Updated Checked by the Tax-Services.ca editorial team How we check
Catch-up bookkeeping means someone sorts out months or years of unrecorded transactions so your returns can be filed. The clock matters, because late filing costs money: the CRA adds a penalty of five percent of what you owe, then one percent more for every full month that passes, capped at a year. Interest comes on top. If you’re behind, the first job isn’t hiring anyone. It’s finding out what’s actually missing.
What does catch-up bookkeeping involve?
It’s the same work as normal bookkeeping, just done late and in bulk. You collect the raw records, match them to bank and card statements, sort each item into a category, and then produce the reports and figures your returns need. The hard part is usually missing paper: lost receipts, invoices in a former employee’s inbox, statements from closed accounts.
We couldn’t confirm what firms charge for this, or how long a backlog takes, so we won’t quote either. Ask for a written scope and a fixed price or a cap before any work starts.
What does being late cost?
The table sets out the penalties we could confirm on official pages. Interest is separate and builds daily on any unpaid balance.
| Return | First late filing | Repeat late filing |
|---|---|---|
| Personal income tax (T1) | 5% of the tax owing, then 1% a month for up to 12 months | 10%, then 2% a month for up to 20 months |
| GST/HST | 1% of net tax owing, then a quarter of that 1% for each complete month, up to 12 | Not confirmed here |
The higher T1 rate hits people who were already penalized in one of the three earlier years after a CRA demand. On GST/HST, no penalty applies if you owe nothing or are due a refund.
Here’s how that plays out. Say you owe $5,000 on a personal return and file four full months late. That’s $250 up front and $50 for each of the four months, so $450. On a GST/HST return with $4,000 of net tax owing, three months late costs $40 plus three times $10, so $70. Small next to a cheque you might owe, but the amounts grow every month.
How do you get started?
Begin with a list of every return that’s overdue: income tax, GST/HST, payroll remittances, T4s. Then gather bank and credit card statements for the whole gap, the sales invoices you issued, and anything you can find on expenses.
Work from the oldest period forward. Reconciling each month to a statement catches errors early, before they spread. For sales tax, the HST reverse calculator backs the tax out of old tax-included receipts. For staff, the payroll remittance calculator shows what each pay period should have sent in, so you can compare it with what you actually sent.
Can the penalties be reduced?
Sometimes. The Voluntary Disclosures Program lets you file a return you should have filed without prosecution and, in some cases, without some penalties, if you come forward first. To qualify the application has to be voluntary, made before the CRA takes compliance action, complete, involve a penalty, and cover information at least one year past due. You’ll still owe the tax and interest. The CRA changed the program on October 1, 2025, and we couldn’t confirm the new relief levels, so read its page before you apply.
There’s also a taxpayer relief request, form RC4288, for penalties and interest. The CRA looks at years ending in the last 10 calendar years. It says you’re generally responsible for errors made by a representative, though relief may be granted in exceptional situations. Don’t plan on it.
Common mistakes
Waiting for perfect books before filing anything is the classic one. Where a penalty grows monthly, filing a reasonable return sooner is often better than a perfect one later. You can change a return afterwards. Another is mixing personal and business spending in the backlog, which doubles the sorting time. And watch out for throwing records away: the CRA generally wants you to keep them six years from the end of the last tax year they relate to.
Once the backlog is clear, run the self-employed tax calculator on your net income to see what you’ll owe and set money aside. Then keep up monthly, which is far cheaper than doing it again.
Where the numbers come from
Penalty rules come from the Canada Revenue Agency’s pages on late-filing penalties, GST/HST filing penalties, the Voluntary Disclosures Program and taxpayer relief, as read in 2026. The $450 and $70 examples apply those published formulas, and the CRA sets the final amount on your notice.
Frequently asked questions
What is catch-up bookkeeping?
It is bookkeeping done late and in bulk: gathering records, matching them to bank statements, categorizing them and producing the figures needed for overdue returns.
What is the CRA late-filing penalty for a personal return?
Five percent of the balance owing, then 1% for each full month late, capped at 12 months. Repeat offenders pay 10%, then 2% a month, capped at 20 months.
What is the GST/HST late-filing penalty?
One percent of the net tax owing, plus a quarter of that amount for every complete month overdue, up to 12 months. Nothing applies if you owe nothing.
Can I avoid penalties if I come forward on my own?
The Voluntary Disclosures Program can give relief from prosecution and, in some cases, penalties, if the application is voluntary and complete. You still pay tax and interest.
How much does catch-up bookkeeping cost?
We couldn't confirm typical fees. Ask for a written scope and a fixed price or cap before work begins.
- Self-employed taxes in Canada: income, CPP and GST
How tax works when you are self-employed in Canada: reporting income and expenses, paying both halves of CPP, instalments and when to register for GST
Information only. This page is general information, not tax, legal or accounting advice. Tax-Services.ca is an independent publisher: we don't prepare or file tax returns or offer tax services, and we have no connection with the CRA, Revenu Québec, any government or any company named on this page. Check the figures that matter with an official source or a qualified professional.