What happens if Form 1118 is filed late with the return?
Form 1118 is the schedule on which a corporation computes its foreign tax credit, so its lateness is generally the lateness of the return it belongs to rather than a separate event. That is the reassuring part. The unreassuring part is that the credit does not arrive on its own: if the form was not prepared, the return was filed without the claim, and the group has paid US tax it may not have owed. Recovering that means an amended filing with the computation built properly, not a request to have a credit applied.
Can we still claim the credit if we missed it originally?
Generally yes, by amending, and the work is the computation rather than the claim. Rebuilding a corporate foreign tax credit after the event means establishing what foreign income tax was paid or deemed paid, assigning income and taxes to the right categories, and apportioning expenses to foreign source income on a basis you can defend. Each of those is easier with the records in front of you at the time and harder years later. Limitation periods govern how far back a claim can reach, so establishing which years are still open is the first step.
Does a late Form 1118 mean we lose the foreign tax credit?
Lateness itself is not usually what loses the credit. What loses it is the passage of time closing a year, or substantiation that can no longer be produced for foreign tax the group says it paid. Those are different problems with different remedies: the first is a question of which years remain open, the second is a document-gathering exercise in the foreign jurisdictions concerned. Establishing which of the two you are facing, year by year, is more useful than any general answer about whether late claims are allowed.
Why is our usable credit smaller than the foreign tax we paid?
Because the credit is limited by the US tax on foreign source income as the rules measure it, not by the size of the foreign tax bill. Three mechanisms do most of the damage. Income and taxes are assigned to separate categories, and a surplus in one does not cover a shortfall in another. Expenses have to be apportioned to foreign source income, which reduces the limitation. And credits on foreign subsidiary earnings are computed on a deemed-paid basis rather than on what was remitted. Two groups with identical foreign tax bills can end up with very different usable credits.
Our foreign subsidiary filed its own return late, does that matter?
It matters to the parent mainly through timing and substantiation. The credit is claimed for foreign income tax, and an assessment is often what evidences the amount, so a subsidiary's unfiled year can hold up the parent's claim. Note also that a late-filing penalty is not an income tax, so it does not enter the credit computation however large it grows. In Canada, for the 2025 tax year, that penalty is five per cent of the balance owing plus one per cent of that balance for each full month the return is late, to a maximum of twelve months, and the interest running on the unpaid balance is likewise not creditable.
Which years do we fix first if no credit was ever claimed?
Work out which years are still open before deciding anything, because effort spent on a closed year buys nothing. Then start with a year whose records are obtainable, because the method established there can be applied to the others, while a year with missing substantiation will stall wherever you put it in the sequence. Carryovers complicate the order, since a credit that cannot be used in its own year may have somewhere else to go, so the open years have to be modelled together rather than one at a time.
How do you avoid double taxation?
You claim relief once, in the right country, in the right order. Usually the source country taxes first, the residence country then gives a credit for that tax against its own charge on the same income, and a treaty caps the source-country rate. Getting the order wrong is what produces a double charge you then have to unwind. The mechanism differs by income type, which is why we map the whole position before filing either return. See how to avoid double taxation.
Can I avoid capital gains tax on a foreign property?
Not by virtue of it being foreign — there is no exemption for that, and the "keep it offshore" advice you may have read is how people acquire penalties rather than savings. What genuinely reduces the gain is ordinary and legitimate: principal residence relief where the property qualifies and the designation is made correctly, a properly built cost base including acquisition costs and capital improvements, the timing of the disposition, the treaty rules for real property, and credit for the foreign tax paid. See principal residence and foreign property.
