Can I retire at 65 with $1.5 million as a single person?

At 65, a single person with $1.5 million is past Social Security's full retirement age — so the claim-age question is mostly settled, and the planning conversation shifts to RMDs, Medicare IRMAA brackets, and tax-efficient withdrawal sequencing. The first five years of retirement spending mix is what sets your remaining 30-year tax bill.

The four levers, in priority order

Spending. $1.5 million puts you in the legacy-planning bracket where the question shifts from "is this enough?" to "what's the most tax-efficient way to spend down and pass on?" At the 4% safe rate, you're withdrawing $5,000/mo from the portfolio alone — most households at this tier don't actually need that much, so the planning move is to convert traditional balances to Roth aggressively in low-income years and minimize the IRMAA hit.

Asset allocation. At 65, your allocation conversation is less about "growth vs safety" and more about funding the next decade of withdrawals with low-volatility assets while keeping a long-duration growth sleeve. A common structure: 2 years of cash + spending in money market, 5–8 years in bonds, the rest in stocks. The cash sleeve gives you the option to NOT sell stocks in a down year — which is what protects the long-term plan.

Social Security. You're at or past FRA — claiming now gets you the full benefit. The remaining decision is whether to delay further toward 70 for the 8%/year delayed credit. For a single retiree at 65, that's a personal-longevity bet: each extra year you live past 81 makes delay worthwhile in NPV terms.

Common pitfall: single retirees consistently underestimate healthcare cost variance. Long-term care alone has a median lifetime cost around $172,000 (Genworth, 2025) and roughly 1-in-3 single retirees will need it for over a year. Yearfold's calculator doesn't model LTC explicitly — set aside ~$200K-$400K outside the simulated portfolio if you're self-funding that risk.

Why a single number isn’t an answer

A bank calculator might tell you “Yes, you can retire — your $1.5 million will last.” A Monte Carlo simulation tells you the share of plausible futures in which it lasts, the share in which it doesn’t, and what specifically goes wrong in the failure cases. The 10–25% of paths that don’t work are the part you’d actually want to defend against — by trimming spending, raising allocation, delaying Social Security, or working a couple of years longer.

Yearfold runs all 10,000 paths against your specific inputs and shows you the percentile band, plus three concrete fixes that move the success probability the most per unit of effort. Read the full methodology for the data-source and assumption details.