CRA late-filing penalties in Canada: what you owe and how to reduce it.
Missed the filing deadline. The Canada Revenue Agency (CRA) charges a penalty and, separately, interest, and the two stack. Here is the math, the deadlines that actually apply, and a calculator that runs your number.
If the books are not caught up, the tax deadline shows up faster than expected. Take a breath. Late filings happen, and they are recoverable, but the CRA charges for the delay. Knowing exactly what you owe, and which penalty hurts more, makes the next move obvious.
The penalty and the interest
Missing the deadline triggers two charges, and the CRA assesses them separately. They sound similar. They are not.
The big one.
Charged as soon as the return is one day past the deadline. Hits whether you owe $100 or $100,000.
The slow one.
Charged on the tax balance from the day after the payment deadline. For the quarter ending September 30, 2026, the CRA charges 7 percent on overdue taxes, CPP contributions, and EI premiums. The rate is set every quarter and interest compounds daily. This is interest, not a penalty. The CRA charges it separately from the late-filing penalty.
The late-filing penalty is the bigger of the two for almost everyone. The interest stings, but the rate is set each quarter and it stops growing once you pay. The late-filing penalty is front-loaded: a flat 5 percent of the balance the moment you are late, then another 1 percent for every full month you stay late, up to 12 months. Both charges apply on top of the tax you already owe, not in place of it.
The math
For a first-time late filer, the failure-to-file penalty works out to:
Owe $10,000 and file six months late, and the failure-to-file penalty is $1,100. That is the flat $500, plus $100 a month for six months. Interest on the unpaid balance is on top of that, accruing daily.
| Charge | Rate | How it accrues |
|---|---|---|
| Late-filing penalty, standard | 5 percent of the balance, plus 1 percent per full month, to a maximum of 12 months | One-time plus monthly, capped at 17 percent |
| Late-filing penalty, repeat | 10 percent of the balance, plus 2 percent per full month, to a maximum of 20 months | One-time plus monthly, capped at 50 percent |
| Arrears interest | 7 percent, the quarter ending September 30, 2026 | Compounds daily on the unpaid balance until paid |
The calculator
Plug in your balance and how late you are. The toggle at the top of the card switches between first-time and repeat-offender rates.
If you have been late before
The CRA reserves a bigger hammer for repeat late filers. If the CRA issued a demand to file and assessed a failure-to-file penalty in any of the three previous tax years, the rates double:
- 10 percent of the balance owing, plus
- 2 percent for every full month late, up to 20 months.
That ceiling is a 50 percent surcharge on the balance, before interest. Worth avoiding.
When taxes are due
Two deadlines matter for any return: when the paperwork is due, and when the payment is due. They are not always the same day, and the CRA does not forgive interest because the form has not been filed yet.
Note the gap on row two. A self-employed sole proprietor files by June 15, but any tax owing is due April 30. Miss April 30 and interest starts running, even though the return is still on time. The same trap exists for corporations: the return is due six months after year end, but payment is due two or three months in.
What if I do not owe anything?
The late-filing penalty is a percentage of the balance you owe. If your balance is zero, 5 percent of zero is zero, so there is no late-filing penalty and no interest to charge.
Filing late still costs you, in a quieter way. Benefit and credit payments that depend on your return, including the GST/HST credit and the Canada Child Benefit, are calculated from your filed return. File late and those payments can be delayed or interrupted until the return is processed. If you are owed a refund, you are simply lending the government your money for longer at no interest to you.
The short version: filing on time costs you nothing when you owe nothing, and it protects payments you may be counting on.
Can the CRA cancel a penalty?
Sometimes. The CRA has taxpayer relief provisions that let it cancel or waive penalties and interest in specific situations: serious illness, a death in the family, a natural disaster, a postal disruption, or an error on the CRA's own part. Financial hardship can also qualify for interest relief.
You apply with Form RC4288, Request for Taxpayer Relief. Two things to know before you count on it. Relief is discretionary, so a request is not an entitlement, and there is a 10-year limit: the CRA can only consider a request for a tax year ending within the 10 calendar years before the year you apply.
Relief is for circumstances outside your control. "I forgot" is not one of them. If your reason is a genuine one, document it and apply, because the CRA does grant these.
How to limit the damage
You can avoid every late-filing penalty by filing and paying on time. Sometimes that is not the world you are in. If the deadline has already passed, two moves limit what you owe.
- File, even if you cannot pay. The failure-to-file penalty is bigger than the interest on what you owe. Filing on time, and paying late, is the cheaper of the two mistakes. Get the return in, then sort out the payment plan with the CRA.
- File quickly, but file right. The clock is running, so speed matters, but mistakes on a late return are an audit trigger. If the books are behind, get help cleaning them up before you submit. A bookkeeper for two weeks is cheaper than a CRA review of a sloppy return, and our catch-up bookkeeping process is built for exactly this position.
One more deadline that is easy to miss: GST/HST has its own filing schedule and its own penalty regime, separate from income tax. Being current on one says nothing about the other. If you are registered, or close to the threshold where you have to be, see our guide to GST/HST registration for small businesses.
These are the federal numbers. For personal income tax, the CRA administers provincial tax on the same return everywhere except Quebec, so one penalty covers the combined balance. Separate provincial returns mainly apply to corporations in Alberta and Quebec, which run their own corporate tax, and to anyone filing personal tax in Quebec through Revenu Québec. If that is you, check the provincial penalty separately.
What is the penalty for filing taxes late in Canada?
The CRA charges 5 percent of your unpaid balance the day you file late, plus 1 percent for every full month the return stays outstanding, to a maximum of 12 months. That caps the standard penalty at 17 percent of what you owe. Arrears interest is charged separately, at 7 percent for the quarter ending September 30, 2026, and compounds daily.
| Charge | Rate | How it accrues |
|---|---|---|
| Late-filing penalty, standard | 5 percent plus 1 percent per full month, to 12 months | Capped at 17 percent of the balance |
| Late-filing penalty, repeat | 10 percent plus 2 percent per full month, to 20 months | Capped at 50 percent of the balance |
| Arrears interest | 7 percent, the quarter ending September 30, 2026 | Compounds daily until paid |
Sources and further reading
Where Numinor fits
Most late filings start with a bookkeeping problem. The deadline came around, the books were not ready, and the easier path was to wait. Numinor catches up the books, files the return, and gets clients current with the CRA in about 30 days for most situations. Then we keep the books on a monthly close so the next deadline is a non-event.
If you are behind, the first step is a free books review. We tell you what the catch-up actually looks like and what it costs, no pressure to sign.
Numinor gets you caught up and clear with the CRA.
Behind on taxes and bookkeeping? Our team handles the catch-up, files the back returns, and keeps the books current after. Bookkeeping plans start at $299 a month for Starter and $499 for Growth, with final pricing scoped on the call.