The Average Gen Xer on Fidelity’s Platform Has $222,100 in a 401(k) and Saves 10.4% of Pay. Here’s What That Can Grow Into by 67

A Gen Xer looking at Fidelity’s latest retirement numbers sees an average 401(k) balance of $222,100 and an employee savings rate of 10.4%, and the first question is whether their own account is ahead or behind. What could that balance grow into by full retirement age? A recent piece in this series looked at what the average Boomer balance can pay today. This one looks forward, since most Gen X workers still have years of paychecks and contributions left.

What Fidelity’s Gen X Average Measures

Fidelity’s Q4 2025 data covers 24.8 million participants as of December 31, 2025. Gen X employers added 5.0% of pay beyond what workers put in. Fidelity counts Gen X as people born between 1965–1980.

An average gets pulled up by a few very large accounts. If nine people have $50,000 and one has $2 million, the average is $245,000, even though nine of the ten have far less. The figure also covers one account on one platform. Someone with an old 401(k) somewhere else or an IRA could have more saved overall, and someone who just changed jobs could show a smaller balance.

Projecting $222,100 Forward to Age 67

Full retirement age is 67 for anyone born in 1960 or later, according to the Social Security Administration, so the projection ends there. It starts with a 50-year-old, which leaves 17 years of saving.

Salary is set at $64,064, based on the Bureau of Labor Statistics median weekly pay for full-time workers ($1,232) in the third quarter of 2026, annualized. The model also assumes 3% raises each year and a combined contribution of 15.4% of pay (worker plus employer), deposited at year-end.

Monthly income uses the 4% rule, meaning you take out 4% of the balance in the first year. That annual amount is split into 12 payments, as shown below. The figures are in future dollars and aren’t adjusted for inflation.

For scale, the 10-year Treasury yield was about 5% on October 27, 2026. That puts a bond-heavy portfolio’s likely return near the low end of the table, and a stock-heavy portfolio could land higher or lower.

Four Levers That Change the Outcome

All of the inputs below use the 6% scenario. Raising the savings rate by one percentage point, to 11.4%, increases the balance at 67 by about $22,207. That gain comes from a one-point change in the contribution rate.

Catch-up contributions are extra money that workers 50 and older can add on top of the standard limit. For 2026, the standard employee limit is $24,500, while the catch-up is $8,000 for ages 50 to 59 and 64 or older, and $11,250 for ages 60 to 63.

Adding an extra $8,000 a year from age 50 through 59 would add roughly $158,552 by age 67. Workers who earned more than $150,000 in 2025 must make those catch-up contributions as Roth contributions, which come out of after-tax pay.

Working two more years, to 69, means two more years of contributions and growth. That raises the balance to about $1,090,329, or $3,634 a month under the 4% rule. Delaying Social Security adds 2/3 of 1% to the benefit for each month you wait beyond full retirement age, which works out to 8% a year, up to age 70.

The average retired worker’s benefit is $2,071 after the 2026 cost-of-living adjustment. Waiting two years would raise that amount to about $2,402. Under the 2026 Trustees Report, the combined trust funds are projected to run out in 2034. After that, about 83% of scheduled benefits would still be payable.

Sequence Risk and 401(k) Loans Near the Finish Line

Sequence-of-returns risk is about when losses happen. A market drop in the years just before or after 67 hits the account when it’s at its largest, and there’s less time to recover. If withdrawals have already started, selling during a downturn locks in those losses (we walked through how to protect those early retirement years in a free guide here).

Outstanding 401(k) loans are another factor that can slow account growth. Fidelity data shows 25.8% of Gen X savers had an outstanding 401(k) loan, compared with 14.0% of Boomers and 19.7% of Millennials. The borrowed money sits outside the market until it’s paid back, and repayments come out of after-tax pay. Some borrowers also cut their contributions while they repay, which slows growth even more.

One Number to Watch This Year

Of all the factors in this projection, the savings rate is the one each worker sets directly. In the fourth quarter of 2025, 10.7% of Gen X workers on Fidelity’s platform raised their contribution rate. At the median salary used here, one more percentage point adds about $641 in the first year.

Over 17 years, that change accounts for the gap between the $940,057 and $962,264 balances in the 6% scenario.

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