Last fact-check: July 27, 2026 · Primary sources: Internal Revenue Service and Social Security Administration · General information, not tax advice
Quick answer
Social Security retirement, survivor, and disability benefits can be partly taxable at the federal level when half of the benefits plus other income exceeds the IRS base amount. For the 2025 federal return filed in 2026, the base amounts are $25,000 for most single filers and $32,000 for married couples filing jointly. “Up to 85% taxable” means up to 85% of the benefit can be included in taxable income; it is not an 85% tax rate.
Key takeaways
- SSI payments are not taxable federal Social Security benefits.
- Tax-exempt interest can count in the screening calculation.
- State taxation is separate and must be checked with the taxpayer’s state revenue agency.
Tax-year note: The current IRS Publication 915 covers benefits paid in 2025 and returns generally filed in 2026. As of July 27, 2026, the final IRS publication for benefits paid during 2026 is not yet available. Use this page for planning and verify the 2026 form instructions before filing in 2027.
Federal Social Security tax thresholds
| Filing status | Base amount | Upper amount for possible 85% inclusion |
|---|---|---|
| Single, head of household, or qualifying surviving spouse | $25,000 | $34,000 |
| Married filing jointly | $32,000 | $44,000 |
| Married filing separately and lived apart all year | $25,000 | Use Publication 915 worksheet |
| Married filing separately and lived with spouse during the year | $0 | Up to 85% may be taxable |
The base amounts and maximum-taxable-part rules are in IRS Publication 915 (2025). The calculation is more detailed than comparing adjusted gross income alone.
Quick screen: could any benefits be taxable?
IRS Topic 423 says benefits generally are not taxable unless modified adjusted gross income plus one-half of benefits exceeds the filing-status base amount. Publication 915’s quick worksheet adds:
- one-half of net Social Security and equivalent Tier 1 railroad benefits;
- other taxable income, excluding the benefits; and
- tax-exempt interest.
If the total is at or below the applicable base amount, none of the benefits are taxable under the quick screen. If it is above the base amount, use the full IRS worksheet; do not simply multiply benefits by 50% or 85%.
What “up to 50%” and “up to 85%” mean
Publication 915 says generally up to 50% of benefits may be taxable. Up to 85% may be taxable when half of benefits plus other income is more than $34,000, or $44,000 for married filing jointly, or when married filing separately after living with a spouse during the year.
The taxable portion is added to taxable income and then taxed at the taxpayer’s ordinary federal income-tax rate. The IRS worksheet can produce less than the maximum inclusion percentage.
Which payments are covered?
Publication 915 covers Social Security retirement, survivor, and disability benefits and the Social Security-equivalent portion of Tier 1 railroad retirement benefits. It explicitly states that Supplemental Security Income (SSI) payments are not taxable.
Forms, withholding, and lump-sum benefits
- Use Form SSA-1099 or SSA-1042S to identify benefits reported for the year.
- Use the worksheet in Publication 915 or the Form 1040 instructions to calculate the taxable part.
- A prior-year lump-sum benefit may qualify for a special election described in Publication 915.
- SSA allows voluntary federal tax withholding from Social Security benefits through its withholding request process.
State income tax is a separate question
Federal treatment does not determine state treatment. Rules can change and may depend on age or income, so check the official revenue or taxation agency for the state where the return is filed. This page does not maintain a state-by-state list without source-by-source verification.
Related guides
- Average and maximum Social Security benefits in 2026
- 2026 Social Security COLA
- Social Security 2026 guide
Official sources
- IRS — Topic No. 423, Social Security benefits
- IRS — Publication 915 (2025)
- SSA — Get tax form 1099/1042S
- SSA — Request to withhold taxes
Editorial status: This guide has been checked against the cited official sources. Independent subject-matter review has not been completed. Federal rules were checked against the linked IRS and SSA sources on July 27, 2026. A qualified tax professional or the IRS should address an individual return. The Guru Gazette is independent and is not affiliated with the IRS, SSA, or another government agency.
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