Photo by Joachim Schnürle on Unsplash
What We Found
What if the most expensive thing in a 62-year-old's retirement plan isn't a fee, a fund, or a bad stock pick — but a calendar?
According to 24/7 Wall St., reported via Google News, the average 401(k) balance for Americans aged 60 to 64 sits at $246,500, and every year a 62-year-old in that situation skips a Roth conversion can cost roughly $3,000 in extra tax later, once Required Minimum Distributions (RMDs — the withdrawals the IRS forces you to take from a traditional retirement account) kick in. As of October 19, 2026, the IRS sets that RMD starting age at 73 for anyone who reached 72 after December 31, 2022, a change made by the SECURE 2.0 Act in 2023. Do the subtraction and you get the number that actually matters here: an 11-year window, roughly ages 62 through 73.
Most coverage stops at "conversions are smart." The more useful question is narrower and more uncomfortable: what is a single year of that window worth in dollars, and what has to be true for the $3,000 figure to hold? That is where the reporting goes quiet and the arithmetic has to take over.
The Evidence: An 11-Year Window Has a Unit Price
Start by converting the window into a per-year cost, because that is the decision a 62-year-old actually faces — not "should I convert eventually," but "should I convert this year."
If one skipped year costs about $3,000 and the window runs 11 years, the straight-line arithmetic on the 24/7 Wall St. figure implies roughly $33,000 of avoidable lifetime tax for someone who does nothing at all between 62 and 73. Spread the same $246,500 average balance across those 11 years instead and the pace works out to about $22,400 of conversions per year — not a dramatic, bracket-shattering maneuver, but a steady annual chore.
That framing reveals the thing the headline number hides. The $3,000 is not a penalty for being late. It is the price of a filled tax bracket you failed to use. Low-income years between retirement and RMDs are a consumable resource: unused bracket space does not roll over. A 62-year-old with modest income has room in the lower brackets this year, and if they don't fill it, that room expires on December 31 the same way an unused vacation day does.
The research is explicit about why the back end hurts. Marginal tax rates can jump by 10 to 12 percentage points once Social Security and RMDs are fully phased in. That's the mechanism: income the retiree controls in their sixties becomes income the IRS schedules for them in their seventies. Vanguard's cohort data supplies the balance side of the picture — the $246,500 average for the 60-to-64 group — while the IRS supplies the deadline. Neither source tells the story alone. Put them together and the window isn't a planning nicety; it's a depreciating asset.
What It Means: The Brackets, Not the Balance
Here is the non-obvious part. The conventional pitch for a Roth conversion is tax-free growth — pay tax now, let the money compound untaxed, withdraw untaxed later. True, and nice. But for a 62-year-old, growth is not the dominant variable. Time is short enough that compounding has limited room to work. The dominant variable is rate arbitrage: paying a low rate today instead of a higher rate at 73, plus the fact that Roth accounts carry no RMD obligation at all, which keeps future taxable income from being force-fed back onto the return.
The market context sharpens it. Current federal individual rates are scheduled to sunset in 2026, which — per the research — would raise marginal rates and make earlier conversions comparatively more attractive. That's a cited scheduled change, not a forecast about where markets go.
Chart: Straight-line arithmetic applied to the ~$3,000-per-year figure reported by 24/7 Wall St., across an 11-year window running from roughly age 62 to the IRS RMD age of 73. Illustrative only — actual outcomes depend on bracket position, state tax, and balance.
Our read on the chart: the slope matters more than the endpoint. A retiree who converts in six of eleven years captures most of the benefit, because the value sits in repetition, not perfection. This is the same structural logic Smart Credit AI applied to balance-transfer windows — a fixed-length, zero-cost period is only worth what you actually push through it before it closes.
Where a Careful Skeptic Pushes Back
Three objections deserve a straight answer.
First, $3,000 a year is an average applied to an average balance, and almost nobody is average. A retiree with a large pension may already be sitting in a high bracket at 62, in which case converting adds tax at today's rate with no arbitrage to harvest. The $246,500 figure is a cohort midpoint, not a personal plan.
Second, conversions are taxable in the year you make them — that is the main disadvantage of converting to a Roth IRA, and it is not trivial. The bill comes due in April, and paying it from the converted funds themselves eats the very balance you were trying to protect.
Third, a conversion raises your reported income for that year, which can ripple into Medicare premium surcharges and the taxability of Social Security benefits. Those second-order effects are exactly why a blanket "convert as much as possible" rule is worse than a bracket-aware one.
How to Act on This
The fix is not a one-time heroic decision. It's a habit — the same unglamorous mechanism that builds an investment portfolio in the first place.
The right annual number is whatever fills your current bracket without spilling into the next one. Work backward from the ceiling, not forward from the balance. That is the entire game, and it is why financial planning here is subtraction, not ambition.
By late in the year your actual income is largely known, which is when the bracket math is reliable. Put it on the calendar once and repeat it annually until 73. Automate the reminder and let the system beat willpower.
Using taxable savings to cover the bill preserves the full converted balance inside the Roth. Modeling tools — including the AI investing tools now bundled into most major brokerage dashboards — can project the bracket impact in minutes, though a credentialed tax professional should confirm anything irreversible.
Frequently Asked Questions
Should I do a Roth conversion at age 62, or wait until I stop working entirely?
The research frames ages 62 to 73 as the window precisely because income is often at its lowest then — before Social Security and RMDs push it up. If you are still earning a full salary at 62, the arbitrage is weaker; the case strengthens the year your earned income drops.
How much tax will I pay on a Roth conversion?
The converted amount is added to your ordinary income for that year and taxed at your marginal rate. There is no separate conversion tax. That is why the size of the conversion, not the decision to convert, determines the bill.
Is it too late to do a Roth conversion at 65?
No. Under current IRS rules, RMDs begin at 73, so a 65-year-old still has roughly eight years of window left — fewer than the full 11, but the per-year logic is unchanged.
Bottom Line
The goal is not a bigger Roth balance. The goal is a smaller lifetime tax bill, and the 11-year gap between retirement and age 73 is the only period most retirees fully control both sides of. On balance, our analysis is that the headline $3,000 understates the risk of inaction for anyone whose income will jump 10 to 12 percentage points in marginal rate at 73, and overstates it for high-pension households already sitting near the top of their bracket. The honest answer is that this is a personal finance question with a personal answer — but the window closes on a schedule the IRS published, and it does not negotiate.
Disclaimer: This article is editorial commentary for informational purposes only and does not constitute financial, tax, or investment advice. It reflects analysis of publicly reported data, not independent testing or individualized planning. Consult a qualified tax professional before making conversion decisions. Research based on publicly available sources current as of October 19, 2026.