How Much Should You Have in Your 401(k) by Age?

Open any article about retirement savings and you'll find a number designed to make you feel bad: the average 401(k) balance. For Americans aged 55–64, it's about $208,000 — which sounds like a lot until you realize it has to fund twenty-plus years of retirement. Then comes the median: $71,000. That's the number that actually describes a typical person, and it's not a comfortable one. But before you panic, understand what these numbers are really telling you — and the benchmark that matters more.

The benchmark worth knowing

Fidelity, which manages millions of 401(k) accounts, publishes a rule of thumb that's more useful than any average: aim to have 1× your annual salary saved by 30, 3× by 40, 6× by 50, and 8× by 60. It's aggressive — deliberately so — and most people miss it. But it gives you a personal target instead of a national average, and personal targets are the only ones you can act on.

Why do the averages look so grim? Because "average balance" mixes 25-year-olds who just started with 60-year-olds who've saved for decades, and it includes millions of accounts that were cashed out, abandoned after job changes, or never funded beyond the minimum. The median 35–44 balance is about $28,000. That doesn't mean a typical 40-year-old is doomed; it means a typical 40-year-old started late, saved inconsistently, or changed jobs without rolling anything over. All fixable.

What return should you expect?

Most planners model 401(k) portfolios at 5–8% average annual return, with 7% as the common middle estimate for a stock-heavy mix. The stock market's long-run average is around 10% before inflation; after inflation and fees, 7% is the planning number serious people use.

Here's the mental shortcut the pros use: the Rule of 72. Divide 72 by your return to get the years until your money doubles. At 7%, money doubles roughly every 10 years. At 8%, every 9 years. That $30,000 you have at 35, left alone at 7%, is about $60,000 at 45 and $120,000 at 55 — without adding a dime. Time is doing most of the work, which is exactly why starting beats optimizing. The perfect fund selection matters far less than the decade you gave it to compound.

What maxing out actually builds

Numbers make this concrete. Max out the 2026 limit — $24,500 a year — for 30 years at 7%, and you're looking at roughly $2.3 million. Can't max it? Contributing $500 a month ($6,000/year) for 30 years at 7% grows to about $600,000. Double it to $1,000 a month and you're near $1.2 million. These aren't fantasies; they're the same compounding math, just with smaller inputs.

And don't forget the match, which is effectively a 50–100% instant return on the matched dollars. A worker earning $65,000 with a typical 4.8% match gets about $3,120 a year from their employer — left invested for 40 years at a 10% return, that match alone could be worth over a million dollars. People obsess over fund expense ratios (fine, keep them low) while leaving the match unclaimed, which is like clipping coupons while ignoring a second paycheck.

Behind? The math of catching up

If you're 45 with $40,000 saved, the benchmarks say you're behind. Here's what catching up actually requires — no judgment, just arithmetic. To reach, say, $1 million by 65 at 7%, you'd need to contribute about $1,200 a month for 20 years. That's a lot, but it's a number, not a verdict — and it drops fast with the catch-up contributions available at 50+ ($8,000 extra per year) and the super catch-up at 60–63 ($11,250).

The most underrated catch-up tool isn't a contribution limit; it's your savings rate in your peak earning years. Someone who saves 6% from 25 to 45 and then 20% from 45 to 65 often ends up ahead of the person who saved 10% steadily the whole time — because the later dollars, though they compound less, are so much bigger. Late starts are expensive, not fatal.

The one number to check this week

Forget the national averages. Log into your 401(k), divide your balance by your salary, and compare it to the Fidelity checkpoints (1× by 30, 3× by 40, 6× by 50, 8× by 60). If you're short, don't try to close the whole gap at once — raise your contribution rate by one percentage point. Then do it again next year. The people who retire comfortably aren't the ones who found the perfect investment. They're the ones who kept raising that percentage and never stopped.