The Tax Window Between 62 and 73 That Most Retirees Waste
A $400,000 IRA can be converted at roughly $35,000 a year in the 12% bracket between 62 and 73. Do nothing, and the same money can be taxed at 22% after RMDs start.
A retiree with $400,000 in a traditional IRA can convert roughly $35,000 a year between ages 62 and 73 while staying inside the 12% federal bracket, but most convert nothing and face 22% on withdrawals once required minimum distributions begin at 73, according to 24/7 Wall St.
There is a stretch of years in most retirements when taxable income falls to its lowest point of a lifetime. Wages have stopped. Required withdrawals from retirement accounts have not started. For a retiree who leaves work at 62 and does not face a forced distribution until 73, that gap runs for more than a decade — and for many people it is the only period in which they will ever have real control over their own tax rate.
The arithmetic is unglamorous but unusually clear. As 24/7 Wall St lays it out, a retiree holding $400,000 in a traditional IRA can move roughly $35,000 a year into a Roth account across that window while staying inside the 12% federal bracket. The alternative — the choice most people make by default — is to convert nothing, let the balance keep compounding, and then meet withdrawals at 73 taxed at 22%.
What a Roth conversion actually does
A traditional IRA is money the government has not taxed yet. Contributions went in before tax; every dollar that comes out later is ordinary income. A Roth IRA is the reverse: tax is paid on the way in, and qualified withdrawals come out untaxed, with no required minimum distributions for the original owner.
A conversion is simply the act of moving money from the first bucket to the second and paying the income tax on the amount moved in the year you move it. Nothing is withdrawn for spending. The account owner is choosing to settle the tax bill early, at a rate they can see, rather than late, at a rate set by future law, future account growth and future income.
The reason the 62-to-73 window matters is that this is usually when the visible rate is lowest. Earned income is gone. Social Security may not have been claimed yet, or may be claimed at a reduced level. There is room at the bottom of the bracket structure that will never exist again once required distributions and full benefits stack on top of each other.
The gap between 12% and 22% is the whole story
Two rates carry the entire argument: 12% during the window, 22% after it. On the same dollar of IRA money, one path costs less than half of what the other costs. That is a difference no investment decision inside the account — fund selection, allocation, timing the market — is likely to replicate reliably.
Consider the illustrative case in the numbers above. Converting about $35,000 a year at 12% carries roughly $4,200 of federal tax in that year, on an illustrative basis. Left alone and later withdrawn at 22%, the same $35,000 would carry about $7,700 — a difference of roughly $3,500 on that single slice, before any account growth is counted. Over eleven years of window, converting about $35,000 annually accounts for roughly $385,000 of the $400,000 balance, which is the point: the window is long enough to drain almost the entire pre-tax account at the lower rate, if it is used from the start.
These figures are illustrative arithmetic on the rates and amounts cited, not a personal tax projection. Real outcomes turn on filing status, standard deduction, state income tax, capital gains and dividends, Social Security taxation and how much of the bracket is already occupied. But the direction of the result does not change, and that is the useful part.
Why the default is inaction
Nobody sets out to hand the IRS the larger check. Inaction wins because paying tax voluntarily, years before it is due, feels like a loss. The bill for the conversion is a real cash outflow in the current year. The saving is diffuse, arrives later, and never appears on a statement as a line item.
Several other forces push the same way:
- Loss aversion in cash terms. Writing a check to cover the tax on a conversion is concrete. The 22% avoided at 73 is hypothetical until it isn't.
- Growth cuts both ways. Leaving the balance in the traditional IRA compounds the future tax base as well as the asset. A larger account at 73 means larger required distributions.
- Bracket creep from stacking. Once required distributions, Social Security and any pension arrive in the same year, the marginal rate is no longer a choice.
- Advice timing. The window opens at the exact moment many people stop having regular contact with a workplace plan or an adviser.
Inaction wins because paying tax voluntarily, years before it is due, feels like a loss.
There is also a sequencing trap. A retiree who converts nothing for the first several years of the window and then tries to catch up has to push far larger amounts through in fewer years, which is precisely how a conversion strategy pushes income out of the 12% bracket and into the higher one it was designed to avoid. The value of the window is a function of how early it is used.
Who this changes the math for
The case is strongest for retirees who expect their taxable income to be higher later than it is now — which describes anyone with a substantial pre-tax balance, a delayed Social Security claim, or a pension that starts mid-retirement. It is also strong for people whose priority is what heirs receive rather than what they spend: a Roth passed to a beneficiary carries no income tax on qualified withdrawals, while an inherited traditional IRA arrives with the tax bill attached.
The case is weaker for retirees whose income is already high enough that the 12% bracket is not available, for those who would have to sell taxable investments at a gain to pay the conversion tax, and for anyone whose charitable plans would let pre-tax money leave the IRA without income tax at all.
What to watch over the window
The practical discipline is annual, not one-time. Each year between 62 and 73, the question is how much room is left at the top of the 12% bracket after all other income is counted, and then converting up to that line and no further. Two secondary tripwires deserve attention: Medicare premium surcharges keyed to income, which can be triggered by a conversion in a specific year, and the interaction between conversion income and how much of a Social Security benefit becomes taxable.
None of this requires a market view. On Friday, the S&P 500 tracker (NYSEARCA: SPY) closed at $769.35, down 0.23% on the day, with the Nasdaq 100 fund (NASDAQ: QQQ) at $716.43 and the Dow tracker (NYSEARCA: DIA) at $535.06. Whether those numbers rise or fall over the next eleven years changes the size of the account, not the logic of converting at 12% instead of 22%. If anything, strong markets strengthen the case: the bigger the traditional IRA grows, the bigger the forced withdrawal at 73 and the harder it becomes to keep any of it in the lower bracket.
Frequently asked questions
What is a Roth conversion?
A Roth conversion moves money from a traditional IRA, which has never been taxed, into a Roth IRA. You pay ordinary income tax on the converted amount in the year of the conversion. In exchange, qualified withdrawals later come out tax free and the original owner faces no required minimum distributions on the Roth account.
Why does the window between 62 and 73 matter?
Those years are often when taxable income is at its lifetime low. Wages have stopped, and required minimum distributions from retirement accounts do not begin until 73. That leaves unused room in the lower tax brackets. Once forced withdrawals and Social Security stack together, the marginal rate is no longer something the retiree controls.
How much can a $400,000 IRA holder convert each year?
In the example cited, roughly $35,000 a year can be converted while staying inside the 12% federal bracket. The actual figure depends on filing status, the standard deduction, other income and state tax, so the amount that fits under the top of the bracket has to be recalculated every year.
What happens if a retiree converts nothing?
The traditional IRA keeps growing untaxed until age 73, when required minimum distributions begin. At that point withdrawals are ordinary income, and in the case described they are taxed at 22% rather than 12%. Because the balance has grown, the taxable base is also larger than it was during the window.
Does a Roth conversion help heirs?
Generally yes. A Roth IRA passed to a beneficiary delivers qualified withdrawals free of income tax. An inherited traditional IRA arrives with the deferred tax bill still attached, and the beneficiary pays ordinary income tax at their own rate, which may be higher if they are still working.
Are there downsides to converting?
Yes. The tax is due in the conversion year, which means finding cash to pay it. A large conversion can also push income high enough to trigger Medicare premium surcharges and increase the taxable share of a Social Security benefit. Converting too much in one year can also spill income into a higher bracket.
Sources
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