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NL bijzonder tarief + Zvw
UK marginal rate + NI + trap warning
US flat 22% vs aggregate method
Pension sacrifice savings shown
2024 rates — estimate only
Home›Calculators›Tax Calculators›Annual Bonus Tax Calculator

Annual Bonus Tax Calculator 2024
How Much Tax Do You Pay on Your Bonus?

Calculate the tax on your annual bonus for the Netherlands, UK, and US. See net bonus after tax, marginal rate, FICA exposure, and how pension contributions can reduce your bonus tax bill.

Country
🆕
Netherlands Bonus Tax Calculator
Your Situation
€
Your gross annual salary before the bonus. Used to determine your tax bracket.
€
The full gross bonus before any tax deductions.
%
Pre-tax pension contribution on the bonus. Reduces taxable bonus and Zvw base.
%
Salary sacrifice on the bonus reduces income tax and National Insurance.
toggle
Scottish income tax bands apply to salary and bonus.
status
Affects federal tax brackets for the aggregate method.
%
Flat state rate on the bonus (e.g. CA ~9.3%, TX 0%).
$
Year-to-date wages already paid. Affects remaining Social Security cap ($168,600).
%
Pre-tax 401(k) contribution reduces federal and state taxable bonus.
Net Bonus
—
after all deductions
Tax on Bonus
—
income tax portion
Social on Bonus
—
NI / FICA / Zvw
Effective Bonus Rate
—
total deductions ÷ gross bonus
Gross Bonus
—
before tax
Income Tax on Bonus
—
at marginal rate
NI / FICA / Zvw
—
social contributions
Pension on Bonus
—
pre-tax sacrifice
Net Bonus
—
take-home
Marginal Rate
—
income tax rate on bonus
Effective Bonus Rate
—
all deductions
Take-Home %
—
net ÷ gross bonus
Bonus Tax Breakdown
Base Salary Only (Annual)
Gross salary—
Total tax & social—
Net take-home—
Effective rate—
Salary + Bonus (Annual)
Gross total—
Total tax & social—
Net take-home—
Effective rate—
Net Bonus at Different Bonus Amounts
Gross BonusIncome TaxSocialTotal DeductionsNet BonusEffective Rate
How Your Gross Bonus Is Split
Net bonus
Income tax
Social contributions
Pension
Estimate only. This calculator uses 2024 simplified rules. Actual bonus tax depends on payroll method, year-to-date deductions, employer scheme, and individual circumstances. It does not model all edge cases. Always verify with a payroll professional.
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🆕 Key Notes

NL: bijzonder tarief applies the marginal Box 1 rate to the bonus (36.97% or 49.50% + Zvw)
UK: bonus is taxed at your marginal rate; the £100K trap can create a 60% effective rate
US: most payroll systems withhold at 22% flat; true tax is settled at filing
Pension sacrifice on the bonus reduces income tax and social contributions in all three countries
Estimate only — confirm with a payroll professional

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Related Guides

How Bonus Tax Works→ UK Personal Allowance Trap→ Pension Sacrifice Explained→

How bonus tax works by country

A bonus is additional employment income and is generally taxed at your marginal income tax rate, since it sits on top of your regular salary. Social contributions may also apply depending on whether the bonus pushes wages above existing caps.

CountryTax MethodSocial ContributionsKey Risk
NetherlandsBijzonder tarief: marginal Box 1 rate (36.97% or 49.50%)Zvw 5.32% up to €71,624 capBonus pushing into 49.50% bracket
United KingdomMarginal PAYE rate (20% / 40% / 45%)NI 8% (up to £50,270) or 2% above£100K personal allowance trap (60% effective)
United StatesFlat 22% withholding OR aggregate methodSS 6.2% (if under $168,600 cap) + Medicare 1.45%Flat withholding under-withholds for high earners

The UK £100,000 personal allowance trap

If your base salary plus bonus takes total income above £100,000, the UK personal allowance is reduced by £1 for every £2 of income above that threshold. Combined with the 40% higher rate tax already applying, this produces an effective marginal rate of 60% on income between £100,000 and £125,140. A bonus that pushes you into this range can be particularly costly. One option is to sacrifice part of the bonus directly into a pension, which can bring total income back below £100,000 and restore the full personal allowance.

Frequently Asked Questions

Is my bonus taxed at a higher rate than my salary?+
Not at a higher rate as such, but since your bonus sits on top of your salary, it is taxed at your marginal rate rather than your average rate. If your salary already fills the basic rate band, for example, then every pound of bonus is taxed at the higher rate. The bonus does not cause your salary to be taxed more; only the bonus itself is taxed at the marginal rate.
What is the bijzonder tarief in the Netherlands?+
The bijzonder tarief is the special rate used by Dutch payroll to withhold tax on occasional or irregular payments such as bonuses, holiday pay, and end-of-year bonuses. The employer calculates the rate based on the employee’s annual salary to determine which Box 1 bracket applies. In practice this means the bonus is effectively withheld at the marginal rate: 36.97% for income up to €75,518 and 49.50% above that threshold.
What is the difference between the flat and aggregate method in the US?+
The flat method withholds 22% in federal income tax on the bonus regardless of total income. The aggregate method adds the bonus to regular wages, calculates the total federal tax, and withholds the difference. The flat method is simpler and is used by most payroll systems, but if your marginal rate is above 22% it will under-withhold. The aggregate method produces a more accurate withholding but can result in a large apparent deduction from the bonus payment.
How does pension sacrifice reduce bonus tax?+
If you direct part of your bonus into a pension before it is paid to you, that amount never becomes taxable employment income. In the UK this also reduces the National Insurance base. In the Netherlands it reduces the Box 1 taxable amount and the Zvw health contribution base. In the US a 401(k) contribution reduces federal and state taxable wages. The effective saving is the marginal tax rate multiplied by the pension amount, which for higher earners can be 40% or more.
Does my bonus affect National Insurance in the UK?+
Yes. National Insurance Class 1 employee contributions apply to bonuses in the same way as regular salary. If your annual salary is below the Upper Earnings Limit of £50,270, the portion of the bonus up to that limit is subject to 8% NI. Any bonus that takes total earnings above £50,270 is subject to 2% NI on the excess. The pension sacrifice option can reduce the NI base since salary sacrifice operates before NI is calculated.