What This Calculator Does
Understanding how much of your income goes to federal taxes is the foundation of financial planning. This calculator estimates your federal income tax using 2026 tax brackets and applies the standard deduction automatically. It also calculates FICA taxes (Social Security and Medicare) and shows your effective and marginal tax rates alongside a full bracket breakdown so you can see exactly how your income is taxed at each level.
The 2026 tax year brought notable changes. The One Big Beautiful Bill Act (OBBBA), signed into law in July 2025, made the TCJA tax rates permanent and added an extra inflation adjustment for the bottom two brackets. The standard deduction increased to $16,100 for single filers, $24,150 for head of household, and $32,200 for married filing jointly. The Social Security wage base rose to $184,500. These figures matter because they directly determine how much of your income is taxable.
If you want to see your full take-home pay including state taxes and benefit deductions, use our Take-Home Paycheck Calculator. For retirement-specific tax savings, our 401(k) Calculator shows how pre-tax contributions reduce your taxable income while building your retirement balance.
Inputs Required
- Gross Annual Income: Your total income before any deductions or taxes
- Filing Status: Single, Married Filing Jointly, or Head of Household
- Additional Deductions: Pre-tax items that reduce taxable income, such as 401(k) contributions or HSA contributions
Outputs Provided
- Federal Income Tax: Your estimated federal tax liability
- Effective Tax Rate: Your average rate across all income (total tax divided by gross income)
- Marginal Tax Rate: The rate applied to your last dollar of taxable income
- FICA Taxes: Social Security (6.2%) and Medicare (1.45%) combined
- After-Tax Income: Your take-home after federal and FICA taxes
- Bracket Breakdown: Line by line view of how each bracket is applied
How the Calculation Works
The US federal income tax system is progressive and marginal. Different portions of your income are taxed at different rates, not your entire income at your top rate. The standard deduction is subtracted from gross income first to arrive at taxable income.
Taxable Income = Gross Income - Standard Deduction - Other Deductions
Tax = Sum of (each bracket rate x income in that bracket)
For 2026, the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household. Seniors aged 65 and older can claim an additional $2,050 (single) or $1,650 per spouse (married), plus a new $6,000 senior deduction introduced by the OBBBA that phases out above $75,000 in income for singles and $150,000 for joint filers. FICA taxes apply separately to gross income, not taxable income: Social Security at 6.2% on income up to $184,500, and Medicare at 1.45% with no cap.
2026 Single Filer Brackets:
10%: $0 to $12,400
12%: $12,401 to $50,400
22%: $50,401 to $105,700
24%: $105,701 to $201,775
32%: $201,776 to $256,225
35%: $256,226 to $640,600
37%: $640,601+
The OBBBA applied a 4% inflation adjustment to the bottom two brackets (10% and 12%) versus a 2.3% adjustment to the upper brackets, providing slightly more benefit to low and middle-income earners compared to prior law.
How to Use the Calculator
- Enter your total gross annual income from all sources (W-2 wages, self-employment income, etc.)
- Select your filing status: Single, Married Filing Jointly, or Head of Household
- Add any pre-tax deductions that reduce your taxable income. For 2026, you can contribute up to $24,500 to a 401(k), $7,500 to a traditional IRA, and $4,400 (self-only) or $8,750 (family) to an HSA
- Review your estimated federal tax, effective rate, and after-tax income
- Check the bracket breakdown to see exactly which rates apply to your income
Example Calculations
Example 1: Single Filer Earning $75,000
A single filer with $75,000 gross income and no additional deductions in 2026:
- Standard deduction: $16,100
- Taxable income: $58,900
- Tax at 10%: $1,240 (on first $12,400)
- Tax at 12%: $4,560 (on $12,401 to $50,400)
- Tax at 22%: $1,870 (on $50,401 to $58,900)
- Total federal tax: approximately $7,670
- Effective rate: 10.2%, Marginal rate: 22%
- FICA: $5,738 (6.2% SS + 1.45% Medicare on $75,000)
- After-tax income: approximately $61,592
Example 2: Married Couple Earning $180,000 Jointly
A married couple filing jointly with $180,000 combined gross income, contributing $12,000 to 401(k) plans in 2026:
- Standard deduction: $32,200
- 401(k) deductions: $12,000
- Taxable income: $135,800
- Tax at 10%: $2,480 (on first $24,800)
- Tax at 12%: $9,120 (on $24,801 to $100,800)
- Tax at 22%: $7,700 (on $100,801 to $135,800)
- Total federal tax: approximately $19,300
- Effective rate: 10.7%, Marginal rate: 22%
- FICA: $13,770 (6.2% SS on $180,000 + 1.45% Medicare)
- After-tax income: approximately $146,930
Without the $12,000 in 401(k) contributions, their taxable income would be $147,800 and their federal tax would be approximately $21,940. The 401(k) contributions save them about $2,640 in federal taxes at their 22% marginal rate.
Real World Scenarios
Evaluating a Raise That Pushes You into a Higher Bracket
Carlos earns $100,000 as a single filer and is offered a raise to $110,000. He worries that the extra $10,000 will push him deeper into the 24% bracket and "cost him money." Running the numbers, his taxable income goes from $83,900 to $93,900. The additional $10,000 is taxed at 24%, generating $2,400 in extra federal tax. But his after-tax income still increases by $7,600. The progressive bracket system means raises always increase your after-tax income. Only the dollars within the new bracket are taxed at the higher rate.
Pre-Tax Contribution Planning for a Family
The Nguyen family earns $210,000 jointly and is deciding whether to max out their 401(k) contributions. In 2026, each spouse can contribute $24,500, for a combined $49,000. At their 24% marginal rate, this saves them $11,760 in federal taxes. They also contribute $8,750 to a family HSA, saving another $2,100. Total tax savings: $13,860. Without these contributions, their taxable income would be $177,800. With them, it drops to $120,050. The calculator shows the exact bracket-by-bracket impact so they can see how each dollar of pre-tax contributions reduces their tax bill.
Comparing Filing Statuses Before Marriage
Alex and Jordan are considering getting married in 2026. Alex earns $95,000 and Jordan earns $55,000. Filing as two single filers, their combined federal tax is approximately $17,500. Filing jointly, their combined taxable income is $150,000 minus the $32,200 standard deduction, and their federal tax is approximately $16,700. They save about $800 by filing jointly. This is a marriage tax bonus. But if both earned $125,000, filing jointly would push more of their income into the 24% bracket, creating a marriage penalty of roughly $1,200. You can model this precisely using our Marriage Tax Calculator.
Common Mistakes to Avoid
- Confusing marginal and effective rates: Your marginal rate applies only to the last dollars earned, not your whole income. Your effective rate is the true percentage of gross income paid in taxes. Someone in the 22% marginal bracket may have an effective rate of only 10% to 12%
- Forgetting FICA taxes: Social Security and Medicare add 7.65% on top of income tax for most employees. Self-employed individuals pay the full 15.3% as self-employment tax
- Ignoring state income taxes: This calculator covers federal tax only. Most states also levy income tax ranging from 0% (Florida, Texas, Washington, Tennessee, Nevada) to over 13% (California for high earners)
- Not adjusting withholding: If your actual tax liability differs significantly from what your employer withholds, you may owe a large sum or receive a large refund. Update your W-4 to align withholding with reality
- Missing the Additional Medicare Tax: High earners pay an extra 0.9% Medicare surtax on wages above $200,000 (single) or $250,000 (married filing jointly). This calculator does not include this surtax
Limitations of This Calculator
This calculator estimates federal income tax and FICA taxes only. It does not account for state or local income taxes, which can add up to 13% or more depending on where you live. It does not include the Additional Medicare Tax of 0.9% for high earners, the Net Investment Income Tax of 3.8% for investment income, or self-employment tax for independent contractors. It also does not factor in tax credits like the Child Tax Credit, Earned Income Tax Credit, or education credits, which can significantly reduce your actual tax liability. For a complete tax estimate, consult a licensed tax professional or use IRS-approved tax software.
Authoritative Research & Resources
- IRS - Federal Income Tax Rates and Brackets - The official IRS page with current and prior-year tax brackets, standard deductions, and filing status information. This is the primary source for all federal income tax rate data used in this calculator.
- IRS - Tax Year 2026 Inflation Adjustments - The official IRS announcement of 2026 tax year inflation adjustments, including standard deduction increases, bracket thresholds, and OBBBA amendments. Published as Revenue Procedure 2025-32.
- Social Security Administration - Contribution and Benefit Base - The official SSA page showing the 2026 Social Security wage base of $184,500 and the OASDI tax rate of 6.2%. Updated annually based on changes in the national average wage index.