Use this calculator to determine exactly how much you owe in TFSA over-contribution penalty taxes. Enter the amount you are over your limit, the month the over-contribution started, and when (or if) you withdrew the excess — the calculator shows your total penalty and a month-by-month breakdown.
How the TFSA penalty works
The Canada Revenue Agency (CRA) imposes a penalty tax of 1% per month on TFSA over-contributions. The penalty is calculated on the highest excess amount at any point during each month and applies every month the excess remains in the account.
Unlike RRSPs, there is no $2,000 over-contribution buffer for TFSAs. The penalty begins immediately from the first dollar over your contribution limit.
Penalty formula
$$\text{Monthly Penalty} = \text{Excess Amount} \times 1%$$
$$\text{Total Penalty} = \text{Monthly Penalty} \times \text{Number of Months}$$
The penalty accumulates from the month the over-contribution occurs through December of that tax year, or until the excess is withdrawn — whichever comes first. If the excess carries into the next calendar year, a new penalty period begins.
Example calculation
You over-contribute $3,000 to your TFSA on August 15, 2025. You withdraw the excess on October 20, 2025.
| Month | Excess | Penalty |
|---|---|---|
| August | $3,000 | $30 |
| September | $3,000 | $30 |
| October | $3,000 | $30 |
| Total | $90 |
The penalty applies for August, September, and October (3 months) because the excess was present during those months. Even though you withdrew on October 20, the penalty still applies for the full month of October because the excess existed at some point during that month.
What causes TFSA over-contributions
1. Re-contributing withdrawals in the same year
This is the #1 cause of TFSA penalties. When you withdraw money from your TFSA, the withdrawn amount is added back to your contribution room on January 1 of the following year — not immediately.
Example: In April 2025, you withdraw $15,000 from your TFSA. In September 2025, you re-deposit $15,000. If you had $0 unused room before the re-deposit, you are now $15,000 over your limit and owe $150/month in penalties through December ($600 total).
The correct approach is to wait until January 2026, when the $15,000 plus the new annual limit will be added to your room.
2. Contributions across multiple accounts
Your TFSA contribution limit applies to all of your TFSA accounts combined — not per account. If you have TFSAs at three banks, the total contributions across all three must not exceed your available room. Financial institutions do not communicate with each other, so it is your responsibility to track the total.
3. Incorrect transfers between institutions
If you want to move your TFSA from one bank to another, you must use a direct institutional transfer. If you withdraw from Bank A and deposit into Bank B yourself, the CRA treats it as a withdrawal followed by a new contribution. The withdrawal amount will not be added back to your room until the following January, potentially creating an over-contribution.
4. In-kind contributions
When you transfer investments (such as stocks) into your TFSA, the contribution is valued at the fair market value on the day of transfer. If the stock price has risen since you checked, the contribution may be larger than expected and could push you over your limit.
5. Outdated CRA records
CRA My Account shows your contribution room, but this information can be months out of date. Financial institutions report TFSA transactions annually, and the CRA processes these reports by April of the following year. Do not rely solely on CRA numbers — track your own contributions and withdrawals throughout the year.
How to fix an over-contribution
- Withdraw the excess immediately — the penalty stops accruing for future months once the excess is removed (but still applies for the months it was present)
- File a TFSA Return (Form RC243) — due by June 30 of the year following the over-contribution
- Pay the penalty tax — include payment with your RC243 filing
- Request a waiver if applicable — if the over-contribution was due to a reasonable error (bank mistake, transfer processing delay, unexpected in-kind valuation), write to the CRA explaining the circumstances
The CRA may cancel or waive the penalty if you demonstrate that the over-contribution was not intentional and that you corrected it promptly. However, the waiver is discretionary — it is not guaranteed.
Filing the TFSA return (Form RC243)
You must file Form RC243 (TFSA Return) if any of the following apply:
- You made over-contributions to your TFSA during the year
- You held non-qualified or prohibited investments in your TFSA
- You received an advantage related to your TFSA
The filing deadline is June 30 of the year following the tax year in question. For example, the deadline for 2025 over-contributions is June 30, 2026.
If you do not owe a penalty and did not hold non-qualified investments, you do not need to file this return.
Over-contribution penalty vs RRSP
| Feature | TFSA | RRSP |
|---|---|---|
| Penalty rate | 1% per month | 1% per month |
| Over-contribution buffer | None ($0) | $2,000 |
| Penalty on | Highest monthly excess | Excess over $2,000 buffer |
| Reporting form | RC243 | T1-OVP |
| Filing deadline | June 30 (following year) | 90 days after year-end |
The key difference is that RRSPs provide a $2,000 lifetime over-contribution buffer with no penalty. TFSAs have no buffer at all — even $1 over the limit triggers the 1% monthly penalty.
How to check your contribution room
You can check your TFSA contribution room in several ways:
- CRA My Account — log in online to see your available room (may be delayed)
- Notice of Assessment — your room is listed on your annual tax assessment
- Call the CRA — phone 1-800-959-8281 for personal tax inquiries
- Calculate it yourself — use our TFSA Contribution Room Calculator for an instant calculation
We recommend tracking your own contributions and withdrawals throughout the year rather than relying solely on CRA records.
Related TFSA tools
- TFSA Contribution Limit & Room Calculator — Calculate your exact available TFSA contribution room for 2025
- TFSA Calculator — Project how your TFSA investments will grow over time with tax-free compounding
- RRSP Calculator — Compare TFSA and RRSP retirement savings strategies
- Income Tax Calculator — Determine your marginal tax rate for TFSA tax savings estimates