The Average 401(k) Is $167,970. The 4% Rule Turns That Into $560 a Month. Social Security Pays $2,081.

The average 401(k) balance of $167,970 produces only $560 a month under the 4% rule, while Social Security pays $2,081 monthly.

The $167,970 average sits at the 75th percentile, and the median balance is just $44,115, meaning most workers have far less saved.

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Three numbers frame the American retirement picture, and they do not tell the story most people think. The average 401(k) balance is $167,970. Applied to the classic 4% withdrawal rule, that produces roughly $560 a month in year one. The average Social Security retirement benefit is $2,081, per the Social Security Administration. For most workers, the check from Washington is the retirement plan. The work-life balance is the supplement.

Vanguard's How America Saves 2026 report indicates that the average account balance for its participants was $167,970 in 2025, while the median was $44,115. Both climbed sharply from the prior year, up 13% and 16% respectively, helped by a 19.3% one-year participant return. The mean, or arithmetic average, adds every balance and divides by the number of accounts. The median is the middle value: half of participants have more, half have less.

The gap is enormous because a small number of very large accounts pull the average upward. Vanguard states this plainly: the average represents roughly the 75th percentile, meaning about three in four participants have less than the mean. One in four accounts holds less than $10,000, while 18% hold $250,000 or more. When commentators cite "the average 401(k)," they are describing balances above what most workers actually have.

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The all-ages averages lump together 25-year-olds who just signed up with 60-year-olds who are staring down retirement. Vanguard itself notes that average balances tend to reflect longer-tenured, more affluent, or older participants. But for a discussion about retirement income, only the balances at retirement age really matter, and those numbers for typical near-retirees sit well below the headline average. The distribution tells the real story. A full 26% of accounts hold less than $10,000, and only 35% clear the $100,000 mark. A defined contribution plan like a 401(k) or 403(b) is only as strong as what the worker put in over the years.