It's the fear behind almost every retirement question: not dying too soon, but living so long the money runs out first. It's a reasonable worry — and a solvable one. The risk even has a name (longevity risk), and there are specific strategies built to handle it. Here's how to tell whether your savings will last, and what to do if you're not sure.
Why this is a real risk — people live longer than they plan for
Most people underestimate their own lifespan. Per the Social Security Administration's actuarial life tables, a 65-year-old today can expect, on average, close to two more decades of life — and averages hide the tail: a meaningful share live well into their 90s. For a married couple, the odds that at least one spouse reaches 90 are higher still. If you plan for “average” and you're the one who lives to 95, the plan comes up short in the years you can least afford it.
The three levers that decide whether your money lasts
It comes down to three things you can actually influence: how much you've saved and how it's invested, how much you withdraw each year, and how much of your income is guaranteed for life regardless of markets or lifespan.
Withdrawal rate
A common starting rule is to withdraw around 4% of your savings in year one of retirement and adjust for inflation after. It's a guideline, not a guarantee — withdraw too much early, especially in a downturn, and you speed up the drawdown. Building flexibility to spend a little less in down years meaningfully improves the odds your money lasts.
Guaranteed income you can't outlive
This is the part most plans underuse. Social Security is guaranteed lifetime income, which is why when you claim it matters — delaying benefits raises the monthly amount for life. Beyond that, an income annuity can turn part of your savings into a paycheck that keeps coming no matter how long you live — exactly the risk we're discussing. The goal isn't to annuitize everything; it's to cover essential expenses with income that can't run out, so market swings and long life stop being threats. See our overview of retirement planning.
Sequence of returns
A bad market in your first few retirement years does more damage than the same market later, because you're selling assets while they're down. Keeping a cushion of safer assets to draw from during downturns — so you're not forced to sell stocks at the bottom — protects the portfolio's longevity.
What to do if you're not sure your money will last
- Get a real projection, not a guess: run your savings, spending, and income through a plan that stress-tests a long life and a bad market.
- Cover essentials with guaranteed income (Social Security, and possibly an annuity) so your must-pay bills don't depend on markets.
- Revisit the plan every few years — longevity, spending, and returns all change.
The bottom line
Outliving your money is a real risk, but it's not luck — it's planning. The people who don't run out are usually the ones who matched their essential expenses to income they can't outlive, and stayed flexible with the rest.
Want to know if your savings will go the distance? Schedule a free consultation and we'll stress-test your plan.
Frequently asked questions
How long should I plan for my retirement savings to last?
Longer than you might think. Social Security data shows a 65-year-old today lives close to two more decades on average, and many live into their 90s, so planning to at least age 90-95 — especially for couples — is prudent.
What is the 4% rule?
It's a guideline suggesting you withdraw about 4% of your savings in your first retirement year and adjust for inflation after. It's a starting point, not a guarantee, and works best when you stay flexible in down markets.
How can I make sure I don't outlive my money?
Cover essential expenses with income you can't outlive — Social Security, and possibly an income annuity — so those bills don't depend on markets or lifespan. Keep the rest invested with a flexible withdrawal plan.
Does delaying Social Security help?
Yes. Delaying your claim increases your guaranteed monthly benefit for life, one of the most effective ways to protect against outliving your income.
This article is educational and isn't financial advice; your situation is unique, so talk with an advisor before making decisions.