Every year, millions of Americans avoid raises or side income because they fear it will "push them into a higher tax bracket." This is based on a misunderstanding of how the US tax system works. Your marginal tax rate only applies to the portion of income above each threshold — not your entire income.
What Is a Tax Bracket?
The US uses a progressive tax system with seven brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37% (2025). Each bracket is a range of taxable income. You pay the bracket rate only on the dollars within that range — not on your total income.
A Real Example
Say you're single with $60,000 in taxable income in 2025. Your tax is calculated in layers:
- First $11,925 taxed at 10% = $1,192.50
- $11,925–$48,475 taxed at 12% = $4,386.00
- $48,475–$60,000 taxed at 22% = $2,535.50
- Total federal tax: $8,114
Your marginal rate is 22% — but your effective rate is just 13.5%. The extra $1 you earn at $60,001 is taxed at 22%, not your average rate.
💡 Taxable income ≠ gross income. The brackets apply to your income after the standard deduction ($15,000 for single filers in 2025). A $75,000 salary becomes $60,000 in taxable income — a full bracket lower.
Marginal Rate vs Effective Rate
Your marginal rate is the rate on your next dollar of income. Your effective rate is total tax divided by total income — always lower than your marginal rate. High earners commonly have a 32% marginal rate but only a 22% effective rate because much of their income was taxed at lower rates.
Will a Raise Really Cost You Money?
No. Moving into a higher bracket means only the additional dollars are taxed at the higher rate. If a $5,000 raise bumps you into the 22% bracket, only the portion above the threshold is taxed at 22% — the rest is still taxed at 12%. You always keep more money from a raise than you pay in taxes on it.
Filing Status Matters Enormously
Married filing jointly gets brackets roughly twice as wide as single. Head of household gets intermediate brackets. This means two people with the same gross income can have very different tax bills based entirely on how they file.