Federal income tax brackets work on a progressive, layered system: each portion of your income is taxed at its own rate, not your entire income at a single rate. The U.S. currently has seven tax rates ranging from 10% to 37%, and understanding how they stack means you’ll never have to worry that a raise could somehow cost you money.
The Marginal System, Step by Step
The most important thing to understand is that moving into a higher tax bracket does not mean all your income gets taxed at that higher rate. Only the dollars inside each bracket are taxed at that bracket’s rate. This is what “marginal” means: each rate applies at the margin, to the next slice of income.
Think of it like filling buckets. Your first dollars of taxable income fill the 10% bucket. Once that bucket is full, the next dollars spill into the 12% bucket, then the 22% bucket, and so on. The money already in the lower buckets stays taxed at the lower rates no matter how much you earn.
Here’s a concrete example. Say you’re a single filer with $60,000 in taxable income, using the 2025 brackets:
- First $11,925 is taxed at 10% = $1,192.50
- Next $36,550 (from $11,926 to $48,475) is taxed at 12% = $4,386
- Remaining $11,525 (from $48,476 to $60,000) is taxed at 22% = $2,535.50
Total federal tax: $8,114. That’s an effective tax rate of about 13.5%, even though the highest bracket your income touched was 22%. The gap between your marginal rate (22%) and your effective rate (13.5%) exists because most of your income was taxed at lower rates along the way.
Marginal Rate vs. Effective Rate
Your marginal tax rate is the rate on the last dollar you earned. It tells you how much of each additional dollar of income goes to taxes. If you’re considering picking up freelance work or selling an investment, your marginal rate helps you estimate the tax hit on that extra income.
Your effective tax rate is your total tax divided by your total income. It reflects the blended rate you actually paid across all brackets. For most people, the effective rate is significantly lower than the marginal rate. Someone in the “22% bracket” might really be paying closer to 12% or 14% overall once the math plays out across all the layers.
2025 Tax Brackets by Filing Status
The dollar ranges for each bracket shift depending on how you file. Married couples filing jointly get wider brackets, meaning more income is taxed at each lower rate before the next one kicks in. Head of household filers (generally single parents who pay more than half the cost of maintaining a home for a qualifying dependent) get brackets that fall between single and joint.
For the 2025 tax year, the seven rates and their taxable income ranges look like this:
Single Filers
- 10%: $0 to $11,925
- 12%: $11,926 to $48,475
- 22%: $48,476 to $103,350
- 24%: $103,351 to $197,300
- 32%: $197,301 to $250,525
- 35%: $250,526 to $626,350
- 37%: $626,351 and above
Married Filing Jointly
- 10%: $0 to $23,850
- 12%: $23,851 to $96,950
- 22%: $96,951 to $206,700
- 24%: $206,701 to $394,600
- 32%: $394,601 to $501,050
- 35%: $501,051 to $751,600
- 37%: $751,601 and above
Head of Household
- 10%: $0 to $17,000
- 12%: $17,001 to $64,850
- 22%: $64,851 to $103,350
- 24%: $103,351 to $197,300
- 32%: $197,301 to $250,500
- 35%: $250,501 to $626,350
- 37%: $626,351 and above
Notice that the 10% bracket for married couples filing jointly ($23,850) is exactly double the single filer bracket ($11,925). This pattern holds through most of the lower brackets, which is why two people earning similar incomes often see a tax benefit from filing jointly.
How the Standard Deduction Fits In
The brackets apply to your taxable income, not your total earnings. Before your income hits the bracket system, you subtract either the standard deduction or your itemized deductions, whichever is larger. Most people take the standard deduction.
For the 2026 tax year, the standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly. That means a single person earning $70,000 in gross income would subtract $16,100 first, leaving $53,900 in taxable income to run through the brackets. The standard deduction effectively makes your first chunk of earnings tax-free.
This is why two people with the same salary can owe different amounts. If one takes the standard deduction and the other itemizes with large mortgage interest and charitable contributions, their taxable income differs, and the brackets apply to different totals.
Why a Raise Never Costs You Money
One of the most persistent tax misunderstandings is the idea that earning a bit more could push you into a higher bracket and leave you worse off. That cannot happen with a progressive system. If a $5,000 raise pushes you from the 22% bracket into the 24% bracket, only the portion above the 22% threshold gets taxed at 24%. The rest of your income stays exactly where it was. You always take home more money after a raise, even after taxes.
Where people sometimes feel the pinch is with income-based phase-outs. Certain tax credits and deductions gradually shrink as your income rises, which can make the effective bite of additional income feel steeper than the bracket rate alone. But the bracket system itself never punishes you for earning more.
How Brackets Are Adjusted Each Year
The IRS adjusts bracket thresholds annually for inflation. The rates (10%, 12%, 22%, etc.) stay the same unless Congress changes the law, but the dollar ranges widen slightly each year so that inflation alone doesn’t push you into a higher bracket. This adjustment is sometimes called indexing. It’s the reason the exact numbers shift from one tax year to the next, and why you’ll see updated bracket tables published each fall for the coming year.
What Could Change After 2025
The current seven rates were set by the Tax Cuts and Jobs Act (TCJA) of 2017. Many of its provisions were scheduled to expire after 2025, which would have raised several rates: the 12% bracket would have jumped to 15%, the 22% to 25%, the 24% to 28%, and the top rate from 37% to 39.6%. The standard deduction would also have shrunk roughly in half, and personal exemptions (a per-person deduction that the TCJA eliminated) would have returned.
Congress has been working to extend the TCJA rates. For the 2026 tax year, the IRS has already published inflation-adjusted figures that assume the current rate structure continues, including the $16,100 and $32,200 standard deduction amounts mentioned above. If you’re planning ahead, keep an eye on whether the extension is finalized, because the difference between the current rates and the pre-TCJA rates can amount to thousands of dollars for a typical household.