How Do Tax Brackets Actually Work?

Short answer: the U.S. federal income tax is progressive, not flat. Your income is split into slices, and each slice is taxed at its own rate — 10% on the first slice, 12% on the next, and so on up to 37%. Moving into a higher bracket never taxes your earlier income at the higher rate, so a raise can never leave you with less take-home pay. A single filer earning $90,000 in 2026 sits in the 22% bracket but pays about $10,970 in federal income tax — an effective rate of just 12.2% of gross income.

Brackets apply to taxable income, not your salary

Tax brackets do not apply to your gross salary — they apply to your taxable income, what remains after deductions.

For most people, the first step is subtracting the standard deduction, a flat amount you can claim with no receipts and no paperwork. For the 2026 tax year (the return you file in early 2027), the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household, per IRS Revenue Procedure 2025-32.

So a single filer earning $90,000 does not feed $90,000 into the bracket table. After the $16,100 standard deduction, taxable income is $73,900 — that is the number the brackets work on. Pre-tax 401(k), traditional IRA, or HSA contributions shrink it further.

The seven brackets for 2026

For 2026, there are seven federal rates: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The rates did not change from 2025; the IRS adjusted the dollar thresholds upward for inflation:

Rate Single Married filing jointly
10% Up to $12,400 Up to $24,800
12% $12,401 – $50,400 $24,801 – $100,800
22% $50,401 – $105,700 $100,801 – $211,400
24% $105,701 – $201,775 $211,401 – $403,550
32% $201,776 – $256,225 $403,551 – $512,450
35% $256,226 – $640,600 $512,451 – $768,700
37% Over $640,600 Over $768,700

Think of each bracket as a bucket. Your first dollars fill the 10% bucket; only when it is full does income spill into the 12% bucket, and so on. Money already in a lower bucket stays taxed at that lower rate no matter how much more you earn.

A verified worked example

Take that single filer: $90,000 gross, $16,100 standard deduction, $73,900 taxable income. The tax is built slice by slice:

  • 10% on the first $12,400: $1,240
  • 12% on the next $38,000 ($12,401 to $50,400): $4,560
  • 22% on the remaining $23,500 ($50,401 to $73,900): $5,170

Total federal income tax: $1,240 + $4,560 + $5,170 = $10,970.

That one total hides three different rates:

  • Marginal rate: 22% — the rate on your last dollar, and on your next dollar too. An extra $1,000 of income costs about $220 in federal tax.
  • Effective rate on taxable income: 14.8% — $10,970 divided by $73,900.
  • Effective rate on gross income: 12.2% — $10,970 divided by $90,000.

When someone says “I’m in the 22% bracket,” they are naming their marginal rate. It is not the share of their income they pay in tax — that share is always lower, because most of their income was taxed at 10% and 12% first. The official figures behind this example are published by the IRS at irs.gov.

The myth that a raise costs you money

This is the fear the bucket picture kills. Suppose our filer’s taxable income rises from $73,900 to $110,000 — crossing from the 22% bracket into the 24% bracket. Only the dollars above $105,700 get the 24% rate; every dollar below it is taxed exactly as before. A higher bracket can only tax the new dollars at a higher rate.

One real caveat, though it is not about brackets: some credits and deductions phase out as income rises, so a raise can reduce eligibility for them. That is a separate mechanism from the bracket table itself.

Why your marginal rate still matters

Your effective rate tells you what you actually paid. Your marginal rate tells you what the next decision costs — overtime, freelance work, a side business, or a Roth conversion. It is also the rate that determines what a deduction is worth: a $1,000 deduction saves $220 at a 22% marginal rate, but only $120 at 12%.

Two practical uses follow: multiply a pre-tax retirement contribution by your marginal rate to estimate the tax saving, and remember that only the top slice of a raise faces your marginal rate — the rest of your pay is untouched. To model the gross-to-net picture for a raise or a new job, try our Salary Calculator.

What brackets do not cover

The bracket table covers federal income tax on ordinary income only — not state income tax, payroll taxes (Social Security and Medicare), or the separate 0%/15%/20% schedule for qualified dividends and long-term capital gains. Self-employment tax (15.3%) is also calculated separately, on top of income tax.

Frequently asked questions

If I move into a higher tax bracket, do I pay that rate on all my income?

No. Only the income inside the new bracket is taxed at the new rate. Everything below it keeps its original, lower rate. Crossing into a higher bracket can never reduce your take-home pay, because the higher rate touches only the dollars above the threshold.

What is the difference between my marginal rate and my effective rate?

Your marginal rate is the rate on your last dollar of taxable income — the rate your next dollar will face. Your effective rate is your total tax divided by your income, blending all the brackets together. The effective rate is almost always lower, and it is the better measure of your overall tax burden.

Do tax brackets apply to my gross salary or my taxable income?

They apply to taxable income — income after the standard deduction (or itemized deductions) and pre-tax contributions such as 401(k) deferrals. For 2026, a single filer subtracts a $16,100 standard deduction before any bracket applies, so the first $16,100 of salary is effectively taxed at 0%.

Why do the bracket thresholds change every year?

The IRS adjusts the thresholds annually for inflation, so that a purely inflation-driven pay rise does not push you into a higher bracket — a problem economists call bracket creep. The rates themselves (10% through 37%) only change when Congress passes new legislation.

PayoffCalc Editorial Team

Our guides are written to be genuinely useful: original explanations, worked examples, and methods you can verify. See our editorial standards.