Taxes: The Basics
A tax bracket only taxes the income that falls inside it, not your entire income at that rate. That single fact is why your effective rate is always lower than your top bracket, and why a raise can never shrink your paycheck.
“I don't want a raise, it'll push me into a higher bracket” is one of the most common pieces of financial folklore, and it describes something that cannot actually happen. A tax bracket only taxes the income that falls inside it — never your entire income at that rate.
A tax bracket only taxes the income inside it
The US uses a marginaltax system: income is sliced into bands, and each band is taxed only at its own rate. Someone earning $60,000 doesn't pay one rate on the full amount — the first slice is taxed at 10%, the next slice at 12%, and so on, only up to wherever their income actually stops.
Your effective rate is lower than your top bracket
Your marginal rate is the rate on your next dollar earned. Your effective rate is total tax divided by total income — a blend of every bracket you passed through on the way up. The effective rate is always lower than the marginal rate, often by a wide margin, because the earlier, lower-taxed slices are still part of the average.
- 10% bracket$11,600 taxed at this rate = $1,160
- 12% bracket$35,550 taxed at this rate = $4,266
- 22% bracket$12,850 taxed at this rate = $2,827
Marginal rate
22%
The rate on your next dollar earned.
Effective rate
13.8%
$8,253 total tax ÷ $60,000 income.
Why a raise can never actually shrink your paycheck
Move the slider above across a bracket boundary and watch what actually happens: only the new income above the line gets taxed at the new, higher rate. Every dollar below that line keeps being taxed exactly as it was before. A raise can never leave you with less take-home pay than before it — the closest that folklore gets to true is a raise pushing some benefit with its own separate income cutoff out of reach, which is a real consideration, but a completely different mechanism from the tax bracket itself.
Key takeaways
- A marginal tax system taxes each slice of income only at that slice's own rate, never the whole income at the top rate.
- Marginal rate is the rate on your next dollar; effective rate is total tax divided by total income, and it's always lower.
- Crossing into a higher bracket only raises the rate on the income above that line, not on anything earned below it.
- A raise can never reduce your take-home pay from tax brackets alone — any real cases of that come from separate income-based benefit cutoffs, not the bracket system itself.