Short answer If you haven't filed taxes in years in Canada, nothing happens at all for the years where you owed nothing, except that your benefits stop. For years where you owed tax, the CRA adds a late-filing penalty and daily compound interest, and it can demand the returns or assess you on its own numbers. Filing the missing years, oldest first, stops the damage from growing.
In this guide
- What actually happens if you don't file taxes in Canada?
- Will the CRA come after you if you don't owe anything?
- How many years back do you need to file?
- Which year should you file first?
- How do you get old T4s and tax slips?
- How much are the late-filing penalties and interest?
- Should you apply to the Voluntary Disclosures Program?
- What if you can't pay what you owe?
- What does catching up look like with an accountant?
- Key dates and numbers
This is common, and it is fixable. People stop filing after a job loss, illness, divorce or a stretch of self-employment, and then the gap becomes the reason not to start. Even the CRA lists "not realizing they needed to file" and "forgetting to file" as everyday reasons. What matters now is the order you do things in.
What actually happens if you don't file taxes in Canada?
What happens depends on one question for each missing year: did you owe tax, or were you owed money? If you owed, penalties and interest build up and the CRA can chase the return. If you were owed a refund or benefits, there's usually no penalty, but you lose that money until you file, and some of it for good after 10 years.Most people have a mix: T4 years with tax withheld often end in a refund; rideshare, delivery or trucking years with nothing withheld usually end in a balance owing.
If you owe tax
The CRA charges a late-filing penalty on any year you file late with a balance owing: 5% of the balance plus 1% for each full month late, up to 12 months. On top of that, interest compounds daily on the unpaid tax from the day after the payment due date, and the CRA also charges interest on the penalties it assesses. The prescribed rate on overdue taxes is 7% a year for October–December 2026. It has been as high as 10% in recent years (early 2024).
Interest keeps running until the balance is paid. Filing stops the penalty from growing. Paying stops the interest.
If you're owed a refund or benefits
If you owe nothing for a year, there is no late-filing penalty for that year, because the penalty is a percentage of a balance owing. The cost is different: you don't get your refund, and your benefits stop.
The CRA uses your tax return to work out three payments many Ontario families depend on:
| Benefit | What happens if you don't file | If you file late |
|---|---|---|
| Canada Groceries and Essentials Benefit (the GST/HST credit was renamed this in July 2026) | Payments stop. You only get it by filing a return, even with no income. | The CRA assesses the return and pays missed amounts retroactively. |
| Canada child benefit (CCB) | Payments stop. Your spouse or common-law partner must also file every year. | Missed amounts are paid retroactively once returns are assessed. |
| Ontario Trillium Benefit (energy and property tax credit, sales tax credit) | You only apply by filing your return with the ON-BEN form. | Assessed with your return. |
The CRA also uses your return for the Canada workers benefit and the Guaranteed Income Supplement.
Non-filer letters, demands to file and arbitrary assessments
When the CRA spots an unfiled year with potential tax owing, the file goes to its Non-Filer Program. The steps escalate:
- A letter or call asking you to file. Once you receive a formal request, you are legally required to file under subsection 150(2) of the Income Tax Act. The letter usually gives a deadline.
- A visit. If the CRA can't reach you by phone or mail, an officer may visit your home or business. They carry a CRA Authorization Card (RC121A).
- An assessment without your return. Under subsection 152(7), the CRA can assess the tax it thinks you owe from the slips it already has, such as T4s, T4As and T5s. These assessments leave out deductions and credits you could have claimed, so they usually overstate what you owe. Some people call this a notional or arbitrary assessment.
- Prosecution, as a last resort, if all attempts to get the returns fail.
An assessment the CRA made without you isn't final: file your own return for that year and the CRA reviews it and reassesses, often lower. Unsure a non-filer call is real? Call the CRA's non-filer line at 1-800-448-0444 before giving out any information.
Will the CRA come after you if you don't owe anything?
Usually not. The Non-Filer Program targets unfiled years where there are taxes owing, and the late-filing penalty only applies when you have a balance. If every missing year would have been a refund, the CRA has less reason to chase you, and you have every reason to file.Two things catch people out:
- You may owe more than you think. If you were self-employed (rideshare, delivery, trucking, cleaning, contract work), the CRA requires a return when your net self-employment income plus pensionable employment income is more than $3,500, so you can pay CPP contributions. No tax was withheld on that income, so it often creates a balance. The same goes for capital gains, RRSP Home Buyers' Plan repayments you missed, and OAS or EI clawbacks.
- "I don't owe" also means "I'm not getting paid." Refunds, the Canada Groceries and Essentials Benefit, the CCB and the Ontario Trillium Benefit only arrive after you file.
If the CRA sends you a request to file, you must file, owing or not.
How many years back do you need to file?
File every year you were required to file, and file every year where you were owed money, at least within the last 10 years. There's no rule that the CRA only looks back a set number of years for an unfiled return. The deadline that runs out is yours: after 10 calendar years from the end of a tax year, the CRA can't issue you a refund for that year.The 10-year window for refunds and adjustments
Refund requests are limited to 10 calendar years after the end of the tax year. In 2026, that means 2016 is the oldest year you can still get a refund for. A 2016 refund can't be paid after December 31, 2026. If you're owed money for an old year, file that year first. The CRA 10-year rule refund is explained in more detail in our guide to how far back you can file.
A few more practical limits:
- Electronic filing: NETFILE accepts original returns for 2018 to 2025 until January 29, 2027. Older years go on paper.
- Penalty and interest relief: the CRA can only cancel penalties for tax years ending in the previous 10 calendar years, and interest that built up in those 10 years. The same window applies to the Voluntary Disclosures Program.
Which year should you file first?
File the oldest year first, then work forward to the most recent. Each return carries numbers into the next one, and the CRA processes years in order more cleanly when you send them that way.Why oldest-first usually makes sense (carry-forwards)
Several amounts move from one year to the next:
- RRSP deduction limit. Unfiled years mean the CRA hasn't counted your earned income, so your room is understated.
- Unused tuition amounts you can carry forward.
- Non-capital losses from a bad business year, which can reduce tax in other years. You have to file the loss year to use them.
- Capital losses you can carry forward against future gains.
- FHSA participation room.
File 2025 before 2021 and 2025 may need changing again later.
The exception: if one year is about to fall outside the 10-year refund window, or the CRA has given you a deadline for a specific year, do that one first.
You can send several years at the same time. You don't need to wait for one assessment before filing the next.
How do you get old T4s and tax slips?
The fastest way is your CRA account. My Account shows slips for current and past years if the employer or payer sent them to the CRA. For anything missing, ask the issuer, or estimate your income from pay stubs or bank records and attach a note. People on Reddit often ask "can I file without my T4s?" You can, if you estimate honestly and keep the records.CRA My Account
Register for or sign in to My Account on canada.ca and look under tax slips for each year. Most T4, T4A, T5 and RRSP slips that issuers filed will be there. If you haven't used My Account before, registration may need a security code sent by mail, so start this step early.
If an accountant is doing your catch-up, you can authorize them in My Account. They can then see your slips through the CRA's Represent a Client service and pull them straight into the returns with Auto-fill My Return. This saves the most time when you have several missing years, because nobody has to collect slips by hand.
Calling the CRA
If you can't get online, call the CRA's individual tax enquiries line at 1-800-959-8281. Have your SIN, date of birth, address and, if you have one, an old notice of assessment ready so they can confirm who you are. Expect a wait.
Former employers and Service Canada slips
- Former employers and payers can reissue a slip. This also covers platforms that issue T4As.
- EI, CPP and OAS slips (T4E, T4A(P), T4A(OAS)) are also available by signing in to My Service Canada Account.
- No slip at all? The CRA allows you to estimate income from pay stubs or statements. Include a note with the issuer's name, the type of income and what you're doing to get the slip. Keep every record.
Self-employed income has no slip. Rideshare, delivery and trucking years are rebuilt from platform summaries, bank deposits, receipts, fuel records and logbooks. Start gathering these first; they take longest.
How much are the late-filing penalties and interest?
For a year where you owed tax and filed late, the penalty is 5% of the balance owing plus 1% for each full month late, up to 12 months, so at most 17%. If you were charged a late-filing penalty in any of the three previous years and the CRA sent you a formal demand to file, the repeat penalty is 10% plus 2% per full month, up to 20 months, so at most 50%. Interest compounds daily on top of both.Short version
| Situation | Penalty | Plus |
|---|---|---|
| Owed nothing for the year | No late-filing penalty | Lost refund and benefits until you file |
| Owed tax, first late filing | 5% + 1% per full month late (max 12 months) | Daily compound interest on tax and penalty |
| Owed tax, late again within 3 years after a demand to file | 10% + 2% per full month late (max 20 months) | Daily compound interest |
Illustration only, round numbers: say you owed $4,000 for 2022 and file that return in late 2026, more than 12 months after the April 30, 2023 deadline. The first-time penalty is 5% + 12% = 17%, or $680. Interest is then charged on the tax and the penalty, compounding daily at the CRA's rate for each quarter, which was between 7% and 10% from 2023 to 2026. On a balance this old, the interest can add up to about as much as the penalty. Your notice of assessment shows the exact figure.
Notice what drives the total: the balance owing and the time. The repeat penalty only applies after a formal demand. That's the strongest reason to file before the CRA writes to you.
There's a step-by-step late filing penalty calculation Canada walkthrough, including how to ask for it to be reduced, in our late-filing penalty guide.
Should you apply to the Voluntary Disclosures Program?
Apply to the VDP when you have years with tax owing and you want penalties cancelled and most of the interest reduced. Don't bother if every missing year is a refund, because there's no penalty to take off. Under the rules in effect since October 1, 2025, an unprompted application normally gets 100% of penalties and 75% of interest cancelled.What changed in 2025
The VDP is now easier to get into. Before October 2025, you generally had to come forward before the CRA contacted you. Now:
| Type of application | When it applies | Normal relief |
|---|---|---|
| Unprompted (general relief) | No CRA contact about the issue, or only a general education letter or notice | 100% of penalties, 75% of interest |
| Prompted (partial relief) | After the CRA contacted you about a specific error or gave you a deadline to file, or after it received third-party information about you | Up to 100% of penalties, 25% of interest |
| Not eligible | You're under audit or investigation about the same information, or you were egregiously non-compliant | No VDP relief |
Any accepted application also protects you from criminal prosecution and gross negligence penalties for what you disclosed. You still pay all the tax.
When VDP fits, when it doesn't
It may fit if: you have several years with a real balance owing, especially self-employment income that was never reported, and the CRA hasn't yet demanded those specific returns.
It probably doesn't fit if: every year is a refund or close to nil, or the amounts are small. Filing normally is faster, and you can still ask for taxpayer relief later if something beyond your control caused the delay.
What a complete application needs:
- Form RC199, signed by you (and by your representative, if you use one)
- All the returns needed to fix the problem: the last six years for Canadian income, the last ten for foreign income or assets
- Payment of the estimated tax, or a request for a payment arrangement
- The issue must be at least one year past its filing due date
Apply through My Account, Represent a Client, fax or mail; the CRA offers a pre-disclosure callback first. A refusal can't be objected to, only sent for a second administrative review or a Federal Court judicial review.
We go through eligibility and paperwork step by step, including how to apply for the VDP, in our full VDP guide.
What if you can't pay what you owe?
File anyway. Not being able to pay is not a reason to keep a return unfiled: filing stops the late-filing penalty from growing, and the CRA will set up a payment arrangement for what you owe. If the delay came from something beyond your control, or the interest itself is the problem, you can also ask for taxpayer relief.Payment arrangements
- Online: in My Account, choose "Proceed to pay", then "Schedule a series of payments" to set up pre-authorized debits from your bank account. An authorized legal representative can do this through Represent a Client.
- By phone: use the CRA's automated TeleArrangement line for personal income tax debt at 1-866-256-1147, or call the debt line at 1-888-863-8657 to speak to an agent.
- Work out what you can afford first. The CRA has a personal income and expense worksheet for this. An arrangement you can't keep up is worse than a smaller one you can.
The conditions are simple but strict. Interest keeps running on the balance during the arrangement. You must file all future returns on time. The CRA may also keep refunds and benefit payments and apply them to your debt. If you'll miss a payment, call before you do.
Taxpayer relief requests (RC4288)
The CRA can cancel or waive penalties and interest when:
- extraordinary circumstances stopped you from filing or paying, such as serious illness or an accident, a death in the immediate family, serious emotional or mental distress, a flood or fire
- financial hardship means you genuinely can't pay. For example, interest is a large part of the debt and a reasonable payment arrangement isn't possible, or paying would leave you unable to cover food, medical care, transport or housing for a long time
- the CRA's own actions caused the delay
Apply online in My Account under "Request relief of penalties and interest", or by mail using Form RC4288. Only penalties for tax years ending in the previous 10 calendar years, and interest that built up in those 10 years, can be considered. Relief never cancels the tax itself. Be patient: the CRA currently says requests take about 16 months on average.
The VDP is for coming forward; taxpayer relief is for when life genuinely got in the way. Some people qualify for both.
What does catching up look like with an accountant?
With an accountant, catching up is usually four steps: authorize them to see your CRA records, pull every slip the CRA has, rebuild and file the missing years oldest first, then deal with any balance through the VDP, a payment arrangement or a relief request. You give them documents and answers. They deal with the CRA.Step by step
- Authorize your representative in My Account. It takes minutes.
- Find out where you stand: which years are unfiled, any CRA assessments, balances, letters or demands to file. This decides whether the VDP is still unprompted for you.
- Pull every slip with Auto-fill My Return and Represent a Client.
- Rebuild the gaps: self-employment income and expenses, rent, childcare, medical. You should hear plainly what's reasonable to claim without receipts and what isn't.
- Choose the route: normal filing, or the VDP if there's a real balance and you qualify.
- File oldest first, usually all years together, with carry-forwards checked.
- Sort out the balance: pay, set up an arrangement you can keep, request relief where it fits.
- File the next return on time, which also keeps any arrangement in good standing.
What it costs
Fees depend on how many years are missing and how complex each one is. A T4-only year is very different from a year of rideshare income with no records. See our pricing page for current rates, or file your late tax returns with us and we'll quote you before any work starts.
If you're a rideshare or delivery driver, the missing piece is often HST as well as income tax. See behind on Uber HST returns for that side of the catch-up.
Key dates and numbers
*Last reviewed: October 28, 2026. Year-specific figures; we check these at least every January.*| Item | Figure | Source |
|---|---|---|
| Late-filing penalty (first time) | 5% of balance owing + 1% per full month late, max 12 months | CRA: Interest and penalties on late taxes |
| Repeat late-filing penalty | 10% + 2% per full month late, max 20 months (after a penalty in any of the 3 prior years and a demand to file) | CRA: Interest and penalties on late taxes |
| Interest rate on overdue tax, Oct 1 – Dec 31, 2026 | 7%, compounded daily (changes quarterly) | CRA: Prescribed interest rates, Q4 2026 |
| Refund limit | 10 calendar years after the end of the tax year (2016 is the oldest year refundable in 2026) | CRA: Changing a tax return |
| Penalty and interest relief window | Penalties for tax years ending in the 10 calendar years before your request; interest that built up in those 10 years | CRA: Cancel or waive penalties and interest |
| NETFILE years open | 2018–2025 original returns, until January 29, 2027 | CRA: NETFILE overview |
| VDP relief (applications from Oct 1, 2025) | Unprompted: 100% penalties, 75% interest. Prompted: up to 100% penalties, 25% interest | CRA: VDP review and decision |
| VDP years required (Canadian income) | Last 6 years | CRA: How to apply to the VDP |
| CPP filing trigger for self-employed | Net self-employment + pensionable employment income over $3,500 | CRA: Who has to file a return |
| Taxpayer relief average processing time | About 16 months | CRA: Cancel or waive penalties and interest |
| GST/HST credit | Renamed Canada Groceries and Essentials Benefit, July 2026 | CRA: GST/HST credit – no longer available |
| CRA individual enquiries | 1-800-959-8281 | CRA: Individual income tax enquiries line |
| CRA non-filer helpline | 1-800-448-0444 | CRA: Unfiled tax returns |
| TeleArrangement (personal tax debt) | 1-866-256-1147 | CRA: Arrange to pay your debt over time |
What we see with clients [OWNER: add a real anonymised example — e.g. how many years a client was behind, what the CRA had already assessed, the route taken (normal filing vs VDP), and the outcome. Leave this box out entirely rather than invent one.]
FAQ
Can I file several years of back taxes at once? Yes. You can file all your missing years at the same time. You don't have to wait for one year to be assessed before sending the next. Send them in date order, oldest first, so carry-forward amounts flow correctly.
Can I still file online if I haven't filed in years? Usually, yes. NETFILE currently accepts original returns for 2018 to 2025, until January 29, 2027. Returns for 2017 and earlier have to be filed on paper, or through a professional's software where it allows.
Will I go to jail for not filing taxes in Canada? It's very unlikely for people who come forward. Prosecution is the CRA's last step, after letters, demands, visits and assessments have all failed to get the returns. Filing, especially before the CRA contacts you, takes you off that path, and an accepted VDP application gives formal protection from prosecution.
The CRA already assessed me without my return. Can I still file? Yes, and you usually should. A subsection 152(7) assessment leaves out deductions and credits the CRA doesn't know about. When you file your own return for that year, the CRA reviews it and issues a reassessment.
Will I lose my refund if I wait too long? Yes, after 10 calendar years. A refund for 2016 can't be paid after December 31, 2026, so file your oldest refund year first.
Do I need an accountant to catch up? No. You can file old returns yourself. An accountant mostly saves time with several years of slips, self-employment income, a CRA letter with a deadline, or a VDP decision, where mistakes cost more than the fee.
Sources
- Canada Revenue Agency, Interest and penalties on late taxes – Personal income tax: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/interest-penalties/late-filing-penalty.html
- Canada Revenue Agency, Unfiled tax returns (Non-Filer Program): https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/unfiled-tax-returns.html
- Canada Revenue Agency, Who has to file a return: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/you-have-file-a-return.html
- Canada Revenue Agency, Changing a tax return: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/change-your-return.html
- Canada Revenue Agency, Prescribed interest rates – Interest rates for the fourth calendar quarter (2026): https://www.canada.ca/en/revenue-agency/services/tax/prescribed-interest-rates/2026-q4.html
- Canada Revenue Agency, Prescribed interest rates (2023–2026 quarters): https://www.canada.ca/en/revenue-agency/services/tax/prescribed-interest-rates.html
- Canada Revenue Agency, GST/HST credit – No longer available: https://www.canada.ca/en/revenue-agency/services/child-family-benefits/gst-hst-credit.html
- Canada Revenue Agency, How to get the benefit – Canada Groceries and Essentials Benefit: https://www.canada.ca/en/revenue-agency/services/child-family-benefits/canada-groceries-essentials-benefit/get-benefit.html
- Canada Revenue Agency, Keep getting your payments – Canada child benefit: https://www.canada.ca/en/revenue-agency/services/child-family-benefits/canada-child-benefit/get-payments.html
- Government of Ontario, Ontario Trillium Benefit: https://www.ontario.ca/page/ontario-trillium-benefit
- Canada Revenue Agency, Get a copy of your slips: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/tax-slips/a-copy-your-tax-slips.html
- Canada Revenue Agency, Individual income tax enquiries line: https://www.canada.ca/en/revenue-agency/corporate/contact-information/individual-income-tax-enquiries-line.html
- Canada Revenue Agency, Auto-fill My Return for professional tax preparers: https://www.canada.ca/en/revenue-agency/services/e-services/about-auto-fill-return.html
- Canada Revenue Agency, NETFILE overview: https://www.canada.ca/en/revenue-agency/services/e-services/digital-services-individuals/netfile-overview.html
- Canada Revenue Agency, Changes to the Voluntary Disclosures Program: https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/voluntary-disclosures-program/changes-vdp.html
- Canada Revenue Agency, Our review and decision – Voluntary Disclosures Program: https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/voluntary-disclosures-program/review-decison-vdp.html
- Canada Revenue Agency, How to apply – Voluntary Disclosures Program: https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/voluntary-disclosures-program/how-apply-vdp.html
- Canada Revenue Agency, Arrange to pay your debt over time: https://www.canada.ca/en/revenue-agency/services/payments/payments-cra/payment-arrangements.html
- Canada Revenue Agency, Cancel or waive penalties and interest (who can apply; how to apply; Form RC4288): https://www.canada.ca/en/revenue-agency/services/about-canada-revenue-agency-cra/complaints-disputes/cancel-waive-penalties-interest/who-can-apply.html and https://www.canada.ca/en/revenue-agency/services/about-canada-revenue-agency-cra/complaints-disputes/cancel-waive-penalties-interest/how-to-apply.html
- Justice Laws, Income Tax Act, section 152 (subsection 152(7)): https://laws-lois.justice.gc.ca/eng/acts/I-3.3/section-152.html
Every situation is different. This is general information, not advice for your file.
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Ready to get caught up? Tell us how many years are missing and whether the CRA has written to you. We'll tell you the order to file in, whether the VDP fits, and what it will cost. No lectures. [Book a free 15-minute call]
Related
- Personal tax returns, including late and back-year filing
- How far back can you file taxes in Canada?
- The CRA Voluntary Disclosures Program: when it helps with unfiled returns
- CRA late-filing penalty: how it's calculated and how to get it reduced
