๐Ÿงพ Finance ยท Tax

How to Calculate
Income Tax

Understand tax brackets, calculate your federal income tax, and see your effective tax rate with our free calculator.

How Tax Brackets Work

Tax is calculated progressively โ€” each bracket applies only to that slice of income:

Tax = ฮฃ (each bracket's rate ร— income in that bracket)
Taxable income = Gross income โ€“ Deductions
Marginal rate = rate on your highest dollar
Effective rate = Total tax รท Total income
๐Ÿ’ก Key insight: Being in the 22% bracket doesn't mean all your income is taxed at 22%. Only the income above the 12% threshold is taxed at 22%.

Income Tax Calculator (US 2024)

Federal Income Tax
$0
Marginal bracket: โ€”
Taxable Income
$0
Effective Rate
0%
After-Tax Income
$0
Monthly Take-Home
$0

2024 Tax Brackets (Single Filer)

RateIncome RangeTax on This Bracket
10%$0 โ€“ $11,600Up to $1,160
12%$11,601 โ€“ $47,150Up to $4,266
22%$47,151 โ€“ $100,525Up to $11,742
24%$100,526 โ€“ $191,950Up to $21,952
32%$191,951 โ€“ $243,725Up to $16,568
35%$243,726 โ€“ $609,350Up to $127,969
37%Over $609,35037% on remainder

Step-by-Step Guide

1

Start with gross income

This is your total income before any deductions โ€” wages, salary, freelance income, etc.

2

Subtract the standard deduction

For 2024: $14,600 (single), $29,200 (married jointly), $21,900 (head of household).

3

Apply brackets progressively

Example: $75,000 income โ€“ $14,600 deduction = $60,400 taxable. Apply 10% on first $11,600, 12% on next $35,550, 22% on remaining $13,250.

4

Sum up all bracket taxes

$1,160 + $4,266 + $2,915 = $8,341 total tax. Effective rate: 8,341 / 75,000 = 11.1%

Worked Examples

Entry Level โ€” $45,000

Taxable: $30,400
Brackets: 10%+12%
Effective: ~8.2%
Tax โ‰ˆ $3,694

Mid Income โ€” $75,000

Taxable: $60,400
Brackets: 10%+12%+22%
Effective: ~11.1%
Tax โ‰ˆ $8,341

High Income โ€” $150,000

Taxable: $135,400
Brackets: 10%โ†’24%
Effective: ~19.6%
Tax โ‰ˆ $29,367

Married โ€” $120,000

Taxable: $90,800
Standard: $29,200
Effective: ~12.4%
Tax โ‰ˆ $14,881

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Frequently Asked Questions

What is the difference between marginal and effective tax rate? โ–พ
Your marginal rate is the rate applied to your last dollar earned (your highest bracket). Your effective rate is total tax รท total income โ€” it's always lower than your marginal rate.
Does this calculator include state taxes? โ–พ
No, this calculator shows US federal income tax only. State income taxes vary from 0% (Florida, Texas, etc.) to over 13% (California) and must be calculated separately.
What deductions can I take? โ–พ
You can take the standard deduction ($14,600 single in 2024) or itemize deductions like mortgage interest, charitable donations, and state taxes paid. Choose whichever is larger.
What is FICA and is it included? โ–พ
FICA (Social Security 6.2% + Medicare 1.45% = 7.65%) is not included here. It's separate from income tax and applies to earned income up to the Social Security wage base.