Will My Social Security Be Taxed?

The IRS "provisional income" worksheet in 10 seconds: 0%, 50%, or 85% of your benefits taxable, and exactly which dollars are tipping you into each band.

Filing status

Annual Social Security benefits (all recipients, $)

Other taxable income (pensions, wages, 1099s, interest, dividends, capital gains, $)

Tax-exempt interest (muni bonds, HSA earnings, $)

Provisional income = everything above with half your SS benefits added back in, that half-SS add is the whole trick of the worksheet.

—provisional income

—of benefits taxable

—SS dollars taxable

—room until the next band

—your tax bracket on extra income

How the math works

Provisional = other taxable + tax-exempt interest + 0.5 × SS benefits. IRS bands (unchanged since 1984, never indexed, that's the trap):

Single: under $25,000 → 0% taxable. $25,000–$34,000 → 50% band. Over $34,000 → 85% band. Married: $32,000 / $44,000.
50% band: taxable = min(0.5 × (provisional − base), 0.85 × SS).
85% band: taxable = min(0.85 × SS, 0.5 × (provisional − upper) + min(4500, 0.5 × (upper − base))) (married: 6,000 and $44,000/$32,000).
The 85% cap is 0.85 × benefits, the top 15% of SS is permanently federal-tax-exempt for everyone.
Cliff effect: in the 50% band, $1 extra provisional income adds $0.50 taxable SS on top of its own tax, your true marginal rate on raises/RMDs while in-band = your bracket + 25% (in the 85% band, + 42.5%). That's the "Social Security tax bomb" retirees hit.
State taxes: ~10 states tax SS in some form as of 2026 (CO, CT, KS, MO, MN, MT, NE, ND, NM, UT+VT variants), most now exempt large slices; check your state line.

Federal worksheet for typical filers (Form 1040 SSA worksheet logic). Not tax advice: 85% band interacts with IRMAA (Medicare premium surcharge), QCD transfers, and Roth conversions, model big moves with a tax pro.

Frequently asked

At what income does Social Security become taxed?

Provisional income over $25,000 (single) / $32,000 (joint), and provisional income includes half your benefits plus tax-exempt interest, not just salary. 50+ states' fair-tax fights center on these never-indexed 1984 numbers.

Is Social Security taxed in my state?

Roughly 9–11 states still tax some Social Security in 2026 (MO, MN, MT, ND, UT are the main ones); the rest exempt it, many fully. The federal worksheet above applies in every state first.

Why did my taxes spike after retiring part-time?

The 50%-band cliff: every extra $1 of income adds $0.50 of taxable SS, so your marginal rate is bracket + 25% (and + 42.5% over $34k/$44k). A $6k raise can cost double the tax you expected.