What Happens If You File Taxes Late?
Late-filing penalties, interest and lost benefits, and what to do if you are already late.
The short version
- File late with a balance owing: a penalty of 5% of the balance, plus 1% for each full month late, up to 12 months. Interest runs on top, compounded daily.
- Late again within three years after a demand to file: 10% plus 2% a month, up to 20 months.
- No balance owing? No late-filing penalty. But benefits such as the Canada Child Benefit and the Canada Groceries and Essentials Benefit stop until you file.
- Can't pay? File on time anyway. Filing stops the penalty; paying stops the interest.
- 2026 returns are due April 30, 2027 (June 15 if you or your spouse were self-employed).
What Happens If You File Taxes Late in Canada?
The most expensive tax mistake in Canada isn't a wrong number. It's an envelope that never got mailed. The late-filing penalty is charged on top of interest, and both grow every month. The good news: it's one of the easiest penalties to avoid, because it's about filing, not paying.
The Penalty, Worked Out
| Balance owing | 3 months late | 12 months late |
|---|---|---|
| $1,000 | $80 (5% + 3%) | $170 (5% + 12%) |
| $5,000 | $400 | $850 |
| $20,000 | $1,600 | $3,400 |
Those figures are the first-time penalty only, before interest. A repeat late filer (penalized in one of the previous three years, and sent a demand to file) pays 10% plus 2% a month for up to 20 months: up to 50% of the balance. Interest is charged daily on both the tax and the penalty.
Late With No Balance Owing
If you're owed a refund, or owe nothing, there's no late-filing penalty. But you lose in other ways:
- Benefits stop. The Canada Child Benefit, the Canada Groceries and Essentials Benefit and many provincial benefits are recalculated each July from your return, and your spouse's. No return, no payments.
- Refunds expire. CRA generally issues refunds only for the last ten calendar years, and a late return waits in line like any other (see how long a refund takes).
- RRSP room isn't recorded for the income you earned, until you file.
- The Guaranteed Income Supplement can stop for seniors who don't file.
Not sure you even had to file? See do I have to file taxes in Canada.
How much is filing late costing you?
Tell the assistant the year, the balance you expect and how late you are. It works out the penalty and estimated interest, and what you could still get back in benefits by filing now.
Self-Employed Deadlines Are Different
If you or your spouse had self-employment income, the filing deadline is June 15, so the late-filing penalty starts after June 15. But the balance was still due April 30, and interest has been running since May 1. Filing in June doesn't mean paying in June. See self-employed taxes in Canada and the full calendar on Canadian tax deadlines.
Already Late? Here's the Order
- File now. Every full month adds 1%. NETFILE currently accepts returns for 2018 to 2025; older years go on paper.
- Pay what you can. Interest is charged daily on the unpaid balance. Surprised by the amount? See why you owe taxes this year.
- Can't pay the rest? Ask CRA for a payment arrangement. It's routine.
- Several years behind? File the oldest first if you're owed refunds, so none expire. See filing years of unfiled taxes and how far back you can file.
- Had a real reason? Serious illness, a natural disaster, a death in the family, or a CRA error: you can ask CRA to cancel the penalty and interest under the taxpayer relief provisions (form RC4288), generally for the last ten calendar years. See taxpayer relief.
Income CRA doesn't know about, in years you never filed, is a different situation: a voluntary disclosure, made before CRA contacts you, may reduce penalties. Get professional advice first. Our page on CRA tax problems covers both.
Never Again
- File on time even if you can't pay. It's the single cheapest habit in tax.
- Missing a slip? File with an estimate and a note; see missing T4.
- File online. NETFILE confirms receipt in seconds; paper has no receipt until CRA opens it.
- Get a second look in March, not May. Return Check reviews the return before you send it, while there's still time.
Late Filing Questions
What is the penalty for filing taxes late in Canada?
If you owe tax, 5% of the balance owing plus 1% for each full month late, up to 12 months. If you were charged a late-filing penalty in any of the three previous years and CRA sent a demand to file, the penalty is 10% plus 2% a month, up to 20 months.
Is there a penalty for filing late if I am getting a refund?
No late-filing penalty applies if you have no balance owing, but benefit and credit payments can stop until you file, and refunds are generally limited to the last ten years.
Should I file on time if I can't pay?
Yes. Filing on time avoids the late-filing penalty. Interest still applies to the unpaid balance, and you can ask CRA for a payment arrangement.
Can CRA cancel a late-filing penalty?
Possibly. Under the taxpayer relief provisions, CRA can cancel or waive penalties and interest for circumstances beyond your control, CRA errors or inability to pay, generally for the last ten calendar years, using form RC4288.
When is the late-filing penalty charged for self-employed people?
After June 15, the self-employed filing deadline. Interest on any balance still starts May 1, because the payment was due April 30.
All of CRA's penalties, with the numbers, are on CRA penalties and interest.
Sources: CRA, Interest and penalties on late taxes; RC4288 Taxpayer Relief; NETFILE. Penalty examples calculated by us from CRA's published rates, before interest. Checked October 2026.
Last reviewed October 5, 2026 against CRA and Government of Canada sources. How we check our facts.