The Headline Number Is Not What You Think
Every year, Vanguard publishes one of the most widely-cited retirement studies in the country. The 2025 How America Saves report covers nearly 5 million defined contribution plan participants, and the headline number gets repeated in personal finance articles for months: the average 401(k) balance hit a record $148,153 at the end of 2024.
That number is interesting. It is also misleading.
The same Vanguard data shows that the median 401(k) balance is $38,176. That is a four-fold gap. The reason is straightforward: a small number of very large accounts (long-tenured executives, high earners, people who have been maxing contributions for decades) pull the average up. The median, which represents the actual midpoint where half of savers have more and half have less, gives a much truer picture of where most people stand.
If you have ever read a "what you should have saved by age X" article and felt like the numbers were not realistic, this is why. The averages are skewed. The medians are not.
The Full Breakdown by Age
Here is what Vanguard's 2025 report shows for both average and median 401(k) balances, broken down by age group at the end of 2024:
Under 25: Average $6,899 | Median $1,948
Ages 25-34: Average $42,640 | Median $16,255
Ages 35-44: Average $103,552 | Median $39,958
Ages 45-54: Average $188,643 | Median $67,796
Ages 55-64: Average $271,320 | Median $95,642
Ages 65+: Average $299,442 | Median $95,425
Look at any age bracket and the same pattern holds: the median is roughly 35-40% of the average. The 35-44 group, for instance, has a $103,552 average and a $39,958 median. That difference is the reason so many people Google "average 401(k) balance by age" and come away convinced they are behind, when in reality they are right around the typical saver in their cohort.
What These Numbers Actually Mean for You
Comparing yourself to the average is a recipe for unnecessary anxiety. Comparing yourself to the median is more useful, but even that is incomplete. A 401(k) balance is one slice of a retirement picture that includes IRAs, taxable brokerage accounts, home equity, pension or Social Security expectations, and overall savings rate. The real benchmark is not what other people have saved. It is whether your own trajectory will fund the retirement you actually want, which is the question most people never sit down to answer. Our article on the three numbers that actually tell you if you are ready to retire walks through that calculation in detail.
Still, benchmarks have value. They are most useful as a directional check rather than a verdict.
If you are at or above the median for your age group: You are saving more than half of your peers. That is a real signal of progress. The next question is whether your trajectory supports the retirement you actually want, which depends on your target lifestyle, retirement age, and savings rate.
If you are below the median: You are not alone, and you are not stuck. The same Vanguard report shows that 45% of participants increased their contributions in 2024, and the average savings rate is at a record high of 7.7% of pay (12% including employer match). Catch-up is mathematically possible, especially with employer matches, automatic escalation, and contribution limits that increase with age.
The Savings Rate Question Matters More Than the Balance
A balance is a snapshot. A savings rate is a trajectory. The trajectory is what determines where you end up.
Vanguard reports that the average employee contribution rate climbs steadily with age:
Under 25: 5.5% of pay | 25-34: 6.8% | 35-44: 7.3% | 45-54: 7.9% | 55-64: 9.3% | 65+: 10.1%
The widely-cited benchmark for a comfortable retirement is to save 12-15% of income annually, including any employer match. Most workers do not hit that on their own deferrals alone, but with a typical 4-5% employer match, the combined rate often does. Vanguard recommends 12-15% as a target, and Fidelity's 2025 retirement analysis pegs the actual combined average at 14.3%, which is close to the recommended range for the typical participant.
If your savings rate is below the benchmark, that is the lever to pull. A 1% increase per year, automated through plan-level contribution escalation, compounds into a meaningfully different retirement balance over a 20-30 year horizon. If you want to see exactly where your savings rate stands and how it compares to the benchmark, our free savings rate calculator runs the math in under a minute, no login required.
The Math on Compounding (Why the Earlier Decades Matter)
The reason 401(k) balances grow so dramatically between the 25-34 and 55-64 brackets is not just because people contribute more. It is because compounding does the heavy lifting in the later years on contributions made in the earlier years.
Consider a simplified example. Someone who contributes $5,000 per year starting at age 25, earning a 7% nominal return, will have roughly $691,000 by age 65. Someone who contributes the same $5,000 per year starting at age 35 will have roughly $325,000 by age 65. The 10-year delay costs more than $360,000, despite the same total annual contribution.
This is why the 25-34 cohort having a $16,255 median balance matters. It is not about the absolute number. It is about whether the contribution habit is in place. A 28-year-old with $20,000 saved and a 10% savings rate is in a much stronger position than a 28-year-old with $40,000 saved and a 4% savings rate, even though the second person has a "better" balance today.
What Drives the Gap Between Average and Median
The four-fold gap between the average and median 401(k) balance is not a statistical anomaly. It reflects three structural realities about how Americans save for retirement.
Tenure compounds inequality. Workers who stay at one employer for 20+ years, max contributions, and benefit from generous matches accumulate balances that are an order of magnitude larger than workers who change jobs frequently or contribute below the match. Job-changers often roll smaller balances or cash out. The gap widens with each decade.
Income matters more than discipline. Vanguard's data shows the average balance for participants earning $150,000+ is $377,488, while the average for participants earning under $15,000 is $25,716. Higher earners have more room to contribute, often max out their contributions, and benefit more from the tax deferral. Saving 10% of $200,000 produces a very different balance than saving 10% of $50,000.
Industry matters too. Vanguard reports that manufacturing workers tend to have higher balances due to longer tenures and stronger employer matches, while education, healthcare, and tech workers often have lower averages due to shorter tenures and more frequent job changes. The "average" 401(k) balance is really the average of dozens of very different sub-populations. Gen X in particular faces a unique version of this problem, since they were the first generation to depend almost entirely on 401(k) plans rather than pensions. Our piece on why Gen X was the 401(k) experiment goes deeper on that dynamic.
What to Do Next, Regardless of Where You Are
The single most useful thing about benchmarks like these is that they remove the mystery. Once you know where the median sits for your age group, you can stop wondering and start planning.
Capture the full employer match. The most common employer match formula is 50% of employee contributions up to 6% of salary. If you are contributing less than 6%, you are leaving money on the table. This is the single highest-return decision in personal finance.
Use automatic contribution escalation. Most 401(k) plans now allow automatic 1% annual increases. The increase is small enough that you barely notice it in your paycheck, but the compounding effect over 20-30 years is significant.
Take advantage of catch-up contributions if you are 50 or older. The 2026 contribution limit is $24,500, with an additional $8,000 catch-up for ages 50+. The Secure 2.0 Act introduced a higher "super catch-up" of $11,250 for ages 60-63. These limits exist specifically to help workers in their highest-earning years close the gap.
Run your own projection, not just a benchmark comparison. A balance benchmark tells you how you compare to peers. A retirement projection tells you whether your current trajectory will fund the retirement you actually want. Those are different questions, and only the second one matters when it is time to make decisions about your savings rate or retirement age.
Why a Plan Beats a Benchmark
Comparing yourself to the average 401(k) balance is the financial equivalent of comparing your weight to the national average. It is interesting context, but it does not tell you whether you are on track for the life you actually want. Two people with identical 401(k) balances can have completely different retirement outcomes depending on their savings rate, expected expenses, other accounts, and target retirement age.
That is the gap a planning tool fills. Waterfall Planning was built specifically to connect the pieces most people look at separately: your current budget, your savings goals, and a retirement projection that runs on your actual numbers, not industry averages. The retirement visualizer takes your current account balances, savings rate, expected retirement age, and projected expenses, and shows you whether the trajectory works. If it does not, you can adjust the inputs (a higher savings rate, a later retirement age, a different asset allocation) and see the impact instantly. No bank account linking required.
For people who want to build the planning habit before diving into the projections, our free Waterfall Foundations curriculum walks through budgeting, savings goals, and retirement planning in three short modules. It is free, there is no signup gate on the education content, and it is designed to be completable in an evening rather than dragged out across weeks.
Why the Median Is the Number Worth Watching
If you take one number from Vanguard's report, make it the median for your age group, not the average. The average is what financial media leads with because it is more dramatic. The median is what reflects reality for the typical saver.
A 35-year-old with $40,000 saved is not behind. They are exactly average for the group of 5 million participants Vanguard tracks. The question is not whether they have caught up to the people maxing out at age 25. The question is whether their savings rate is high enough to fund their retirement, given their income, expected return, and target retirement age.
That is a planning question, not a comparison question. And it is the one that actually matters. Open a free Waterfall Planning account and run the projection on your own numbers in under 10 minutes.