Federal income tax brackets use a marginal system, meaning your income is split into chunks and each chunk is taxed at a progressively higher rate. You don’t pay your highest rate on every dollar you earn. This is the single most important thing to understand about how taxes work in the United States, and it trips up a surprising number of people.
The Marginal System, Explained
Think of tax brackets like layers in a container. Your income fills up the lowest bracket first, then spills into the next one, then the next. Only the income inside each bracket gets taxed at that bracket’s rate.
For tax year 2026, a single filer faces seven brackets:
- 10% on taxable income up to $12,400
- 12% on income from $12,401 to $50,400
- 22% on income from $50,401 to $105,700
- 24% on income from $105,701 to $256,225
- 32% on income from $256,226 to $201,775… wait, let’s simplify
Here’s a concrete example. Say you’re a single filer with $80,000 in taxable income for 2026. Your tax isn’t simply 22% of $80,000 ($17,600). Instead, it’s calculated in layers: 10% on the first $12,400 ($1,240), then 12% on the next $38,000 ($4,560), then 22% on the remaining $29,600 ($6,512). Your total federal income tax comes to $12,312, which works out to about 15.4% of your taxable income.
That 22% is your marginal tax rate: the rate applied to your last dollar of income. The 15.4% is your effective tax rate: the actual share of your income that went to taxes. Your effective rate is always lower than your marginal rate (unless all your income fits in the 10% bracket).
2026 Federal Tax Brackets
The IRS adjusts bracket thresholds each year for inflation. For tax year 2026, the rates and thresholds for the three most common filing statuses are:
Single filers:
- 10%: $0 to $12,400
- 12%: $12,401 to $50,400
- 22%: $50,401 to $105,700
- 24%: $105,701 to $256,225
- 32%: $256,226 to $201,775
- 35%: over $256,225
- 37%: over $640,600
Married filing jointly:
- 10%: $0 to $24,800
- 12%: $24,801 to $100,800
- 22%: $100,801 to $211,400
- 24%: $211,401 to $512,450
- 32%: $512,451 to $403,550
- 35%: over $512,450
- 37%: over $768,700
Notice that the joint filer brackets are roughly double the single filer brackets at most levels. This is by design, so two single earners who marry don’t automatically jump into higher brackets.
How the Standard Deduction Shifts Your Starting Point
Tax brackets apply to your taxable income, not your gross income. The difference matters. Before your income enters the bracket system, you subtract either the standard deduction or your itemized deductions, whichever is larger. Most people take the standard deduction.
For 2026, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for head of household filers. This means a single person earning $66,100 in gross income would subtract $16,100, leaving $50,000 in taxable income. That $50,000 falls entirely within the 10% and 12% brackets, keeping this person’s marginal rate at 12% even though their salary might suggest otherwise.
The standard deduction essentially creates a zero-percent bracket: the first $16,100 you earn as a single filer isn’t taxed at all. This is easy to overlook when you’re scanning bracket tables, but it significantly lowers what you actually owe.
Marginal Rate vs. Effective Rate
Your marginal rate is the percentage applied to your next dollar of income. Your effective (or average) rate is your total tax divided by your total income. These two numbers serve different purposes.
Your effective rate tells you your actual tax burden: what share of your income the government takes. Your marginal rate tells you the tax cost of earning more. If you’re deciding whether to pick up freelance work, negotiate a raise, or sell an investment, your marginal rate is the one that matters because it determines how much of that additional income you’ll keep.
For example, a household earning $100,000 that pays $15,000 in federal income tax has an effective rate of 15%. But if that same household earns an additional $10,000, the extra income might be taxed at a combined marginal rate above 30% once you factor in payroll taxes. That’s a meaningful gap, and understanding it helps you plan.
Why a Raise Never Costs You Money
A persistent misconception is that earning more money can “push you into a higher bracket” and leave you worse off. This cannot happen under a marginal system. Only the income above the bracket threshold gets taxed at the higher rate. The income below it stays taxed at the same rates as before.
If you’re a single filer with $50,000 in taxable income (in the 12% bracket) and you get a $5,000 raise, only that $5,000 crosses into the 22% bracket. You’ll owe 22% on the extra $5,000, or $1,100, leaving you $3,900 ahead. Your tax on the first $50,000 doesn’t change at all. A raise always increases your take-home pay.
How State Income Taxes Add Another Layer
Federal brackets are only part of the picture. Most states also tax income, and they use different structures. About half the states with an income tax use a graduated bracket system similar to the federal one, though with different rates and thresholds. Around 15 states use a flat rate, charging the same percentage on all taxable income regardless of how much you earn. Eight states have no individual income tax at all.
State brackets stack on top of federal brackets. If your federal marginal rate is 22% and your state’s marginal rate is 5%, you’re effectively paying 27% on your last dollar of income (before considering any state-tax deduction on your federal return). When evaluating your total tax picture, add your state rate to your federal rate for a more complete view.
Strategies That Use Bracket Awareness
Once you understand how brackets work, several planning opportunities become clear.
Retirement contributions. Money you contribute to a traditional 401(k) or traditional IRA reduces your taxable income in the year you contribute. If your taxable income would otherwise put you $8,000 into the 22% bracket, contributing that $8,000 to a traditional 401(k) drops you back into the 12% bracket, saving you $1,760 in federal tax on that chunk of income. Roth contributions work in reverse: you pay tax now at your current marginal rate but withdraw tax-free in retirement, which can be advantageous if you expect to be in a higher bracket later.
Timing income and deductions. If you have flexibility about when you receive a bonus or realize investment gains, you can sometimes shift income into a year when your taxable income is lower, keeping more of it in a lower bracket. Similarly, bunching deductible expenses (like charitable donations) into a single year can push you above the standard deduction threshold, increasing the tax benefit.
Capital gains brackets. Long-term capital gains (from assets held over a year) have their own bracket structure with rates of 0%, 15%, and 20%. These rates are more favorable than ordinary income rates for most people, which is why holding investments for at least a year before selling can make a real difference in what you owe.
How Bracket Thresholds Change Over Time
The IRS adjusts bracket thresholds annually based on inflation. This prevents “bracket creep,” where inflation-driven raises push people into higher brackets without any real increase in purchasing power. The rate percentages themselves, however, are set by Congress and only change through legislation.
The current set of rates (10%, 12%, 22%, 24%, 32%, 35%, and 37%) was established by the Tax Cuts and Jobs Act of 2017. Congress recently extended these rates, but had they expired, several brackets would have risen: the 12% bracket would have reverted to 15%, the 22% to 25%, the 24% to 28%, and the top rate from 37% to 39.6%. The standard deduction also would have been cut roughly in half, to about $8,350 for single filers. Legislative changes like these are worth watching because they can meaningfully shift how much of your income falls into each bracket.