns for the downstream years as well. Failing to notify the IRS carries its own penalty.

Penalties for Getting It Wrong

Reporting a carryover in the wrong category, drawing from the wrong year, or overstating the amount can trigger an accuracy-related penalty equal to 20 percent of the resulting underpayment.¹⁴ A gross valuation misstatement doubles the penalty to 40 percent. Those amounts sit on top of the additional tax owed, with interest running from the original due date of the return.

1
Office of the Law Revision Counsel. 26 U.S. Code 904 – Limitation on Credit
2
eCFR. 26 CFR 1.904-2 – Carryback and Carryover of Unused Foreign Tax
3
Internal Revenue Service. Instructions for Form 1116 (2025)
4
eCFR. 26 CFR 1.904-4 – Separate Application of Section 904 With Respect to Certain Categories of Income
5
eCFR. 26 CFR 1.904(j)-1 – Certain Individuals Exempt From Foreign Tax Credit Limitation
6
Internal Revenue Service. Topic No. 856, Foreign Tax Credit
7
Internal Revenue Service. Foreign Tax Credit – Choosing to Take Credit or Deduction
8
Internal Revenue Service. Foreign Earned Income Exclusion Adjustment
9
Internal Revenue Service. Instructions for Form 1040-X Amended Individual Income Tax Return
10
Office of the Law Revision Counsel. 26 U.S. Code 6511 – Limitations on Credit or Refund
11
Internal Revenue Service. Foreign Tax Credit
12
Internal Revenue Service. Instructions for Schedule B (Form 1116)
13
Internal Revenue Service. How Long Should I Keep Records?
14
Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments