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I Over-Contributed to My RRSP — How to Fix It (Canada)

Updated

RRSP over-contributions happen more often than people realize — a miscalculated room amount, a spousal RRSP mix-up, or a transfer that was processed as a new contribution. Here’s what to do.

Understanding the $2,000 Buffer

Unlike the TFSA, the RRSP has a $2,000 lifetime buffer — a built-in cushion that lets you over-contribute by up to $2,000 without paying a penalty.

SituationResult
Over-contribution up to $2,000No penalty, but the excess cannot be deducted until you have room
Over-contribution over $2,0001% per month tax on the amount above $2,000

The $2,000 buffer is not a free zone — you still cannot deduct contributions for which you have no room. But you won’t face a monthly penalty on the first $2,000 of excess.

How the 1% Monthly Tax Works

The penalty applies to the highest excess amount in each month, on amounts exceeding the $2,000 buffer.

Example

Your RRSP deduction limit is $15,000. You accidentally contribute $19,000 — a $4,000 excess.

  • Buffer covers the first $2,000 (no penalty)
  • Remaining excess above buffer: $2,000
  • Penalty: 1% × $2,000 = $20/month until the excess is withdrawn

After 6 months before you notice and fix it: $120 total penalty.

Step 1: Check Your Deduction Limit

Your RRSP deduction limit appears on:

  • Your most recent Notice of Assessment (NOA) from CRA
  • My CRA Account → RRSP/FHSA section

This is the maximum amount you can deduct this year. Do not confuse your deduction limit with your contribution room — they are the same number but updated each spring based on the previous year’s return.

Step 2: Calculate Your Excess

Excess = All contributions to all RRSPs (yours and spousal) − your deduction limit

If the result is more than $2,000, you have a penalizable excess.

Contributions include:

  • Direct contributions
  • Transfers from pension plans (PA, PSPA values affect room)
  • Group RRSP employer contributions
  • Spousal RRSP contributions you made (they use YOUR room, not your spouse’s)

Step 3: Withdraw the Excess

To stop the penalty from accumulating, withdraw the excess amount from your RRSP.

The withholding problem: Your financial institution is required to withhold income tax on any RRSP withdrawal — even one made to fix an over-contribution. Use CRA Form T3012A (Tax Deduction Waiver on the Refund of Your Undeducted RRSP, PRPP, and SPP Contributions from Your RRSP) to apply for the institution to withhold $0 or a reduced amount. This form must be approved by CRA before the withdrawal.

Alternatively, you can withdraw with withholding tax applied, then claim a deduction on your T1 return to recover the withheld amount — the net result is the same, but it ties up cash in the interim.

Step 4: File Form T1-OVP

You must file Form T1-OVP (Individual Tax Return for RRSP, PRPP and SPP Excess Contributions) within 90 days of the end of the calendar year in which the over-contribution occurred.

For example: if you over-contributed in 2025, T1-OVP is due by March 31, 2026.

Late filing adds a penalty: 5% of the balance owing plus 1% per month late, up to 12 months.

Step 5: Pay the Penalty

Calculate the total penalty on T1-OVP and pay CRA by the filing deadline. Payment can be made through:

  • My CRA Account (online banking)
  • Your financial institution’s CRA bill payment
  • In person at a bank or Canada Post

Applying for Penalty Waiver

If the over-contribution was an honest mistake corrected promptly, apply for relief:

  1. Write a letter to your CRA tax centre
  2. Explain how the over-contribution occurred (e.g., you misread your NOA, your employer made a contribution you didn’t expect)
  3. Show that you withdrew the excess as soon as you discovered the error
  4. Request cancellation or waiver under taxpayer relief provisions

CRA regularly grants relief for first-time over-contributions where the taxpayer acted in good faith and corrected the situation quickly.

Common Causes to Avoid

Pension adjustments (PA): If you belong to a defined benefit pension plan, your RRSP room is reduced by your PA each year. If you contribute without accounting for this reduction, you may over-contribute.

Spousal RRSPs: Contributions to your spouse’s RRSP use YOUR contribution room. If you contribute to both your own RRSP and a spousal RRSP without checking your total room, you can exceed your limit.

Group RRSPs: Employer matching contributions and your payroll RRSP deductions both count against your room. Keep track of all contributions, not just the ones you initiate.