Marginal Tax Rate

What Is the Marginal Tax Rate?

The marginal tax rate is the rate of tax you pay on your last dollar of income — or equivalently, the rate that would apply to any additional income you earn. It is not the rate applied to your entire income. In countries that use progressive tax systems (which includes the US, UK, Canada, Australia, India, and most others Tax Atlas covers), different slices of your income are taxed at different rates.

Understanding your marginal rate is essential for making good financial decisions: whether to take on extra freelance work, whether to defer income into a retirement account, or whether a pay rise will push you into a higher bracket.

How Marginal Rates Work: A Simple Example

Suppose you are a single filer in the United States earning $60,000 in 2026. The federal brackets (simplified) work like this:

• 10% on the first $11,600
• 12% on income from $11,601 to $47,150
• 22% on income from $47,151 to $100,525

Your marginal rate is 22% — because your last dollar of income falls in the 22% bracket. But you do not pay 22% on all $60,000. You pay 10% on the first slice, 12% on the middle slice, and 22% only on the top slice. The actual tax you owe as a share of total income is your effective tax rate, which will be lower than 22%.

Why It Matters

Extra income decisions. If someone offers you a $5,000 freelance project and your marginal rate is 40% (combined federal + state/provincial), you will keep around $3,000 after tax. Knowing this helps you set your rates and evaluate whether projects are worth your time.

Retirement contributions. In the US, contributing to a traditional 401(k) or IRA reduces your taxable income at your marginal rate. If you are in the 22% bracket, each $1,000 you contribute saves $220 in federal tax now (though you will pay tax on withdrawals in retirement).

Deductions and credits. A tax deduction saves you money at your marginal rate. A $1,000 deduction is worth $220 if your marginal rate is 22%, and $400 if your marginal rate is 40%. This is why deductions are more valuable for higher earners.

Bonuses and salary increases. A common misconception is that a raise can push you into a higher bracket and leave you worse off. This is mathematically impossible in a progressive system — only the income above the bracket threshold is taxed at the higher rate. A raise never reduces your net income.

Marginal Rates Around the World

Marginal rates vary significantly across countries, and comparing them without accounting for personal allowances, social security contributions, and other factors gives a misleading picture.

Country	Top marginal income tax rate (2026)	Threshold
United States	37% (federal)	$609,350+ (single)
United Kingdom	45%	£125,140+
India (new regime)	30%	₹15,00,000+
Canada	33% (federal)	CA$246,752+
Australia	45%	A$190,001+
New Zealand	39%	NZ$180,001+
Ireland	40%	€42,000+ (single)
Singapore	24%	S$1,000,000+
South Africa	45%	R1,817,001+

Note that these are income tax marginal rates only. Social security contributions (National Insurance in the UK, FICA in the US, CPP/EI in Canada, and their equivalents) add additional marginal rates at lower income levels.

The Combined Marginal Rate

In most countries, income tax is not the only thing taken from additional earnings. You may also face:

• National Insurance (UK): 8% on earnings between £12,570 and £50,270, then 2% above that — on top of income tax
• FICA (US): 7.65% on wages up to $176,100, then 1.45% above (employee share)
• Canada Pension Plan / Employment Insurance: CPP2 and EI add a few percent at most income levels
• State/provincial taxes: Most US states and all Canadian provinces add their own brackets on top of federal rates

When someone says they are in a “50% tax bracket,” they typically mean their combined marginal rate from all these sources together.

Common Misconceptions

“My whole income is taxed at my marginal rate.” No — only the income in that bracket. This is the single most common misunderstanding about progressive taxes.

“A bonus gets taxed at a higher rate than regular salary.” Employers sometimes withhold bonuses at a flat supplemental rate (22% federally in the US), but at tax time the total tax owed is computed the same way as all other income. You will receive any overwithholding as a refund.

“I should avoid earning more to stay in a lower bracket.” Since only the marginal income is taxed at the higher rate, crossing a bracket threshold never reduces your after-tax income.

Key Takeaway

Your marginal tax rate tells you the cost of your next dollar of income and the value of your next dollar of deduction. It is the number to use when making decisions about earning, saving, investing, and timing income or deductions. Use the Tax Atlas calculator to find your current marginal rate in seconds.