Payday Reality Check
Bonus Tax Calculator
Your bonus is taxed at your highest marginal rate, not your average rate. See what actually lands in your account before you spend it.
Your details
Your bonus, after tax
Bonus in your pocket
From a $10,000 gross bonus.
Tax on bonus
34% effective rate on the bonus.
Year at a glance
| Salary only | Salary + bonus | Change |
|---|
Estimates assume a single resident taxpayer on standard settings and show your true annual liability, which can differ from payroll withholding on the day. Model pension contributions and more in the full salary calculator.
How It Works
Why bonuses feel over-taxed
Two things are going on: your bonus genuinely is taxed at your top marginal rate, and payroll systems often withhold even more than that on the day it's paid.
Withholding vs reality
Many payroll systems annualise a bonus — they treat it as if you earned that much extra every pay period — which inflates the withholding on that single payslip. The overpayment isn't lost: it's reconciled in your annual tax return. This calculator shows your true annual position.
Sacrificing a bonus
Because a bonus is taxed at your highest rate, it's also the most tax-effective money to redirect. Salary-sacrificing a bonus into super (AU), a 401(k) (US) or a pension (UK) can cut the tax on it from 30–47% down to 15% or zero, depending on the country and caps.
The bracket myth
A bonus can never leave you worse off overall. If it "pushes you into a higher bracket", only the slice of income above the threshold is taxed at the higher rate — everything below it keeps its lower rates. People confuse marginal and average rates all the time; our guide to marginal vs effective tax rates untangles it with worked numbers.
Bonus vs pay rise
A $10,000 bonus and a $10,000 raise are taxed almost identically in the year you receive them — but the raise repeats every year and compounds through future percentage increases, employer pension contributions and overtime rates. If you're ever offered a choice, run both through this page and the pay rise calculator before deciding.
A worked example: why the rate on your bonus looks so high
Imagine a simplified country with three tax bands: 0% on the first $20,000, 20% from $20,000 to $80,000, and 40% above $80,000. You earn a $90,000 salary, so your salary alone attracts $16,000 of tax — $0 + $12,000 + $4,000 across the three bands. That's an average rate of about 17.8%, which is what your regular payslips reflect.
Now a $10,000 bonus arrives. Every dollar of it lands on top of the $90,000 you already earn, deep inside the 40% band. Tax on the bonus: $4,000 — a 40% rate, more than double the average rate you're used to seeing. Nothing unfair happened; the bonus simply gets none of the tax-free and low-rate bands, because your salary already used them up. The same logic applies in reverse to deductions: money you shelter from tax comes off the top band first, which is exactly why redirecting bonus money into a pension or super fund is so effective.
Real tax systems layer social contributions, levies and phase-outs on top of this — the calculator above applies your country's actual 2026 rules, including those extras, and compares your full year with and without the bonus.
Frequently asked questions
Why is my bonus taxed so heavily?
A bonus stacks on top of your normal salary, so every dollar of it is taxed at your marginal rate — the highest rate that applies to your income. Employers also often withhold at a flat or aggregated rate on the payment itself, which can look even higher on the payslip.
Is bonus tax withholding the same as the tax I actually owe?
Not always. Withholding on a bonus is an estimate made by your payroll system. Your true liability is settled at year end through your tax return; if payroll over-withheld, the difference comes back as a refund.
Can I reduce the tax on my bonus?
In many countries, directing part of a bonus into a pre-tax vehicle — superannuation in Australia, a 401(k) in the US, or pension contributions in the UK — lets you keep more of it. Check contribution caps first, and see our salary calculator to model it.
Are bonuses taxed at a different rate from salary?
In most countries, no — a bonus is ordinary employment income and your final tax bill treats it exactly like salary. What differs is withholding on the day: some payroll systems apply a flat rate to one-off payments (the US, for example, commonly withholds a flat federal percentage on bonuses), and any difference from your true liability washes out in your annual return.
Will a bonus push me into a higher tax bracket and cost me money?
It can push the top slice of your income into a higher bracket, but only that slice is taxed at the higher rate — a bigger bonus always means more money in your pocket, never less. The rare exceptions are cliff-edge benefit withdrawals or surcharges that switch on above a threshold, which exist in some countries and are worth checking if you're near one.