The Form 1116 capital gains tax adjustment scales down your foreign-source long-term capital gains and qualified dividends before they enter the Foreign Tax Credit limitation fraction, because those items are taxed in the U.S. at rates well below the 37% top ordinary rate. You multiply each piece of preferential-rate foreign income by a factor the IRS publishes, then report the reduced amount on Line 1a of the Form 1116 for the matching income category. Skip this step and your credit will come out too large, which is one of the most common errors the IRS flags on international returns.
The reason is mechanical. The Foreign Tax Credit limit equals your foreign-source taxable income divided by your worldwide taxable income, times your U.S. tax liability.1Internal Revenue Service. About the Foreign Tax Credit If you drop a $12,000 qualified dividend into the numerator at face value, the fraction behaves as though that $12,000 were taxed at full ordinary rates. It wasn’t. The adjustment factor shrinks the numerator to match the lower tax actually imposed.2Internal Revenue Service. Foreign Tax Credit Compliance Tips
Which Income the Adjustment Applies To
Five types of foreign-source income need adjusting: long-term capital gains, qualified dividends, unrecaptured Section 1250 gain, Section 1231 gains, and collectibles gains.2Internal Revenue Service. Foreign Tax Credit Compliance Tips Short-term gains are taxed at ordinary rates, so they go onto Line 1a at full value with no adjustment.
Before you adjust anything, confirm the income is actually foreign source. This is where many filers go wrong. Under the general rule, gain from a U.S. resident’s sale of personal property, including stock, is sourced in the United States no matter where the company is incorporated or where the shares trade.3Office of the Law Revision Counsel. 26 US Code 865 – Source Rules for Personal Property Sales A narrow exception exists for stock in a foreign corporation that actively conducts business abroad, and a treaty can occasionally re-source a gain, but a typical U.S. investor selling foreign shares through a brokerage account has a U.S.-source gain that doesn’t belong on Form 1116 at all. Qualified dividends from a foreign corporation, by contrast, are generally foreign source. The same stock can produce foreign-source dividends and U.S.-source gains in the same year.
You also need to know which separate category the income sits in, because the Foreign Tax Credit is computed basket by basket.4Office of the Law Revision Counsel. 26 US Code 904 – Limitation on Credit Most individual investors use Passive Category (dividends, interest, investment capital gains) or General Category (wages, self-employment, active business income).5eCFR. 26 CFR 1.904-4 – Separate Application of Section 904 With Respect to Certain Categories of Income You file a separate Form 1116 for each category, and you run the adjustment separately inside each one.
The Adjustment Factors
Each factor is the preferential U.S. rate divided by 37%. The IRS publishes them in the Form 1116 instructions and the compliance tips page:2Internal Revenue Service. Foreign Tax Credit Compliance Tips
- 0% rate: multiply by 0. The income drops out entirely.
- 15% rate: multiply by 0.4054. This is the factor most individual investors use for qualified dividends and long-term gains.
- 20% rate: multiply by 0.5405. Applies when taxable income exceeds the 20% capital gains threshold (above $545,500 for single filers in 2026).
- 25% rate: multiply by 0.6757. Used for unrecaptured Section 1250 gain on depreciable real property.
- 28% rate: multiply by 0.7568. Used for collectibles gain.
To find which rate applies, work through the Qualified Dividends and Capital Gain Tax Worksheet in the Form 1040 instructions first. That worksheet layers your preferential-rate income into the 0%, 15%, and 20% brackets based on total taxable income.6Internal Revenue Service. Instructions for Form 1116 If your foreign gains straddle two brackets, split them and apply the matching factor to each piece.
A Worked Example
Say you have $12,000 of foreign-source qualified dividends in the Passive category, all taxed at 15%, plus $5,000 of foreign-source unrecaptured Section 1250 gain taxed at 25%.
- Qualified dividends: $12,000 × 0.4054 = $4,865.
- Section 1250 gain: $5,000 × 0.6757 = $3,379.
Instead of $17,000 flowing into the limitation numerator, $8,244 does. That drop reflects the fact that neither item was taxed anywhere near 37% in the United States.
If part of a qualified dividend fell in the 0% bracket and the rest in the 15% bracket, the 0% portion zeroes out and the 15% portion gets 0.4054. Segment by rate first, then apply the factor.
Putting the Adjusted Number on Form 1116
The adjusted amounts go onto Part I, Line 1a, of the Form 1116 for the matching category, combined with any ordinary foreign-source income in the same basket.2Internal Revenue Service. Foreign Tax Credit Compliance Tips A Passive-category Line 1a with $20,000 of ordinary foreign interest plus $4,865 of adjusted qualified dividends reads $24,865.
Lines 2 through 5 take deductions and expenses apportioned to the foreign income. Line 7 is what’s left, and it becomes the numerator of the limitation fraction in Part III. Line 15 is your U.S. tax liability, and Line 19 produces the maximum credit for that category by multiplying Line 15 by Line 7 over Line 14 (worldwide taxable income).6Internal Revenue Service. Instructions for Form 1116
One more piece: the Line 18 worksheet requires a separate adjustment to worldwide taxable income using a different set of factors in the instructions. The two adjustments work together so that both the top and bottom of the fraction reflect preferential rates. Run the Line 1a adjustment first; the Line 18 worksheet uses its own numbers from the Form 1040 worksheet.
Repeat the whole process for every category you have, then combine the final credits onto Form 1040.
When You Can Skip the Adjustment Entirely
You can claim the Foreign Tax Credit directly on Form 1040 without filing Form 1116 at all if three conditions are met: all your foreign-source gross income is Passive category, it all came on a qualified payee statement like Form 1099-DIV or 1099-INT, and your total creditable foreign taxes for the year are $300 or less ($600 for joint filers).6Internal Revenue Service. Instructions for Form 1116 No Form 1116 means no limitation fraction, and no limitation fraction means no capital gains adjustment. For investors with modest foreign dividend withholding, this election removes the problem.
When the Adjustment Creates an Excess Credit
Shrinking the numerator shrinks the limitation, but the foreign tax actually withheld doesn’t change. The combination routinely produces excess credit. If a foreign country withheld 15% on your dividends and the adjusted limitation comes in below that figure, the difference carries. You can carry unused credits back one year and forward ten, in chronological order, staying within the same category the whole time.7eCFR. 26 CFR 1.904-2 – Carryback and Carryover of Unused Foreign Tax Passive carryovers can only offset future Passive-basket U.S. tax, never General. Keep a running schedule of these balances; in a year with more favorable math they can wipe out tax you would otherwise owe on foreign-source income.