Understanding Tax Brackets
The US uses a progressive (marginal) tax system. This means your income is divided into portions, and each portion is taxed at a different rate. Only the income within each bracket is taxed at that bracket's rate, not your entire income.
A common misconception is that moving into a higher bracket means all your income is taxed at the higher rate. In reality, only the dollars above the bracket threshold are taxed at the higher rate. This is why your effective rate is always lower than your marginal rate.
Frequently Asked Questions
Does moving to a higher bracket mean I pay more on all my income?
No. Only the income that falls within the higher bracket is taxed at that rate. Your lower-bracket income continues to be taxed at the lower rates. This is called marginal taxation.
What is the difference between marginal and effective rate?
Your marginal rate is the bracket your highest dollar of income falls into. Your effective rate is your total tax divided by total income, reflecting the blended rate across all brackets.
Do tax brackets change every year?
Yes, the IRS adjusts bracket thresholds annually for inflation. The rates themselves only change when Congress passes new tax legislation. Always use current-year brackets for planning.
How do I lower my tax bracket?
Contributing to pre-tax retirement accounts (401k, traditional IRA), HSAs, and maximizing deductions can reduce your taxable income and potentially keep you in a lower bracket.
Are capital gains taxed at these bracket rates?
Short-term capital gains are taxed as ordinary income using these brackets. Long-term capital gains have their own preferential rates of 0%, 15%, or 20% depending on your income level.