When Too Much of a Good Thing Costs You: RRSP Excess Contributions

Contributing to your registered retirement savings plan (RRSP) usually feels like an easy win: contribute, reduce your taxable income, and move on.

But what happens when the contribution is too much?

Take Alex. They are 45, earn $90,000 a year, and want to be proactive with retirement savings.

In April 2026, they contribute $20,000 to their RRSP, assuming there is plenty of room. Months later, while preparing for their 2026 tax filings, they realize their actual RRSP deduction limit – shown on their latest Notice of Assessment – was only $14,500. Assume Alex had no unused RRSP, PRPP, or SPP contributions carried forward from prior years, no other 2026 contributions, and no withdrawals before year-end.

Alex has contributed $5,500 more than their limit. And the clock has been ticking since April.

What just happened?

If you or your employer have contributed to your RRSP/PRPP/SPP more than your deduction limit allows, you have an excess contribution. Spousal contributions that you have made to your spouse’s RRSP are also considered as part of your own contribution limits (not your spouse’s).

Your RRSP deduction limit and your unused RRSP contribution room are related but not the same thing: your deduction limit is the maximum you can deduct, while excess contribution analysis also accounts for any unused contributions carried forward from prior years. CRA directs taxpayers to determine excess contributions by comparing unused contributions to their RRSP deduction limit and completing T1-OVP where required. Your deduction limit is shown on your latest Notice of Assessment or Form T1028.

There is one built-in buffer: if you were 18 or older at any point during the year, CRA allows an additional $2,000 over your deduction limit before the penalty kicks in. This buffer exists as a tolerance for minor miscalculations, but it is not deductible. The taxpayer may choose to leave it in the RRSP and deduct in a future year when the new room arises.

For Alex, the $2,000 buffer applies, leaving $3,500 as the amount subject to Part X.1 tax.

What does this actually cost?

CRA charges a tax of 1% per month on excess contributions above the $2,000 buffer, for each month the excess exists.

For Alex, the excess has been sitting since April 2026. By December (inclusive of 9 months) the penalty looks like this:

Excess subject to penalty: $5,500 − $2,000 = $3,500,
Penalty: $3,500 × 1% × 9 months = $315.

It may not sound catastrophic at first. But every additional month of inaction adds $35, and if Alex doesn’t file the required T1-OVP on time, late-filing penalties stack on top.

Note: The 1% tax stops once the excess is eliminated – either by withdrawing the excess amount, or because new RRSP deduction room arises. New room created in a future year (for example, on January 1 when the annual limit is added) can reduce or eliminate the excess for subsequent months, depending on the T1-OVP calculation. This is relevant if the excess remains into the next year.

The 1% tax may not apply in all cases. For example, where the excess was withdrawn before the end of the month in which it was made, or where contributions were qualifying group plan amounts. If timing is close to month-end, this is worth careful review.

How can this be fixed?

Commonly, the fix involves withdrawing or otherwise eliminating the excess and filing T1-OVP if Part X.1 tax applies.

Step 1: Withdraw the excess contribution

The withdrawal can be made directly through the institution holding the RRSP, or by submitting Form T3012A to CRA. An approved T3012A allows the issuer to refund unused contributions without withholding tax. Direct withdrawal usually results in withholding, and the taxpayer may then claim the T746 deduction on the T1, if eligible. CRA confirms T3012A is used for a tax deduction waiver on refund of the unused RRSP contribution.

Note that T3012A processing can take several weeks – if speed matters, going through the issuer directly is faster.

Withdrawals made through the issuer are subject to withholding tax. The rate is applied to the full withdrawal amount, not on a graduated basis:

10% on amounts up to $5,000,
20% on amounts over $5,000, up to $15,000, and
30% on amounts over $15,000.

For Alex, withdrawing $5,500:

20% on the full $5,500 = $1,100 withheld, and
Net received: $4,400.

Note: This is presuming that Alex is a Canadian resident outside Quebec and no approved T3012A. Quebec residents’ withholding tax rates are lower as Revenu Quebec separately withholds and remits provincial income tax:

5% on amounts up to $5,000,
10% on amounts over $5,000, up to $15,000, and
15% on amounts over $15,000.

The withholding on withdrawal is not the 1% excess contribution tax, it is prepayment of income tax on the RRSP withdrawal itself. These are two separate obligations.

Step 2: File Form T1-OVP

The T1-OVP calculates the exact penalty owing based on month-by-month contributions and withdrawals. It is filed separately from the T1 return, and the deadline is 90 days after year-end; for a 2026 excess, that is March 31, 2027, ahead of the T1 deadline. Where, both the T1-OVP and any balance owing is due by this date.

Filing late triggers an additional penalty of 5% of the balance owing, plus 1% per month to a maximum of 12 months. The penalty is higher if CRA has assessed a late-filing penalty on a T1-OVP return for any of the three prior years.

When filing the T1-OVP, supporting documents should be included. Specifically, bank statements confirming the exact dates of contributions and withdrawals. RRSP receipts and T4RSP slips alone do not show this date-level detail and are not sufficient on their own.

Note: Withdrawals made under the Home Buyer’s Plan or Lifelong Learning Plan do not necessarily eliminate an excess contribution for these purposes. CRA specifically notes that if excess amounts were withdrawn under HBP or LLP, the 1% tax may still apply.

Is any portion of this recoverable?

Yes, and this step is easy to miss.

When Alex withdrew $5,500, the full amount is added back to their 2026 income. Without relief, they would pay income tax on money they never actually benefited from – money that was returned to them specifically because it shouldn’t have been in the RRSP in the first place.

Form T746 on the T1 return fixes this. It may allow a deduction for all or part of the withdrawal from taxable income. The $1,100 withheld at source is credited against Alex’s tax owing like any other source withholding – it is not lost.

Note: T746 can only be claimed in the year the withdrawal was made.

Can the penalty be waived?

CRA can waive or cancel the 1% penalty tax if both of the following conditions are met:

The excess contributions arose due to a reasonable error, and
The taxpayer is taking, or has taken, reasonable steps to eliminate the excess.

To request relief, complete Form RC2503 and provide documentation of all contributions and withdrawals for the years involved, along with a written explanation of why the error occurred and what steps were taken to fix it.

A waiver applies to tax not yet assessed; a cancellation applies to tax already charged.

Does Alex qualify?

Probably not – and a recent Federal Court decision makes that clear.

In Lucas v. Attorney General of Canada (2025), the court upheld CRA’s denial of penalty relief where a taxpayer contributed based on the wrong Notice of Assessment year and did not identify the error until years later. The court found that having the correct information available, but failing to verify it, does not meet the “reasonable error” threshold.

On these simplified facts, relief for Alex would be difficult because the correct deduction limit was available on the NOA and there is no third-party or CRA error described.

Conclusion: Verify before you contribute

Before making any RRSP contribution, confirm your deduction limit on your most recent Notice of Assessment, or through CRA My Account. It takes two minutes and costs nothing.

The alternative, as Alex learned, costs considerably more.

When verifying your deduction limit, keep in mind that pension adjustments, past service pension adjustments, employer group RRSP contributions, PRPP contributions, or SPP contributions can all affect your available room. Gross income percentages alone are not a reliable guide.

Note: RRSP contributions made in the first 60 days of the year are reported on the prior year’s Schedule 7 for deduction purposes, but they still use available RRSP room. This is why checking the most recent Notice of Assessment matters – it may not reflect those contributions.

When Too Much of a Good Thing Costs You: RRSP Excess Contributions