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The progressive tax system explained clearly — no jargon.
The US federal income tax is progressive — meaning higher income is taxed at higher rates. But here's the key: each bracket rate only applies to the income within that bracket, not to all of your income.
If you earn $60,000 as a single filer in 2025, you are not paying 22% on all $60,000. You pay 10% on the first $11,925, 12% on the next chunk, and 22% only on the amount above $48,475. Your actual tax bill is significantly lower than 22% of $60,000.
Common Mistake
"If I get a raise and move into a higher bracket, I'll take home less money." This is false. Only the dollars above the bracket threshold are taxed at the higher rate. A raise always increases your take-home pay — your existing income is never retroactively taxed at the higher rate.
These rates apply to taxable income — not your gross salary. After deductions, most people's taxable income is considerably lower than what they earn.
10% of taxable income
$1,192.50 + 12% over $11,925
$5,578.50 + 22% over $48,475
$17,651.50 + 24% over $103,350
$40,199.50 + 32% over $197,300
$57,231.50 + 35% over $250,525
$188,769.75 + 37% over $626,350
* 2025 tax year. Married filing jointly brackets are roughly double these thresholds.
Single filer, $75,000 taxable income (2025)
Wages, salary, bonuses, self-employment income, interest, short-term capital gains. Taxed at the regular bracket rates above.
Profits from selling assets held more than one year. Taxed at preferential rates: 0%, 15%, or 20% depending on your income — significantly lower than ordinary rates.
Dividends from US corporations held long enough qualify for the same lower capital gains rates (0%, 15%, 20%) rather than ordinary income rates.
Up to 85% of Social Security income may be taxable depending on your combined income. The formula is complex — planning around it matters in retirement.
Your bracket is applied to taxable income — which is almost always less than your gross pay. Here's how it flows:
Gross income
All income from all sources
Above-the-line deductions
401(k), HSA, student loan interest, etc.
Adjusted Gross Income (AGI)
Threshold for many phase-outs and eligibility rules
Standard deduction
Or itemized deductions if higher (2025 single filer)
Taxable income
The number your bracket is applied to
Every tax planning decision — whether to contribute more to a 401(k), when to sell an investment, whether to do a Roth conversion — depends on knowing your current marginal rate. A pre-tax 401(k) contribution saves you exactly your marginal rate. If you're in the 22% bracket, $1,000 contributed costs you only $780 out of pocket.
The rate applied to your last dollar of income — i.e., the bracket you're currently in. Earning more does NOT push all your income into the higher bracket.
Your total tax bill divided by your total income. Almost always lower than your marginal rate because lower brackets apply to the first portions of your income.
Gross income minus above-the-line deductions and either the standard deduction or itemized deductions. This is the number your bracket is applied to — not your salary.
The actual dollar amount you owe the IRS before any tax credits are applied. Credits reduce your liability dollar for dollar.
Quick Summary