Why a $900,000 401(k) Is Worth More to a Retiree at 62 Than a $1.2 Million 401(k) at 73
The retiree with the smaller 401(k) holds something the wealthier one already lost: the power to decide when the IRS collects its cut. That window is open for a limited time, and most people walk right past it.
This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them.
Picture two retirees. One is 62 with $900,000 in a traditional 401(k). The other is 73 with $1.2 million. Most people would take the bigger account. The smaller one is worth more because the 62-year-old still determines when that money gets taxed and at what rate. The 73-year-old has already gave that decision to the IRS.
A Reddit post titled “Don’t miss the Roth Conversion window (I did)” captures the regret many retirees feel after missing this opportunity.
Gap Years Let You Pick Your Own Tax Bracket
The gap years run from your last paycheck to your first Social Security check. Your taxable income sits close to zero without wages or benefits, letting you choose your marginal tax bracket.
For a single filer in 2026, the standard deduction is $16,100, and the 12% bracket covers taxable income up to $50,400.
Put together, that lets you pull $66,500 a year out of a traditional 401(k) without paying more than 12% on any of it. The federal tax on that full amount comes to $5,800.
Hold off on Social Security until 70. From 62 through 69, that annual room adds up to $532,000 moved from the traditional account at low rates, before considering investment growth. You can spend it or move it into a Roth IRA through a Roth conversion: pay tax now, and the money grows tax-free later.
What the 73-Year-Old Already Gave Up
A required minimum distribution (RMD) is the amount the IRS makes you take from traditional accounts every year. RMDs start at 73 for anyone born from 1951 through 1959.
At 73, the IRS life-expectancy factor (the number you divide your balance by) is 26.5. On $1.2 million, that means a first-year withdrawal of $45,283. The factor gets smaller every year, so the required withdrawal keeps growing.
That withdrawal stacks on top of Social Security, triggering a tax increase. “Combined income” means your adjusted gross income plus half your benefits. Once it passes $34,000 for a single filer, up to 85% of your benefits become taxable.
Each extra dollar take can make another 85 cents of Social Security taxable, turning a 22% bracket into an effective rate of about 41%.
Medicare adds more. Single filers with income above $109,000 pay IRMAA, an income-based surcharge on the standard Part B premium of $203 a month, based on income from two years prior.
Waiting at 62 Turns the Smaller Account Into a Bigger Tax Problem
If the younger retiree leaves the $900,000 untouched, at a 6% annual return it grows to roughly $1.7 million by 73.
Its first RMD would be about $64,470, larger than the 73-year-old’s. Doing nothing recreates the older retiree’s problem on a larger scale.
Every dollar taken at 12% during gap years reduces every future RMD and lowers the income that can trigger taxes on your Social Security benefits. A partly emptied traditional account changes the math for every tax year ahead. That quiet stretch between your last paycheck and your first RMD may be the lowest tax rate you ever see again, which is the whole subject of our free Roth Window guide.
Three Moves for Your Remaining Window
- Work out your 12% limit every January. Add the standard deduction to the upper limit of the 12% bracket ($66,500 for single filers in 2026). Subtract any dividends, interest, or pension income, then take or convert what’s left.
- Live on the 401(k) and push Social Security toward 70. Waiting increases your check and it grows with inflation each year.
- Keep the two-year lookback in mind from age 63. Medicare premiums at 65 are set by income at 63, so keep conversions below $109,000 for a single filer.
Which Retiree You Should Want to Be
Take the $900,000 at 62. The $1.2 million at 73 is a larger account that comes with a withdrawal schedule set by the IRS and a tax increase already built in. The younger retiree has eight years to fill low brackets on purpose and cut the account down before RMDs start. That control is worth more than the $300,000 difference, but only if you use the window before it closes.
Contact [email protected] for any questions or corrections.
Jake has been been working in financial media for almost 15 years. He focuses on all things personal finance for 24/7 Wall St. with high hopes to educate and entertain. Most recently, Jake spent 12 years working various roles at The Motley Fool. He started copy editing fool.com content, worked on premium and marketing campaigns, and helped launch The Ascent, a personal finance brand.
His work has been featured on platforms like MSN, Yahoo Finance, USA Today, and more. He's written about credit cards, social security, ETFs, savings accounts, and just about anything else you can imagine when thinking about money. Jake love to cook, play golf, and tell people he's never had a cavity. (It's true!)
