How is the RRSP contribution limit calculated?

Your deduction limit for a year is 18% of the previous year's earned income, capped at that year's dollar limit — $33,810 for 2026 and $32,490 for 2025 — minus your pension adjustment if you have a workplace pension, plus any unused room carried forward from earlier years. Unused room carries forward indefinitely, so the carry-forward is often much larger than the current year's entitlement.

What counts as earned income for RRSP purposes?

Employment income, net self-employment income, net rental income, disability pensions from CPP or QPP, royalties, and taxable support payments received, less certain employment expenses and any business or rental losses. Investment income does not count: interest, dividends and capital gains generate no RRSP room, which is why someone living on investments alone builds no new room.

What is the RRSP deadline?

Contributions made in the first 60 days of the following year can be deducted against the prior tax year. The CRA gave March 2, 2026 as the deadline for the 2025 tax year. That grace period is unique among registered accounts — the RESP cuts off hard on December 31 — and it means you can often see your actual tax position before deciding how much to contribute.

What happens if I over-contribute to my RRSP?

You are allowed a $2,000 lifetime cushion above your deduction limit with no penalty, though that amount is not deductible. Beyond the cushion, the CRA charges a tax of 1% per month on the excess until it is withdrawn or absorbed by new room. The TFSA has no equivalent cushion at all.

Can I still contribute after 71?

No — you cannot contribute to your own RRSP after the year you turn 71, and the plan must be converted to a RRIF or an annuity by the end of that year. You can still deduct previously unused contributions after 71, and if you have a younger spouse you can keep contributing to a spousal RRSP until the end of the year they turn 71.

RRSP Contribution Limit Calculator

Work out your deduction limit from earned income, pension adjustment and carry-forward — then see what a contribution is actually worth. Not just the refund: if you have children, an RRSP deduction also raises next year's Canada Child Benefit, which most calculators leave out entirely.

Contribution year

Previous year's earned income

Employment, self-employment and net rental income. Interest, dividends and capital gains don't count.

Pension adjustment

Box 52 of your T4, if you have a workplace pension. Zero if you don't.

Unused room carried forward

From your latest CRA Notice of Assessment.

What it's worth

Amount you plan to contribute

Your marginal tax rate

Children under 18

Your deduction limit $— —

18% of earned income$—

Capped at the annual limit$—

Less pension adjustment$—

Plus carry-forward$—

Room left after your contribution$—

A contribution of this size returns —

Tax refund$—

Extra Canada Child Benefit$—

Effective return on the contribution—

—

How the limit is built

deduction limit = 18% of last year's earned income
capped at the annual dollar limit
− pension adjustment
+ unused room carried forward

Year	Annual dollar limit	Earned income that reaches it
2026	$33,810	$187,833
2025	$32,490	$180,500

Two features do most of the work. The limit is based on the previous year's income, which is why a newcomer or a new graduate has no room in their first year — there was no prior-year Canadian earned income to take 18% of. And unused room carries forward indefinitely, so for most people the carry-forward on their Notice of Assessment dwarfs the current year's entitlement.

The pension adjustment is the piece people forget. If you belong to a workplace pension, box 52 of your T4 reports the value of the benefit you accrued, and it is subtracted from your room — because you have already been credited with retirement savings. Someone in a generous defined-benefit plan may have almost no RRSP room despite a high salary, which is correct rather than unfair.

What counts as earned income — and what doesn't

Counts	Does not count
Employment income	Interest
Net self-employment income	Dividends
Net rental income	Capital gains
CPP/QPP disability pensions	Retirement pension income
Royalties, taxable support received	RRSP/RRIF withdrawals

The dividing line is work versus capital. An investor living entirely on interest and dividends builds no new RRSP room at all, no matter how large the portfolio — the room comes from labour, not from wealth. Rental income is the notable exception on the "counts" side, and business or rental losses reduce earned income.

The deadline, the buffer, and the age limit

60 days into the following year

Contributions made in the first 60 days of the next calendar year can be deducted against the prior tax year — the CRA gave March 2, 2026 as the deadline for the 2025 tax year. This grace period is unusual and useful: unlike the RESP, which cuts off hard on December 31, you can often see your actual tax position for the year before deciding how much to put in.

The $2,000 cushion

You may exceed your deduction limit by $2,000 over your lifetime without penalty. The cushion is not deductible — it just isn't punished. Above it, the CRA charges 1% per month on the excess until you withdraw it or new room absorbs it. Note that the TFSA has no equivalent cushion, so the two accounts behave differently when you miscalculate.

Age 71

You cannot contribute to your own RRSP after the year you turn 71, and the plan must become a RRIF or an annuity by the end of that year. Two things still work afterwards: you can deduct previously undeducted contributions, and if your spouse is younger you can keep contributing to a spousal RRSP until the end of the year they turn 71. What happens next is in the RRIF withdrawal guide.

What a contribution is actually worth

Most calculators stop at the refund. That understates the value for anyone with children, because the Canada Child Benefit is tested on net income and an RRSP deduction lowers net income dollar for dollar.

Line		Amount
Contribution		$10,000
Tax refund	× 38%	$3,800
Extra CCB	two children, $70,000 family net income	$1,350
Total returned		$5,150
Effective return	$5,150 ÷ $10,000	51.5%

With three children in the same income band the CCB portion rises to 19%, and with four to 23%. This is the strongest argument for prioritising the RRSP that most families never hear. The full mechanism is in the CCB calculator, and whether the RRSP is the right account at all is in RRSP or TFSA?

One honest caveat the arithmetic hides: if you expect to receive the Guaranteed Income Supplement in retirement, RRSP withdrawals will later be clawed back at roughly 50 to 75 cents on the dollar, which can more than undo the gain. See the GIS guide before assuming the RRSP wins.

RRSP limit questions, answered

How is the limit calculated?

18% of the previous year's earned income, capped at the annual dollar limit ($33,810 for 2026, $32,490 for 2025), minus your pension adjustment, plus unused room carried forward indefinitely.

What is earned income?

Employment income, net self-employment income, net rental income, CPP/QPP disability pensions, royalties and taxable support received, less certain employment expenses and business or rental losses. Investment income does not count.

When is the deadline?

60 days into the following year — March 2, 2026 for the 2025 tax year. Contributions in that window can be deducted against either year, which is a genuine planning option.

What if I over-contribute?

A $2,000 lifetime cushion is allowed without penalty but is not deductible. Above that, 1% per month on the excess until it is withdrawn or absorbed.

Where do I find my real number?

Your Notice of Assessment and CRA My Account both show your deduction limit, and unlike the TFSA figure it is reliable, because the CRA calculates it from returns you have already filed. Do subtract anything you have contributed since the notice was issued.

Should I contribute now or carry the deduction forward?

You can contribute now and claim the deduction in a later year. If your income is about to rise into a higher bracket, contributing now and deducting later gives you tax-sheltered growth in the meantime and a bigger refund when you claim it.

What about a spousal RRSP?

You contribute, you get the deduction, and the funds belong to your spouse. It uses your room, not theirs. The point is to even out retirement incomes so the couple pays less tax overall — still useful despite pension income splitting, particularly before 65 when splitting is more limited.

Method and sources

The calculator applies 18% to the earned income you enter, caps it at the year's dollar limit, subtracts the pension adjustment, adds carry-forward, and floors the result at zero. The value of a contribution is estimated as contribution × marginal rate for the refund, plus the marginal Canada Child Benefit reduction rate at your family net income and number of children for the July 2026 – June 2027 benefit year. Both are estimates: the refund assumes the deduction does not drop you into a lower bracket, and the CCB increase applies to the benefit year beginning the July after you file.

Your actual limit is stated on your CRA Notice of Assessment and should be treated as authoritative — this tool is for planning before that number arrives, or for sanity-checking it.

Sources: CRA — MP, DB, RRSP, DPSP, ALDA, TFSA limits and the YMPE, CRA — Definitions for RRSPs, CRA Guide T4040.