How US Federal Income Tax Brackets Work in 2024

The United States federal income tax is progressive — meaning higher income is taxed at higher rates. But here is the critical concept most people misunderstand: you do not pay the higher rate on all your income, only on the portion above each threshold.

This is why a single person earning $50,000 does not suddenly face an enormous tax bill if they get a raise to $48,000 instead of staying at $47,000. Moving into a higher bracket only affects the additional income, not your entire salary.

After subtracting your standard deduction ($14,600 for single filers in 2024), your remaining taxable income falls into these brackets:

• 10%: $0 – $11,600
• 12%: $11,601 – $47,150
• 22%: $47,151 – $100,525
• 24%: $100,526 – $191,950
• 32%: $191,951 – $243,725
• 35%: $243,726 – $609,350
• 37%: Over $609,350

These brackets apply to taxable income, not gross income. Taxable income = gross income − adjustments − standard (or itemized) deductions.

Married couples filing jointly benefit from wider brackets (roughly doubled) and a larger standard deduction ($29,200):

• 10%: $0 – $23,200
• 12%: $23,201 – $94,300
• 22%: $94,301 – $201,050
• 24%: $201,051 – $383,900
• 32%: $383,901 – $487,450
• 35%: $487,451 – $731,200
• 37%: Over $731,200

Step 1: Start with $90,000 gross salary. Step 2: Subtract standard deduction: $90,000 − $14,600 = $75,400 taxable income. Step 3: Apply brackets:

• $0–$11,600 @ 10% = $1,160.00
• $11,601–$47,150 @ 12% = $4,266.00
• $47,151–$75,400 @ 22% = $6,214.78

Marginal rate: 22% (highest bracket reached) Effective federal rate: $11,640.78 / $90,000 = 12.9%

Marginal rate: The tax rate applied to your next dollar of income. If you are in the 22% bracket, earning one more dollar costs you 22 cents in federal tax. This rate is important for decisions like whether to contribute more to a pre-tax 401(k) (saves you at your marginal rate).

Effective rate: Your actual average rate across all income. Total tax paid divided by gross income. Always lower than your marginal rate in a progressive system.

Common misconception: Many Americans refuse bonuses or raises because they fear "moving into a higher tax bracket." This is a myth. Only the income above the bracket threshold is taxed at the higher rate. A raise always increases your net income, even if it pushes some income into a higher bracket.

Long-term capital gains (assets held more than one year) and qualified dividends are taxed at preferential rates — 0%, 15%, or 20% — rather than at ordinary income tax rates:

• 0%: Taxable income up to $47,025 (single) or $94,050 (MFJ) in 2024
• 15%: Income from $47,026 to $518,900 (single) or $94,051 to $583,750 (MFJ)
• 20%: Income above $518,900 (single) or $583,750 (MFJ)

An additional 3.8% Net Investment Income Tax (NIIT) applies to investment income for taxpayers with modified AGI over $200,000 (single) or $250,000 (MFJ).

You cannot "lower your bracket" in the traditional sense, but you can reduce your taxable income to pay less tax:

1. Traditional 401(k)/IRA contributions: Deducted from gross income before brackets apply. Maximum $23,000 for 401(k) in 2024.
2. HSA contributions: Triple tax-advantaged. Up to $4,150 single / $8,300 family in 2024.
3. Itemize deductions if they exceed the standard deduction: Mortgage interest, up to $10,000 state/local taxes (SALT), charitable contributions, some medical expenses.
4. Tax-loss harvesting: Selling losing investments to offset capital gains.
5. Qualified Business Income (QBI) deduction: Self-employed individuals may deduct up to 20% of qualified business income.