Free foreign tax credit calculator
Enter your US tax, total income, and foreign income and taxes paid — this foreign tax credit calculator computes the FTC limitation and shows any carryover amount, updated live, as you type.
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Estimated only. Actual withholding depends on your W-4 elections, filing status, and local laws. Consult your payroll provider for exact figures.
Results are estimates. Consult a professional.
How the foreign tax credit calculator works
The foreign tax credit (FTC) lets US taxpayers offset their federal income tax dollar-for-dollar against income taxes paid to a foreign country, preventing the same income from being taxed twice. The credit is capped at a limitation — you cannot credit more foreign tax than the US would charge on that same foreign income.
The IRS separates income into baskets (most commonly passive and general) and applies the limitation independently within each basket. This calculator focuses on the single-basket computation. Claim the credit on Form 1116, or — if total creditable foreign taxes are $300 or less ($600 MFJ) — you may be able to skip Form 1116 and claim directly on Schedule 3.
Worked example: general basket FTC with a partial limitation
Sam earns $50,000 of foreign general-basket income (wages from a foreign employer) and $150,000 of US income, for $200,000 total worldwide income. Sam paid $15,000 in foreign income tax. US federal income tax before credits is $35,000.
FTC limitation vs foreign taxes paid — common scenarios
Whether the FTC limitation binds depends on the foreign effective tax rate relative to the US effective rate on that income. The table below shows four common outcomes for a taxpayer with $200,000 total income and $35,000 US tax before credits.
| Foreign income | Foreign rate | Foreign tax paid | FTC limitation | Allowable FTC | Excess (carryover) |
|---|---|---|---|---|---|
| $50,000 | 15% | $7,500 | $8,750 | $7,500 | $0 |
| $50,000 | 30% | $15,000 | $8,750 | $8,750 | $6,250 |
| $100,000 | 15% | $15,000 | $17,500 | $15,000 | $0 |
| $100,000 | 35% | $35,000 | $17,500 | $17,500 | $17,500 |
Base: $200,000 total income, $35,000 US tax before credits. Limitation = (foreign income ÷ $200,000) × $35,000. Source: IRS Form 1116 instructions (2024).
Tips for maximizing your foreign tax credit
The FTC rules are among the most complex in the Internal Revenue Code. These tips apply to most individual filers with foreign investment income or foreign employment income.
- Choose credit over deduction thoughtfully — A deduction (Schedule A) reduces taxable income by the foreign taxes paid, while the credit reduces tax dollar-for-dollar. The credit is almost always more valuable, but if you have no US tax liability, the deduction may be your only option.
- Use the $300/$600 simplified election when eligible — If your total creditable foreign taxes are $300 or less (single) or $600 or less (MFJ), all from passive income reported on a 1099, you can claim the FTC directly on Schedule 3 without filing Form 1116.
- Track carryovers diligently — Excess FTC carries back 1 year and forward 10 years, but only within the same income basket. Keep Form 1116 records for each year to ensure you don't forfeit valuable carryovers.
- Allocate deductions carefully — The IRS requires certain US deductions to be allocated against foreign income, which reduces your net foreign income and therefore your FTC limitation. Minimizing allocable deductions legally can expand the limitation.
- Separate your baskets — Passive income (dividends, interest, royalties) and general income (wages, active business income) must be tracked separately. Excess FTC in one basket cannot offset the limitation in another.
Accuracy and limitations
This calculator computes a single-basket FTC limitation using gross foreign income divided by total income multiplied by US tax before credits. It estimates the allowable credit and any excess carryover. It does not model deduction allocation rules, the alternative minimum tax interaction with the FTC, treaty-based sourcing overrides, or multiple-basket computations.
The actual FTC is calculated on IRS Form 1116 and requires allocation of certain deductions against foreign income, which reduces the creditable amount. For self-employment income, partnership interests, and passive activity income the computation is especially complex. This calculator is a planning estimate — not tax advice. Confirm your credit with a tax professional familiar with international tax rules.
Foreign tax credit terms defined
About this foreign tax credit calculator
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