Haven't Filed Taxes in Years? How to Catch Up in Canada

What happens if I don't file my taxes in Canada?

Missing a required Canadian personal return can leave tax and interest unpaid, stop benefit payments, and prompt CRA enforcement. The CRA's Non-Filer Program may send a letter, demand returns, assess tax without them, and consider prosecution after other attempts fail.

The CRA can assess tax when no return was filed. Filing the missing return gives the CRA your actual income and claims to review; it does not erase an assessment by itself. Keep every letter and notice so you can match each filing to the correct year and deadline.

Is there a penalty if I didn't owe anything?

The ordinary federal late-filing penalty is based on tax unpaid when the return was due. If none was unpaid then, that penalty is zero even if you file late. A CRA demand can still require you to file, and missing returns can delay benefits or refunds (Income Tax Act, section 162; CRA: who has to file).

If you owe tax, the CRA charges interest on the unpaid balance. A formal demand for the current return plus a late-filing penalty for any of the 3 preceding tax years can trigger a higher repeat penalty (Income Tax Act, section 162). Penalties, interest and relief covers the calculation and possible relief.

How many years back do I have to file?

There is no blanket rule that lets you ignore required returns after a set number of years. Check each missed year separately: tax owing, a CRA request, self-employment CPP contributions, a capital-property sale, or a claim for benefits or a refund can make a return necessary or useful (CRA: who has to file). The CRA can assess an unfiled year even when it is old.

The refund clock is different from the filing duty. For an individual return filed more than three years after the tax year, the CRA may refund an overpayment if the return is filed within ten calendar years after that year ends; relief is discretionary. Beyond that limit, the CRA says it has no authority to grant the late-return refund (Income Tax Act, section 164; CRA: limitation period).

If you lived abroad during a missed year, first determine whether Canada treated you as a resident and whether you had a Canadian filing duty; see Canadian tax residency. If you were a Québec resident, check the separate Québec return obligation as well as the federal T1 (Revenu Québec).

Which year should I file first?

First meet any current filing deadline or date in a CRA demand. Then prepare the remaining required years from oldest to newest, so earlier income, losses and carryforward amounts can be reflected in later returns (CRA: items that make a return necessary). This is a practical filing order, not a CRA rule requiring a particular submission sequence.

Move a year with a possible refund near its ten-year limit to the front of the preparation queue. For each year, record the province or territory of residence, income sources, marital status, dependants, tax slips, business records and any CRA notice. Use the package for that year and place of residence; do not apply a current-year form to an older return.

How do I get old T4s and other tax slips?

Ask the issuer for a missing slip, then check CRA My Account if you can sign in. The CRA cannot provide a slip it has not received; government pension and employment insurance slips may be available through Service Canada (CRA: get a copy of your slips). If years of missed returns prevent account registration, use issuer copies and your records; a BC or Alberta provincial partner may also let you sign in.

Slips are a starting point, not a complete record of income or deductions. Gather pay stubs, bank and investment statements, receipts, prior notices, and business invoices and expenses where relevant. If you rented property, gather rent and expense records for each year; see Rental income for how to report them (CRA: Form T776). If a slip cannot be obtained, the CRA allows a reasonable estimate from supporting records and explains what note and documents to keep or attach. Québec filers should also gather their Québec slips and check the data available through Revenu Québec.

Can I file old returns online, or only on paper?

Some old federal T1 returns can be sent through NETFILE; older ones must use the paper return for that tax year. The CRA's published NETFILE year list changes with filing seasons, so check it before preparing several years.

Will I still get refunds and benefits for the years I missed?

You may receive an eligible refund or missed benefits after the CRA assesses the returns, but neither is automatic. The CRA can withhold an income-tax refund until you file other required returns it knows about, including GST/HST returns. The federal late-return refund rule has the ten-year limit and discretionary relief described above; benefit entitlement depends on the program and your facts.

For the Canada child benefit, file your return each year; a Canadian-resident spouse or common-law partner should also file, even with no income. If a spouse was non-resident for any part of a year, the benefit recipient should sign Form CTB9 for each affected year, even if that spouse had no income, and check separately whether they must file a Canadian return. Late filing can stop payments temporarily; eligible missed amounts may be paid after assessment (CRA: keep getting payments). If you never applied for a child, apply separately: older months face a ten-year statutory limit, and an application covering a period that started more than 11 months ago needs supporting documents. Check marital status, custody and address for each missed year before estimating any amount.

If you missed the former GST/HST credit, now the Canada Groceries and Essentials Benefit, a late return may lead to an eligible retroactive payment. Check the benefit notice after assessment.

The CRA sent me a demand to file or an arbitrary assessment: what now?

Read the notice, identify the years and due date, and respond promptly. A CRA demand makes the return legally required; if you cannot meet its deadline, contact the officer using the notice details while you assemble the records.

An assessment made without your return may omit deductions that depend on facts the CRA does not have. Prepare the actual return with supporting records: the CRA says it will review that return and issue a reassessment. If you disagree with the assessment, check the T1 objection deadline now: the later of 1 year after that return's filing deadline or 90 days after the notice date. Do not wait for the reassessment. Keep proof of each submission and do not assume the estimated balance disappears until the reassessment arrives. If the CRA has begun a review or audit, see Reviews, audits and voluntary disclosure for the response process.

I was self-employed: do I also have to file old GST/HST returns?

If you were registered for GST/HST, file a return for every assigned reporting period, including periods with no activity or net tax to remit (CRA: GST/HST reporting requirements). Your personal T1 does not replace those returns.

If you should have registered but did not, the date registration was required needs its own review; see When to register for GST/HST. For the income-tax side, see How self-employed income is taxed.

What if I can't pay what I owe?

File the missing returns even if you cannot pay in full. Filing stops further delay in establishing the correct balance; payment and interest remain separate issues (CRA: late taxes).

Once you know the assessed debt, the CRA lets you arrange payments through your account or by phone. Have your notices and a realistic income-and-expense picture ready. A payment arrangement does not remove interest, and the CRA requires future returns and agreed payments to stay current. If a collections officer has written to you, use the contact on that letter promptly.

Should I use the Voluntary Disclosures Program for unfiled years?

The Voluntary Disclosures Program may be an option for a missed return, but eligibility and the effect of CRA contact depend on the facts; see Unreported income and voluntary disclosure before choosing a filing route (CRA: eligibility).

Example

Illustrative only; all amounts are Canadian dollars. A sole proprietor has three unfiled T1 years. In the middle year, business receipts were C$60,000 and documented expenses were C$20,000, leaving C$40,000 of business income before income tax and any pension contributions. The CRA has demanded the newest return by a stated date.

The proprietor first collects the demand, slips and account records, and prepares the newest return in time for that date. The other required returns are then prepared oldest to newest, using each year's forms. The business account is checked for missing GST/HST periods; the T1 alone does not satisfy them. No refund, tax balance or benefit amount can be concluded from these facts alone.

Different for you?

• You lived outside Canada during a missed year: establish that year's filing duty under Canadian tax residency.
• Your first year as a Canadian tax resident is unfiled: identify your arrival date and that year's income, then see First year as a Canadian tax resident before preparing the return (CRA: newcomers).
• You have several years owing, a demand, an assessment made without a return, or collection action: gather every CRA notice, tax slip and bank record, then seek tax preparation help before a response deadline passes.
• You want a penalty calculation or relief request: see Penalties, interest and relief.
• You omitted income or foreign property on returns already filed: see Unreported income and voluntary disclosure.
• Your corporation also missed returns: follow Catching up on unfiled corporate returns.
• Your self-employment may have required GST/HST registration: see When to register for GST/HST.
• The CRA has started a review or audit: see Reviews, audits and voluntary disclosure.
• You also missed US returns: see Catching up on missed US returns.
• Your missing years include foreign income: gather the foreign slips, returns and tax paid, then seek cross-border tax help to match the income to each year.