Tax Bracket Change Estimator
How does your income change affect your tax bracket?
Enter your current taxable income and a new income to compare. See which federal tax bracket each falls in, your marginal and effective rates, and how much of any raise is taken by additional tax.
Understanding tax bracket changes when your income rises or falls
One of the most persistent myths in personal finance is that earning more money can actually leave you worse off because a raise pushes you into a higher tax bracket. This misunderstands how the US federal income tax system works. The federal tax system is progressive, meaning higher rates apply only to the portion of income above each bracket threshold, not to your entire income. A raise that moves you into the 22 percent bracket does not mean all of your income is taxed at 22 percent — only the portion above the 22 percent threshold is.
The tax bracket change estimator uses the 2024 US federal income tax brackets for a single filer. These brackets reflect the IRS inflation adjustments for the 2024 tax year. The calculator shows two key rates: your marginal rate (the rate applied to the last dollar you earn) and your effective rate (the average rate across all your income). These two figures tell different stories, and understanding both is essential for making informed decisions about raises, side income, deductions, and retirement contributions.
Marginal rate versus effective rate
Your marginal tax rate is the rate that applies to your next dollar of income. If you earn $65,000 as a single filer in 2024, your marginal rate is 22 percent, because your income is in the 22 percent bracket. But your effective rate is significantly lower — closer to 13 to 14 percent — because your first $11,600 was taxed at 10 percent, the next portion at 12 percent, and only income above $47,150 at 22 percent. The marginal rate matters most for decisions about additional income, deductions, or tax-advantaged contributions. The effective rate tells you what share of your total income actually goes to federal tax.
How a raise affects your take-home pay
When you receive a raise, the additional income is taxed at your marginal rate, not your overall effective rate. This means that if you are in the 22 percent bracket, each additional dollar of income costs you 22 cents in federal tax, leaving 78 cents in take-home pay. A raise from $65,000 to $80,000 generates $15,000 in additional income, but approximately $3,300 of that goes to federal income tax. Your net take-home increase is closer to $11,700 at the federal level, before accounting for state income tax, FICA, and other withholdings. The estimator quantifies this precisely so you can plan cash flow from a new salary accurately.
Bracket thresholds for 2024 (single filer)
The 2024 federal income tax brackets for single filers are: 10 percent on income up to $11,600; 12 percent on income from $11,601 to $47,150; 22 percent on income from $47,151 to $100,525; 24 percent on income from $100,526 to $191,950; 32 percent on income from $191,951 to $243,725; 35 percent on income from $243,726 to $609,350; and 37 percent on income above $609,350. These thresholds are for taxable income — income after the standard deduction or itemised deductions — not gross income. For 2024, the standard deduction for a single filer is $14,600, meaning most people subtract $14,600 from their adjusted gross income before applying these brackets.
Decisions where marginal rate is the key number
Your marginal rate is the relevant figure for several important financial decisions. When evaluating a pre-tax retirement contribution to a 401k or traditional IRA, the immediate tax saving is your marginal rate multiplied by the contribution amount. Contributing $5,000 to a 401k at a 22 percent marginal rate saves $1,100 in current-year federal tax. When considering a side hustle, freelance project, or investment income, each additional dollar will be taxed at your marginal rate (and potentially self-employment tax for self-employment income). When deciding whether to itemise deductions or take the standard deduction, the value of each deductible dollar equals your marginal rate multiplied by the deduction amount.
Comparing income scenarios before negotiating
The tax bracket change estimator is useful when evaluating a job offer or salary negotiation to understand the after-tax value of different salary levels. A move from $100,000 to $105,000 crosses the 24 percent bracket threshold at $100,525 for a single filer. The first $525 of the $5,000 raise is still taxed at 22 percent, and the remaining $4,475 is taxed at 24 percent. The total additional federal tax on the raise is approximately $1,189 — not dramatically different from a raise that stays entirely within the 22 percent bracket, but slightly higher due to the bracket crossing. This estimator makes those comparisons concrete before a negotiation conversation.
Limitations of the estimator
This estimator uses 2024 federal income tax brackets for a single filer and treats the income entered as taxable income after deductions. It does not account for state income taxes, which vary significantly by state and can add anywhere from zero to over 13 percent in additional tax. It does not include FICA taxes (Social Security and Medicare), which add approximately 7.65 percent for employed workers and 15.3 percent for self-employed individuals. It does not apply the qualified business income deduction, net investment income tax, alternative minimum tax, or any other adjustment to the basic bracket calculation. For a complete tax picture, use the estimator alongside a full tax planning tool or consultation with a tax professional.
