How Tax Brackets Work: Marginal vs Effective Tax Rate
Tax brackets are one of the most misunderstood concepts in personal finance. Many people believe that moving into a higher tax bracket means paying that higher rate on their entire income — but that's not how the US progressive tax system works.
In the US federal system, tax brackets are applied in layers. Only the income that falls within each bracket's range is taxed at that bracket's rate. Your top bracket (marginal rate) only applies to the dollars above that threshold — never to the dollars below it.
Understanding this distinction between your marginal rate and your effective rate is essential for tax planning, evaluating job offers, and making sense of your paycheck.
What Is a Tax Bracket?
A tax bracket is an income range that is taxed at a specific rate. The US uses seven federal income tax brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. These are applied progressively — meaning as your income grows, only the portion above each threshold moves into the next bracket.
Think of it like filling buckets: the first bucket (10%) fills up first, then the 12% bucket, and so on. You never pay a higher rate on the income that already filled a lower bucket.
| Rate | Single (2026) | Married Filing Jointly (2026) | Head of Household (2026) |
|---|---|---|---|
| 10% | $0 – $11,925 | $0 – $23,850 | $0 – $17,000 |
| 12% | $11,926 – $48,475 | $23,851 – $96,950 | $17,001 – $64,850 |
| 22% | $48,476 – $103,350 | $96,951 – $206,700 | $64,851 – $103,350 |
| 24% | $103,351 – $197,300 | $206,701 – $394,600 | $103,351 – $197,300 |
| 32% | $197,301 – $250,525 | $394,601 – $501,050 | $197,301 – $250,500 |
| 35% | $250,526 – $626,350 | $501,051 – $751,600 | $250,501 – $626,350 |
| 37% | Over $626,350 | Over $751,600 | Over $626,350 |
Marginal vs Effective Tax Rate
Your marginal tax rate is the rate applied to your last (highest) dollar of taxable income — the top bracket you reach. If you are a single filer with $75,000 in taxable income in 2026, your marginal rate is 22% because your income exceeds the $48,475 threshold.
Your effective tax rate is your total federal income tax divided by your total income. It is always lower than your marginal rate because lower income is taxed at lower rates. For that same $75,000 single filer, the effective rate is approximately 13–14%.
Formula: Effective Rate = Total Federal Tax ÷ Gross Income × 100. This is the most accurate measure of your real tax burden.
Step-by-Step Example: $75,000 Single Filer in 2026
Let's walk through how a single filer with $90,000 gross income is taxed in 2026. First, they claim the $15,000 standard deduction, leaving $75,000 in taxable income.
10% bracket: $11,925 × 10% = $1,192.50
12% bracket: ($48,475 − $11,925) × 12% = $36,550 × 12% = $4,386.00
22% bracket: ($75,000 − $48,475) × 22% = $26,525 × 22% = $5,835.50
Total federal tax: $1,192.50 + $4,386 + $5,835.50 = $11,414
Effective rate = $11,414 ÷ $90,000 = 12.7% — not 22%, even though 22% is the marginal rate. The "raise into a higher bracket" raises the marginal rate but your overall tax burden increases gradually.
How to Lower Your Effective Tax Rate
The most powerful way to reduce your effective tax rate is to reduce taxable income through pre-tax deductions and contributions. Every dollar moved below the taxable income threshold is taxed at your marginal rate — so these savings are worth more for higher earners.
Key strategies: (1) 401(k) contributions up to $23,500 in 2026 — fully pre-tax for traditional accounts; (2) Traditional IRA up to $7,000 ($8,000 if 50+); (3) HSA contributions ($4,300 single/$8,550 family) if you have a qualifying high-deductible health plan; (4) Business deductions for self-employed individuals reduce both income tax and SE tax.
Additionally, maximizing itemized deductions (mortgage interest, SALT up to $10,000, charitable donations, medical expenses) can reduce taxable income below the standard deduction threshold for some taxpayers.
Common Tax Bracket Misconceptions
Myth: "Getting a raise could put me in a higher bracket and cost me more money overall."
False. Only the income above the bracket threshold is taxed at the higher rate. A raise always results in more after-tax income — the only question is how much of the raise goes to taxes.
Myth: "I'm in the 22% bracket, so I pay 22% of my income in taxes."
False. Your effective rate is significantly lower than your marginal rate because the 10% and 12% brackets fill first.
Myth: "Tax brackets are the same for everyone."
False. Married filing jointly brackets are exactly double the single brackets through the 32% bracket (avoiding the "marriage penalty"), and head of household has its own schedule.