What happens if we miss the deadline for the T1145 agreement forms?
The forms are time-limited, so the cost of missing the window is not primarily a penalty. It is the loss of the mechanism itself. Without the agreements the Canadian adjustment and the counterparty's treatment are no longer tied together, and the group is exposed to the same profit being taxed in both countries. That is a permanent cost rather than a charge for lateness. Where the window has passed, the work is to establish exactly when it closed, what position each side has actually taken in its filed returns, and what routes remain for bringing the two back into line.
Is there a penalty for filing Form T1145 late?
The charge people usually have in mind is the late-filing penalty on a corporate return, which is worked out on the balance owing for that return. It attaches to the return and not to the agreement forms, so reaching for it here answers the wrong question. Treating a percentage charge as the worst case also understates the position badly. The real exposure on a missed window is the adjusted profit being taxed in both countries: no penalty schedule measures it, no ceiling caps it, and it does not fall away with time. Price the double taxation first, then deal separately with anything owed on the return.
Can the CRA accept the transfer-pricing agreements after the time limit has passed?
That is not something anyone should promise in advance. What can be said is what a request needs to contain to be worth making: when the adjustment arose, when the window closed, why the agreements were not lodged in time, what position each group member has taken in its own filed returns, and precisely what the group is asking for. Assemble that before approaching the CRA rather than during. Establish the counterparty country's position at the same time, because an accommodation in Canada is of limited use if the other side can no longer amend.
Does a late agreement mean our group gets taxed twice on the same profit?
It is the risk, and it is why timing matters so much on these forms. An adjustment made on one side only leaves the same profit in two tax bases. The agreements are what makes the Canadian adjustment consistent with the counterparty's position, so when they are not in place that consistency has to come from somewhere else. Usually that means an amendment in the other country, if its limitation period is still open, or a treaty route, which is slower and takes the decision out of the group's hands. Establish which of those is still available before assuming an outcome.
Our corporation's return was late as well. How is that penalty calculated?
For the 2025 tax year the late-filing penalty is 5% of the balance owing plus 1% for each full month the return is late, to a maximum of 12 months. Where the CRA issued a demand to file and charged a late-filing penalty in any of the three preceding tax years, the charge for that same tax year is 10% plus 2% for each full month, to a maximum of 20 months. Both limbs of that trigger have to be met. Filing late repeatedly, by itself, does not reach the higher rate. Check the notices for the earlier years before accepting any figure.
Does interest keep running while the agreement forms are outstanding?
Interest runs on an unpaid balance and it compounds daily. The agreement forms carry no balance of their own, so outstanding forms are not themselves generating interest. What they can do is leave an adjustment unresolved, and an adjustment that increases the Canadian entity's income produces a balance that does attract it. Separate the two when deciding what to do first. Paying down a quantified balance stops the daily charge growing, while the agreements address the quite different question of whether the profit is taxed once or twice.
What is double tax relief and how is it given?
Three mechanisms, and which one you get depends on your residence country's law and the treaty. Exemption leaves the foreign income out of the residence-country base. Credit taxes it and then subtracts the foreign tax, capped at the residence-country tax on that income. Deduction merely reduces taxable income by the foreign tax, and is usually the weakest. Canada and the United States lead with credit; several treaties give exemption for specific income types. See claiming the credit.
I have not filed for several years while living abroad — what are my options?
Both countries have routes back, and using one before they contact you is what preserves the relief. On the US side there are procedures aimed at taxpayers whose failure was not wilful, including one designed for people living outside the country, and separate procedures for late account reports and information returns alone. Canada has its voluntary disclosures programme and taxpayer relief for penalties and interest. Filing quietly and hoping is the one approach with no protection attached to it. See catch-up filing.
