401(k) millionaires reached a record 769,000 Fidelity accounts in mid-2026, yet most of those dollars are pre-tax, so every seven-figure balance also carries a deferred tax bill that comes due through required minimum distributions.
By Craig Wear, CFP® | Last reviewed: October 9, 2026
Key Takeaways
- Fidelity counted a record 769,000 401(k) accounts with at least $1 million at the end of June 2026, up 115,000 from 654,000 at the end of March, and 684,140 IRA millionaires (Fidelity data via Money, confirmed by a Fidelity spokesperson).
- The average 401(k) millionaire was 58 years old and had been saving for 25 years; Gen X made up 62% of the group, baby boomers about 31%, and millennials 6% (Money, September 2026).
- 401(k) millionaires saved an average of 17.3% of pay on their own and 25.8% including employer contributions, against a record plan-wide average of 9.6% employee and 14.4% total (Fidelity Q2 2026 Retirement Analysis).
- The average Fidelity 401(k) balance hit a record $155,800 in Q2 2026, across 25.8 million participants in 27,300 corporate plans (Fidelity).
- RMDs begin at 73 for people born 1951 to 1959 and at 75 for those born 1960 or later, which covers every Gen X millionaire; the IRS divisor at 75 is 24.6 (IRS Publication 590-B).
- Medicare IRMAA surcharges start above $109,000 of MAGI for single filers and $218,000 for joint filers in 2026, with total Part B premiums of up to $689.90 a month (CMS).
- Designated Roth balances in a 401(k) carry no RMDs during the owner’s lifetime, a key reason Roth conversions enter the conversation for seven-figure savers (IRS RMD FAQs).
401(k) Millionaires by the Numbers (Q2 2026)
Fidelity figures count individual accounts on Fidelity’s recordkeeping platform as of June 30, 2026, not households or all U.S. savers. RMD age reflects SECURE 2.0 rules for 2026.
What does Fidelity’s latest data say about 401(k) millionaires?
Fidelity’s most recent quarterly count shows 769,000 401(k) millionaires as of June 30, 2026, a record. That figure was 115,000 higher than the 654,000 counted at the end of March, according to Fidelity figures reported by Money and confirmed by a Fidelity spokesperson.
The jump tracked markets more than new saving. Fidelity’s Q2 2026 Retirement Analysis reported that the average 401(k) balance rose 10% in the quarter to a record $155,800, its strongest quarterly growth since late 2020, while average IRA balances rose 10% to $144,523.
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Against Fidelity’s 25.8 million 401(k) participants, 769,000 millionaires works out to roughly 3% of accounts. For how a seven-figure balance compares with age-based savings targets, see age-based 401(k) savings targets, and for broader household data, the retirement account balances by age report. For the share of all households at that level, see what percentage of people retire with $1 million.
Who are today’s 401(k) millionaires?
The typical 401(k) millionaire is a late-career saver, not a young windfall. Fidelity’s data puts the average age at 58, with 25 years of saving behind the balance.
By generation, Gen X (born 1965 to 1980) accounted for 62% of 401(k) millionaires, baby boomers (born 1946 to 1964) about 31%, and millennials (born 1981 to 1996) 6%, per Money’s report of the Fidelity figures.
That age profile matters for taxes. A 58-year-old in 2026 was born around 1968, which places the first required minimum distribution at age 75, roughly 17 years away, with a long runway of compounding on mostly pre-tax dollars in between.
How did they get there: savings rate, time, or the match?
The data points to all three, with savings rate standing out most. 401(k) millionaires deferred an average of 17.3% of pay, nearly double the plan-wide average of 9.6%, and reached 25.8% once employer contributions were added.
The employer share is meaningful at every level. Fidelity reported that employers contributed an average of 4.8% of pay in Q2 2026 and that 81.2% of participants received the full match, a pattern explained in more detail in what a 401(k) match is and how it works.
| Measure (Q2 2026) | 401(k) millionaires | All Fidelity 401(k) participants | Source |
|---|---|---|---|
| Employee savings rate | 17.3% | 9.6% (record) | Fidelity via Money; Fidelity Q2 2026 |
| Total savings rate with employer | 25.8% | 14.4% | Fidelity via Money; Fidelity Q2 2026 |
| Typical balance | $1 million or more | $155,800 average; $35,800 median | Fidelity; Money |
| Age and tenure | Average age 58, 25 years saving | Not reported as a single figure | Fidelity via Money |
| Count | 769,000 accounts | 25.8 million participants | Fidelity via Money; Fidelity Q2 2026 |
For 2026, the IRS allows $24,500 in elective deferrals, an $8,000 catch-up at 50 and over, and $11,250 for ages 60 to 63 (IRS). Sustained deferrals near those limits over two decades or more is the common thread in the millionaire profile.
Why is a seven-figure 401(k) also a seven-figure tax liability?
Because most 401(k) money went in pre-tax, every dollar withdrawn later is taxed as ordinary income. A $1 million traditional balance is better understood as $1 million minus a future tax bill whose size depends on the brackets in effect when the money comes out.
The IRS forces that money out through required minimum distributions. At 73, the Uniform Lifetime Table divisor is 26.5, so a $1 million balance produces a first-year RMD of about $37,736; the full year-by-year math for seven-figure accounts is covered in RMD strategies for IRA millionaires.
Two rules shape the timing. Workers who are not 5% owners can generally delay RMDs from their current employer’s 401(k) until the year they retire, and missed RMDs face a 25% excise tax, cut to 10% if corrected within two years (IRS RMD FAQs).
When will today’s 401(k) millionaires face RMDs, and how large could they be?
Most current 401(k) millionaires will start RMDs at 75, not 73. SECURE 2.0 set the starting age at 73 for people born 1951 to 1959 and 75 for those born 1960 or later, which covers the entire Gen X majority of the group.
The gap between today and age 75 is where balances can keep compounding. The table below is a hypothetical illustration only, using a $1 million balance at the average millionaire age of 58, no further contributions or withdrawals, and fixed growth rates chosen for arithmetic, not as a projection of any investment’s returns.
| Hypothetical growth rate (ages 58 to 75) | Balance at 75 | First RMD at 75 (divisor 24.6) |
|---|---|---|
| 0% (balance unchanged) | $1,000,000 | $40,650 |
| 4% a year for 17 years | $1,947,900 | $79,183 |
| 6% a year for 17 years | $2,692,773 | $109,462 |
Divisor from Table III in IRS Publication 590-B. Ongoing contributions would raise these figures; earlier withdrawals or conversions would lower them. The point is structural: a balance that crosses $1 million in the late 50s can produce a six-figure taxable distribution in year one of RMDs without any change in behavior.
How do RMDs collide with IRMAA, Social Security taxes, and bracket creep?
A large RMD stacks on top of Social Security, pensions, and investment income, and that combined figure drives several separate tax thresholds at once. In 2026 the 24% bracket tops out at $201,775 for single filers and $403,550 for joint filers (see 2026 federal income tax brackets).
Medicare is the threshold most often crossed. CMS sets the first 2026 IRMAA tier above $109,000 of MAGI for single filers and $218,000 for joint filers, and total Part B premiums run from $202.90 to $689.90 a month by tier (CMS), based on the tax return from two years earlier (SSA). Tier-by-tier detail lives in the 2026 IRMAA brackets guide.
Social Security adds another layer: once combined income passes $25,000 to $34,000 for single filers or $32,000 to $44,000 for joint filers, up to 85% of benefits become taxable, an effect explained in the Social Security tax torpedo analysis. Because these thresholds are fixed in law or indexed slowly while account balances compound, larger RMDs tend to push more income into higher tiers over time.
Where do Roth conversions fit for a 401(k) millionaire?
Roth conversions move pre-tax dollars into Roth accounts now, at today’s brackets, so they are not forced out later as RMDs. For a 401(k) millionaire, the window between retirement and age 75 is often the stretch with the lowest taxable income, which is why conversions are commonly modeled in those years.
Several mechanics are specific to 401(k) balances. If the plan offers an in-plan Roth rollover, participants can convert vested balances inside the plan, including amounts not otherwise distributable, with the taxable amount included in income for that year (IRS designated Roth FAQs). Since 2024, designated Roth 401(k) balances have no RMDs during the owner’s lifetime.
New money is also shifting toward Roth by rule. Starting in 2026, participants 50 and over whose prior-year FICA wages from the employer exceeded $150,000 must make catch-up contributions as Roth (IRS Notice 2025-67), which describes many people in the millionaire profile.
The order of operations (IRA first or 401(k) first, rollover then convert, or in-plan) is laid out in which account to convert first, and sizing each year’s amount is covered in how much to convert to Roth. A financial professional can model whether partial conversions over several years would lower projected lifetime taxes, RMDs, and IRMAA exposure in a specific situation.
What happens to a seven-figure 401(k) when the owner dies?
The tax bill passes to whoever inherits it. A surviving spouse generally files as a single taxpayer after the year of death, so the same RMDs land in narrower brackets, the pattern described in the widow’s tax trap analysis.
Most non-spouse heirs face the 10-year rule: a designated beneficiary who is not an eligible designated beneficiary must empty the account by the end of the 10th year after the owner’s death (IRS). For adult children in their own peak earning years, compressing a seven-figure pre-tax balance into a decade can mean withdrawals at high marginal rates; Roth dollars inherited under the same rule are generally received tax-free if the five-year requirement is met.
What does the 401(k) millionaire count not tell you?
The count is a useful snapshot, not a census. It reflects accounts on Fidelity’s recordkeeping platform only, measures single accounts rather than households, and excludes savers whose $1 million is spread across several plans, IRAs, or other providers.
It also moves with markets. The 115,000-account gain in Q2 2026 followed a quarter of strong stock returns, and a weak quarter can shrink the count just as quickly. The gap between the $155,800 average and the $35,800 median shows how much a minority of large balances lifts the average.
Finally, the count is silent on tax character. Fidelity does not report how much of a millionaire’s balance sits in Roth versus pre-tax sources, which is the single figure that most determines the eventual tax bill.
Frequently Asked Questions
How many 401(k) millionaires are there in 2026?
Fidelity counted a record 769,000 401(k) accounts with balances of $1 million or more at the end of June 2026, up from 654,000 at the end of March. The figure covers only accounts on Fidelity’s platform.
How old is the average 401(k) millionaire?
The average 401(k) millionaire in Fidelity’s Q2 2026 data was 58 years old and had been saving for 25 years. Gen X made up 62% of the group, baby boomers about 31%, and millennials 6%.
What percentage of 401(k) participants are millionaires?
About 3% of Fidelity’s accounts. Fidelity reported 769,000 401(k) millionaires against 25.8 million participants in its corporate plans as of June 30, 2026.
How much do 401(k) millionaires save each year?
401(k) millionaires saved an average of 17.3% of pay on their own and 25.8% including employer contributions. The plan-wide averages were 9.6% and 14.4%.
How many IRA millionaires does Fidelity report?
Fidelity reported 684,140 IRA millionaires at the end of June 2026, up from 571,622 at the end of March. The average IRA balance was $144,523.
At what age do 401(k) millionaires have to take RMDs?
RMDs start at 73 for people born 1951 to 1959 and at 75 for those born 1960 or later. Workers who are not 5% owners can generally delay RMDs from their current employer’s plan until the year they retire.
Do Roth 401(k) balances require RMDs?
No. Since 2024, designated Roth accounts in a 401(k) or 403(b) have no required minimum distributions during the owner’s lifetime, although beneficiaries must still follow RMD rules after the owner’s death.
Can a 401(k) millionaire convert to Roth while still working?
Yes, if the plan offers in-plan Roth rollovers. Participants can convert vested balances to the plan’s designated Roth account, and the taxable amount is included in income for the year of the conversion.
Methodology: 401(k) and IRA millionaire counts, ages, generational shares, and millionaire savings rates are Fidelity Investments figures for the quarter ended June 30, 2026, as reported by Money and confirmed by a Fidelity spokesperson. Average balances, plan-wide savings rates, match rates, and participant counts come from Fidelity’s published Q2 2026 Retirement Analysis. Tax rules, contribution limits, RMD divisors, and Medicare premiums come from IRS, CMS, and SSA primary sources. The growth table is hypothetical arithmetic for illustration and is not a projection of investment returns. Because this topic affects financial decisions, anonymous forum anecdotes and unsourced claims were excluded.
This article is for educational purposes only and is not individualized investment, tax, or legal advice. Consult a qualified professional about your specific situation.
