How Tax Brackets Work
Progressive tax systems apply increasing rates to successive portions of income. In the US, the first $11,600 of taxable income (2024) is taxed at 10%, the next portion at 12%, then 22%, 24%, 32%, 35%, and 37% for income above $578,125. Crucially, only the income within each bracket is taxed at that bracket's rate. Moving into a higher bracket does not retroactively increase the tax on income already in lower brackets.
The Common Misconception
The belief that earning more can result in less take-home pay due to higher tax brackets is false. If your taxable income crosses from the 22% bracket into the 24% bracket, only the dollars above the threshold are taxed at 24%. Your effective (average) tax rate always increases gradually, never in a way that makes a raise counterproductive. Understanding this eliminates irrational fear of earning more.
Using Your Bracket for Tax Strategy
Knowing your marginal tax bracket determines the value of deductions. A $10,000 tax-deductible retirement contribution saves $2,200 for someone in the 22% bracket but $3,200 for someone in the 32% bracket. Higher-bracket taxpayers benefit more from traditional (pre-tax) retirement accounts, while lower-bracket taxpayers may prefer Roth (after-tax) accounts. Strategic timing of income and deductions across tax years can keep you in lower brackets.