At age 73, the IRS stops letting retirement savers defer taxes on their 401(k) balances. Required minimum distributions kick in, and the nest egg starts generating a tax bill whether the retiree needs the cash or not. For the typical American in their 70s, that first RMD is larger than most expect and lands on top of Social Security in a way that often pushes total income into a higher bracket. This article walks through what the average balance actually looks like, how the RMD is calculated, and why the tax bill often exceeds expectations.
What a 73-Year-Old Actually Has Saved
According to Empower’s analysis of anonymized 401(k) data through January 2026, the average 401(k) balance for Americans in their 70s is $431,834, while the median sits at $95,931. The gap between those two figures is wide. If ten retirees each have roughly $95,000 saved and one walks in with $3.5 million, the median stays at $95,000 while the average leaps toward $400,000. That is roughly the shape of the 70-something 401(k) landscape: a small group of very large balances pulls the mean far above what most retirees actually hold.
Fidelity’s data reinforces that gap on the plan tenure side. Among the more than 5.5 million workers who have been in the same 401(k) plan for at least five straight years, the average balance reached $304,200 at the end of 2025, still short of the Empower figure for 70-somethings because it includes younger long-tenured savers. Vanguard’s broader 401(k) participant data shows an average balance of $148,153 and a median of $38,176, a reminder that population-wide averages depend heavily on which slice of savers is being measured.
How the $16,296 RMD Number Comes Out
The IRS uses the Uniform Lifetime Table to calculate required minimum distributions. At age 73, the divisor is 26.5. A retiree divides their prior year-end 401(k) balance by that number to get the current-year RMD.
Applied to the average 70-something 401(k) balance, the arithmetic is $431,834 divided by 26.5, or roughly $16,296. That amount must be withdrawn from the account before December 31 and counts as ordinary income on the federal return. A retiree at the median balance faces a much smaller distribution, around $3,620, but the same tax mechanics apply.
Why the Tax Hit Surprises People
Three forces converge at 73 that most savers do not model in advance.
The RMD is mandatory, and its size is fixed regardless of what the retiree actually spends. The narrow exception is a current employer’s 401(k) if the retiree is still working past 72. For everyone else, the distribution must be taken on time, or a penalty applies.
The distribution stacks on top of Social Security. Social Security program expenditures grew from $1,427.6 billion in the first quarter of 2024 to $1,630.3 billion in the first quarter of 2026, reflecting both a rising number of beneficiaries and the 2.8% cost-of-living adjustment for 2026. Adding a $16,296 RMD to a rising Social Security check can push up to 85% of benefits into the taxable zone.
Safe parking of the withdrawal offers little relief. The FDIC national average yield on 12-month CDs was 1.65% as of June 1, 2026, down from a peak of 1.76% in August 2025. Any interest earned on the redeposited RMD adds to taxable income the following year, compounding the bracket problem.
Rising costs make the squeeze tighter. The Consumer Price Index reached 333.979 in May 2026, up from 322.169 in July 2025, and average annual household expenditures were $78,535 in 2024, up from $72,973 in 2022. For a 73-year-old whose highest fixed costs are healthcare and housing, an RMD adds taxable income without adding real purchasing power.
What Can Actually Change the Number
The account balance and the IRS table fix the RMD itself. The tax treatment is more flexible. Retirees can direct up to $111,000 in 2026 through a qualified charitable distribution, sending the RMD straight from the IRA to a 501(c)(3). The transfer counts toward the RMD while staying off the taxable income line.
Roth conversions before 73 shrink the traditional balance that RMDs are calculated against. Every dollar converted in the 60s reduces the size of the required withdrawal at 73, though the conversion itself is taxed in the year it happens.
Delaying the first RMD until April 1 of the year after turning 73 is allowed, but it forces two distributions into the same tax year and often creates a larger bracket problem than it solves. The $16,296 figure is what the math produces for the average 70-something 401(k) balance. The tax bill it triggers is the part most retirees do not see coming until the 1099-R arrives in January.
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