Lesson
How tax brackets work
- Published:
- October 12, 2026
- Review status:
- Needs verification — carefully written, not yet checked by a qualified professional
Needs verification
- Current-year specific tax bracket dollar ranges and rates, since the IRS adjusts these annually for inflation.
We left these specific numbers out until they're checked against current official sources.
AThe super simple explanation
The U.S. federal income tax uses a system of brackets, where income is taxed at increasing rates as it rises.
Each bracket only applies to the portion of income that falls within it, not your entire income.
This means moving into a higher bracket doesn't cause all of your income to be taxed at the higher rate.
Your "marginal rate" is the rate on your last dollar earned; your "effective rate" is the average rate across all your income.
BWhy does this even matter?
- Understanding brackets correctly can prevent anxiety about a raise or bonus — you won't lose money overall by earning more.
- It helps explain why your paycheck withholding and your actual tax owed might differ.
- Knowing the difference between marginal and effective rates gives a more accurate picture of your true tax burden.
COkay, how does it work?
DShow me an example
Moving into a new bracket
Suppose (using simplified brackets) the first $11,000 of income is taxed at 10% and income from $11,000 to $44,000 is taxed at 12%.
Someone earning $45,000 pays 10% on the first $11,000 and 12% on the rest up to $44,000 — not 12% on their entire $45,000.
Illustrative example with made-up people and numbers — not current rates or rules.
EWords you should know
- Tax bracket
- A range of income taxed at a specific rate under a progressive tax system.
- Marginal tax rate
- The tax rate applied to your last (highest) dollar of income.
- Effective tax rate
- Your total tax paid divided by your total income, representing your average rate.
- Progressive tax system
- A tax system where rates increase as income increases.
FCommon mistakes
- Believing a raise or bonus that pushes you into a higher bracket means all your income gets taxed at that rate.
- Confusing your marginal rate with your effective (average) tax rate.
- Assuming tax brackets stay the same every year — they're typically adjusted annually.
- Forgetting that bracket thresholds differ by filing status.
GThings to know
- Tax bracket thresholds are adjusted annually, so check IRS.gov each year for current figures rather than relying on old numbers.
- There are different bracket thresholds for single filers, married filing jointly, married filing separately, and head of household.
- Only income above a given threshold is taxed at the next bracket's rate — this is sometimes called 'marginal' taxation.
- State income tax brackets, where they exist, are separate from federal brackets and set independently by each state.
HQuick recap
- The federal tax system uses multiple brackets, each taxing only the income within that range.
- Earning more and moving into a higher bracket only raises the rate on income above that threshold.
- Your marginal rate is your highest bracket; your effective rate is your overall average rate.
- Brackets are adjusted annually and differ by filing status.
IQuestions people are too embarrassed to ask
JQuiz me
Totally optional. Nobody's grading you.
KWhat next?
- 1.Look up the current year's federal tax brackets for your filing status on IRS.gov.
- 2.Calculate your own effective tax rate from a past return to compare it to your marginal bracket.
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