Canadian federal income tax runs from 15% to 33%, with each province adding its own schedule on top. Combined marginal rates in the higher brackets exceed fifty percent in several provinces, which makes the choice of tax shelter more consequential than in most countries.
Two accounts dominate, and they work in opposite directions.
The two mechanics
- Registered Retirement Savings Plan. Contributions are deductible from income, growth is untaxed inside the plan, and withdrawals are fully taxable as income. Relief now, tax later.
- Tax-Free Savings Account. Contributions come from after-tax income, growth is untaxed, and withdrawals are entirely free of tax. No relief now, nothing later.
- Contribution room accrues annually for both. RRSP room is a percentage of earned income up to an annual maximum, reduced by any pension adjustment from a workplace plan. TFSA room is a flat annual amount for every adult resident regardless of income.
- Unused room carries forward indefinitely in both cases, which is why so many Canadians have large accumulated room and no immediate way to use it.
The decision rule
The arithmetic is simple even if the psychology is not. An RRSP wins when your marginal rate at contribution is higher than your marginal rate at withdrawal. A TFSA wins when the reverse is true. At equal rates the two are mathematically identical.
That last row is the most underused feature in the Canadian system. Contributing to an RRSP and claiming the deduction are separate acts. You can contribute this year and carry the deduction forward to a year when your income is higher, which is particularly useful for anyone expecting a promotion, a bonus or a return to work.
The payroll route nobody sets up
An RRSP contribution made personally gives relief through the annual return, meaning the money sits with the Canada Revenue Agency for up to sixteen months before coming back as a refund.
A group RRSP contribution made through payroll deduction gives the relief immediately, because the employer reduces the income on which tax is withheld. The same contribution costs less per pay period and requires no refund at all.
Where an employer does not offer a group plan, the same effect is available by applying to the CRA for a reduction of tax at source using form T1213, which authorises the employer to withhold less on account of planned contributions. It takes one form a year and almost nobody files it.
The employer match is the part not to miss
Many Canadian employers match a percentage of salary into a group RRSP or a defined contribution pension. Not contributing enough to capture the full match is the single most expensive common mistake in Canadian workplace finance, and it is entirely avoidable.
A match is an immediate return on the contributed amount before any investment growth. No comparison between RRSP and TFSA is close enough to justify forgoing it.
What comes off the payslip regardless
Alongside income tax, Canadian payroll deducts Canada Pension Plan contributions at 5.95% on earnings between the basic exemption and the annual ceiling, plus the second tier above it, and Employment Insurance premiums up to a separate ceiling. These are compulsory and reduce the cash available for either account.
Quebec runs its own versions of both, at different rates, which is one of several reasons a Quebec payslip looks different. That is covered in why a Quebec payslip looks nothing like an Ontario one, and the provincial tax spread in the provincial comparison.
The value of an RRSP contribution is your combined federal and provincial marginal rate, so start by finding that rate. Use the Canada Salary Calculator.