Social Security Benefits Tax Calculator
Calculate how much of your Social Security benefits are taxable based on combined income.
By Konstantin Iakovlev · Updated September 2026 · Source: 26 U.S.C. §86 — Social Security benefits: base amounts $25,000 / $32,000, adjusted base $34,000 / $44,000
Taxable Portion
85.0%
Taxable Amount
$17,000.00
Est. Tax on SS
$3,740.00
Taxation Details
| Other Income (AGI) | $50,000.00 |
| Social Security Benefits | $20,000.00 |
| 50% of SS Benefits | $10,000.00 |
| Combined Income | $60,000.00 |
| Taxable Portion of SS | 85.0% |
| Taxable SS Amount | $17,000.00 |
| Estimated Marginal Tax Rate | 22% |
| Estimated Federal Tax on SS | $3,740.00 |
Thresholds (Single)
| Combined income below $25,000 | 0% taxable |
| Combined income $25,000 - $34,000 | Up to 50% taxable |
| Combined income above $34,000 | Up to 85% taxable |
Use the Social Security Benefits Tax Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
How much of your Social Security check the IRS can tax is the question this tool settles. The answer matters for planning, since as much as 85% of your benefits may face federal income tax and shape what you owe for 2026.
The calculation starts from your combined income: your Adjusted Gross Income (AGI), plus tax-exempt interest, plus 50% of your Social Security benefits. Benefits only become taxable once that figure passes $25,000 for single filers or $32,000 for married couples filing jointly, and above $34,000 single or $44,000 joint up to 85% of them can be taxed. These amounts are written into the tax code and are not adjusted for inflation.
Tax-exempt interest is easy to leave out of MAGI, and skipping it understates how much of your benefit is actually taxable, so include it. State treatment is another wrinkle, since rules on taxing Social Security differ from state to state; the scope here is federal taxation only.
Example: Single Filer, $25,000 Social Security, $20,000 Other Income
- 1 Enter your annual Social Security benefits ($25,000) and your other income, your AGI without Social Security ($20,000). There is no separate field for tax-exempt interest, so add any to other income.
- 2 Combined income: $20,000 + 50% of $25,000 ($12,500) = $32,500. That is above the $25,000 base amount for a single filer but not above the $34,000 adjusted base amount.
- 3 Taxable benefits are the smaller of half the income over the base, ($32,500 − $25,000) × 50% = $3,750, or half the benefits, $12,500. So $3,750, 15% of the $25,000, is taxable: the 50% is a ceiling, not a flat rate.
- 4 This result helps you anticipate your tax obligations. You can choose to have federal income tax withheld from your Social Security benefits or make estimated tax payments throughout the year to avoid a large tax bill at year-end.
Source: 26 U.S.C. §86 — Social Security benefits: base amounts $25,000 / $32,000, adjusted base $34,000 / $44,000 · Last updated: September 2026
Frequently Asked Questions
How do I know if my Social Security benefits are taxable?
Can I avoid paying taxes on Social Security?
What is the maximum monthly Social Security payment at age 70 in 2026?
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