Half your benefit counts before you even start
Provisional income already includes 50% of your Social Security benefit before any threshold test runs — so benefits themselves push you toward taxing more of themselves, a detail that trips up a lot of retirement income planning. Deciding when to claim in the first place? See the Social Security Claiming Calculator.
Frequently asked questions
What is "provisional income"?
Your other income (wages, pensions, withdrawals, investment income) plus tax-exempt interest, plus half of your Social Security benefit. It's a special measure used only to decide how much of your benefit becomes taxable — it isn't itself a tax base.
Why haven't these thresholds changed in decades?
Unlike almost every other figure in the tax code, the $25,000/$34,000 (single) and $32,000/$44,000 (married filing jointly) thresholds were fixed by the original 1983 and 1993 legislation and were never indexed for inflation — so more retirees cross them every year as incomes rise, a well-known and long-criticized "stealth tax" effect.
Can more than 85% of my benefits ever be taxed?
No — 85% is a hard ceiling under current law, no matter how high your other income is.
Last updated: June 2026