Which foreign taxes can I claim as a credit?
Income taxes, and taxes imposed in place of an income tax. Sales taxes, value added tax, property taxes, stamp duties, customs and wealth taxes are outside, however large they were. So are interest and penalties charged on a foreign tax bill, even though they arrived on the same notice as the tax itself. Foreign social security contributions are usually outside too, and where they are relieved at all the route is a social security agreement rather than the credit. The distinction that matters is not what the foreign authority calls the levy but what it is charged on: a charge on net income behaves like an income tax, a charge on turnover or on value does not.
What happens if the foreign tax exceeds my domestic tax?
The credit is capped by the domestic tax on that income, so the excess is not refunded. What it does instead is carry, so a year of unused credit can be relieved against a year in which domestic tax on similar foreign income exceeds the foreign tax paid. Carryover has to be tracked category by category and, where the rules require it, country by country, because an unused amount is not a single pool you can apply anywhere. Filers moving from a high-tax country to a low-tax one often find the carryover useful; filers who stay in a high-tax country tend to accumulate it, and should still compute and record it each year.
Can I claim a credit for tax I could have reclaimed?
No. The credit is for foreign tax you were legally obliged to pay, so an amount over-withheld that you can recover under the other country own law or under a treaty is not creditable, whether or not you go and recover it. This bites most often on withholding taken at the domestic rate of the paying country when a treaty allowed less. The order of work is therefore to claim the reduction or refund at source first, and to credit only what properly remains. Where the reclaim window abroad has closed, the credit does not reopen to fill the gap, which is why treaty rates are worth checking before a payment is made rather than after.
Why is my foreign tax credit less than the tax I paid?
Usually because of the limit rather than the tax. The credit cannot exceed the domestic tax on the foreign income, and that ceiling is computed on your foreign-source income as the domestic rules measure it, after deductions have been allocated against it. Three things commonly shrink it. Income you regard as foreign may be sourced domestically under those rules. Deductions and expenses are apportioned to foreign income, which lowers the ceiling without lowering the foreign tax. And the two countries may measure the same income differently, so a larger foreign base produced a foreign tax the domestic figure cannot absorb. The shortfall generally carries rather than disappearing.
Do the two countries tax years need to line up?
They do not, and often they do not. The credit is claimed in the domestic year to which the foreign income belongs, and the question is which year foreign tax that is, which depends on whether you claim as the tax is paid or as the liability accrues. An accrual basis generally matches tax to income better across mismatched year ends; a paid basis is simpler and can strand tax in the wrong year. A change of basis is not something to do casually, and once the foreign assessment is finally settled at a different figure, the domestic year already filed may need adjusting to match it.
Should I take a credit or a deduction for foreign tax?
A credit reduces the tax itself; a deduction only reduces the income the tax is charged on, so the credit is usually worth more. The choice is generally made for the whole year rather than tax by tax, which is what makes it worth computing both. A deduction can win in narrow cases, where the credit is largely blocked by the limit and there is no realistic prospect of using the carryover, or where the foreign levy is not a creditable income tax at all and the deduction is the only route. Switching between the two also affects carryover already accumulated, so the decision is not purely about the current year.
Do I get credit for all of the foreign tax I paid?
Only up to your own country's tax on that same income, and only for tax you were legally obliged to pay. Two consequences follow. Living somewhere that taxes you more heavily than your residence country does leaves an excess that becomes a carryover rather than a refund. And withholding suffered above the treaty rate is not creditable — the route back to that money is a refund claim in the country that took it. See claiming the credit.
Is the foreign tax credit refundable?
No. It reduces your tax to nil at most; it never pays out beyond that. Where foreign tax exceeds the credit you are allowed, the excess is generally carried back or forward within its own category rather than refunded — so a high-tax year abroad can leave a balance you use in a later year. Tracking those balances matters, because an unused carryforward can expire. Our carryforward tracker keeps the running position.
