Bonus Tax Calculator

How the Canadian Bonus Method Works

When your employer pays you a bonus, retroactive pay increase, or other irregular lump-sum amount, the CRA prescribes a specific calculation called the bonus method to determine how much tax to withhold. The goal is to approximate your marginal tax rate so that the withholding is reasonably close to the actual tax you will owe on the bonus when you file your annual return. The bonus method takes your annual salary plus the bonus, calculates the income tax on that combined amount using the standard payroll tables, then subtracts the tax on your annual salary alone — the difference is what your employer withholds from the bonus.

Bonuses often feel like they are taxed harder than regular pay, but that is largely a perception issue. Your bonus is added to your overall taxable income for the year and taxed at the same federal and provincial rates as everything else. What changes is just the withholding methodology — because the bonus is paid as a single chunk, the bonus method ends up applying your marginal rate (the rate on your last dollar of income) to most of the bonus, whereas regular paycheques have lower deductions because they include basic personal credits prorated across each pay period.

Bonus Method Example — $5,000 Bonus in Ontario (2026)

If you receive a substantial bonus and worry about losing too much to tax, the most effective way to reduce withholding is to contribute the bonus directly to your RRSP. Most employers allow you to deposit some or all of a bonus into a group RRSP or your personal RRSP through payroll — when this happens, the employer reduces the income tax withheld from the bonus by the same amount, so the entire bonus goes to work for you. Alternatively, you can complete CRA Form T1213 (Request to Reduce Tax Deductions at Source) ahead of time if you make personal RRSP contributions and want your employer to factor those deductions into payroll withholding.

Note that CPP and EI deductions are also taken from bonuses up to the annual maximums. The 2026 CPP first earnings ceiling is $74,600 with a contribution rate of 5.95%; CPP2 adds another 4% on earnings between $74,600 and $85,000. EI premiums of 1.63% apply to insurable earnings up to $68,900. If you have already hit any of these annual maximums earlier in the year — common for higher earners — those deductions will not be taken from your bonus, which makes year-end bonuses noticeably larger than mid-year ones for the same gross amount. Quebec residents also have QPIP (0.494%) deducted instead of part of EI.