TFSA Over-Contribution Penalty Canada — How to Fix It

Accidentally contributed too much to your TFSA? Here's exactly what the penalty is, how it accrues, and the fastest way to resolve it with the CRA.

The Penalty: 1% Per Month on the Excess

If you contribute more than your available TFSA contribution room, the CRA charges a tax equal to 1% per month on the highest excess TFSA amount in each month that you are over-contributed. This is not an annual 1% — it is 1% every single month the excess remains in your account.

How Over-Contributions Happen

The most common causes of TFSA over-contributions include:

• Re-contributing a withdrawal in the same calendar year — You withdraw $100 in June and re-contribute $100 in September, not realizing that room doesn't restore until January 1
• Multiple TFSAs at different institutions — Contributing the maximum at one bank without realizing you've already contributed elsewhere
• Misreading the CRA balance — The CRA's My Account shows last year's data; it doesn't reflect current-year contributions
• Not accounting for prior over-contributions — An existing penalty from a previous year means your room is already reduced

How the CRA Calculates the Penalty

The penalty is calculated on a month-by-month basis. The CRA looks at the highest excess amount in each calendar month and charges 1% of that amount. You report this on Form RC243 (Tax-Free Savings Account Return) by June 30 of the following year.

How to Fix a TFSA Over-Contribution

The fastest way to stop the penalty from growing is to withdraw the excess amount immediately. The moment the excess is gone, the monthly penalty stops accruing. Steps:

• Log into CRA My Account and confirm your available room and contribution history
• Calculate exactly how much you've over-contributed
• Withdraw at least that amount from your TFSA as soon as possible
• File Form RC243 by June 30 of the following year to report and pay the accrued penalty

Can You Get the Penalty Waived?

In some cases, yes. The CRA has discretion to waive or cancel the over-contribution tax if the over-contribution arose from a reasonable error and you withdraw the excess quickly. To request a waiver, submit a letter to the CRA explaining the circumstances along with proof that you've corrected the over-contribution. There is no guarantee of a waiver, but first-time errors that are corrected promptly are often treated favourably.

The Same-Year Withdrawal Trap in Detail

This is the #1 cause of TFSA penalties in Canada. Suppose you have $7,000 in unused room on January 1. You contribute $7,000 in March. Now your room is $0. In July, you withdraw $5,000 for a vacation. Your room is still $0 for 2025 — the $5,000 does not come back until January 1, 2026. If you deposit $5,000 back in November, you are $5,000 over your room for the rest of 2025. That's potentially 2 months of penalties before the year ends.

Prevention: The Best Strategy

• Check your CRA My Account contribution room before every contribution
• Keep a personal TFSA ledger tracking all deposits and withdrawals
• Never re-contribute a same-year withdrawal unless you have unused prior-year room
• If you hold TFSAs at multiple banks, total all contributions before depositing more
• Sign up for CRA My Account alerts to stay on top of your room