Should You Do a Roth Conversion in Retirement? The Answer Depends on Timing, Taxes, and Your Legacy Goals

Roth conversions can be one of the most powerful retirement tax-planning tools available, but they are also one of the easiest strategies to misuse. The idea sounds simple: move money from a traditional IRA or pre-tax retirement account into a Roth IRA, pay the tax now, and allow the money to grow tax-free in the future. But the real question is not, “Are Roth conversions good?” The real question is, “Are Roth conversions good for you, in this year, at this tax rate, given your age, income, assets, health, capital gains, Medicare situation, and estate goals?” The outline for this article focuses on that exact issue: Roth conversions can reduce future required minimum distributions and create tax-free assets for heirs, but timing, capital gains, RMDs, IRMAA, and personal circumstances matter enormously.

The first factor is age. Roth conversions tend to be most attractive in the years after retirement but before required minimum distributions begin. That window often opens when someone retires in their early or mid-60s and has lower taxable income than they did during their working years. If income drops, there may be room to convert pre-tax retirement money at a lower tax rate than the retiree might face later. The outline emphasizes ages 62 to 67 as a common planning window, especially for people with substantial assets and manageable tax exposure.

That timing matters because required minimum distributions can change the tax picture later. The IRS says traditional IRA owners generally must begin taking required minimum distributions at age 73, and the first RMD from an IRA is due by April 1 of the year after reaching age 73. Once RMDs begin, the government forces money out of pre-tax retirement accounts every year, whether you need the income or not. Those withdrawals are generally taxed as ordinary income. If the account is large, RMDs can push retirees into higher tax brackets, increase taxes on Social Security, and potentially trigger higher Medicare premiums.

That is why converting before RMDs can be useful. If you move some money from a traditional IRA into a Roth IRA before RMD age, you may reduce future RMDs because Roth IRAs are not subject to lifetime RMDs for the original owner. You also create a pool of tax-free money that can be used later with more flexibility. For retirees who do not need the converted money for spending, this can be especially valuable because the Roth account may continue compounding for the rest of their life and potentially benefit heirs.

But Roth conversions become less obvious as you get older. The outline notes that at age 70 to 72, conversions may still make sense, but beyond that, the benefit can become less compelling unless there are strong estate or tax reasons. That does not mean someone over 72 should never convert. It means the math has to be more precise. If you are already taking RMDs, have a shorter planning horizon, or would need to pay the conversion tax from the retirement account itself, the benefit may be reduced.

The second factor is your current and future tax bracket. A Roth conversion is taxable in the year it happens. The IRS says amounts converted from a traditional, SEP, or SIMPLE IRA to a Roth IRA are reported on Form 8606. If you convert $100,000, that $100,000 generally increases taxable income for the year. The key question is whether you are paying tax now at a lower rate than you or your heirs would likely pay later.

For many retirees, the sweet spot is converting enough to fill up the 22% or 24% federal bracket without spilling too much into higher brackets. That is not a universal rule, but it is a common framework. The outline includes an example where future tax brackets could rise from 22% or 24% into 32% territory if RMDs, widowhood, or other income changes occur. In that situation, paying tax now at a lower rate may be better than being forced to pay more later.

Widowhood is one of the most overlooked tax risks in retirement. When one spouse dies, the surviving spouse may eventually file as a single taxpayer. The income may not fall by half, but the tax brackets become much less favorable. A surviving spouse can have similar RMDs, Social Security income, pension income, dividends, and interest, but with single-filer brackets. That can push the survivor into higher tax rates. Roth conversions during the couple’s joint-filing years may help reduce that future tax burden.

The third factor is how you will pay the tax. Ideally, taxes on a Roth conversion are paid from taxable cash or other non-retirement assets. That allows the full converted amount to move into the Roth and continue growing tax-free. If you have to withhold taxes from the IRA conversion itself, you reduce the amount that lands in the Roth, and the strategy may become less efficient.

That does not mean you can never pay conversion taxes from retirement assets, but it changes the equation. The conversion has to overcome the cost of accelerating tax and reducing investable assets. For someone with large taxable accounts or significant cash reserves, the strategy is often easier to justify. For someone who needs every dollar for living expenses, a large conversion may not make sense.

The fourth factor is capital gains. Some retirees have large taxable brokerage accounts with highly appreciated investments. That creates a planning challenge. If you sell appreciated stocks to raise cash to pay Roth conversion taxes, you may trigger capital gains taxes. The outline specifically warns that investments with 150% or more in capital gains can create a large tax bill if sold to fund conversions.

That does not mean you should avoid conversions entirely. It means you need to decide which assets to sell, when to sell them, and whether there are lower-gain lots available. Selling the most recently purchased shares with smaller gains may reduce the tax hit. Tax loss harvesting may also help if you have positions that are down. In some cases, retirees may intentionally realize gains in low-income years, especially if they can do so at favorable long-term capital gains rates. The IRS notes that long-term capital gains can be taxed at 0%, 15%, or 20% depending on taxable income and the type of asset.

This is why Roth conversion planning should not be separated from portfolio management. You may need to rebalance, diversify concentrated positions, manage capital gains, harvest losses, and coordinate taxable income in the same year. The best strategy is rarely just “convert as much as possible.” It is usually “convert the right amount while managing the rest of the tax picture.”

The fifth factor is Medicare. Roth conversions can increase modified adjusted gross income, and that can trigger IRMAA, the income-related monthly adjustment amount on Medicare Part B and Part D premiums. This often surprises retirees. A conversion done at age 63 can affect Medicare premiums at age 65 because Medicare looks back two years at income. The outline specifically warns that conversion planning should consider age 63 and later because of IRMAA.

This does not mean you should avoid conversions just because of IRMAA. Sometimes paying a Medicare surcharge for a year or two is worth it if the long-term tax savings are meaningful. But it needs to be included in the calculation. A Roth conversion that looks smart from an income-tax perspective may be less attractive once Medicare surcharges are added.

The sixth factor is estate planning. Roth conversions can be especially valuable for people who do not expect to spend all their retirement assets and want to leave money to children or grandchildren. A traditional IRA inherited by adult children can create taxable income for them, often during their peak earning years. A Roth IRA inherited by heirs may still be subject to distribution rules, but qualified withdrawals are generally tax-free. That can make Roth assets a powerful legacy tool.

The outline emphasizes that if retirees do not need the funds, converting can help maximize tax-free growth for heirs, including grandchildren. This matters because the benefit of a Roth conversion may extend beyond your lifetime. If you convert at 65, live into your 90s, and then heirs have additional years to distribute the inherited Roth, the tax-free growth period can be very long. That makes early conversions more attractive for families with strong longevity and legacy goals.

However, estate planning also introduces more advanced options. The outline mentions charitable remainder trusts, tax-exempt trusts, large charitable deductions, lifetime gifts, and other strategies for high-net-worth households. These tools can be powerful, but they are not do-it-yourself strategies. They require legal, tax, and financial coordination. The right answer depends on whether the goal is reducing taxes, providing lifetime income, giving to charity, supporting heirs, or all of the above.

The seventh factor is life expectancy and health. Roth conversions require paying taxes now for a future benefit. If someone has a short life expectancy and no strong estate goal, the math may not work. If someone expects to live 20, 25, or 30 more years, the Roth has more time to compound. The outline notes that for people age 65 and older, planning for the possibility of living into the 90s can influence the conversion decision.

This is uncomfortable but important. Retirement planning is not just about averages. It is about probabilities. If you are healthy, have longevity in your family, and do not need the money right away, Roth conversions may be more attractive. If health is poor and the assets will be spent soon, the benefit may be smaller.

The eighth factor is withdrawal strategy. A strong retirement income plan coordinates taxable accounts, traditional retirement accounts, Roth accounts, pensions, Social Security, rental income, interest, dividends, and capital gains. Roth conversions are just one piece of that plan. If most of your retirement money is pre-tax, future RMDs may become a tax problem. If most of your money is already in taxable accounts with favorable capital gains treatment, the strategy may look different. If you have large cash reserves, you may have more flexibility.

The outline includes examples of retirees with pensions, Social Security, rental income, retirement accounts, taxable accounts, cash, dividends, and interest income. It highlights the importance of working backward from future income needs and tax brackets rather than making one-off decisions. That is the right way to think about it. A Roth conversion should solve a specific problem. Maybe the problem is future RMDs. Maybe it is a surviving spouse’s tax bracket. Maybe it is estate taxes. Maybe it is heirs inheriting taxable income. Maybe it is too much money concentrated in pre-tax accounts.

The ninth factor is risk management. Some retirees become so focused on taxes that they forget the investment side. If you have a taxable account with huge unrealized gains, a Roth conversion strategy may also be an opportunity to evaluate diversification. Concentrated positions can create wealth, but they can also create risk. Tax concerns should not force you to hold an investment forever if it no longer fits your plan.

Tax loss harvesting, charitable giving, donor-advised funds, exchange funds, and careful lot selection may all help manage concentrated gains. But again, the plan has to be personalized. The outline repeatedly emphasizes that age, health, income sources, investment gains, estate goals, and risk tolerance all matter.

So how should retirees approach the decision?

Start with a multi-year tax projection. Look at income today, expected Social Security, pensions, dividends, interest, capital gains, RMDs, and possible widowhood. Then estimate what tax bracket you may be in later. Next, identify the years before RMDs when income may be lower. Those may be the best years for Roth conversions.

Then decide how much to convert. This may mean filling up a specific bracket, such as the 22% or 24% bracket. It may mean converting enough to reduce future RMDs without triggering too much IRMAA. It may mean doing smaller annual conversions rather than one large conversion. It may also mean skipping conversions in years when you sell a major asset, realize a large capital gain, or have unusual income.

Finally, revisit the plan every year. Tax laws change. Markets change. Account balances change. Health changes. Spending needs change. A Roth conversion plan created at 62 may need to be adjusted at 66, 70, or 73.

The best Roth conversion strategy is not about chasing a trendy tax move. It is about controlling your future taxable income, preserving flexibility, and deciding who should pay the tax: you now, you later, your surviving spouse, or your heirs. Sometimes paying tax today can save money over the long run. Sometimes it cannot. The only way to know is to run the numbers.

Roth conversions can be powerful, especially in the years before RMDs begin. But they are not automatically right for everyone. The right answer depends on timing, tax brackets, capital gains, Medicare premiums, health, cash flow, and legacy goals. Done carefully, a Roth conversion can reduce future tax pressure and create tax-free wealth. Done carelessly, it can create unnecessary taxes, Medicare surcharges, and liquidity problems. Retirement tax planning is not about making the biggest move. It is about making the smartest one.

Intended for educational purposes only. Opinions expressed are not intended as investment advice or to predict future performance. Past performance does not guarantee future results. Neither the information presented, nor any opinion expressed constitutes a solicitation for the purchase or sale of any security. Consult your financial professional before making any investment decisions. Opinions expressed are subject to change without notice.

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• Opinions expressed are subject to change without notice and are not intended as investment advice or to predict future performance.

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• Intended for educational purposes only and are not intended as individualized advice or a guarantee that you will achieve a desired result. Before implementing any strategies discussed you should consult your tax and financial advisors.