The “Tax Torpedo”: How Social Security and IRA Withdrawals Collide

Social Security benefits aren’t simply “taxable” or “tax-free.” They slide along a formula: depending on your combined income (adjusted gross income + tax-exempt interest + half your benefits), between 0% and 85% of your benefit joins your taxable income. The thresholds — $25,000 single, $32,000 married — were set decades ago and have never been indexed for inflation, which is why a majority of retirees now pay tax on benefits that were once untouchable.

Why they call it a torpedo

Inside the phase-in range, every additional dollar you withdraw from an IRA does double duty against you: it’s taxed itself, and it drags up to 85 cents of Social Security into taxable income with it. The result is an effective marginal rate far above your bracket — a retiree nominally in the 22% bracket can face a real rate near 40% on the wrong dollars. It strikes mid-income retirees hardest: not enough income to be fully phased in already, too much to escape.

The planning window most people waste

The years between retiring and claiming — especially before required minimum distributions begin at 73 or 75 — are often the cheapest tax years of your entire retirement. Filling those low brackets deliberately with IRA withdrawals or Roth conversions shrinks the traditional balance that would otherwise collide with your benefit later. Delaying the claim (see why the higher earner often should) widens that window.

Three practical notes

• Virginia doesn’t tax Social Security — this is a federal problem, which means it’s solvable with federal-side sequencing.
• The 2025 law helps, temporarily: taxpayers 65+ get an extra deduction (2025–2028, income limits apply) that softens — but doesn’t repeal — the underlying formula.
• Medicare is watching too: big withdrawal years can raise IRMAA premiums two years later. Claiming, withdrawals, conversions, and Medicare are one decision wearing four costumes.

The torpedo is entirely visible in advance — on a year-by-year tax projection, it shows up as a spike you can plan around. That projection is exactly what a claiming review is for.