Key Takeaways
- Each year you earn new RRSP room equal to 18% of your previous year's earned income, up to a dollar cap — $32,490 for 2025 and $33,810 for 2026 — minus any pension adjustment.
- Unused RRSP room never expires: it carries forward year after year until December 31 of the year you turn 71, and your Notice of Assessment prints your exact deduction limit.
- There is a $2,000 lifetime over-contribution cushion; beyond it, the CRA taxes the excess at 1% per month, reported on Form T1-OVP within 90 days after the end of the year.
Your RRSP room is 18% of what you earned — with a ceiling
Unlike a TFSA, which hands everyone in Canada the same annual amount, your RRSP room is personal. Every year, the CRA calculates it for you using a formula that has barely changed in decades:
New room = 18% of your previous year's earned income, up to the annual dollar maximum — minus your pension adjustment.
The dollar maximum is the ceiling that keeps high earners from sheltering unlimited income. It was $31,560 for 2024, $32,490 for 2025, and $33,810 for 2026 (the CRA has already published $35,390 for 2027). At the 2026 cap, the ceiling only starts to bite once earned income passes roughly $187,833 — below that, the 18% is the number that matters.
The pension adjustment (PA) is the quiet subtraction. If your employer runs a pension plan or a group RRSP factored into the calculation, the value of the pension you earned shows up in box 52 of your T4 (or box 034 of a T4A) and reduces your new RRSP room dollar for dollar. Two people with identical salaries can end the year with very different room.
What counts as "earned income" — and what doesn't
The 18% is calculated on earned income, a defined term that is narrower than most people assume. From the CRA's own calculation chart, earned income includes:
- Employment income (after related expenses such as union dues)
- Net business income from self-employment
- Net rental income
- Royalties from a work or invention you created
- Net research grants, and CPP/QPP disability benefits
- Taxable support payments you received
Just as important is what is missing from the list: investment income, capital gains, pension income and EI benefits do not create RRSP room. A year in which you lived off your portfolio adds no new room at all — one reason advisors push salaried Canadians to bank room while they are earning it.
A worked example
Say you earned a salary of $80,000 in 2025, have no employer pension, and have never contributed to an RRSP. Your new room for 2026 is 18% × $80,000 = $14,400. The $33,810 cap never comes into play. That $14,400 joins whatever unused room you carried into the year — and unused room never expires. It rolls forward indefinitely, which is why a 45-year-old who ignored their RRSP for two decades can find a six-figure deduction limit waiting on their Notice of Assessment.
That Notice of Assessment — specifically its "RRSP deduction limit and available contribution room statement" — is the official source, also available on Form T1028 or in CRA My Account. It separates three numbers people constantly confuse: your deduction limit, any contributions you made but have not yet deducted, and your available contribution room.
Two features build on that bookkeeping. You may contribute now and claim the deduction in a later year — undeducted contributions carry forward on their own — which is the standard move when this year's income is taxed lightly and next year's will be taxed heavily. And room generation stops for good at the end of the year you turn 71: December 31 of that year is the last day you can contribute to your own RRSP, after which it converts to a RRIF or an annuity. (Contributions to a spousal RRSP can continue until the end of the year your spouse turns 71.) Room is only half the RRSP story, by the way — the RRSP Home Buyers' Plan lets first-time buyers borrow from it, and our RRSP vs TFSA comparison shows how the two accounts' tax treatment diverges in retirement.
Over-contributing: the $2,000 cushion and the 1% tax
The CRA definition of an RRSP excess builds in a deliberate safety margin: your contributions count as an excess only once they exceed your deduction limit plus $2,000. That $2,000 is a lifetime cushion, not an annual one, and amounts inside it earn no deduction until you gain room.
Beyond the cushion, the tax is 1% per month on the excess, reported and paid on Form T1-OVP (most individuals can use the simplified T1-OVP-S) within 90 days after the end of the year. The cleanest cure is the same as with a TFSA: withdraw the excess promptly, and keep the paperwork that proves when you did.
The Twikup Take
RRSP room is the one tax shelter in Canada that rewards patience twice — unused room waits for you, and undeducted contributions wait until they are worth the most. The only real way to lose is to guess at your number. It is printed on your Notice of Assessment every single year; read it before you contribute, not after the T1-OVP arrives.
Image: Illustrative image.