# How do tax brackets work? A step-by-step guide

Source: https://taxbracketsdesk.com/federal-tax-brackets/how-tax-brackets-work
Publisher: Tax Brackets Desk (taxbracketsdesk.com), independent editorial site
Topic: Federal Tax Brackets
Last updated: 2026-09-18

> How do tax brackets work? Your taxable income is cut into slices, and each slice is taxed at its own rate. A single filer with $80,000 of taxable income in 2026 pays 10% on the first $12,400, 12% on the next $38,000 and 22% on the last $29,600, for $12,312 in total. Moving into a higher bracket only raises the rate on the dollars inside it.

## Key facts

- What brackets apply to: Taxable income, after deductions
- Example: $80,000 taxable, single, 2026: $12,312 tax, 15.4% effective, 22% marginal
- Extra tax on a $1,000 raise crossing into 22%: $180 in the example below
- Federal rates: 10%, 12%, 22%, 24%, 32%, 35%, 37%

## Tax brackets explained: they tax slices, not your whole income

The federal income tax is a progressive tax system: higher slices of income are taxed at higher rates. Think of your taxable income as water filling a row of buckets. The first bucket fills at 10%, the overflow goes into the 12% bucket, and so on. The rate on each bucket never changes based on how much lands in later ones.

That is the whole answer to how does a tax bracket work. Being in the 22% bracket means your last dollars are taxed at 22%. Your first dollars are still taxed at 10% and 12%, exactly as they are for someone who earns much less.

For 2026 there are seven rates, 10% through 37%, and each filing status has its own bucket sizes. The full tables are on the [tax brackets by year](https://taxbracketsdesk.com/federal-tax-brackets) page. This guide uses the single schedule, then shows the same method for a married couple.

## Are brackets applied to gross or taxable income?

Taxable income. Several subtractions happen before any bracket is applied, and skipping them is the most common reason people overestimate their tax.

1. **Total income** includes wages, interest, business profit, retirement withdrawals and other taxable items.
2. **Adjustments** such as deductible IRA contributions, student loan interest (up to $2,500) and half of self-employment tax reduce it to adjusted gross income (AGI).
3. **Deductions** come off AGI: the standard deduction ($16,100 single, $32,200 joint, $24,150 head of household for 2026) or your itemized total, plus Schedule 1-A deductions such as qualified tips or the senior deduction.
4. **Taxable income** is what remains. This is the number that goes into the brackets.

The IRS walks through this sequence on Form 1040 itself, and our taxable income guide covers each line in more depth.

## Step-by-step calculation for 2026

Example: a single filer earns $96,100 in wages, has no adjustments and takes the $16,100 standard deduction. Taxable income is **$80,000**.

| Slice of taxable income | Rate | Dollars in slice | Tax on slice |
| --- | --- | --- | --- |
| $0 to $12,400 | 10% | $12,400 | $1,240 |
| $12,401 to $50,400 | 12% | $38,000 | $4,560 |
| $50,401 to $80,000 | 22% | $29,600 | $6,512 |
| Total |  | $80,000 | $12,312 |

Tax on $80,000 of taxable income, single, 2026

The 24% and higher rates play no part, because no income reaches them. Of the $12,312 total, more than half comes from the 22% slice even though that slice holds only 37% of the income.

### Three numbers to take from the result

- **Marginal rate: 22%.** Each extra dollar of taxable income costs 22 cents in federal income tax. See [marginal tax rate](https://taxbracketsdesk.com/federal-tax-brackets/marginal-tax-rate-explained).
- **Effective rate on taxable income: 15.4%** ($12,312 divided by $80,000).
- **Effective rate on wages: 12.8%** ($12,312 divided by $96,100). The [effective tax rate](https://taxbracketsdesk.com/federal-tax-brackets/effective-tax-rate-explained) page explains which version to use when.

### The same method for a married couple

A couple filing jointly with the same $80,000 of taxable income uses wider slices: 10% on $24,800 ($2,480) and 12% on the remaining $55,200 ($6,624). Their total is $9,104, and they never touch the 22% rate. Filing status changes the slice sizes, not the method. If you are unmarried and support a child or relative, check the [head of household requirements](https://taxbracketsdesk.com/federal-tax-brackets/head-of-household-requirements), since that status has wider low slices than single.

## Does moving into a higher bracket tax all my income more?

No. This is the most repeated tax myth. Crossing a bracket line changes the rate only on the dollars above the line.

Take a single filer whose taxable income rises from $50,000 to $51,000 in 2026. At $50,000 the tax is $5,752. At $51,000 it is $5,932. The raise added $180 of tax: 12% on the $400 still below $50,400, and 22% on the $600 above it. The other $50,000 is taxed exactly as before, and the person keeps $820 of the $1,000.

> **Why your paycheck can look off:** Withholding is an estimate. A bonus may be withheld at the flat 22% supplemental rate even if your actual bracket is 12%, and the difference comes back as a refund when you file. That is a withholding effect, not a bracket penalty.

## Worked example: a raise and a 401(k) change together

Brackets also explain why pre-tax savings feel cheaper than they look. Return to the single filer with $96,100 of wages and $80,000 of taxable income, who owes $12,312.

1. The employer gives a $6,000 raise. Wages become $102,100 and taxable income $86,000. All $6,000 falls in the 22% slice, so income tax rises by $1,320 to $13,632.
2. The worker then raises traditional 401(k) deferrals by $6,000. Taxable wages drop back to $96,100 and taxable income to $80,000. Income tax returns to $12,312.
3. Net effect: $6,000 more saved for retirement, while take-home pay falls by only the Social Security and Medicare tax on the raise ($459 at 7.65%). Pre-tax deferrals do not reduce those payroll taxes.

The same logic works in reverse. Withdrawing $6,000 from a traditional IRA in a year when you are already in the 22% bracket adds $1,320 of federal income tax. In a year with little other income, the same withdrawal might be taxed at 10% or 12%, or not at all if it fits under the standard deduction.

> **Check your own numbers:** Take the taxable income from your last return, find its slice in the table for that year and your status, and redo the math above. If your result is close to the tax line on the return, you have the method right.

## Can a raise make me take home less?

Not through the brackets. The bracket system alone always leaves you with more money after a raise. A net loss can only happen where a benefit ends abruptly at an income line, which is called a cliff.

- **Premium tax credit.** From 2026, households above 400% of the federal poverty line are not eligible for the marketplace health credit, and there is no cap on paying back advance credit you received. A small raise past that line can cost far more than the raise.
- **Phaseouts.** Credits such as the earned income credit shrink gradually as income rises. They do not create a cliff, but they raise your real marginal rate above your bracket rate.
- **Non-tax benefits.** Some state and local assistance programs use hard income limits. These sit outside federal tax rules, so check them separately.

If you think you are near a cliff, estimate your income early in the year. A deductible IRA contribution or larger pre-tax retirement deferral can lower AGI below the line.

## Brackets vs deductions vs credits

Once you see how brackets work, the difference between a deduction and a credit becomes simple arithmetic.

- **A deduction** removes income from your top slice. A $1,000 deduction saves $220 for someone in the 22% bracket and $120 for someone in the 12% bracket.
- **A credit** comes off the tax itself, dollar for dollar. The $2,200 Child Tax Credit cuts tax by $2,200 regardless of bracket, subject to its income limits.
- **Capital gains and qualified dividends** use their own rates of 0%, 15% or 20%. They sit on top of ordinary income, so the 0% rate applies only to the part that fits under $49,450 of total taxable income for a single filer in 2026. See long-term capital gains tax.

The IRS Form 1040 instructions include a Tax Table and a worksheet built from these same rates. The Tax Table groups incomes into small ranges, so its answer can differ from the formula by a few dollars. To run your own numbers, use the tax bracket calculator.

## Step by step

1. **Add up total income.** Include wages, interest, dividends, business profit, retirement distributions and other taxable income.
2. **Subtract adjustments.** Take off above-the-line items such as deductible IRA contributions and student loan interest to reach adjusted gross income.
3. **Subtract deductions.** Subtract the standard deduction or itemized deductions, plus any Schedule 1-A deductions, to get taxable income.
4. **Apply each bracket to its slice.** Multiply the income inside each bracket for your filing status by that bracket's rate, then add the results.
5. **Subtract credits.** Take nonrefundable and refundable credits off the bracket tax to reach the tax you owe or the refund due.

## Common questions

### Do you pay the tax bracket rate on all your income?

No. Each rate applies only to the income inside its range. Someone in the 24% bracket still pays 10% and 12% on their first slices of taxable income.

### How is the progressive tax system different from a flat tax?

A flat tax charges one rate on all taxable income. The federal system uses seven rising rates, so the share of income paid grows as income grows.

### If I get a $1,000 raise, how much goes to federal income tax?

Your marginal rate times the raise. In the 22% bracket that is $220; if the raise straddles two brackets, part is taxed at each rate.

### Why is my effective tax rate lower than my bracket?

Because your lower slices are taxed at lower rates, and deductions keep some income from being taxed at all. The effective rate averages all of that.

### Does a bonus push you into a higher tax bracket?

It can move your top dollars into a higher bracket, but only the bonus dollars above the line are taxed at the higher rate. Withholding on the bonus may differ from the final tax.

## Sources

- [Rev. Proc. 2025-32](https://www.irs.gov/pub/irs-drop/rp-25-32.pdf)
- [IRS: Federal income tax rates and brackets](https://www.irs.gov/filing/federal-income-tax-rates-and-brackets)
- [IRS Publication 505 (2026)](https://www.irs.gov/pub/irs-pdf/p505.pdf)
- [IRS Publication 15, Employer's Tax Guide](https://www.irs.gov/pub/irs-pdf/p15.pdf)