How much of my Social Security benefits are taxable in 2025?
Up to 85% of your Social Security benefits can be taxable, depending on your "combined income." Here's exactly how it works:
What is combined income?
Combined income = Adjusted Gross Income (AGI) + Non-taxable interest + 50% of your Social Security benefits
This formula is also called "provisional income" and the IRS uses it — not your total Social Security amount — to determine taxability.
The three taxation tiers (2025, unchanged since 1984/1993):
| Combined Income | Single Filers | Married Filing Jointly |
|---|---|---|
| Below threshold | No tax | No tax |
| Lower threshold | Up to 50% taxable | Up to 50% taxable |
| Upper threshold | Up to 85% taxable | Up to 85% taxable |
- Single/MFS: 50% taxable if combined income is $25,000–$34,000. Up to 85% taxable above $34,000.
- Married filing jointly: 50% taxable if combined income is $32,000–$44,000. Up to 85% taxable above $44,000.
A practical example:
Married couple with $30,000 AGI, $2,000 tax-exempt interest, and $24,000 in Social Security benefits.
Combined income = $30,000 + $2,000 + ($24,000 × 50%) = $44,000.
That's right at the upper threshold — so some portion is taxable at the higher rate.
What's NOT taxed: The threshold numbers have never been adjusted for inflation since they were set in 1984 and 1993. A Social Security recipient in 1983 would rarely have crossed these thresholds — but today, the majority of recipients owe some tax on their benefits.
Important state note: Most states do not tax Social Security benefits. States that still tax them include Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont (though many have income-based exemptions). Check your state rules separately.
Sources
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