RRSP Contribution Carry Forward Rules: How They Work

The rules around RRSP contribution room

Registered Retirement Savings Plan (RRSP) contribution room accumulates as soon as you earn income that must be reported on a tax return — employment income, self-employment earnings, royalties, research grants and certain types of rental income all count. There is no minimum age to start building RRSP room: teenagers with part‑time jobs who file tax returns can begin accumulating contribution room immediately.

How RRSP carry‑forward works

Your unused RRSP room carries forward indefinitely. Each year you earn new RRSP room equal to 18% of the prior year’s earned income, up to that year’s maximum contribution limit. For 2024 the maximum new RRSP room that can be earned is $31,560 for taxpayers who had at least $175,333 of earned income in 2023. That annual entitlement is added to any unused room from previous years. For 2025 the maximum increases to $32,490, which requires at least $180,500 of earned income in 2024.

Note that your new RRSP room becomes available retroactively to January 1 once you file your previous year’s tax return. This means filing your 2023 return will make your 2024 RRSP room available.

If you participate in a workplace pension — either a defined benefit (DB) or defined contribution (DC) plan — your T4 slip will include a pension adjustment (PA). The PA reduces your RRSP room for the following year to reflect pension benefits accrued through the employer plan. In short, pension adjustments prevent someone with an employer pension from gaining a tax‑deferral advantage over someone without a pension.

Don’t double count your contribution room

Be careful not to double count. If your 2023 notice of assessment (NOA) shows $25,000 of available RRSP contribution room for 2024, that figure already reflects prior unused room and applicable adjustments. It does not, in addition, automatically give you a fresh $31,560 unless your 2023 earned income actually generated that much new room. If you are using an older NOA that reports your 2023 room before adjustments, remember that your 2023 contributions or a pension adjustment could have reduced that number.

If you are unsure, check the Canada Revenue Agency (CRA) My Account portal or call the CRA directly to confirm your current RRSP deduction limit and available contribution room.

Also note the timing rule for contributions: RRSP deposits made in the first 60 days of a calendar year are attributed to the previous tax year for reporting purposes. For example, contributions made up to and including February 29, 2024, are reported on your 2023 tax return. You may contribute in early 2024 based on estimated new room, but contributions are reported when they are made even if you choose to claim the deduction in a later year.

Putting a large amount into your RRSP — what to consider

Contributing a very large sum in one tax year can be tempting because of the immediate tax deduction, but it may not always be the most tax‑efficient choice. For instance, if your taxable income is $75,000 and you deduct $55,000 in one year, your taxable income could fall to $20,000, yielding a substantial tax refund. However, the marginal tax saving from the last portion of that deduction could be relatively low — perhaps around 20% depending on your province — while deferring part of the deduction to a year when your income is higher could save 30% or more. Spreading deductions across years can produce a higher overall tax benefit and effectively act like an after‑tax return on those contributions.

High‑income earners may prefer to claim the entire deduction in one year, but lower‑income contributors should be cautious. Contributing to an RRSP solely to reduce tax in a low‑income year can backfire if withdrawals during retirement are taxed at higher rates or if other benefits and credits are impacted. In some cases, low‑income taxpayers are better off prioritizing other savings vehicles or delaying RRSP contributions.

When a TFSA may be better than an RRSP

A Tax‑Free Savings Account (TFSA) can be a superior choice for savers in low tax brackets. TFSA contributions do not provide an immediate tax deduction, but investment growth and withdrawals are completely tax‑free. That makes TFSAs especially attractive for shorter-term goals, for people who expect to be in a similar or higher tax bracket in retirement, or for anyone who values flexible, tax‑free withdrawals.

Avoid overcontributing

Be careful not to exceed your RRSP contribution room. The CRA allows a $2,000 lifetime overcontribution buffer without penalty. Any contributions above that buffer are subject to a penalty tax of 1% per month on the excess. Because of this rule, it’s important to confirm your contribution limit before making large or early deposits and to read your NOA closely. On the NOA, the RRSP deduction limit indicates how much you can deduct, but unused RRSP contributions are amounts you previously contributed but did not deduct. For example, if your deduction limit is $20,000 and you have $5,000 of unused contributions from prior years, your actual available room for new contributions is $15,000.

What you can hold in an RRSP

• Cash: Includes cash and money‑market funds. Government‑issued currency and traditional cash equivalents are allowed; cryptocurrency is not eligible for RRSPs.
• Guaranteed Investment Certificates (GICs): GICs pay a fixed interest rate for a set term. Longer terms tend to offer higher rates.
• Mutual funds: Pooled funds that hold diversified baskets of stocks, bonds or other assets. They can be actively or passively managed.
• Exchange‑traded funds (ETFs): ETFs mimic indices or strategies and trade on exchanges, offering cost‑effective diversification.
• Bonds: Debt securities issued by governments or corporations, available as individual bonds, bond funds or bond ETFs.
• Stocks: Eligible equities are those that trade on recognized exchanges such as the Toronto Stock Exchange or the New York Stock Exchange.

In summary: first confirm your actual available RRSP contribution room by checking your NOA or CRA My Account. Next, decide whether contributing to an RRSP is the best move for your tax situation or if a TFSA or other investments suit your goals better. If you plan a large contribution, weigh the tax benefits of deducting it all in one year versus spreading deductions over multiple years to maximize tax savings and avoid overcontribution penalties.

Read more about GICs as a good investment:

• “Help! My RRSPs are all over the place”
• The benefits and flexibility of family RESPs
• How to ladder your GICs in Canada
• Is now the time for retirees to sell stocks and buy GICs?