US Paycheck Tax Calculator 2026

How to Use This Calculator

1. Enter your income — choose salary, hourly, or self-employed. Hourly automatically computes annual pay based on hours per week.
2. Set your filing status and state — these are the two biggest drivers of your tax bill outside of income.
3. Fill in your pre-tax benefits — 401k, HSA, health insurance, FSA, and commuter benefits all reduce both your federal taxable income and, in most cases, your FICA base. This is the single biggest opportunity most employees overlook.
4. Choose Standard vs Itemized deduction — the 2026 standard deduction is $16,100 (single) / $32,200 (MFJ). You only benefit from itemizing if your mortgage interest + charitable gifts + SALT + medical expenses exceed that amount.
5. Add your credits — children under 17 qualify for the $2,000 Child Tax Credit each. If your income is below the EITC threshold, the calculator will flag it automatically.
6. Check the analysis panels — the bracket visualizer, Roth vs Traditional comparison, 30-year wealth projection, and annual paycheck schedule are all updated live with your numbers.
7. Export — PDF gives you a one-page summary; Excel gives you the complete annual paycheck schedule plus comparison sheet.

Understanding Federal Income Tax — Progressive Brackets

The single biggest misconception in US taxation is that being in "the 22% bracket" means you pay 22% of your entire income. That is wrong. The US uses a progressive bracket system: you pay each bracket rate only on the dollars that fall within that bracket range, after your standard deduction is subtracted.

The 2026 bracket thresholds are approximately 4% higher than 2025 (IRS Rev. Proc. 2025-32), and the standard deduction rose from $15,000 to $16,100 for single filers — a saving of roughly $242 in federal tax for most single filers.

FICA Taxes — Social Security and Medicare

Social Security is withheld at 6.2% on all wages up to $184,500 (the 2026 wage base). Once your cumulative W-2 earnings in a calendar year hit $184,500, SS withholding stops for the rest of the year — you'll see this reflected in the paycheck schedule panel.

Medicare is withheld at 1.45% on all wages with no cap. If your wages exceed $200,000 (single) or $250,000 (MFJ), an additional 0.9% Medicare tax applies.

Pre-Tax Benefits — The Most Powerful Take-Home Boosters

Traditional 401(k)

Every dollar contributed reduces your federal (and most states') taxable income. If you're in the 22% bracket, a $100 contribution costs you only $78 in reduced take-home — the other $22 that would have gone to the IRS goes to your retirement account instead. The 2026 contribution limit is $23,500 (under 50), $31,000 (age 50+), and $34,750 for ages 60–63 (SECURE 2.0 super catch-up).

HSA — The Triple Tax Advantage

An HSA is the only account in the US tax code that is triple tax-advantaged: contributions reduce taxable income AND FICA, growth is tax-free, and qualified withdrawals are tax-free. The 2026 contribution limit is $4,300 (self-only) or $8,550 (family), with an extra $1,000 catch-up at age 55+.

Roth 401(k) vs Traditional 401(k)

With Roth, contributions come from after-tax dollars — no reduction in your taxable income today, but qualified withdrawals in retirement are completely tax-free. Traditional wins if your retirement tax rate is lower than your current rate; Roth wins if your retirement rate will be equal or higher. The 30-Year Projection panel models both scenarios with your actual numbers.

2026 OBBBA New Deductions

The One Big Beautiful Bill Act created two new "above-the-line" deductions for 2026:

• Qualifying tip income — employees in traditionally tipped occupations can deduct qualifying tips from federal taxable income, up to $25,000. This does not reduce FICA; it still applies to the full tip amount.
• Qualifying overtime pay — overtime pay (hours over 40/week for non-exempt employees) can be deducted from federal taxable income, with no stated dollar cap. Same FICA treatment as tips.

Child Tax Credit (CTC) and EITC

The Child Tax Credit is $2,000 per qualifying child under age 17. It directly reduces your federal tax bill (not just your taxable income). It phases out at $200,000 AGI (single) or $400,000 (MFJ). Up to $1,700 per child is refundable as the Additional Child Tax Credit.

The Earned Income Tax Credit (EITC) is a refundable credit for lower-to-middle income workers — worth up to $8,231 for families with 3+ children in 2026. It phases out as income rises. Unlike the CTC, it is not deducted from paycheck withholding but applied as a refund when you file. The calculator flags it automatically and shows the estimated amount.

Self-Employment Taxes

Self-employed individuals pay the combined employee + employer share of FICA (15.3% up to the SS wage base, 2.9% above). The offsetting benefits: you can deduct 50% of SE tax from AGI, contribute to a SEP-IRA or Solo 401k (up to $70,000 annually), and take a 20% Qualified Business Income (QBI) deduction on net business income (subject to income limitations).

Understanding Your Paycheck Schedule

The paycheck schedule panel shows every pay period for the year. The most important feature: Social Security withholding stops mid-year for high earners (anyone earning over $184,500). The months after the SS wage base is hit show $0 SS withholding — meaning those later paychecks are larger. This is completely legal and expected; it's simply how the SS wage base cap works.

This calculator provides estimates for general informational purposes and is not tax advice. Tax situations vary — consult a licensed CPA or tax professional for your specific circumstances. Tax rates, brackets, and limits are based on IRS Rev. Proc. 2025-32 and OBBBA provisions for tax year 2026. Last updated: June 2026.