Halfway down page 2 of your CRA Notice of Assessment is a box titled "Your 2026 RRSP deduction limit statement." This is the most important number on the document — it determines how much you can shelter from tax in the next 12 months. Here's how the math works and how to use the number well.

The four numbers in the statement

The CRA's RRSP deduction limit statement always shows the same four lines, in the same order:

1. Unused RRSP deduction room from prior years — what you accumulated and didn't use
2. Plus 2025 RRSP deduction limit earned — 18% of 2025 earned income, capped at $32,490 for 2026
3. Minus 2025 pension adjustment (PA) — what your employer pension counts as
4. Plus 2025 PA reversal, if any — credit if you left a pension plan

The bottom of the box is your 2026 RRSP deduction limit. That's the number you can claim as a deduction on your 2026 return.

What "earned income" actually counts

CRA's definition of earned income for RRSP purposes is narrower than total income. It includes:

• Employment income (T4 box 14)
• Net self-employment income
• Net rental income
• Royalty income from work you authored
• Disability pension under CPP
• Spousal/child support received that's taxable

It excludes: investment income, capital gains, OAS, CPP retirement (vs disability), and most pension income. A retiree with $80,000 of investment income generates zero new RRSP room.

The pension adjustment trap

If you have a defined-benefit pension at work, your T4 will show a Pension Adjustment in box 52. The PA is CRA's estimate of how much your employer pension is "worth" that year — and it directly subtracts from your RRSP room.

For most full-time public-sector employees, the PA equals roughly 18% of pensionable earnings — exactly the same as the RRSP top-up percentage. Net result: a teacher or nurse with a full pension generates almost no new RRSP room. The pension is doing the sheltering instead.

Contribution vs deduction — the $2,000 cushion

These two terms are often used interchangeably but mean different things to CRA:

• Deduction limit — the maximum you can deduct on your tax return
• Contribution limit — deduction limit + $2,000 lifetime over-contribution buffer

You can contribute up to $2,000 over your deduction limit without penalty. You cannot deduct the extra $2,000, but you can carry it forward and deduct it in a later year when you have room. The buffer is a one-time lifetime cushion, not an annual reset.

Going over the $2,000 buffer triggers a 1% per month penalty tax (form T1-OVP) until you withdraw the excess. Most over-contribution penalties happen because someone trusted CRA My Account's room number when it hadn't yet caught up to a December contribution.

How to use the limit well

1. Don't always max it. RRSPs are tax-deferred, not tax-free. If your marginal rate today is lower than your expected rate in retirement (e.g., a young earner under $57K), use the FHSA or TFSA first.
2. Time the deduction. You can contribute now and deduct in any future year. If you expect a big income jump (raise, bonus, switch from contractor to employee), contribute now but save the deduction for the higher-tax year.
3. Use the spousal RRSP. Splits future retirement income between spouses — the contribution counts against your room but the eventual withdrawals are taxed in the lower-income spouse's hands.
4. Convert to FHSA / TFSA where it fits. See our FHSA vs RRSP vs TFSA guide.

Run the numbers for your situation: RRSP calculator, FHSA room calculator, TFSA calculator.

What if my NOA's number is wrong?

It's rare, but it happens — usually because of a missed pension adjustment or a T4 amendment that didn't flow through. Two checks before you assume CRA is wrong:

• Pull the prior year's NOA and trace forward: prior year's room minus what you actually deducted in 2025 plus 18% of 2025 earned income (capped at $32,490) minus your 2025 PA. The math should match within $50.
• Check CRA My Account → RRSP and TFSA → RRSP. If My Account agrees with the NOA but disagrees with your manual math, the issue is on your side (most likely a forgotten contribution).

If both numbers are wrong, file a T1 adjustment for the year that introduced the error. Walk-through in our NOA dispute guide.

Bottom line

Your NOA's RRSP deduction limit is the most important annual number on the document. Read all four lines (carryforward, new room, PA, PA reversal), compare to your own running total, and don't trust CRA My Account in November and December — it lags. Keep $2,000 of cushion in reserve for last-minute contributions, and don't max the RRSP if your marginal rate today is lower than your projected rate in retirement.

Related: NOA line-by-line guide, why CRA's TFSA number is wrong half the time.

Sources: CRA — RRSP deduction limit, CRA — RRSP and pension limits.