Marginal tax rate vs effective tax rate

Marginal tax rate vs effective tax rate is a question about two different averages of the same tax bill. Your marginal rate is what the next dollar you earn is taxed at. Your effective rate is your total tax divided by your income — the average across every dollar. For income tax, the marginal rate is always the higher of the two, and confusing them is where most tax-bracket myths come from. The take-home pay calculator shows both for your own salary; this page shows how they are built.

Marginal tax rate vs tax bracket

A tax bracket is a slice of income with its own rate. For 2026, the IRS sets these for a single filer, measured on taxable income — pay after the $16,100 standard deduction:

• 10% on the first $12,400
• 12% on the slice from $12,400 to $50,400
• 22% from $50,400 to $105,700
• 24% from $105,700 to $201,775
• 32% from $201,775 to $256,225
• 35% from $256,225 to $640,600
• 37% above $640,600

Each rate applies only to the income inside its own slice. Your marginal income tax rate is simply the rate of the highest slice you reach. “I'm in the 22% bracket” means the top part of your income is taxed at 22% — not all of it.

A worked example

A single filer earning $60,000, with the standard deduction and nothing else:

• Taxable income: $60,000 − $16,100 = $43,900
• 10% on the first $12,400 = $1,240
• 12% on the next $31,500 = $3,780
• Federal income tax: $5,020

The marginal rate is 12%: another $100 of pay adds $12 of income tax. The effective rate is $5,020 ÷ $60,000 = 8.37%. Two numbers, both correct, answering different questions.

Run the same way at other incomes:

• $100,000: income tax $13,170. Marginal 22%, effective 13.17%.
• $150,000: income tax $24,734. Marginal 24%, effective 16.49%.
• $100,000 for a married couple filing jointly: income tax $7,640. Marginal 12%, effective 7.64% — the joint brackets and deduction are twice as wide.

Why “effective tax rate” means different things on different sites

This is where published examples quietly disagree, and it is worth knowing before you compare numbers. There are three common versions, all for the same $60,000 earner:

• Income tax ÷ gross pay: 8.37%. The usual meaning, and the one used above.
• Income tax ÷ taxable income: 11.44%. Higher, because the deduction has been taken out of the bottom of the fraction.
• All federal tax ÷ gross, including Social Security and Medicare: 16.02%. The 7.65% payroll tax is on every dollar of wages here, so it adds straight on.

The same split applies to the marginal rate. The next dollar at $60,000 costs 12% in income tax, but 19.65% once the 7.65% for Social Security and Medicare is included. That second figure is the one that describes your paycheck, and it is what the take-home calculator reports. Examples elsewhere also often use an earlier year's brackets; the figures on this page are the 2026 ones, checked against the IRS release.

Can a raise push me into a higher bracket and lower my take-home?

Not through the brackets. Only the dollars above the threshold are taxed at the higher rate, so a raise always leaves you with more than before. Here is the exact case people worry about: a single filer crosses into the 22% bracket at $66,500 of pay, because $66,500 − $16,100 = $50,400.

• At $66,000, take-home after federal tax is $55,211.00.
• At $67,000, it is $55,964.50 — up $753.50.

Of the extra $1,000, the first $500 was taxed at 12% and the second $500 at 22%, plus 7.65% payroll tax on all of it: $246.50 in total. The rest of the salary did not change rate at all.

What can make a raise cost more than it pays is something outside the brackets switching off — a tax credit or a means-tested benefit with an income limit. Those depend on your circumstances and are not modelled on this site, so it does not put numbers on them. The bracket system on its own never does it.

Your marginal rate can go down as you earn more

One oddity the arithmetic turns up. Social Security tax stops at a wage base of $184,500 for 2026, per the Social Security Administration. So for a single filer, the all-in federal marginal rate is 31.65% at $180,000 of pay, but 25.45% at $190,000 — the 6.2% has dropped away. It rises again later: above $200,000 an extra 0.9% of Medicare tax starts, per the IRS. A marginal rate is not a staircase that only climbs.

Which one should I use?

That depends on the question, not on which is “right”. The marginal rate answers anything about a change: a raise, overtime, a bonus, or how much tax a pre-tax contribution avoids. For that last one, a 401(k) contribution escapes income tax but not Social Security or Medicare. The effective rate answers how much of your income goes in tax overall, and it is the better number for comparing years or budgeting. If you are working out what a raise is actually worth after inflation, the raise vs inflation calculator uses the marginal rate for exactly that.

Not tax advice. Worked examples use the site's sourced 2026 US federal figures for an employee taking the standard deduction, with no credits, no 401(k) and no state or local tax. Your own return may differ.