T4 Box 52 — Pension adjustment (PA)
The amount the CRA uses to reduce next year's RRSP contribution room when you belong to an employer pension plan.
At a glance — Box 52
- Box name
- Pension adjustment (PA)
- T1 line
- Line 20600 — Pension adjustment
- Check against
- The RRSP deduction limit statement in your CRA account for the following year, and your pension plan's annual statement.
What Box 52 means
Box 52 is your pension adjustment: the CRA's measure of the value of the retirement benefits you earned during the year under an employer's registered pension plan or deferred profit sharing plan. It is not money you received and not an amount you paid.
The point of the pension adjustment is fairness between people who save through a pension and people who save through an RRSP. Your RRSP deduction limit for the following year is calculated from your earned income and then reduced by this year's pension adjustment, so that a generous pension does not sit on top of full RRSP room.
In a defined benefit plan the pension adjustment is a formula estimate of the pension credit you accrued, not the contributions anyone made. In a defined contribution plan or a DPSP it is the total of employer and employee contributions for the year. The same salary can therefore produce very different pension adjustments in different plans.
Where an amount is reported in box 52, the employer must also enter the plan's seven-digit registration number in box 50. If you belong to more than one plan they enter the number of the plan giving the largest pension adjustment, and box 52 reports the combined pension credits from all of them.
Tax return implications
- The box 52 amount is entered on your return at line 20600. It does not reduce your income or your tax; it is reported so the CRA can compute next year's RRSP deduction limit.
- Your RRSP deduction limit after the pension adjustment appears on your notice of assessment and in your CRA account. Do not try to reconstruct it yourself.
- A pension adjustment reduces room for the following year, not the current one, so the effect of joining a pension plan shows up a year later.
- Buying back past service can generate a past service pension adjustment, which reduces RRSP room again and generally has to be certified by the CRA before the buyback proceeds.
- Leaving a plan before you are entitled to the full benefit can generate a pension adjustment reversal, which restores RRSP room that earlier pension adjustments took away.
Common pitfalls & things to check
- A pension adjustment is not a contribution and is not deductible. Entering it at line 20700 alongside box 20 is a common and easily caught error.
- If you are in a pension plan, do not contribute to your RRSP up to last year's limit from memory. Check the current limit in your CRA account first, because the pension adjustment may have cut it sharply.
- Employers do not report a pension adjustment where the calculated amount is nil or negative, where the employee died during the year, or where the employee stopped accruing new pension credits. A blank box 52 on a slip that has box 20 filled in is not automatically an error.
- Box 52 is reported in dollars only, with no cents, so a small difference against your plan statement is rounding rather than a mistake.
FAQ
Do I pay tax on the box 52 amount?
No. It is neither income nor a deduction. It is reported at line 20600 purely so the CRA can work out how much RRSP room you get for the following year.
My RRSP room barely moved this year. Why?
That is the pension adjustment doing its job. Your earned income created room and the box 52 amount took most of it back, which is the intended outcome for members of a good pension plan.
What is a past service pension adjustment?
It arises when benefits are improved or service is bought back for years already past. It reduces RRSP room in respect of those earlier years and generally needs CRA certification before the plan can proceed.
I left my employer. Do I get the room back?
Possibly. A pension adjustment reversal restores RRSP room where the benefit you actually take out of the plan is worth less than the pension adjustments already reported. The plan administrator reports it and the CRA adjusts your limit.
Related T4 boxes
Box 20 — Registered Pension Plan (RPP) contributions
Contributions you made to a registered pension plan through payroll deduction — fully deductible against employment income.
Box 14 — Employment income
Your total gross employment income for the year before any deductions — salary, wages, bonuses, commissions, taxable benefits and most other pay.
Box 16 — Employee's CPP contributions
The total CPP (Canada Pension Plan) contributions deducted from your pay during the year — base plus enhancement rate applied to pensionable earnings between the basic exemption and the YMPE.
Box 16A — Employee's second CPP contributions (CPP2)
CPP2 contributions on pensionable earnings between the YMPE and the YAMPE — introduced in 2024 for higher earners, at a flat rate specified in the CRA CPP enhancement schedule.
Filing your return? Use the payroll deductions calculator to verify the amounts on your T4 match expected CPP, EI and income tax withholdings, and the income tax calculator to estimate your refund or balance owing.
Sources
T4 box definitions from CRA T4 employer guide. Rates and thresholds current for 2025; file your 2025 T1 by April 30, 2026 (self-employed June 15).
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