Updated Checked by the Tax-Services.ca editorial team How we check
Breaking accounting rules in Canada mostly costs you tax penalties, and they’re worked out from the tax you owe. A corporation that files its T2 late pays 5% of the tax it still owed on the due date, then 1% more for each full month of delay, and the monthly part stops at 12 months. Here, “accounting rules” means record keeping and tax reporting, since that’s what the CRA enforces. Accounting standards for financial statements are a different matter, and we couldn’t verify penalties for those.
What does a late T2 return cost?
The CRA starts at 5% of what was still owed on the due date. Each whole month of delay adds 1%, and the count stops at 12. Had a late-filing penalty in one of the three years before? Then the start is 10%, each month adds 2%, and the count runs to 20.
| Penalty | Base | Monthly add-on | Stops after |
|---|---|---|---|
| First late T2 | 5% | 1% | 12 months |
| Repeat late T2 (penalty in last 3 years) | 10% | 2% | 20 months |
Here’s what that means in dollars. Say a company owes $20,000 and files four months late. The first-time penalty is $1,000 plus $800, so $1,800. If the same company was penalized last year, it’s $2,000 plus $1,600, so $3,600. Let it run the full 12 months and the first-time penalty tops out at 17% of the tax, which is $3,400 on that $20,000. Interest on the unpaid tax comes on top, and the pages we read don’t give a current rate, so check the CRA for it.
Dates matter here. The T2 is due six months after the tax year ends, but the balance of tax is generally due two months after year end, as the CRA’s balance-due day page explains. Some Canadian-controlled private corporations get three months. Paying on the later date by mistake is a common way to start the interest clock.
Are there penalties for getting the numbers wrong?
Yes, and they’re steeper when the CRA sees carelessness. For gross negligence or false statements, the CRA charges whichever is bigger, $100 or half the tax that was understated. If a corporation understates $8,000 of tax that way, that’s $4,000. There’s also a repeated failure to report income penalty, which applies when unreported amounts of $500 or more show up in the current year and in any of the three years before.
A genuine mistake isn’t the same as gross negligence. But a pattern of mistakes can look like one, and that’s where good records earn their keep.
What if I don’t keep proper records?
The CRA requires you to keep business records for six years from the end of the last tax year they relate to. The CRA’s electronic records circular says failing to keep adequate records can lead to prosecution, with fines of not less than $1,000 or imprisonment. Most small businesses never get near that. The everyday cost is lost deductions and credits, because you can’t claim what you can’t show.
GST/HST has its own paperwork rule. For purchases of $500 or more, an input tax credit needs the supplier’s name, the date, the total, the tax charged, the supplier’s registration number and a description. No invoice, no credit. Run the GST/HST calculator on a purchase to see how much tax you’d be putting at risk. On a $2,000 Ontario purchase, for example, that’s $260 of HST you might not get back.
Do instalments and late payments add cost?
They can. When instalment interest passes $1,000, a penalty applies. It’s half the difference between your instalment interest and the greater of $1,000 or 25% of the interest you’d have owed with no instalments. That’s a formula worth reading twice. The corporate tax calculator estimates the year’s tax so you can size your payments, and the payroll remittance calculator covers the amounts withheld from staff.
What if you’ve already missed a deadline?
File now. The penalty grows with every full month, so a return sent in next week costs less than one sent in next season. If you can’t pay it all, pay what you can with the return, because the penalty is a percentage of the tax still unpaid and a partial payment shrinks the base. Then keep the paper trail: a copy of what you filed, the date, and proof of payment.
How do I avoid accounting non-compliance?
File on time even when you can’t pay. The late-filing penalty is tied to unpaid tax, so a return filed on time with a partial payment costs less than a return filed late. Keep invoices and bank records in one place, reconcile monthly and write down what you did about anything unusual. If an error is found late, say so early.
A bookkeeper or accountant is worth paying if you have employees, several tax accounts or a second year of late filings. Those are the situations where the repeat penalty rates start to bite.
Our sources
Penalty rates and formulas come from the Canada Revenue Agency‘s page on avoiding penalties for corporations. Record keeping rules come from the CRA’s records and electronic record keeping publications, and input tax credit rules from its GST/HST page, all read in September 2026. The balance-due dates come from the CRA page linked above. Dollar examples are our own arithmetic on those rates, and this site is independent of the CRA.
Frequently asked questions
What is the penalty for filing a T2 late?
The CRA charges 5% of the unpaid tax plus 1% for each full month late, up to 12 months. It's 10% plus 2% a month for repeat offenders.
What is the gross negligence penalty?
The CRA lists the greater of $100 or 50% of the understated tax for gross negligence or false statements.
How long do I keep business records?
Six years from the end of the last tax year they relate to, unless the CRA gives permission to destroy them earlier.
Can poor records lose me tax credits?
Yes. An input tax credit on a purchase of $500 or more needs specific supplier details. Without them you can't claim it.
Do these penalties apply to financial reporting standards?
We couldn't confirm penalties for accounting standards in financial statements. These figures cover tax filing and record keeping.
All family and benefits calculators
- 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