Tax Bracket Calculator: Why Your Marginal Rate Is Not Your Effective Rate
'I don't want a raise — it'll push me into a higher bracket.'
This is wrong. Understanding why requires understanding how marginal tax rates actually work.
How Marginal Tax Rates Work
The US has a progressive tax system. Higher rates apply only to income above each bracket threshold — not to all your income.
2024 single filer example:
- First $11,600 taxed at 10%
- $11,601 to $47,150 taxed at 12%
- $47,151 to $100,525 taxed at 22%
- $100,526 to $191,950 taxed at 24%
If you earn $55,000, you pay:
- 10% on the first $11,600 = $1,160
- 12% on the next $35,550 = $4,266
- 22% on the remaining $7,850 = $1,727
- Total tax: $7,153
Your marginal rate is 22% (the rate on your last dollar of income).
Your effective rate is 13% ($7,153 ÷ $55,000).
A $5,000 raise at $55,000 costs you $1,100 in additional federal tax (22% of $5,000). You keep $3,900. There is no scenario where a raise makes you net poorer.
Standard Deduction First
Before brackets even apply, the standard deduction ($14,600 for single filers in 2024) comes off the top. Your taxable income is your gross income minus deductions and adjustments.
State income taxes, FICA, Medicare — each adds to your total tax burden beyond federal income tax, making effective rates more complex. Our calculator handles all of it.
[Calculate your tax bracket →](https://doesitaddup.com)
Frequently Asked Questions
Will getting a raise push me into a higher tax bracket and make me worse off?
No. Only the income above the bracket threshold is taxed at the higher rate. If you earn a $5,000 raise at $55,000, you only pay the 22% marginal rate on that $5,000 ($1,100), keeping $3,900 of it. Your lower income is still taxed at the lower rates it always was.
What's the difference between my marginal rate and effective tax rate?
Your marginal rate is the tax rate applied to your last dollar of income—the bracket you're in. Your effective rate is your total tax divided by total income. For a $55,000 earner paying $7,153 in federal tax, the marginal rate is 22% but the effective rate is only 13%.
How do I calculate my taxable income for the tax bracket calculator?
Start with your gross income and subtract the standard deduction ($14,600 for single filers in 2024), plus any other adjustments and deductions you claim. The result is your taxable income, which is what actually gets plugged into the tax brackets.
Does the tax bracket calculator include state taxes and FICA?
Yes, our calculator handles federal income tax, state income taxes, FICA, and Medicare so you see your complete tax burden. These add significantly to your effective tax rate beyond just federal brackets alone.
This article is for informational purposes only. See our disclaimer.