Is your Social Security benefit taxable?
Is Social Security taxable? Up to 85 percent of benefits can be, depending on your other income and filing status. See the $25,000 and $32,000 base amounts.
Prepared by Prem Tax and Accounting Corp. Last checked against official sources on October 28, 2026.
Sometimes. Federal tax applies to Social Security benefits only when half your benefits plus your other income, including tax-exempt interest, goes above a base amount for your filing status. Even then, no more than 85 percent of your benefits are taxable. Many people with only a modest benefit owe nothing on it.
- For tax year 2025, the base amount is $25,000 if you are single, head of household or a qualifying surviving spouse, and $32,000 if you are married filing jointly.
- Up to 50 percent of benefits can be taxable above the base amount, and up to 85 percent above $34,000 ($44,000 if married filing jointly).
- The maximum taxable share is 85 percent of your benefits, never the whole amount.
- Married filing separately and living with your spouse at any time in the year means a base amount of $0.
- Your Form SSA-1099 arrives by early February and shows the benefits for the prior calendar year.
How the test works
The IRS compares two numbers. The first is one-half of your net benefits, which is box 5 of Form SSA-1099. The second is your base amount. You add the half of benefits to all your other income, including tax-exempt interest. If the total is no more than the base amount, none of your benefits are taxable.
Find your benefits
Look at box 5 of Form SSA-1099 (or Form RRB-1099 for railroad retirement benefits).
Add your other income
Include wages, pensions, interest, dividends, gains and tax-exempt interest, then add half of your benefits.
Compare with your base amount
Use $25,000 or $32,000, or $0 if you are married filing separately and lived with your spouse during the year.
Use the IRS worksheet
Publication 915 and the Form 1040 instructions give the worksheet that figures the taxable part.
The tiers in a table
| Filing status (tax year 2025) | Where taxable benefits begin | Where the 85 percent tier begins |
|---|---|---|
| Single, head of household, qualifying surviving spouse | $25,000 | $34,000 |
| Married filing jointly | $32,000 | $44,000 |
| Married filing separately, lived with spouse | $0 | Applies from the start |
A short example
This example is invented. Ana is single and receives $20,000 in benefits. She also has $18,000 of pension and interest income. Half her benefits is $10,000, so her combined income is $28,000. That is above $25,000, so part of her benefit is taxable, but far less than all of it. Without the pension, the total would be $10,000 and none would be taxable.
Tax withheld from benefits
You can ask the Social Security Administration to withhold federal tax from your benefits by filing Form W-4V. Otherwise you may need to make estimated payments. Check the Form W-4V instructions for the allowed rates.
Common questions
Is all of my Social Security taxable?
No. At most 85 percent of your benefits can be taxable, and many people owe tax on none of it.
Do I pay tax on benefits if Social Security is my only income?
Usually not. If half of your benefits plus other income is no more than the base amount, none is taxable.
Does tax-exempt interest count?
Yes. The IRS includes it when comparing your income with the base amount.
Does Illinois tax Social Security benefits?
This page covers federal tax only. Check the Illinois Department of Revenue for state rules.
Official sources
- IRS: Topic no. 423, Social Security and equivalent railroad retirement benefits
- IRS: Publication 915, Social Security and Equivalent Railroad Retirement Benefits
- IRS: Form W-4V
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