USA Tax Calculator 2026
Your Complete Federal & State Tax Estimate

For 2026, per IRS Revenue Procedure 2025-32 and the One Big Beautiful Bill Act (OBBBA), the seven federal brackets are: Single: 10% on income up to $12,400; 12% on $12,401–$50,400; 22% on $50,401–$105,700; 24% on $105,701–$201,775; 32% on $201,776–$256,225; 35% on $256,226–$640,600; 37% on income above $640,600. Married Filing Jointly: 10% up to $24,800; 12% up to $100,800; 22% up to $211,400; 24% up to $403,550; 32% up to $512,450; 35% up to $768,700; 37% above $768,700. These are marginal rates — only income within each bracket is taxed at that rate, not your entire income.

The 2026 standard deductions (IRS Rev. Proc. 2025-32, adjusted for inflation under Chained CPI) are: Single / Married Filing Separately: $16,100 (up from $15,750 in 2025). Married Filing Jointly / Qualifying Surviving Spouse: $32,200 (up from $31,500 in 2025). Head of Household: $24,150 (up from $23,625 in 2025). Additional standard deduction for age 65+ or blind: $1,650 (single/HoH) or $1,300 per qualifying person (married). The OBBBA permanently maintained the higher TCJA standard deduction amounts and added a further inflation adjustment for 2026.

Your marginal tax rate is the rate applied to your last (highest) dollar of taxable income — the rate of the highest bracket you reach. Your effective tax rate is the percentage of your total income actually paid in federal income tax, which is always lower because most income is taxed at lower rates in the brackets below. Example: A single filer with $80,000 taxable income has a 22% marginal rate, but an effective rate of roughly 13–14% because the first $12,400 is taxed at 10%, the next $38,000 at 12%, and only the remaining ~$29,600 at 22%. Most people dramatically overestimate their effective tax rate by confusing it with their marginal rate.

FICA (Federal Insurance Contributions Act) funds Social Security and Medicare. In 2026: Social Security: 6.2% on wages up to $184,500 (the 2026 wage base, up from $176,100 in 2025). Maximum SS tax: $11,439. Medicare: 1.45% on all wages — no cap. Additional Medicare Tax: 0.9% on wages exceeding $200,000 (single) or $250,000 (married jointly). Employers match the 6.2% SS and 1.45% Medicare (but not the additional 0.9%). Self-employed individuals pay the full 15.3% (both employee and employer portions), but can deduct half as an above-the-line adjustment.

The 2026 Child Tax Credit (CTC) is $2,200 per qualifying child under age 17 (up from $2,000 in 2024; the OBBBA increased this). The credit directly reduces your tax liability — not just your taxable income. Up to $1,700 per child may be refundable as the Additional Child Tax Credit (ACTC), meaning you can receive it as a refund even if you owe no income tax. The credit begins phasing out at $400,000 AGI (married filing jointly) and $200,000 for all other filing statuses. The phase-out reduces the credit by $50 for every $1,000 (or fraction thereof) above these thresholds.

You should choose whichever gives you the larger deduction. With the 2026 standard deduction at $16,100 (single) / $32,200 (married jointly), itemizing only makes sense if your qualifying deductions exceed these amounts. Common itemized deductions: mortgage interest (on up to $750,000 of debt), state and local taxes (SALT, capped at $10,000 per household — though OBBBA temporarily raised this cap to $40,000 for MFJ subject to income limits), charitable contributions, and qualifying medical expenses above 7.5% of AGI. Given the high standard deduction, only about 10–12% of taxpayers itemize in 2026. Our calculator shows both options and selects the better one automatically.

Long-term capital gains (assets held over 12 months) are taxed at preferential rates: 0%, 15%, or 20%, depending on your total income. For 2026 (approximate, adjusted for inflation from 2025): 0% rate: up to ~$49,350 (single) / ~$98,700 (married jointly). 15% rate: up to ~$546,250 (single) / ~$600,050 (married jointly). 20% rate: above those thresholds. Additionally, high-income earners pay the 3.8% Net Investment Income Tax (NIIT) on the lesser of net investment income or the excess of MAGI over $200,000 (single) / $250,000 (MFJ). Short-term capital gains (assets held 12 months or less) are taxed as ordinary income at your regular bracket rates.

Self-employed individuals (freelancers, consultants, sole proprietors, gig workers) must pay both the employee and employer portions of FICA: 12.4% Social Security (on net earnings up to $184,500) + 2.9% Medicare = 15.3% total self-employment (SE) tax. On $50,000 of self-employment income, you'd owe approximately $7,065 in SE tax. However, two deductions help: (1) You can deduct the employer-equivalent half (7.65%) of SE tax as an above-the-line adjustment, reducing AGI. (2) Your net SE income is further reduced by half the SE tax before calculating the actual SE tax liability. Quarterly estimated tax payments (Form 1040-ES) are required if you expect to owe $1,000 or more in federal taxes.

If you owe more than $1,000 in federal taxes after subtracting withholding and credits, the IRS may charge an underpayment penalty. The penalty is calculated using the current quarterly interest rate (tied to the federal funds rate). You can generally avoid the penalty by ensuring you've paid at least: (1) 90% of your current year's tax liability, or (2) 100% of last year's tax liability (110% if your prior-year AGI exceeded $150,000). If you're self-employed or have income not subject to withholding, make quarterly estimated payments by April 15, June 16, September 15, and January 15. Use our W-4 Guide tab to see if you're on track.

Yes — up to 85% of Social Security benefits may be subject to federal income tax, depending on your "combined income" (AGI + non-taxable interest + 50% of SS benefits). If combined income is below $25,000 (single) or $32,000 (MFJ), SS is not taxable. If between $25,000–$34,000 (single) or $32,000–$44,000 (MFJ), up to 50% is taxable. Above $34,000 (single) or $44,000 (MFJ), up to 85% is taxable. There is no income level at which 100% of SS benefits are taxable. Note: 13 states also tax Social Security benefits to some extent; 37 states fully exempt SS benefits. Our calculator uses 85% taxability as a conservative estimate when benefits are significant.

Key changes from 2025 to 2026 (per IRS Rev. Proc. 2025-32 and the One Big Beautiful Bill Act / OBBBA): (1) Bracket thresholds increased ~2.7% for inflation (Chained CPI method), with an extra 4% boost for the 10% and 12% brackets specifically. (2) Standard deductions increased: +$350 single (to $16,100), +$700 MFJ (to $32,200). (3) Child Tax Credit increased to $2,200 per child (from $2,000). (4) FICA wage base increased to $184,500 (from $176,100). (5) The OBBBA permanently extended the TCJA individual tax provisions that were set to expire after 2025, preventing rates from reverting to higher pre-TCJA levels (e.g., the top rate stays at 37% rather than reverting to 39.6%). (6) New senior deduction of up to $6,000 for those 65+ earning under $75K (single) / $150K (MFJ).

Adjusted Gross Income (AGI) is your total income minus "above-the-line" adjustments. It's the number on Line 11 of Form 1040 and is critically important because: (1) It determines eligibility for many deductions and credits (most phase out at certain AGI levels). (2) Your standard deduction is not AGI-based, but itemized deduction limitations often reference AGI (e.g., medical expenses must exceed 7.5% of AGI). (3) Many state taxes are based on federal AGI. (4) IRMAA surcharges for Medicare Part B/D are based on MAGI (Modified AGI, which is AGI plus certain additions back). Reducing AGI through 401(k), IRA, and HSA contributions is more valuable than post-AGI deductions because a lower AGI unlocks more credits and deductions.

For 2026, you generally must file if your gross income exceeds the following thresholds: Single under 65: $16,100 (same as standard deduction). Single 65+: $17,750. Married Filing Jointly, both under 65: $32,200. MFJ, one spouse 65+: $33,500. MFJ, both 65+: $34,800. Head of Household under 65: $24,150. Self-employed: $400 of net self-employment income. Even if you're below these thresholds, you should file if federal tax was withheld from your paycheck (to get a refund), if you're eligible for refundable credits like the EITC or ACTC, or if you received health insurance marketplace subsidies (Form 1095-A).

The Earned Income Tax Credit (EITC) is a refundable tax credit for low-to-moderate income workers. Maximum 2026 EITC amounts: $664 (no qualifying children); $4,427 (1 qualifying child); $7,316 (2 children); $8,231 (3 or more children). To qualify, you must have earned income, a valid SSN, meet investment income limits ($11,600 cap in 2026), and fall within income phase-out ranges. For single filers with 3+ children, the EITC phases out starting at ~$21,510 and ends at ~$57,310. For married filing jointly with 3+ children, phase-out begins at ~$28,610 and ends at ~$64,410. The credit is fully refundable — you can receive it even if you owe no federal income tax.

The redesigned W-4 (Form W-4, revised 2020+) has five steps: Step 1 (personal info), Step 2 (multiple jobs — critical if you or your spouse has multiple jobs), Step 3 (claim dependents and Child Tax Credit amounts), Step 4a (other non-wage income), Step 4b (extra deductions), Step 4c (additional dollar amount to withhold each pay period). To avoid under-withholding: (1) If your employer doesn't use the new W-4, request a new one. (2) Use the IRS Tax Withholding Estimator at irs.gov/W4App. (3) Enter a specific extra amount in Step 4c to cover taxes on self-employment income, investment income, or any other income not subject to withholding. (4) Update your W-4 whenever your life changes: marriage, divorce, new child, major raise, second job, or large investment gains.

This calculator uses official 2026 IRS federal tax brackets from Revenue Procedure 2025-32, standard deductions from the same source, and FICA rates from the Social Security Administration. It accurately calculates: federal income tax on ordinary income, FICA taxes, self-employment tax, long-term capital gains tax, state income tax (approximate), Child Tax Credit, and the standard vs. itemized deduction comparison. Limitations: (1) It uses approximate capital gains thresholds (exact 2026 figures may vary slightly); (2) EITC eligibility requires specific circumstances not fully captured; (3) State tax rates are approximate averages — local taxes (NYC, MD counties, PA local EIT) are not included; (4) AMT, kiddie tax, and complex situations are not modeled. For official tax advice, consult a CPA or enrolled agent, or use official IRS tools at irs.gov.