Most people think a raise pushes their entire salary into a higher tax bracket, and that earning more can actually leave them poorer. It cannot, and this calculator shows you why. The US federal income tax is progressive: you do not pay one flat rate on all of your income. Instead, each chunk of your earnings is taxed at the rate of the bracket it falls into, and only the dollars above a bracket cutoff are hit by the next, higher rate. Your marginal tax rate is the rate you pay on your next dollar of taxable income, while your effective tax rate is the average rate across every dollar you actually earned.
Enter your taxable income and filing status below, and the tool walks the 2024 federal brackets slice by slice. You will see the bracket you land in (your marginal rate), the total federal tax owed, your true effective rate, and the after-tax income you keep.
How to Use
- Enter your Taxable Income. This is not your gross salary — it is the number on line 15 of Form 1040 after you subtract the standard deduction (or your itemized deductions) and any adjustments. For 2024 the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly.
- Choose your Filing Status — Single, Married Filing Jointly, Married Filing Separately, or Head of Household. The bracket dollar thresholds change with each status, so picking the right one matters.
- Enter your State Income Tax Rate as a rough percentage. If you live in one of the seven states with no broad income tax (Alaska, Florida, Nevada, South Dakota, Texas, Washington, or Wyoming), enter 0. This is a flat-rate estimate, not a full state bracket walk.
- Enter any Tax Credits you plan to claim — the Earned Income Tax Credit, Child Tax Credit, education credits, and similar. Credits cut your tax bill dollar for dollar, unlike deductions that only reduce taxable income.
- Read the result card. The Marginal Tax Rate tells you the price of earning one extra dollar. The Total Federal + State Tax combines the federal bracket math with your estimated state bill. The Effective Rate is total federal tax after credits divided by taxable income, and the After-Tax Income is what you actually keep after both federal and state.
How Progressive Brackets Actually Work
The 2024 federal ordinary-income brackets for a single filer are:
- 10% on income from $0 to $11,600
- 12% on income from $11,600 to $47,150
- 22% on income from $47,150 to $100,525
- 24% on income from $100,525 to $191,950
- 32% on income from $191,950 to $243,725
- 35% on income from $243,725 to $609,350
- 37% on income over $609,350
Suppose you are single with $85,000 of taxable income. The first $11,600 is taxed at 10% ($1,160). The next slice, from $11,600 to $47,150 — $35,550 — is taxed at 12% ($4,266). Only the remaining $37,850 (from $47,150 up to $85,000) is taxed at 22% ($8,327). Add them up: $13,753 of total federal tax. You are in the 22% marginal bracket, but your effective rate is only $13,753 ÷ $85,000 ≈ 16.18%. Earning one more dollar still costs 22 cents, but the dollars you already earned below $47,150 were never touched by 22%.
Marginal vs Effective Rate
This is the single most misunderstood idea in personal tax planning. Your marginal rate is the tax on your last dollar — and it is the number that should drive financial decisions. If you are weighing a Roth versus a traditional 401(k) contribution, a side hustle, or taking on extra contract work, ask what that next dollar costs: it costs your marginal rate, not your effective rate.
Your effective rate spreads the total tax across all of your income. Because the lowest brackets are taxed gently, the effective rate is always lower — often much lower — than the marginal rate. A single filer at $85,000 with a 22% marginal rate pays only about 16.18% on average. High earners feel the gap most sharply: someone with $1,200,000 of taxable income is in the top 37% marginal bracket but pays roughly 33.5% overall, because their first hundreds of thousands of dollars were still taxed at 10%, 12%, and 22%.
Examples
Example 1 — A single professional. Single filer, $85,000 taxable income. The tool shows a marginal rate of 22%, total federal tax of $13,753.00, an effective rate of 16.18%, and after-tax income of about $71,247. Only the portion above $47,150 is taxed at 22%; the lower two brackets together contribute $5,426.
Example 2 — A married couple. Married filing jointly, $200,000 taxable income. Because the MFJ brackets are roughly twice as wide, the couple stays in the 22% bracket. Total federal tax is about $34,106, the marginal rate is 22%, and the effective rate is about 17.05% — lower than a single filer earning the same amount, because the wider brackets shelter more income at 10% and 12%.
Example 3 — A high earner. Single filer, $1,200,000 taxable income. Every bracket is filled. The marginal rate is the top 37%, but because the first $609,350 is taxed through the lower schedules, total tax is roughly $402,188 and the effective rate lands near 33.52% — the gap between the two rates is about 3.5 percentage points of "free" bracket width.
FAQ
What is my marginal tax rate?
Your marginal tax rate is the rate applied to the next dollar of taxable income you earn. Find the bracket your taxable income falls into in the 2024 schedule for your filing status; the percentage for that bracket is your marginal rate. On $85,000 as a single filer, you are in the 22% bracket, so your marginal rate is 22%.
Why is my effective tax rate lower than my bracket?
Because the US uses progressive, tiered brackets. Only the dollars inside your top bracket are taxed at that high rate. The dollars in the lower brackets are still taxed at 10%, 12%, and so on. When you divide total tax by total income, the average — the effective rate — comes out below your marginal rate.
Does a raise push all of my income into a higher bracket?
No. This is the most common tax myth. A raise only taxes the new dollars at the higher marginal rate. Your existing income in lower brackets stays taxed at those lower rates. Crossing into the 22% bracket never retroactively raises your tax on the first $47,150.
What is the 2024 standard deduction?
For tax year 2024 it is $14,600 for Single and Married Filing Separately, $29,200 for Married Filing Jointly, and $21,900 for Head of Household. Subtract it from your gross income (along with any adjustments) to reach the taxable income this calculator asks for.
Which filing status should I choose?
Use the status that matches your return: Single if you are unmarried; Married Filing Jointly if you file together with a spouse; Married Filing Separately if you file apart; Head of Household if you are unmarried and pay more than half the cost of keeping up a home for a qualifying person. The bracket thresholds differ by status, so pick the one that reflects your actual filing.
Does this calculator include state tax or FICA?
No. This tool computes federal ordinary income tax only, using the 2024 IRS brackets. It does not add state income tax, Social Security and Medicare (FICA), the additional Medicare surtax, net investment income tax, or tax credits. Treat it as a clear look at the federal marginal and effective rate, then layer your state and payroll taxes on top for a complete picture.
Disclaimer
This marginal tax rate calculator is provided for informational purposes only and does not constitute tax, legal, or financial advice. Figures use the 2024 federal ordinary-income brackets published by the IRS and assume taxable income after deductions; they exclude state taxes, FICA, credits, and other adjustments. Actual liability depends on your full return. Always confirm your figures with a qualified tax professional before filing or making financial decisions.