Marginal Tax Rate Calculator Formula
Understand the math behind the marginal tax rate calculator. Each variable explained with a worked example.
Formulas Used
Marginal Rate
marginal_bracket = marginal_rateTax on Extra Income
tax_on_raise = raise_amount * marginal_rate / 100After-Tax Extra Income
after_tax_raise = raise_amount * (1 - marginal_rate / 100)Variables
| Variable | Description | Default |
|---|---|---|
taxable_income | Taxable Income(USD) | 75000 |
raise_amount | Raise or Extra Income(USD) | 5000 |
marginal_rate | Derived value= taxable_income <= 11600 ? 10 : (taxable_income <= 47150 ? 12 : (taxable_income <= 100525 ? 22 : 24)) | calculated |
How It Works
Marginal Tax Rate
Your marginal rate is the tax rate on your next dollar of income. A $5,000 raise at 22% marginal rate means $1,100 in additional tax.
After-Tax Raise = Raise x (1 - Marginal Rate)
Important: Getting a raise never results in less take-home pay. Only the additional income is taxed at the higher rate.
Worked Example
$75,000 income with a $5,000 raise.
taxable_income = 75000raise_amount = 5000
- 01Marginal rate at $75,000 = 22%
- 02Tax on $5,000 raise = $5,000 x 22% = $1,100
- 03After-tax raise = $5,000 - $1,100 = $3,900
Ready to run the numbers?
Open Marginal Tax Rate Calculator