Do I file Form 4868 if I am waiting on foreign tax slips?
That is the most common reason a cross-border filer needs one. A foreign employer's slips, a foreign assessment, or a business whose books close on a different fiscal calendar can all arrive after the US return is due, and none of them is a reason the return can simply wait. The extension is what makes the later filing date the correct one. What it does not do is postpone payment, so we build an estimate from the interim figures we do have and submit it with the request. When the foreign documents arrive, the return is completed against them and the estimate is reconciled. The full treatment is on the Form 4868 page.
Does Form 4868 give me more time to pay what I owe?
No, and the difference is where most of the cost on these files comes from. It extends the time to file the return. It does nothing to the date the balance was due. Interest, and where applicable penalties, run on an unpaid balance from the original due date even when the extension itself is perfectly valid. That is why the estimate submitted with the request matters: it is the figure you pay against, and paying it is a separate act from filing the extension. A filer who sends the request, pays nothing, and assumes both halves are covered is the one who hears about it later, by notice.
I live outside the US — do I still file Form 4868?
Living outside the United States does not end the US individual return, so the question is only whether you need longer to complete it. In practice most cross-border filers do, because the documents the return depends on — a foreign assessment, foreign employment slips, a foreign company's accounts — are produced on their own country's timetable, not the US one. The extension is the instrument that matches those two calendars. There is more than one extension route open to filers whose tax home is abroad, and they are not interchangeable, so we establish which one fits the facts before anything is transmitted. The payment position is dealt with separately in every case.
Does a federal extension cover my state return as well?
Treat them as two questions. Form 4868 is a federal request and it governs the federal return. State filing obligations are set by each state, and each state decides for itself how an extension is obtained and what it covers. So a filer who has a federal extension in hand may still have a state return sitting on its original footing, which is exactly how a year that felt handled produces a state notice later. When we take on a return we list the states in play from the facts — where you lived, where you worked, where property is held — and confirm each one's own requirement before relying on the federal request for any of it.
Do I need Form 4868 if I am getting a refund?
The interest exposure that makes the form urgent comes from an unpaid balance, so a filer who genuinely owes nothing has less at stake. The difficulty is that very few cross-border filers know which of the two they are until the return is substantially finished. A foreign tax credit that turns out smaller than expected, or income no employer withheld against, can move a position from refund to balance owing. Filing the request removes the consequence of being wrong about which one you are, and it keeps the later filing date correct. We would rather have it in place and discover the refund than the other way round.
What happens if my estimate on Form 4868 is wrong?
The estimate is not a formality. It is the figure the extension is judged against and the figure you pay to, so how it was arrived at becomes the question if the balance later turns out materially different. For a cross-border filer the estimate is usually built on interim foreign figures — a payslip run, draft accounts, a prior year's assessment adjusted for what has changed — and the useful discipline is to record that working at the time rather than reconstruct it afterwards. We keep the basis of the estimate on file with the request. When the final documents arrive the difference is paid or reclaimed on the return, and the reasoning behind the original figure is already written down.
How much foreign income is tax-free in Canada?
None of it is tax-free for being foreign. A Canadian resident is taxed on worldwide income, so foreign salary, interest, dividends, rent and gains all go on the return, converted to Canadian dollars. What genuinely reduces the bill is the basic personal amount, the credit for foreign tax already paid, and any treaty article that exempts a specific type of income. The reporting thresholds people have in mind — the foreign property statement, for one — govern reporting, not exemption. See the foreign tax credit.
What counts as foreign income, and what is a foreign tax?
Foreign income is income sourced outside the country you are filing in — where the work was done, where the property sits, where the payer is resident, depending on the type. A foreign tax, for credit purposes, is a levy imposed by another country that functions as an income tax and that you were legally required to pay. Consumption taxes, property taxes and most social contributions are not, however real the cost. Sourcing is decided by rule, not by which bank received it. See the foreign tax credit.
