Your workplace pension eats into your RRSP room - here's how much

If you have a workplace pension, your RRSP contribution room shrinks. The CRA calls this a "pension adjustment" - and it's not optional math you can ignore.

Here's what happens: your employer contributes to your pension plan. The CRA figures that contribution is part of your retirement savings for the year. So they reduce your RRSP limit by roughly the same amount to keep things fair between people with pensions and people without.

The math isn't dollar-for-dollar simple, but it's close. Say your employer puts $3,000 into your defined benefit pension plan this year. Your pension adjustment will be around $3,000, which means $3,000 less RRSP room next year.

You'll see this number on your T4 in Box 52. It gets subtracted from the standard 18% of earned income when the CRA calculates your RRSP limit. So instead of having $14,400 in RRSP room on $80,000 of income, you might have $11,400 after a $3,000 pension adjustment.

The catch with defined benefit plans

Defined benefit pensions - the kind that promise you a specific monthly payment in retirement - create the biggest pension adjustments. That's because the CRA values the future pension promise at about nine times the annual benefit you're earning.

If your pension plan says you'll get an extra $100 per month in retirement based on this year's service, the CRA treats that like a $10,800 contribution ($100 × 12 months × 9). Your pension adjustment could be $10,800 even if your actual payroll deduction was much smaller.

This is why teachers, government workers, and other employees with strong defined benefit plans often have little to no RRSP room. The pension plan is doing the heavy lifting for their retirement savings, so the tax system doesn't give them much additional tax-deferred space.

What this means for your decisions

You can't opt out of the pension adjustment. If you have a workplace pension, you have a workplace pension. The RRSP room reduction happens automatically.

But you can still make choices about any remaining room. TaxSplit.ca will show you exactly how much RRSP space you have left after your pension adjustment, based on your specific income and pension details.

Some people with pensions focus their remaining RRSP room on spousal contributions if their partner has more room. Others max out their TFSA instead, since pension adjustments don't affect TFSA contribution limits.

The key thing: don't assume you have the full 18% of income available for RRSP contributions if you have a workplace pension. Check your Notice of Assessment or your CRA online account to see your actual room after the pension adjustment. That's the number that matters for your contributions this year.