Guide · Tax year 2026
How bonuses are taxed in Canada
A bonus is ordinary employment income. There is no bonus tax rate, no penalty rate and no separate schedule. What confuses people is that the amount withheld from a bonus is calculated differently from the amount withheld from salary, and withholding is not the same thing as tax.
Withholding is a forecast, not a bill
Your employer does not know what your year will look like when it pays you a bonus in March. The Canada Revenue Agency publishes a bonus method for this: notionally spread the bonus over the year, work out what the tax on the higher annual figure would be, and withhold the difference. It is a reasonable forecast and it is often too high, particularly if the bonus is large relative to your salary or arrives early in the year.
Whatever was withheld, the tax you owe is settled on your return. If too much came off the bonus, the excess comes back as a refund. If your circumstances mean too little came off, you pay the difference. The withheld amount on the pay statement is not the answer to the question of what the bonus cost you.
The honest calculation
The tax on a bonus is the tax on a year that includes it minus the tax on the same year without it. That is the only method that stays correct when the bonus straddles a bracket boundary, a surtax threshold or a contribution ceiling, and it is what the bonus calculator does: two complete years, then subtract.
Multiplying the bonus by a marginal rate is the shortcut, and the table below shows how far off it can be. The marginal rate is the slope at the salary you were already at. A $10,000 bonus moves you along the curve, and the curve is not straight.
| Base salary | Income tax | CPP and EI | Kept | Total bite | Shortcut estimate |
|---|---|---|---|---|---|
| $50,000 | $2,046.72 | $758.00 | $7,195.28 | 28.0% | $2,519.00 |
| $70,000 | $2,993.94 | $489.70 | $6,516.36 | 34.8% | $3,435.00 |
| $90,000 | $2,990.70 | $0.00 | $7,009.30 | 29.9% | $2,965.00 |
| $150,000 | $4,479.38 | $0.00 | $5,520.62 | 44.8% | $4,341.00 |
| $250,000 | $4,997.22 | $0.00 | $5,002.78 | 50.0% | $4,983.00 |
The last column is the bonus multiplied by the marginal deduction rate at the base salary, which is the shortcut most people reach for. Compare it with the sum of the second and third columns. On the $50,000 row the shortcut is out by $285.72, because the bonus carries that person across the first federal bracket threshold at $58,523 and the slope measured at $50,000 knows nothing about the rate on the other side. The shortcut is close where the bonus stays inside one bracket and drifts wherever it does not.
Crossing the pension ceiling
The clearest case is a bonus that carries you past the pension ceilings. Pension contributions stop entirely above $85,000 of earnings, and employment insurance stops above $68,900. A bonus paid on top of a salary that already clears those lines attracts no contribution at all.
- On a $70,000 base, a $10,000 bonus takes you from below the first pension ceiling of $74,600 to above it. The bonus attracts $489.70 of pension contributions: 5.95% on the part below the ceiling and 4% on the part above it. Total bite: 34.8%.
- On a $90,000 base, the same bonus attracts $0.00 in contributions, because both ceilings were already behind you. Total bite: 29.9%, on a higher salary.
The person earning more keeps a larger share of the same bonus. That is not a mistake in the arithmetic, and no marginal rate lookup can produce it, because the effect is not an income tax effect at all.
Things that are true and things that are not
- Not true: bonuses are taxed at a flat rate, often quoted as forty or fifty percent. That number is a withholding outcome, not a rate in any statute.
- Not true: a bonus can push you into a higher bracket and leave you worse off. Only the part above a threshold is taxed at the higher rate. There is no salary at which earning one more dollar leaves you with less.
- True: a bonus can raise your income past a phase-out and reduce something else. The federal basic personal amount shrinks between $181,440 and $258,482, and income-tested benefits calculated on your return work the same way. Those are real, and they are gradual rather than a cliff.
- True: the timing matters for cash flow but not for the final tax. A bonus paid in December and a bonus paid in January belong to different tax years, which changes which year the income lands in.
Reducing the tax on a bonus
The usual route is an RRSP contribution, which is a deduction against the income the bonus created. Some employers will pay a bonus directly into an RRSP and reduce the withholding accordingly, which avoids waiting for a refund; whether yours will is a question for your payroll department. What the deduction saves you depends on the rates it spans, and that is worked through in how RRSP contributions affect income tax. This site does not give tax advice and does not know your contribution room.
Related
Sources
- Current year tax rates and income brackets (2026) · Canada Revenue Agency · checked
- CPP contribution rates, maximums and exemptions, 2026 · Canada Revenue Agency · checked
- T4032 Payroll Deductions Tables, January 2026 · Canada Revenue Agency · checked
- Canada Employment Insurance Commission sets the 2026 Employment Insurance premium rate · Employment and Social Development Canada · checked
Reviewed 2026-08-18