Last updated: May 2026
Quick Answer
The US uses a progressive tax system with 7 brackets (10% to 37%). Your effective rate is always lower than your marginal rate because only the income within each bracket pays that rate — not all your income. Moving into a higher bracket never means you take home less money.
Key Takeaways
- ✓ Progressive system: Higher income is taxed at higher rates, but only the portion above each threshold.
- ✓ Marginal ≠ Effective: A $120k earner in the 22% bracket has an effective rate of roughly 16%, not 22%.
- ✓ Standard deduction first: Subtract the standard deduction (currently $15,000 single / $30,000 married) from gross income before using this calculator.
- ✓ Federal only: State income taxes, FICA (7.65%), and local taxes are not included in these estimates.
How to Use This Calculator (With Example)
Enter your taxable income — not your gross salary. To find taxable income, subtract the standard deduction ($15,000 if single, $30,000 if married filing jointly) from your gross wages. Then select your filing status.
Scenario: Sarah, Single Filer, $95,000 Gross Salary
- Gross Salary: $95,000
- Standard Deduction: $15,000 (single)
- Taxable Income: $95,000 − $15,000 = $80,000
- Filing Status: Single
The Results
10% on $0–$11,925: $1,193
12% on $11,925–$48,475: $4,386
22% on $48,475–$80,000: $6,936
Total Federal Tax: $12,515
Effective Rate: 15.6% (not 22%)
Marginal Rate: 22% (rate on her last dollar)
Sarah keeps $67,485 after federal tax — 84.4% of her taxable income.
How US Federal Tax Brackets Work
The US tax system is progressive — meaning different portions of your income are taxed at different rates. When people say "I'm in the 22% bracket," they don't mean 22% of all their income goes to taxes. They mean only the income above the 22% threshold ($48,475 for single filers in 2025) is taxed at that rate.
Think of it like filling up buckets. Each bracket is a bucket with a maximum capacity. You fill the 10% bucket first, then the 12% bucket, then 22%, and so on. You only pay the higher rate on the income that actually sits in that bucket.
Marginal Rate vs. Effective Rate — The Critical Distinction
This is the most misunderstood concept in personal tax planning.
Your marginal rate is the rate applied to your last dollar earned — also called your "tax bracket." A $90k single filer is in the 22% bracket, but they don't owe 22% of $90k.
Your effective rate is your true average tax burden: total tax ÷ total taxable income. It's always significantly lower than the marginal rate. For most middle-income earners, the effective federal rate is 12–18%, even if they're in the 22–24% bracket.
Standard Deductions (What to Subtract First)
Before applying brackets, the IRS allows you to subtract a standard deduction from your gross income:
- Single / Married Filing Separately: $15,000
- Married Filing Jointly / Qualifying Surviving Spouse: $30,000
- Head of Household: $22,500
If you have significant mortgage interest, charitable donations, or medical expenses, itemizing deductions (Schedule A) may produce a larger deduction than the standard amount. Use whichever is larger.
Tax Planning Strategies to Lower Your Tax Bill
Understanding brackets enables powerful income planning decisions:
- Maximize 401(k) contributions: Annual limit is $23,500 (plus $7,500 catch-up if 50+). Every dollar reduces your taxable income dollar-for-dollar at your marginal rate.
- Traditional IRA contributions: Up to $7,000/year ($8,000 if 50+) may be deductible, subject to income limits.
- HSA contributions: Health Savings Account contributions are triple-tax-advantaged. Current limits: $4,300 (individual) / $8,550 (family).
- Bracket filling with Roth conversions: In low-income years (career break, early retirement), convert traditional IRA funds to Roth up to the top of a low bracket. Pay tax now at 12%, avoid paying at 22%+ later.
- Capital gains timing: If your taxable income falls below the 0% long-term capital gains threshold (~$48,350 for single filers), qualified dividends and long-term gains are tax-free — a powerful planning opportunity.
- Business structure: Self-employed individuals can reduce taxable income through business deductions, SEP-IRA contributions (up to 25% of net self-employment income), and the 20% QBI deduction.
What This Calculator Does Not Include
This calculator estimates federal income tax only. Your actual total tax burden includes:
- FICA taxes: 6.2% Social Security (up to the annual wage base) + 1.45% Medicare = 7.65% total for employees. Self-employed pay 15.3%.
- State income taxes: Range from 0% (TX, FL, NV, WA, WY, SD, AK) to 13.3% (California).
- Net Investment Income Tax (NIIT): 3.8% additional tax on investment income for high earners.
- Alternative Minimum Tax (AMT): A parallel tax system that can affect high earners with significant deductions.
- Tax credits: Child Tax Credit, Earned Income Credit, and others reduce your actual tax bill and are not reflected here.
Frequently Asked Questions
What is a marginal tax rate?
Your marginal tax rate is the rate applied to your last (highest) dollar of income. Because the US uses a progressive system, only the income within each bracket pays that bracket's rate — not all of your income.
What is an effective tax rate?
Your effective tax rate is the average rate you actually pay — total federal tax divided by total taxable income. It is always lower than your marginal rate because lower income tiers are taxed at lower rates.
Does moving into a higher bracket mean I pay more on ALL my income?
No — this is one of the most common tax myths. Moving into a higher bracket only means that income above the threshold is taxed at the new rate. Your income below the threshold continues to be taxed at the lower rates. You will never take home less money by earning more.
What is the standard deduction?
The standard deduction reduces your gross income before brackets are applied. For 2025 it is $15,000 (single) or $30,000 (married filing jointly). Enter your income AFTER the standard deduction for the most accurate estimate.
Does this include FICA (Social Security and Medicare)?
No. This calculator estimates federal income tax only. FICA taxes add an additional 7.65% on wages up to $176,100 (Social Security portion), plus 1.45% on all wages (Medicare). Self-employed individuals pay the full 15.3% FICA rate.
What is the difference between tax deductions and tax credits?
A deduction reduces your taxable income. A $1,000 deduction saves you $220 if you're in the 22% bracket. A credit directly reduces your tax bill dollar-for-dollar — a $1,000 credit saves you exactly $1,000 regardless of bracket.