Pension adjustment (PA)

Why the adjustment exists

Canada’s system of tax-assisted retirement saving is built on an overall limit of 18% of earned income, up to a dollar maximum. That limit covers registered pension plans, deferred profit sharing plans and RRSPs together. The PA reduces your RRSP room so that someone in a workplace pension plan does not get the same extra room as someone without one at the same income.

The PA is the total of your pension credits for the year from plans your employer takes part in. It never includes your own RRSP contributions, and it can be zero but never negative.

Where you see it and what it changes

Your employer reports the PA in box 52 of your T4 slip, and the box is blank if the PA is zero. The CRA then uses it when it works out your RRSP deduction limit for the next year, which appears on your notice of assessment. Because the adjustment reduces next year’s room, it does not affect your tax for the year on the slip, though it can change your refund or balance later by limiting deductions.

A past service pension adjustment arises when a defined benefit plan improves benefits for earlier years, and it also reduces room. A pension adjustment reversal does the opposite, restoring RRSP room when a plan member quits the plan.

An illustrative example

Suppose someone earned $100,000 in 2025 and belongs to a workplace pension plan, and their T4 for 2025 shows $9,000 in box 52. Eighteen per cent of $100,000 is $18,000 of new room for 2026, but the $9,000 adjustment is subtracted, leaving $9,000 before any unused room carried forward is added. The numbers are illustrative only. A real plan’s PA depends on the plan’s formula, and a defined benefit plan’s PA is not simply what you contribute.

A common mistake is to calculate room from last year’s earnings alone and overlook the PA, which can lead to an RRSP over-contribution. Excess amounts above the allowed cushion can attract a monthly tax, so check the room on your notice of assessment before contributing.

What to discuss with your accountant

Bring your latest notice of assessment, your T4 slips, your plan statements and any notice about a past service pension adjustment or reversal. Ask whether the room shown by the CRA still matches your records, how a job change or plan improvement affects it, and how an RRSP or TFSA should fit alongside a workplace pension. Use the figure on your notice rather than estimating it yourself.