Converting IRA To Roth After Age 72

You can convert a traditional IRA to Roth after age 72. The question is whether you should, and under what conditions the numbers actually work in your favor. This page answers that specific question: what changes at 72, what the IRS allows, and where the real traps are.

What Changes at 72 (and Why It Complicates the Conversion)

Before 72, a Roth conversion is straightforward. You move money from a pre-tax account to Roth, pay ordinary income tax on the amount converted, and the future growth is tax-free. Simple enough.

At 72, required minimum distributions enter the picture. The IRS requires you to withdraw a minimum amount from your traditional IRA each year, calculated using your account balance and a life-expectancy factor from IRS Publication 590-B. For 2026, the rules follow the SECURE 2.0 framework: RMDs begin at age 73 for anyone born between 1951 and 1959, and at age 75 for anyone born in 1960 or later. If you are already past your RMD start date, you are in RMD territory whether you feel like it or not.

Here is the rule that trips people up: you cannot convert your RMD. The IRS treats the RMD as the first dollars out of the account each year. You must take it as ordinary income before any conversion can happen. Only the dollars above your RMD amount are eligible for conversion. If your RMD is $40,000 and you want to convert $60,000, you take the $40,000 first, then convert the remaining $60,000. You cannot roll the $40,000 into Roth to sidestep the distribution.

This matters because it compresses your runway. Every year you wait is another year of RMDs drawing down the account, and each conversion adds to taxable income in a year when you are likely already recognizing income from Social Security, pensions, and the RMD itself.

The Rules, the Tradeoffs, and the Real Watchouts

The mechanics are legal and workable. The traps are in the stacking.

Bracket stacking. An RMD of $50,000, Social Security benefits that are 85% taxable, and a $40,000 Roth conversion can push a married couple well into the 22% or 24% bracket, possibly 32%. The conversion math only works if the tax you pay today is lower than the tax your heirs or future-you would pay on RMDs at a higher rate. That requires honest modeling, not optimism.

IRMAA surcharges. Medicare Part B and Part D premiums are tiered by income using a two-year lookback. A large conversion in 2026 can trigger IRMAA surcharges in 2028. For 2026, the IRMAA surcharges begin at modified adjusted gross income above $106,000 for single filers and $212,000 for married filing jointly. A single large conversion can cost a couple thousands of dollars in added Medicare premiums, which erodes the Roth benefit if you are not planning around it.

The 5-year rule. Each Roth conversion starts its own 5-year clock for penalty-free access to converted principal. If you are already 72 or older, the 10% early-withdrawal penalty is not your concern, but the 5-year clock still applies to earnings. More practically, if you are converting primarily to reduce the taxable estate you pass to heirs, the clock matters for how quickly they can access those funds.

State taxes. Do not model this on federal brackets alone. Some states tax IRA distributions; some exempt them entirely. The net tax rate on a conversion in a state like California looks different than in Florida.

What makes a post-72 conversion genuinely worth doing: your tax rate now is lower than the rate your beneficiaries will face when they inherit a large pre-tax IRA and are required to empty it within 10 years under the SECURE Act rules. That is a real scenario for a lot of families, and it is where the conversion math often tilts positive.

An Illustrative Example

I want to walk through a scenario I see often, clearly labeled as illustrative.

A retired couple, both 74. Combined RMDs from their IRAs total $65,000 per year. Social Security adds another $42,000, of which $35,700 is taxable (85%). Their total income before any conversion is roughly $100,700. They are in the 22% federal bracket and still have room before hitting the first IRMAA threshold.

They have capacity to convert an additional $30,000 to $40,000 before crossing either the next bracket threshold or the IRMAA line. Over five years, that is $150,000 to $200,000 moved into Roth. Their traditional IRA balance drops, reducing future RMDs. Their heirs inherit a Roth IRA instead of a taxable one, with a 10-year window to draw it down tax-free.

The cost is real: they pay tax on the conversion now. The benefit is equally real: the account that was on course to generate a compounding tax problem for their children is smaller and, eventually, partially tax-free. The conversion does not need to eliminate the RMD problem to be worth doing. It just needs to pay off on a net present value basis, accounting for the IRMAA exposure and the bracket cost.

Whether that math clears the bar depends on their specific numbers. That is not a hedge. It is the honest answer.

How This Connects to Roth Conversion Strategy

This page covers one specific scenario inside a larger conversation about when Roth conversions make sense, how to think about bracket math, and the watchouts that determine whether they pay off. If you are earlier in the process and trying to understand the full picture for high earners and pre-retirees, the parent guide at /strategies/roth-conversion covers that ground.

In the language of the Sporos Doctrine, this work lives in the Soil layer of the plan: the tax architecture decisions made before withdrawal begins. A post-72 conversion is a pruning decision, removing future taxable growth from a pre-tax account before the RMD math compounds the problem further. My take is that it is most powerful when it is part of a multi-year plan, not a one-time move made under time pressure.

Frequently Asked Questions

Can I convert my RMD to a Roth IRA?

No. Your RMD must be taken as a taxable distribution first. It cannot be rolled over or converted. Only amounts above your annual RMD are eligible for conversion.

Does the 5-year rule apply to conversions done after age 72?

Yes, each conversion starts a 5-year clock for that converted amount's earnings. However, the 10% early withdrawal penalty does not apply after age 59½, so the practical impact at 72 or older is mainly about inherited Roth accounts and how quickly beneficiaries can access earnings tax-free.

Will a Roth conversion increase my Medicare premiums?

Possibly. IRMAA surcharges are based on MAGI from two years prior. A large conversion in 2026 could affect your 2028 premiums. This is a real cost that needs to be modeled into the conversion decision.

Are there income limits for Roth conversions after 72?

No income limits apply to Roth conversions regardless of age. Income limits apply to direct Roth IRA contributions, not conversions from a traditional IRA.

What if I have a Roth 401(k) from a former employer? Do RMD rules apply?

For plan years beginning after December 31, 2023, SECURE 2.0 eliminated RMDs from designated Roth accounts in employer plans during the account owner's lifetime. If you have a Roth 401(k), rolling it to a Roth IRA also avoids RMDs. This is a separate but related planning point worth reviewing.

Is a post-72 conversion ever clearly not worth doing?

Yes. If your current marginal rate equals or exceeds the rate your heirs will face, if IRMAA surcharges consume the savings, or if your estate is small enough that the tax complexity outweighs the benefit, conversion may not clear the bar. The point is not to convert. The point is to pay less tax in aggregate.

What to Do Next

Pull your most recent IRA statements and calculate your estimated RMD for the current year. This tells you how much room you have above the RMD for a potential conversion.
Run a rough MAGI estimate for the year, including Social Security, any pension income, and the RMD, to see where you sit relative to IRMAA thresholds and bracket ceilings.
If you have a sizeable pre-tax IRA and adult children who will inherit it, ask a fiduciary advisor to model the 10-year inherited IRA tax cost against the cost of converting now.
Review this in the context of your full Harvest-stage plan, not as a standalone decision.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Tax law changes frequently — verify current rules before acting. Consult with qualified professionals for guidance specific to your situation.