How US Income Tax Works in 2026: Brackets, Rates and What You Actually Pay

The thing almost everyone gets wrong about US income tax is the bracket. People say "I'm in the 22% bracket" and mean "22% of my money goes to the government." That is not what a bracket is. A bracket is a slice: the 22% rate applies only to the dollars inside that slice, and the dollars below it are still taxed at 10% and 12%. A single filer earning US$80,000 in tax year 2025 sits in the 22% bracket and pays about 11.3% of gross income in federal income tax. Both numbers are true at once.

The second thing people get wrong this year is more specific: the standard deduction. The Internal Revenue Service published inflation-adjusted tax year 2025 figures in late 2024, and a great many guides and calculators copied them down. Then the One Big Beautiful Bill Act (P.L. 119-21) was signed on 4 July 2025 and raised those amounts. The old numbers are still circulating. If your working figure for tax year 2025 is US$15,000 single or US$30,000 married filing jointly, you are using superseded law.

This guide covers both of those, the bracket tables for both tax years, the four new deductions on a brand new schedule, the raised state and local tax cap, and the separate self-employment layer that catches freelancers out every year. Returns filed in early 2026 are tax year 2025 returns — every figure below is labelled, because mixing the two years is the most common way to get a wrong answer from correct numbers.

Who this guide is for

• Employees checking whether their withholding is roughly right
• Freelancers and sole proprietors meeting self-employment tax for the first time
• Anyone told "you'll lose half of it to tax" about a raise and wanting the real arithmetic
• People in high-tax states who gave up on itemising when the SALT cap was US$10,000
• Tipped and overtime-heavy workers, who have two new deductions for the first time
• Taxpayers aged 65 or over, who now have a separate deduction on top of the age addition
• Anyone comparing figures across two tax years and confused about why the maths moved

Quick answer

Federal income tax is charged in slices, from 10% up to 37%, and only the dollars inside each slice take that rate. Taxable income is what is left after your standard deduction, which for tax year 2025 is US$15,750 single or married filing separately, US$31,500 married filing jointly or qualifying surviving spouse, and US$23,625 head of household — the corrected post-OBBBA figures, not the earlier ones. For tax year 2026 it rises to US$16,100, US$32,200 and US$24,150, and the brackets move up with it. Four new deductions on Schedule 1-A are available whether or not you itemise: tips up to US$25,000, overtime up to US$12,500 (US$25,000 jointly), car loan interest up to US$10,000, and US$6,000 per eligible person aged 65 or over. The state and local tax cap is US$40,000 for tax year 2025 and US$40,400 for tax year 2026. If you are self-employed, add 15.3% self-employment tax on net earnings as a separate layer — Social Security capped at a wage base of US$176,100 for tax year 2025 and US$184,500 for tax year 2026, Medicare uncapped.

Marginal rate, effective rate, and why the confusion costs money

Your marginal rate is the rate on your next dollar of taxable income. Your effective rate is total tax divided by income. The marginal rate is always higher, usually by a wide margin.

This is not a semantic point. It changes decisions. People turn down overtime, delay invoicing or decline a bonus because they believe crossing a bracket boundary re-taxes everything they have already earned. It does not. Crossing into the 22% bracket means the dollars above the boundary are taxed at 22%. Not one dollar below it is affected. There is no cliff in the rate schedule.

Where cliffs do exist is in phase-outs, which is a different mechanism entirely. The tips and overtime deductions start shrinking once modified adjusted gross income passes US$150,000, or US$300,000 jointly. The senior deduction starts shrinking at US$75,000, or US$150,000 jointly. Car loan interest starts shrinking at US$100,000, or US$200,000 jointly. Those are the places where an extra dollar can cost you more than its own tax, because it also shaves a deduction. The brackets themselves are harmless.

Tax year 2025 brackets — for returns filed in early 2026

These apply to income earned in calendar year 2025, on the return due 15 April 2026. They come from the Internal Revenue Service's tax year 2025 inflation adjustments and were not changed by the July 2025 legislation.

Tax year 2026 brackets — for returns filed in early 2027

These come from Rev. Proc. 2025-32, published 9 October 2025, and apply to income earned in calendar year 2026 — the figures for planning, withholding and estimated tax during this year, not for the return you are filing now.

For married filing separately in tax year 2026, the top bracket threshold is US$384,350. If you file separately and are anywhere near that figure, check the schedule directly rather than assuming your brackets are half the joint ones all the way up.

The standard deduction, and the correction that matters

The standard deduction is what you subtract from income before the brackets touch it. Most filers take it rather than itemising, which makes it the largest number on the typical return after income itself.

Here is the correction. The tax year 2025 column above is not what was originally published. Rev. Proc. 2024-40 set the tax year 2025 standard deduction at US$15,000 single, US$30,000 married filing jointly and US$22,500 head of household. The One Big Beautiful Bill Act, enacted 4 July 2025, superseded those amounts mid-year and raised them to US$15,750, US$31,500 and US$23,625. Anything written between late 2024 and mid-2025 and not revised since carries the old numbers — a lot of blog posts, a lot of downloadable planners, and some calculators that have never been touched.

The practical effect for a single filer is US$750 more of income shielded from tax. At a 22% marginal rate that is US$165. Not life-changing, but if you built an estimated tax schedule on the old figure you overpaid.

On top of the standard deduction there is an additional amount if you are 65 or older or blind. It is charged per condition and the conditions stack, so someone who is both gets two. For tax year 2025 it is US$1,600 per condition, or US$2,000 if you are unmarried and not a surviving spouse. For tax year 2026 it is US$1,650 and US$2,050. This is separate from, and in addition to, the new senior deduction described below. The two are frequently confused and they are not the same thing.

Personal exemptions, meanwhile, are permanently US$0. There is no per-person allowance on top of the standard deduction, which is why the amounts look large compared with older guides.

The four new Schedule 1-A deductions

The One Big Beautiful Bill Act created a new form, Schedule 1-A, carrying four deductions available for tax years 2025 through 2028. The important structural point: all four are available whether or not you itemise. You do not give up your standard deduction to claim them, which makes them valuable in a way most deductions are not for the average filer.

Tips. Up to US$25,000 of qualified tip income. Phase-out begins at US$150,000 of modified adjusted gross income, or US$300,000 on a joint return. A Social Security number is required, married claimants must file jointly, and specified service trades or businesses are excluded.

Overtime. Up to US$12,500, or US$25,000 married filing jointly. Same phase-out thresholds and the same conditions as tips.

Car loan interest. Up to US$10,000, with the phase-out beginning lower — US$100,000, or US$200,000 jointly. The conditions are tight. The loan must have originated after 31 December 2024 and be secured by a lien on the vehicle. The vehicle must be new, for personal use, under 14,000 lbs gross vehicle weight rating, and have had final assembly in the United States. Leases do not qualify. The vehicle identification number goes on the return. Most people who assume they qualify because they have a car payment will not.

Senior deduction. US$6,000 per eligible person, so US$12,000 if both spouses qualify. You must have been born before 2 January 1961. Phase-out starts at US$75,000, or US$150,000 jointly. Again: this is on top of the age-based addition to the standard deduction, not instead of it.

The state and local tax cap

The cap on deducting state and local taxes was US$10,000 for years, which pushed most people in high-tax states out of itemising entirely. It has been raised substantially.

For tax year 2025 the cap is US$40,000, or US$20,000 married filing separately. It is reduced by 30% of modified adjusted gross income above US$500,000 — US$250,000 married filing separately — but never falls below US$10,000. For tax year 2026 the cap is US$40,400 and the reduction threshold rises to US$505,000.

SALT only matters if you itemise, and itemising only makes sense if your itemised total beats your standard deduction. With a US$40,000 cap against a US$15,750 standard deduction in tax year 2025, itemising is back on the table for people who stopped checking years ago. Run both.

Worked example: US$80,000, single, tax year 2025

Here is the arithmetic end to end, in the order the form does it.

1. Start with gross income: US$80,000, all wages on a W-2, no other income.
2. Subtract the standard deduction of US$15,750. Taxable income is US$64,250. Use the corrected figure, not US$15,000.
3. The 10% slice. The first US$11,925 at 10% is US$1,192.50.
4. The 12% slice. US$11,925 to US$48,475 is US$36,550, at 12% is US$4,386.00.
5. The 22% slice. US$48,475 up to US$64,250 is US$15,775, at 22% is US$3,470.50.
6. Add it up. Total federal income tax: US$9,049.00.
7. Effective rate. US$9,049 on US$80,000 of gross income is 11.3%. Against taxable income of US$64,250 it is 14.1%.
8. Compare. Marginal rate 22%, effective rate 11.3% — nearly double, and only the second describes what you pay.

The same income in tax year 2026 gives a slightly better result: a US$16,100 standard deduction leaves taxable income of US$63,900; 10% on the first US$12,400 is US$1,240; 12% on the US$38,000 up to US$50,400 is US$4,560; 22% on the remaining US$13,500 is US$2,970. Total US$8,770, an effective rate of about 11.0% on gross. That US$279 difference is inflation indexing, and it is why last year's table gives the wrong answer for this year's planning.

None of the above includes Social Security and Medicare withheld from wages, state income tax, or credits. It is the federal income tax line only.

Self-employment tax: the layer most people forget

If you work for an employer, payroll taxes are split with them and withheld before you see the money. Work for yourself and you pay both halves, on top of income tax.

The rate is 15.3% for both tax year 2025 and tax year 2026 — 12.4% for Social Security and 2.9% for Medicare. It is computed on Schedule SE and it kicks in at US$400 of net self-employment earnings. That threshold is low, it is not indexed, and a small side income can create an obligation on its own.

The Social Security component is capped by the wage base: US$176,100 for tax year 2025 and US$184,500 for tax year 2026, capping the Social Security part of self-employment tax at US$21,836.40 and US$22,878 respectively. Above the wage base you keep paying the 2.9% Medicare component, because Medicare is uncapped. There is also an Additional Medicare Tax of 0.9% above US$200,000 for most filers, US$250,000 married filing jointly, US$125,000 married filing separately. Those thresholds are not indexed.

Scale matters. On net self-employment earnings around US$80,000, 15.3% is roughly twelve thousand dollars — more than the US$9,049 of income tax in the worked example above. Schedule SE has steps that trim the base slightly, so treat that as an order of magnitude. For a mid-income freelancer, self-employment tax is frequently the larger of the two bills, and the one nobody budgets for.

Mistakes that cost money

Using the superseded tax year 2025 standard deduction. US$15,000, US$30,000 and US$22,500 are pre-OBBBA. The correct amounts are US$15,750, US$31,500 and US$23,625.

Mixing tax years. Returns filed in early 2026 use tax year 2025 brackets and deductions. The tax year 2026 figures are for planning, not for the return in front of you.

Assuming the bracket is the rate. It costs real money when people decline work believing a bracket crossing re-taxes everything. Only the dollars above the threshold take the higher rate.

Forgetting self-employment tax. A freelancer who budgets for income tax alone will be short by roughly the same amount again. Set money aside for both from the first invoice, and note that the US$400 threshold means a modest side income is not below the radar.

Assuming a car payment qualifies for the car loan interest deduction. The vehicle must be new, personally used, under 14,000 lbs, finally assembled in the United States, and bought with a lien-secured loan originated after 31 December 2024. Leases are out.

Not re-running the itemising comparison after the SALT change. At a US$40,000 cap for tax year 2025, itemising beats the standard deduction for many filers who stopped itemising when the cap was US$10,000.

Double-counting the senior amounts, or missing one. The age-based addition to the standard deduction and the US$6,000 senior deduction on Schedule 1-A are two separate things. Claim both if you qualify; do not claim one twice.

Edge cases worth knowing

Married filing separately is not half of joint. For tax year 2026 the standard deduction matches single at US$16,100 and the top threshold is US$384,350. Separate filing also costs you the tips and overtime deductions, both of which require a joint return if you are married.

Phase-outs are where the real cliffs sit. An extra dollar above US$75,000 of modified adjusted gross income does not just get taxed — it starts eroding the senior deduction. Above US$100,000 it erodes car loan interest, above US$150,000 tips and overtime, and above US$500,000 for tax year 2025 the SALT cap. If you can shift timing, the threshold matters more than the bracket.

Credits sit outside this arithmetic. The child tax credit is permanent at US$2,200 per qualifying child with up to US$1,700 refundable, and the adoption credit is refundable up to US$5,000. Credits come off tax owed, not off income, so they are worth more per dollar than a deduction.

Clean energy and electric vehicle credits are largely gone. The §30D and §25E vehicle credits ended for vehicles acquired after 30 September 2025. The §25C credit ended for property placed in service after 31 December 2025, §25D for expenditures after that date, and §30C after 30 June 2026.

Disclaimer

This guide explains general federal income tax rules and figures as published by the Internal Revenue Service and the Social Security Administration. It is information, not tax advice, and it does not account for state or local income tax, credits you may qualify for, or anything specific to your circumstances. Figures are labelled by tax year and were checked on 12 October 2026; tax law changed mid-year in 2025 and may change again. For a return involving business income, foreign income or equity compensation, pay a licensed preparer or an enrolled agent.

The short version

Brackets are slices, not rates. The 22% bracket means 22% on the dollars inside it and nothing more, which is why a single filer on US$80,000 of wages in tax year 2025 owes US$9,049 — an effective rate of 11.3% against a marginal rate of 22%. Both numbers are correct and only one tells you what you pay.

Get the standard deduction right before anything else. For tax year 2025 it is US$15,750 single, US$31,500 married filing jointly and US$23,625 head of household; any source still printing the older figures was written before 4 July 2025 and has not been updated. For tax year 2026 it is US$16,100, US$32,200 and US$24,150. Then check whether the four Schedule 1-A deductions reach you, since they do not require itemising, and whether the US$40,000 SALT cap has put itemising back in play.

If you are self-employed, treat self-employment tax as a second bill rather than a detail. At 15.3% on net earnings, with Social Security capped at a wage base of US$176,100 for tax year 2025 and US$184,500 for tax year 2026 and Medicare uncapped above it, it frequently exceeds the income tax beside it. The people caught out in April are rarely the ones who misread a bracket. They are the ones who never counted this layer at all.