Your marginal tax rate is the rate you pay on your next dollar of income. Your effective tax rate is the total tax you pay divided by your income, which is your average rate across every dollar. Because the U.S. taxes income in brackets, your effective rate is always lower than your top marginal rate.
Each number answers a different question. The marginal rate tells you what a raise, extra shift or 401(k) contribution is worth after tax. The effective rate tells you how much of your total pay goes to taxes. Understanding marginal vs effective tax rate helps you make sense of both your pay stub and your tax return.
What is a marginal tax rate
Federal income tax uses brackets. For 2026, a single filer pays 10% on the first $12,400 of taxable income, 12% on income from $12,400 to $50,400, 22% from $50,400 to $105,700, and so on up to 37%. Your marginal rate is the bracket your last dollar falls into.
When people say "I'm in the 22% bracket," they're describing their marginal rate. It doesn't mean they pay 22% of their income in federal tax. See the full 2026 federal brackets for every filing status.
Your combined marginal rate
For paycheck decisions, the federal bracket is only part of the picture. The tax on your next dollar of wages usually includes:
- Your federal bracket rate
- Your state's bracket rate, if your state taxes wages
- Social Security (6.2%) and Medicare (1.45%), as long as you're under the $184,500 Social Security wage base
- Any local income tax
What is an effective tax rate
Your effective rate is total tax divided by income. There are a few ways to measure it, so be clear which one you're using:
- Federal income tax ÷ gross income: the most common version, and the one used in examples below.
- Federal income tax ÷ taxable income: higher, because the denominator excludes the standard deduction.
- All taxes ÷ gross pay: includes FICA and state tax. This is the "how much of my paycheck goes to taxes" number.
Our guide to how much of your salary goes to taxes uses the third definition.
Example: a married couple in Minnesota earning $130,000
Consider a married couple filing jointly in Minnesota with one earner making $130,000, paid biweekly, with no pre-tax deductions. These are estimates from the Minnesota paycheck calculator.
Finding the marginal rate
- Federal: taxable income is $130,000 − $32,200 = $97,800. That's below $100,800, so the couple is in the 12% bracket.
- Minnesota: state taxable income is $130,000 − $30,600 = $99,400, which falls in Minnesota's 6.8% bracket for joint filers.
- FICA: 7.65%.
Combined marginal rate: 12% + 6.8% + 7.65% = 26.45%.
Finding the effective rate
| Tax | Annual amount | Effective rate (of $130,000) |
|---|---|---|
| Federal income tax | $11,240 | 8.65% |
| Social Security | $8,060 | 6.20% |
| Medicare | $1,885 | 1.45% |
| Minnesota income tax | $6,053 | 4.66% |
| Total | $27,238 | 20.95% |
So this household faces about 26% tax on its next dollar, but pays about 21% of its total pay in taxes. The federal gap is especially wide: a 12% marginal rate but an 8.65% effective federal rate, because the first $32,200 isn't taxed at all and the next $24,800 is taxed at 10%.
Example: a single filer in Minnesota earning $45,000
Now a single filer in the same state earning $45,000, paid biweekly.
| Item | Single, $45,000 | Married jointly, $130,000 |
|---|---|---|
| Federal marginal rate | 12% | 12% |
| Minnesota marginal rate | 5.35% | 6.8% |
| Combined marginal rate (with FICA) | 25% | 26.45% |
| Effective federal rate | 7.16% | 8.65% |
| Effective rate, all taxes | 18.34% | 20.95% |
| Take-home per paycheck | $1,413.40 | $3,952.38 |
Despite a very different income, the single filer's federal bracket is the same 12%, because the married couple gets brackets twice as wide. This is why filing status matters so much. Read how filing status affects your paycheck for more.
Minnesota employees also start paying a paid leave premium in 2026, which isn't included in these estimates.
When to use each rate
Use your marginal rate for decisions at the edges
- A raise: for the married couple, a $1,000 raise adds about $264.50 in taxes (26.45%), leaving about $735.50. See how much of a raise you actually keep.
- Extra hours or a side gig: extra income is taxed at your marginal rate, not your average. Self-employment income has its own 15.3% self-employment tax instead of the 7.65% employee share.
- Traditional 401(k) contributions: each dollar you defer avoids your federal and (in most states) state marginal rate. For the couple, a $1,000 contribution cuts income tax by about $188 (12% + 6.8%). It doesn't reduce Social Security or Medicare.
Use your effective rate for the big picture
- Comparing your overall tax burden between years
- Comparing job offers in different states
- Budgeting, where what matters is total take-home pay
Common mistakes
- Using the marginal rate to estimate total tax. Multiplying $130,000 by 26.45% would overstate this couple's taxes by more than $7,000.
- Using the effective rate to judge a raise. The raise is taxed at the top rate, not the average.
- Forgetting the Social Security cap. Once wages pass $184,500, the 6.2% stops, so high earners' combined marginal rate drops for the rest of the year. Additional Medicare Tax of 0.9% can apply above $200,000.
- Ignoring the state. In a no-tax state like Texas, the state piece is zero; in a high-bracket state it can add several points.
The paycheck calculator shows both your per-paycheck taxes and your overall effective rate for any salary, state and filing status.
Frequently Asked Questions
Is my effective tax rate always lower than my marginal rate?
For federal income tax with progressive brackets, yes, because lower brackets and the standard deduction pull your average down. In a flat-tax state, the state's marginal and effective rates are much closer.
Which rate shows on my W-2 or pay stub?
Neither is printed directly. You can work out your effective rate by dividing the tax withheld by your gross pay.
Does moving into a higher bracket reduce my take-home pay?
No. Only the dollars above the bracket threshold are taxed at the higher rate, so earning more always leaves you with more after tax under regular bracket rules.
Should FICA be included in my marginal rate?
For wage decisions, yes, since Social Security and Medicare apply to each extra dollar of wages up to the wage base. For comparing income tax alone, leave it out.
Sources
- IRS Revenue Procedure 2025-32
- IRS Topic 751: Social Security and Medicare Withholding Rates
- Tax Foundation: State Income Tax Rates for 2026
Run the numbers for your state
Written and checked against IRS, Social Security Administration and state tax agency publications for the 2026 tax year. General information, not tax, legal or financial advice. Read our editorial policy, calculation methodology and sources.