Income Tax Brackets
The U.S. federal income tax uses seven progressive brackets with rates from 10% to 37%. Each bracket rate only applies to the income within that range — not to your entire income.
Why It Matters
Understanding how brackets work is essential for comparing job offers, estimating tax liability, and avoiding the common misconception that earning more can "push all your income" into a higher bracket. Your effective tax rate (the blended average) is always lower than your marginal rate (the rate on your last dollar).
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Think of progressive brackets like filling buckets. Your first dollars fill the 10% bucket. Once that bucket is full ($11,925 for single filers in 2025), the next dollars spill into the 12% bucket, and so on up through 37%. You never pay the top rate on all your income — only on the portion that exceeds the last threshold. The IRS adjusts bracket thresholds annually for inflation.
Example
A single filer with $75,000 taxable income in 2025 pays: 10% on the first $11,925 ($1,192.50) + 12% on $11,926–$48,475 ($4,386) + 22% on $48,476–$75,000 ($5,835.50) = $11,414 total tax. That's an effective rate of 15.22%, not the 22% marginal rate.
Resources
Read the IRS inflation adjustments that set 2025 bracket thresholds
Revenue Procedure 2024-40 is the authoritative IRS document that sets inflation-adjusted tax parameters for 2025, including bracket thresholds, standard deduction amounts, and other key values.
Source: Internal Revenue Service (IRS)
See the official 2025 federal income tax bracket tables
The IRS page showing all seven bracket rates and thresholds for every filing status for tax year 2025. This is the primary official source for federal income tax rates.
Source: Internal Revenue Service (IRS)
Use IRS Publication 17 as a complete guide to filing your federal income tax
Publication 17 is the IRS's comprehensive guide for individual taxpayers. It covers filing requirements, standard deduction amounts, taxable income calculations, credits, and deductions for tax year 2025.
Source: Internal Revenue Service (IRS)
Frequently Asked Questions
Do I pay my highest tax rate on all my income?
No. The U.S. uses a progressive tax system where each bracket rate only applies to the income within that bracket range. Moving into a higher bracket only affects the dollars above the threshold, not your entire income.
This is the most common tax misconception. If you earn $60,000 as a single filer in 2025, you pay 10% on the first $11,925, 12% on income from $11,926 to $48,475, and 22% only on income from $48,476 to $60,000. There is never a scenario where earning $1 more results in less take-home pay due to bracket changes alone.
How are the 2025 tax brackets different from 2024?
The 2025 brackets use the same seven rates (10% through 37%) as 2024, but income thresholds increased roughly 2.8% for inflation. This means slightly more income is taxed at each lower rate.
Tax rates haven't changed since the Tax Cuts and Jobs Act of 2017. What changes annually is the income thresholds, adjusted for inflation per IRS Revenue Procedure 2024-40. For example, the 12% bracket for single filers went from $11,600 (2024) to $11,925 (2025). The standard deduction also increased, further expanded by the One Big Beautiful Bill Act (OBBBA) passed in 2025.
What is taxable income and how do I calculate it?
Taxable income is your gross income minus deductions. Most filers subtract the standard deduction: $15,750 for single, $31,500 for married filing jointly, or $23,625 for head of household in 2025.
The formula is: Taxable Income = Gross Income − Deductions. For example, a single filer earning $90,000 who takes the standard deduction: $90,000 − $15,750 = $74,250 taxable income. You can use either the standard deduction or itemize individual deductions (mortgage interest, charitable donations, etc.) — whichever is higher. About 90% of filers use the standard deduction.
What is the difference between marginal and effective tax rate?
Your marginal tax rate is the rate on your last dollar of income. Your effective tax rate is the average rate across all your income (total tax ÷ total income). Because of progressive brackets, your effective rate is always lower than your marginal rate.
For example, a single filer earning $75,000 in 2025 has a marginal rate of 22% (the bracket their last dollar falls in) but an effective rate of only 15.22% (total tax of $11,414 ÷ $75,000). The difference — nearly 7 percentage points — represents the tax savings from the progressive structure compared to a flat 22% tax on all income.
Key Terms
Next review: 2026-11-01 • Applies to tax year: 2025