Somewhere in America, 665,000 people have crossed the million-dollar mark in their 401(k) accounts. That is the highest number Fidelity Investments has ever recorded, based on the roughly 49 million workplace retirement accounts it manages, and it reflects what two consecutive years of outsized stock market gains can do for workers who stayed the course.
But zoom out from that top tier and the picture changes fast. Federal Reserve data shows the median retirement account balance for working-age households remains well below six figures. For Americans between 35 and 44, it sits around $45,000. For those under 35, it is closer to $18,000. The 401(k) system is producing millionaires at a record clip and leaving most participants far behind at the same time.
Who the 401(k) millionaires actually are
Fidelity’s first-quarter 2025 data sketches a clear profile. The typical 401(k) millionaire in its system has been saving consistently for about 26 years, contributes roughly 17.5% of their salary when employer matching is included, and holds a portfolio heavily tilted toward stocks. These balances were not built by a single lucky bet. They are the product of decades of uninterrupted participation, compounding, and market exposure.
That market exposure has been especially rewarding lately. The S&P 500 gained about 24% in 2023 and roughly 23% in 2024. For workers who stayed fully invested through both years, account balances surged. Fidelity reported that the number of 401(k) millionaires jumped approximately 27% year over year as of the first quarter of 2025.
The catch is that the pool of people positioned to capture those gains is small. Reaching a seven-figure balance typically requires above-median income, continuous employment at a company offering a strong plan, and enough financial stability to avoid dipping into the account early. That combination describes a fraction of the workforce.
It is also worth noting that the Q1 2025 snapshot preceded significant market turbulence later in the spring, when tariff-related uncertainty triggered sharp selloffs before a partial recovery. The millionaire count may have fluctuated since then, though Fidelity has not released updated figures.
Where the median saver actually stands
The Federal Reserve’s Survey of Consumer Finances, last conducted in 2022 and published in October 2023, remains the most comprehensive look at how retirement wealth is distributed across American households. The numbers are stark.
Among families headed by someone aged 35 to 44, the median retirement account balance was approximately $45,000. For those 45 to 54, it was about $115,000. Workers under 35 had a median of roughly $18,000. Those figures combine 401(k)s, IRAs, and other tax-advantaged accounts, meaning the 401(k)-only balances are likely lower still.
For additional context, Fidelity reported that the average 401(k) balance across all its accounts stood at about $131,700 in Q1 2025. Averages are pulled upward by the millionaires at the top, so the typical worker’s balance is considerably less.
The Fed’s separate Survey of Household Economics and Decisionmaking, published in 2024, adds behavioral detail. It found that many workers who do have access to a retirement plan contribute at rates too low to build meaningful wealth, and that a significant share of lower-income workers have no access to an employer-sponsored plan at all. Among private-sector workers earning less than $25,000 a year, fewer than half had access to any workplace retirement plan.
The upshot: the retirement system tends to amplify the income gaps workers bring into it. Higher earners contribute more, receive larger employer matches in dollar terms, benefit from compound growth on bigger balances, and are far less likely to take hardship withdrawals. Workers at the bottom face the reverse on every count.
Why the gap keeps widening
Three structural forces push the two groups further apart, and none of them are new.
Plan access is uneven. The Bureau of Labor Statistics reports that only 73% of private-industry workers had access to a retirement plan as of March 2024, and just 54% actually participated. At firms with fewer than 50 employees, access drops sharply. Workers cycling through part-time, gig, or contract roles often have no employer plan available to them.
Contribution rates diverge by income. Vanguard’s 2024 “How America Saves” report found that workers earning over $150,000 saved a median of 9.4% of pay, while those earning under $30,000 saved about 5.4%. Applied to actual salaries, that gap in percentage points translates into a chasm in dollars: a worker earning $160,000 and saving 9.4% puts away $15,040 a year before any match, while a worker earning $28,000 and saving 5.4% contributes $1,512.
Early withdrawals erode balances. The Fed’s household survey found that a meaningful share of workers pulled money from retirement accounts after financial shocks, including medical bills, job loss, and housing costs. Each withdrawal reduces the current balance and eliminates years of future compound growth. A $10,000 withdrawal at age 35, assuming roughly 7% average annual returns over 30 years, would have grown to more than $76,000 by age 65. That is money that never comes back.
What policy is doing about it
The most significant recent legislative response is the SECURE 2.0 Act, signed into law in December 2022. Starting in 2025, new 401(k) and 403(b) plans are required to automatically enroll eligible employees at a contribution rate of at least 3%, with annual escalation of 1% up to at least 10%. The idea is straightforward: make saving the default rather than something workers have to opt into.
Early evidence from plans that adopted auto-enrollment voluntarily is encouraging. Vanguard found that plans with automatic enrollment had participation rates above 90%, compared with roughly 65% for plans that required workers to sign up on their own. Whether the mandatory version moves the national median in a meaningful way will depend on how many new plans are formed and how many small employers, who are exempt if they have 10 or fewer employees, remain outside the system.
Other SECURE 2.0 provisions expand catch-up contribution limits for workers aged 60 to 63 and allow employer matching contributions to be directed into Roth accounts. These changes primarily benefit workers who are already saving at healthy rates, which means they could widen the gap in absolute dollar terms even as auto-enrollment narrows the participation gap.
What actually separates a seven-figure balance from a five-figure one
The 665,000 millionaire milestone is real, but it describes a narrow slice of the American workforce. For most workers, the more pressing question is not how to reach $1 million but how to avoid arriving at retirement with almost nothing.
The data from Fidelity, Vanguard, and the Federal Reserve all point to the same handful of factors. Enrolling in a plan early, even at a modest contribution rate, creates a base that compound growth can build on over decades. Taking full advantage of an employer match is the closest thing to a guaranteed return in personal finance. Avoiding early withdrawals, even when the pressure to tap the account is real, preserves years of future growth. And staying invested in a diversified portfolio through downturns, rather than shifting to cash after a drop, is what separates the accounts that eventually reach seven figures from those that plateau.
None of that is simple for workers living paycheck to paycheck, and that is precisely why the gap exists. The record number of 401(k) millionaires shows what the system can produce under favorable conditions: steady income, consistent access, decades of time, and the discipline or luck not to need the money early. The $45,000 median is a measure of how rarely all those conditions line up at once.
