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Tax Brackets

Tax brackets are ranges of taxable income, each taxed at its own rate, so that higher portions of income are taxed at higher rates under a progressive tax system.

What Are Tax Brackets?

Tax brackets are the income ranges that a progressive income tax system uses to decide which rate applies to each part of a person's taxable income. Each bracket has a lower and upper limit and a specific marginal tax rate. Income that falls within a bracket is taxed at that bracket's rate, and income above it moves into the next, higher bracket.

How Tax Brackets Work

Only the income that falls inside a given bracket is taxed at that bracket's rate. Income in lower brackets remains taxed at the lower rates. This means that moving into a higher bracket does not raise the tax on all of your income, only on the dollars above the threshold. Many people misunderstand this, believing that a raise could leave them with less take-home pay overall. In a progressive system, that does not happen from the bracket change alone.

Tax authorities set bracket thresholds and rates in law, and they are often adjusted over time, for example to account for inflation. Filing status, such as single or married filing jointly, usually determines which set of brackets applies.

Example

Suppose a simplified system has three brackets: 10% on the first 10,000 of taxable income, 20% on income from 10,001 to 40,000, and 30% on income above 40,000. A taxpayer with 50,000 of taxable income would pay 10% on the first 10,000, which is 1,000, plus 20% on the next 30,000, which is 6,000, plus 30% on the final 10,000, which is 3,000. The total is 10,000, an average effective tax rate of 20%, even though the highest rate applied was 30%.

Why Tax Brackets Matter to Investors

Understanding brackets helps investors gauge how a given dollar of capital gains or dividend income will be taxed, since the bracket a person falls into can affect the rate on those earnings. Brackets also matter for decisions about the timing of income and deductions, because these choices can shift income between brackets. Investors generally benefit from understanding these rules as background, though specific tax planning is best handled with a qualified tax professional.

Updated October 17, 2026. For general education only; not financial, tax or legal advice.

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Related Terms

Taxable Income

Taxable income is the portion of a person's income that remains after allowable deductions and exemptions, and it is the amount on which income tax is actually calculated.

Marginal Tax Rate

The marginal tax rate is the tax percentage applied to the next dollar of taxable income, which is the highest bracket that income reaches under a progressive tax system.

Inflation

Inflation is the sustained rise in the general price level of goods and services over time, which reduces how much money can buy.

Effective Tax Rate (ETR)

The effective tax rate is the average percentage of a person's or company's total pre-tax income that is actually paid in taxes, as opposed to the statutory or marginal rate.

Capital Gain

A capital gain is the profit earned when an asset, such as a stock, bond, or property, is sold for more than its purchase price, or cost basis.

Progressive Tax

A progressive tax is one where the tax rate rises as the taxed amount increases, so higher earners or larger bases pay a larger share of their income or wealth.

Capital Gains Tax

A capital gains tax is a tax on the profit made when an asset, such as a stock, bond, or property, is sold for more than its original purchase price.

Standard Deduction

A fixed dollar amount that reduces a taxpayer's taxable income in the United States for those who do not itemize their deductions. The amount varies by filing status and is adjusted periodically.