Retirement

Is Social Security taxable? The real numbers

Usually some of it, never all of it. Two income lines decide how much counts, and a new 2025 deduction wipes out the bill for a lot of retirees. Plain math here.

Updated September 2026 · 6 min read

Ask three people whether Social Security gets taxed and you'll hear three answers: never, always, and 85%. No wonder; the real rule is a worksheet nobody reads. Here it is in plain words, with the 2025 numbers, plus the new deduction that quietly cancels the tax for a lot of retirees this year.

Two lines decide, and 85% is the ceiling

Start with one number the IRS calls combined income: all your other income (pension, IRA withdrawals, wages, interest, even tax-exempt bond interest) plus half of your Social Security. Then, for 2025:

• –Under $25,000 (single) or $32,000 (married filing jointly): none of your Social Security is taxable.
• –From $25,000 to $34,000 (single) or $32,000 to $44,000 (joint): up to half of it counts as income.
• –Above that: up to 85% of it counts. Never more. At least 15 cents of every benefit dollar is tax-free for life, no matter your income.

So a retiree whose only income is a $24,000 benefit owes nothing and generally doesn't need to file at all (our guide on whether you even need to file has those thresholds). It's the pension or the IRA withdrawal stacked on top that pulls benefits into the taxable zone.

New for 2025: the extra senior deduction

Starting with 2025 returns there's a new deduction of $6,000 per person 65 or older ($12,000 for a couple who both qualify). It sits on top of the standard deduction and the existing 65-plus add-on; you don't itemize to get it. It shrinks by 6 cents per dollar once income passes $75,000 ($150,000 joint), and it isn't available if you're married filing separately.

For a typical retiree in the up-to-85% zone, this deduction cancels some or all of the tax the Social Security math just created. Same worksheet, smaller bill. It's why plenty of people who owed in 2024 will owe less or nothing on the same income in 2025.

Two traps worth knowing

• –Married filing separately is brutal here: the threshold for a separate filer is zero, so benefits start counting from the first dollar. If you're separated but still married, this is a real reason to look hard at filing jointly.
• –The $25,000 and $32,000 lines have never been adjusted for inflation. Benefits rise every year, the lines don't move, so each year a few more people cross into taxable territory. If you crossed this year, nothing went wrong; the line just stood still.

Stop the April surprise: withhold from the checks

1. 01File Form W-4V with Social Security to withhold a flat 7%, 10%, 12%, or 22% from each benefit payment. One page, one checkbox.
2. 02Or have your pension or IRA custodian withhold a bit more instead; withholding from any source counts the same.
3. 03Lost your SSA-1099? Download a replacement in minutes from your my Social Security account at ssa.gov, or it's in your IRS transcript; our guide on getting old W-2s and 1099s shows that door.