The Pension Adjustment: A 2% Plan Leaves $600 of New Room
The pension adjustment is what turns a defined benefit member’s 18% RRSP entitlement into a much smaller number, and it does it in one line of arithmetic: 18% of earned income, less nine times the pension accrued that year, plus a $600 offset. At a 2% accrual rate the first two terms cancel and the $600 is the whole of it, at every salary the accrual cap allows. At 1.50% the answer is $5,100.00 on $100,000 of earnings and $3,300.00 on $60,000, so for everyone except a 2% member both the accrual rate and the salary matter.
None of those figures is what a member may contribute. They are element B of the deduction limit, the new room arriving for a single year, and the statutory formula is A + B + R – C. A member who has not used earlier years’ room is carrying element A on top of it, so the figure to contribute against is the deduction limit CRA computes for them, never element B on its own.
New room is what 18% leaves after nine times the accrual rate
A defined benefit pension adjustment (PA) is nine times the pension the member earned that year, less a fixed $600 offset, under ITR s.8301(6)(a) and the definition of “PA offset” in s.8300(1). Because RRSP room starts at 18% of earned income, what survives the subtraction is 18% less nine times the accrual rate, applied to that income, plus the $600. The coefficient on income is what decides the answer, and at a 2% accrual it is exactly zero.
| Accrual rate | $60,000 | $80,000 | $100,000 | $150,000 |
|---|---|---|---|---|
| 1.00% | $6,000.00 | $7,800.00 | $9,600.00 | $14,100.00 |
| 1.25% | $4,650.00 | $6,000.00 | $7,350.00 | $10,725.00 |
| 1.50% | $3,300.00 | $4,200.00 | $5,100.00 | $7,350.00 |
| 1.75% | $1,950.00 | $2,400.00 | $2,850.00 | $3,975.00 |
| 2.00% | $600.00 | $600.00 | $600.00 | $600.00 |
New room for 2026 against 2025 earnings, our arithmetic on the statutory formula. The 2% row is flat across the whole grid because its coefficient is zero. Every other row scales with pay, so a member needs both numbers to find their own, and the accrual rate is in the plan text rather than in any rule of thumb.
At a 2% accrual, salary does not change the answer
| Earned income | Benefit entitlement | Pension adjustment | 18% of income | New room |
|---|---|---|---|---|
| $70,000 | $1,400.00 | $12,000.00 | $12,600.00 | $600.00 |
| $100,000 | $2,000.00 | $17,400.00 | $18,000.00 | $600.00 |
| $150,000 | $3,000.00 | $26,400.00 | $27,000.00 | $600.00 |
| $187,000 | $3,740.00 | $33,060.00 | $33,660.00 | $600.00 |
The PA column is for 2025; new room is what that PA buys toward a 2026 RRSP deduction limit. At a fixed 2% accrual, nine times 2% is 18%, the same 18% that sets the ceiling, so the two cancel at every salary in the table and only the $600 offset is left.
The Income Tax Act builds the limit from two pieces, not one
The RRSP deduction limit is defined in section 146(1) of the Income Tax Act as A + B + R – C: A is unused room from the prior year; B is new room, the lesser of the RRSP dollar limit and 18% of the taxpayer’s earned income for the preceding year, minus the pension adjustment and any prescribed amount for that year; R is a pension adjustment reversal; C is a net past service pension adjustment.
Two details matter. B is phrased as “the amount, if any, by which” income exceeds the PA, which floors B at zero: a large PA stops new room but cannot claw back room already held. The formula also compares this year’s RRSP dollar limit against last year’s earned income and subtracts last year’s PA, a one-year lag written into the statute that makes the cancellation above exact rather than approximate.
The $600 offset lives in the pension regulations, not the Act itself
Section 146(1) tells you the PA gets subtracted, not how it is built; that is Income Tax Regulations territory. Under ITR section 8301, which governs the ordinary single-employer case (subject to other subsections and excluding a specified multi-employer plan), the DB pension credit is A minus B, where A is nine times the member’s benefit entitlement for the year and B is, for a member in one plan, simply the PA offset: $1,000 before 1997 and $600 for every year since. B is defined as the amount by which that offset exceeds the offsets already counted for the year, and s.8301(6)(a) limits that to three cases: another defined benefit provision with the same employer, an employer that does not deal at arm’s length with it, and another employer under the same plan. A member with two unrelated employers and two separate plans is outside all three.
Benefit entitlement is defined at ITR s.8302(1) as the portion of the member’s accrued benefit attributable to employment with that employer. Section 8302(2)(a) builds it from the portion of the normalized pension that “can reasonably be considered to have accrued in respect of the year”, subject to further subsections there. That wording is why a reported figure can disagree with the arithmetic: the accrual is the one the plan’s own terms produce for the year, not a flat percentage of a full year’s pay. For a plan accruing a flat 2% of salary, that portion is simply 2% of the year’s earned income.
Put the two together: a DB pension credit is nine times the benefit entitlement, less $600. At 2% accrual, entitlement is 0.02 times salary, so the PA is 0.18 times salary, less $600, which is exactly 18% of income less the same $600 that section 146(1) was always going to subtract.
Above $187,833 of salary, the same answer holds for a better reason
Eighteen percent of earned income catches up to the 2026 RRSP dollar limit of $33,810 at earned income of $187,833.33. Below that line the cancellation works because the PA tracks 18% of salary exactly. Above it the DB accrual itself is capped, which is why the $600 answer holds anyway.
CRA’s DB limit caps benefit entitlement at $3,756.67 for 2025, one ninth of the money purchase limit. Because section 146(1) sets the RRSP dollar limit for a year at the prior year’s money purchase limit, the two cancel at the top end too: nine times one ninth of the money purchase limit, less $600, equals next year’s RRSP dollar limit less $600, so the offset is again the only thing left.
On the money purchase limit itself the PA is $33,210.00 and new room is $600.00. On CRA’s published, cents-rounded DB limit the PA is $33,210.03 and new room is $599.97, the three cents coming from CRA rounding $33,810 divided by nine, $3,756.6666 repeating, to $3,756.67. That is not a second, different answer: it is the same $600 result, read off a figure that was already rounded before it reached the table.
Defined contribution members play by a different rule entirely
A money purchase, or defined contribution, pension credit has no nine and no offset. ITR s.8301(4) sets it at the contributions actually made in the year, by the member and by the employer, plus allocated forfeitures and surplus. Whatever goes into the plan is the pension adjustment, dollar for dollar.
| Earned income | Contributions | Pension adjustment | New room |
|---|---|---|---|
| $60,000 | 5% + 5% | $6,000.00 | $4,800.00 |
| $100,000 | 5% + 5% | $10,000.00 | $8,000.00 |
| $100,000 | 9% + 9% | $18,000.00 | $0.00 |
PA is for 2025 and new room for 2026, as above; the pension credit here is the one in ITR s.8301(4), the contributions themselves.
The 9% plus 9% row is the design working as intended: 18% in equals 18% out, nothing left over. A DC member sees the calculation directly, because the PA is just the contributions; room runs out only once the combined rate reaches 18%.
A pension adjustment past the Act’s ceiling makes the plan revocable
Except as otherwise provided by regulation, a registered pension plan other than a multi-employer plan becomes revocable if a member’s PA for the year exceeds the lesser of the money purchase limit and 18% of the member’s compensation from the employer, per section 147.1(8) of the Income Tax Act. The consequence falls on the plan’s registration rather than on the member.
For 2026 the money purchase limit is $35,390. The largest 2026 DB accrual CRA publishes is $3,932.22, which produces nine times $3,932.22, or $35,389.98, less the $600 offset: a pension adjustment of $34,789.98, just under the ceiling by design.
Section 146(1) measures its 18% ceiling against earned income; section 147.1(8) measures its own 18% ceiling against compensation from the employer, a separately defined term. Treating a single salary figure as both, as the worked examples above do, is the right simplification for an ordinary salaried employee with one employer and no other earned income, but it is a simplification.
What the T4 figure is, and what it is not
CRA’s guidance on line 20600 is direct: enter the amount shown in box 52 of your T4 slip, or box 034 of your T4A slip, and that figure generally reduces your RRSP deduction limit for the following year. CRA’s registered plans limits table puts the 2026 money purchase limit, DB limit and RRSP dollar limit at $35,390, $3,932.22 and $33,810, with the 2027 RRSP dollar limit already set at $35,390.
The room those limits and that PA produce is element B alone. Element A is the unused room carried from every prior year the member did not fully use. A 2% DB member who has never contributed has been banking $600 a year since joining the plan, so their deduction limit after a decade of service is nowhere near $600. The excess scenario below assumes element A is zero, which holds only for a member who has used every dollar of room every year. A notice of assessment carries at least three different figures, and which of them is the one to contribute against is set out in our guide to RRSP rules.
Contributing on the 18% figure instead of $600 runs into the over-contribution tax
The gap between 18% of income and $600 of real room is exactly where a DB member gets into trouble without checking their own unused room. Take the same 2% member on $100,000 who contributes $18,000 believing 18% is the limit, with no unused room. New room is $600.00, so the contribution is $17,400.00 over room. A $2,000 cushion comes off next, available under ITA s.204.2(1.1) to anyone who attained 18 in a preceding taxation year: it is element C of the cumulative excess amount there, a different C from the net past service pension adjustment in section 146(1). That leaves a taxable cumulative excess of $15,400.00. The 1% a month tax under ITA s.204.1(2.1) comes to $154.00 at each month-end, $462.00 over three of them and $1,848.00 over twelve.
That tax, the cushion and the filing deadline it runs on are the subject of our piece on the 1% a month tax on an RRSP over-contribution.
Two more adjustments move room, one each way
Two further adjustments appear as letters in the same section 146(1) formula, and they pull in opposite directions: one is subtracted like the annual PA, the other is added back.
A past service pension adjustment reduces room: the net figure is element C, which is subtracted. It follows a past service event, of which a buyback of service is one, and the Minister will not certify the provisional amount, on the administrator’s application, unless the member has the room under ITR section 8307(2)(b)’s $8,000-plus-room test. A $30,000 PSPA against $5,000 of room needs a $17,000 qualifying withdrawal; a $12,000 PSPA against the same $5,000 certifies with nothing withdrawn.
A pension adjustment reversal, element R, runs the other way, but only where ITR s.8304.1(14)’s conditions hold: termination after 1996 and otherwise than because of death, with no retirement benefits yet paid under the provision; otherwise the PAR is nil. Where met, a member leaving a defined benefit plan with less than their accumulated credits gets that difference back as new room, computed under ITR section 8304.1(5)(a). Because R is added back rather than subtracted in the section 146(1) formula, a qualifying PAR arrives as new room, not a second reduction.
What the $600 is actually worth
None of this is a case against the pension. The factor of nine in ITR s.8301(6)(a) is the Regulations’ own conversion between a dollar of annual pension and the registered saving it displaces, and a member accruing at a given rate is getting that pension in exchange. The honest point is narrower than a grievance: the number to plan around is the deduction limit on the notice of assessment, which adds element A to element B and then settles R and C, not the 18%-of-income figure that applied before the PA was subtracted.
The DB-versus-DC contrast in the tables above is where that lands in practice. A 2% DB member’s new room is $600 a year across the whole salary range above, while someone contributing a modest rate to a money purchase plan still has most of the 18% available, so the two are not making the same decision about where the next dollar of saving goes. For the DB member it turns entirely on element A: a balance of unused room from earlier years is RRSP capacity they already hold, and only once that is spent does the question become which other account takes the money. Our guide to the TFSA, RRSP and FHSA is where that comparison is worked through.
Figures in this piece come from the Income Tax Act and Income Tax Regulations as published on Justice Laws, current to September 21, 2026 and last amended June 18, 2026; from CRA’s registered plans limits table and its line 20600 guidance, both retrieved October 6, 2026; and from our own arithmetic applying those statutory formulas and published limits at the accrual rates, salaries and scenarios shown.
Disclaimer: The content on bestcanadianstocks.ca is for informational and entertainment purposes only and does not constitute financial advice. Past performance is not indicative of future results. Always consult a qualified financial advisor before making investment decisions. Statutory references are to the Income Tax Act and the Income Tax Regulations as consolidated at the Justice Laws website, texts stating they are current to September 21, 2026 and last amended on June 18, 2026. The money purchase, defined benefit and RRSP dollar limits, and the line 20600 guidance on box 52, are the Canada Revenue Agency’s published figures, retrieved October 6, 2026. The pension adjustments and the resulting room at each salary, accrual rate and contribution rate are our own arithmetic applying the statutory formulas to those limits, at the figures named beside each.
