Why the years before RMDs can create a Roth-conversion window

Short answer: The period after employment income falls but before required minimum distributions begin can provide an opportunity to convert portions of tax-deferred accounts at a more manageable projected cost.

It is an opportunity to evaluate—not a mandate to convert. The value of the window depends on the household’s current income, future pensions and Social Security, account balances, tax rates, Medicare timing, state residence, survivor circumstances, liquidity, and legacy objectives.

What changes after retirement?

Employment income may stop before Social Security, pensions, and RMDs are fully underway. That can create several years in which reported income is lower than it was during the working years and lower than it may be later in retirement.

Those years can be used for retirement-account withdrawals, capital-gain realization, charitable planning, or Roth conversions. Because these choices compete for the same tax capacity, they should be evaluated together rather than scheduled independently.

How RMDs change the planning picture

The IRS currently states that owners of traditional IRAs, SEP IRAs, and SIMPLE IRAs generally must begin annual required distributions at age 73. Employer-plan rules can differ, particularly for someone who remains employed. The account owner is ultimately responsible for taking the correct amount.

RMDs generally enter taxable income except for any applicable after-tax basis. Larger tax-deferred balances can therefore create larger future distributions. Those distributions may fill tax brackets, influence Medicare IRMAA, affect how Social Security benefits are taxed, and leave less room for other income decisions.

A required distribution cannot be converted

Required minimum distributions are not eligible rollover distributions. Once RMDs apply, the required amount generally must be distributed before additional eligible amounts are converted or rolled over. A person may still evaluate a Roth conversion beyond the required distribution, but the RMD itself cannot simply be moved into the Roth account.

This is one reason the years before RMDs can provide more flexibility: the household can decide how much income to recognize without first having a required amount occupy part of the year’s tax picture.

Partial conversions can reshape—not erase—the future

A conversion reduces the traditional account and increases the Roth account, subject to taxes and market results. Because Roth IRA owners are not required to take lifetime RMDs under current rules, measured conversions may reduce future required-distribution pressure and provide another source of retirement income.

However, converting too much too quickly can produce avoidable current tax, Medicare, or liquidity costs. Converting too little may leave the projected future problem largely unchanged. The useful question is not whether a conversion reduces an RMD—it generally can—but whether the cumulative after-tax outcome improves enough to justify the current cost.

Remember the surviving spouse

After the first spouse dies, the survivor may eventually report similar income on a single tax return rather than a joint return. Pension changes, Social Security survivor rules, account ownership, and inherited assets can compress the survivor’s tax picture. Roth assets can provide spending flexibility during that transition, though beneficiary and estate objectives should also be reviewed.

A conversion analysis that ends with the joint lifetime can miss this risk. At minimum, the projection should compare both spouses’ joint years, the survivor period, and the expected treatment of assets left to heirs.

Build a conversion calendar

1. Map the years between retirement and projected RMDs.
2. Add Social Security start dates, pensions, deferred compensation, property sales, and other income events.
3. Estimate future tax-deferred balances under reasonable—not guaranteed—return assumptions.
4. Test partial conversions in several years rather than relying on one large transaction.
5. Include IRMAA, state taxation, survivor filing status, tax-payment liquidity, and legacy goals.
6. Review the calendar annually with the relevant financial and tax professionals.

Continue with How much should you convert to Roth each year? or use the interactive questions on our RMD and Roth conversion planning page.