What is the difference between marginal and effective tax rate?

Your marginal rate is the tax on your last dollar earned — your bracket. Your effective rate is total tax divided by total income, which is always lower because earlier dollars were taxed in lower brackets. A single filer earning $80,000 is in the 22% bracket but pays about 12% effective.

Does moving into a higher bracket lower my take-home pay?

No — this is the most common tax myth. Only the dollars above the bracket threshold are taxed at the higher rate; everything below keeps its lower rates. A raise never reduces your after-tax income under the bracket system.

Income Tax Calculator (2025 Federal)

Q: What are the 2025 federal tax brackets?

For single filers (taxable income): 10% up to $11,925; 12% to $48,475; 22% to $103,350; 24% to $197,300; 32% to $250,525; 35% to $626,350; 37% above. Married-filing-jointly thresholds are roughly double through the 32% bracket.

Q: What is the 2025 standard deduction?

$15,000 for single filers and $30,000 for married filing jointly. It reduces your taxable income before brackets apply; about 90% of filers take it instead of itemizing.

Q: Does this include tax credits like the Child Tax Credit?

No, this estimate covers tax brackets and deductions only. Tax credits reduce the final tax bill dollar-for-dollar and are not modeled here, so actual liability may be lower than this estimate for filers who qualify for credits.

Q: Does this calculator include state income tax?

No, this covers federal income tax only. Most U.S. states levy their own separate income tax with rates and brackets that vary widely, from 0% in no-income-tax states to over 10% in a few states.

Estimate your federal income tax with the official 2025 IRS brackets — and see the difference between the bracket you're "in" and the rate you actually pay.

Written by the Calculator Index team · Source: IRS Rev. Proc. 2024-40 (2025 tax year) · Last reviewed August 2026

Estimated federal income tax

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Taxable income

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Marginal rate (your bracket)

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Effective rate

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After federal tax

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Bracket	Income taxed in it	Tax

How U.S. brackets actually work

Brackets are marginal: each chunk of income is taxed at its own rate, like water filling stacked buckets. Landing "in the 22% bracket" means only the dollars above the 12% bracket's ceiling are taxed at 22% — never your whole income.

Taxable income = Gross − Pre-tax deductions − Standard (or itemized) deduction
Tax = Σ (income in each bracket × that bracket's rate)

Worked example — $80,000, single, 2025

Taxable income: 80,000 − 15,000 standard deduction = $65,000

10% × 11,925 = $1,193 · 12% × 36,550 = $4,386 · 22% × 16,525 = $3,636

Total ≈ $9,215 → effective rate 11.5% of gross, despite being "in the 22% bracket."

The bracket "staircase," visualized

Picture your income filling buckets from the bottom up. The first dollars fill the 10% bucket completely before any dollar spills into the 12% bucket, and so on. Only the bucket your last dollar lands in — your marginal bracket — taxes that specific slice at the higher rate. Everything below keeps its lower-rate treatment permanently.

Each step represents a bracket's rate, applied only to the income within that bracket — not your entire income.

2025 federal brackets (taxable income)

Rate	Single	Married filing jointly
10%	$0 – $11,925	$0 – $23,850
12%	to $48,475	to $96,950
22%	to $103,350	to $206,700
24%	to $197,300	to $394,600
32%	to $250,525	to $501,050
35%	to $626,350	to $751,600
37%	above	above

Source: IRS Rev. Proc. 2024-40 (2025 tax year inflation adjustments). This estimate covers federal income tax only — payroll taxes (Social Security and Medicare) are handled in the take-home pay calculator, and most states add their own income tax on top. Pre-tax retirement contributions reduce this bill directly, which is part of the 401(k) case.

Common mistakes when estimating income tax

Applying the marginal rate to all income. The single most common error — multiplying your entire salary by your top bracket's rate wildly overstates your bill. Only the slice within each bracket is taxed at that bracket's rate.
Forgetting pre-tax deductions. 401(k), traditional IRA, and HSA contributions reduce taxable income before brackets even apply — leaving them out of this calculator overstates your tax.
Ignoring tax credits. This estimate covers brackets and deductions only. Credits like the Child Tax Credit or education credits reduce tax owed dollar-for-dollar and are not modeled here — your actual bill may be meaningfully lower.
Forgetting state income tax exists separately. This is federal tax only. Most states layer their own income tax on top, with rates and brackets that vary widely by state.

Frequently asked questions

What are the 2025 federal tax brackets?

Single: 10% to $11,925, 12% to $48,475, 22% to $103,350, 24% to $197,300, 32% to $250,525, 35% to $626,350, 37% above. MFJ thresholds are roughly double through 32%.

Marginal vs. effective rate?

Marginal = rate on your last dollar (your bracket). Effective = total tax ÷ total income — always lower.

Does a higher bracket lower my take-home pay?

No — only dollars above each threshold are taxed at the higher rate. A raise never reduces after-tax income.

What is the 2025 standard deduction?

$15,000 single / $30,000 married filing jointly.

Does this include tax credits like the Child Tax Credit?

No — this estimate covers brackets, pre-tax deductions, and the standard or itemized deduction only. Credits reduce your final tax bill directly and can lower your actual liability well below this estimate.

Does this calculator include state income tax?

No, this is federal tax only. Most states charge their own income tax on top, with rates ranging from 0% in states with no income tax to over 10% in a few high-tax states — check your state's revenue department for exact figures.

Related calculators

Note: Federal income tax only, for tax year 2025, assuming no credits (child tax credit, EITC, etc.), which can change results substantially. Not tax advice — consult a professional or IRS.gov for your situation. Brackets: 2025 tax year (IRS Rev. Proc. 2024-40). Last reviewed: July 2026.