When Should You Not Do a Roth Conversion?

Executive Summary

‍A Roth conversion is not always the right move. You should generally avoid converting when you're in a higher tax bracket now than you expect to be in retirement, when you're under 59½ and don't have outside cash to cover the tax bill, or when you're near 70½ and plan to give to charity through Qualified Charitable Distributions. The right answer can change from year to year, so this isn't a one-and-done decision.

A Roth conversion moves money from a traditional IRA into a Roth IRA and triggers income tax on the amount converted. Done at the right time, it can reduce lifetime taxes and grow assets tax-free. Done at the wrong time, it can push you into a higher bracket, drain cash you need elsewhere, or work against your charitable giving strategy. At Oak Road Wealth Management, a fee-only fiduciary financial planning firm based in Lee's Summit, Missouri, serving clients nationally, we walk clients through this decision as part of their broader retirement tax planning.

Below are the three most common situations when a Roth conversion does not make sense — and why the decision is never really final.

When Should You Not Do a Roth Conversion?

You should not do a Roth conversion when your current marginal tax rate is higher than the rate you expect in retirement or in the future, when you can't pay the conversion tax without tapping the converted funds and you are under age 59½, or when you're close to age 70½ and plan on making large gifts to charities using Qualified Charitable Distributions (QCDs).

Each of these situations is common, and each one is worth understanding before you convert a single dollar.

Are You in a Higher Tax Bracket Now Than You Expect to Be in Retirement?

If your current tax bracket is higher than your expected tax bracket in retirement, a Roth conversion usually does not make sense.

The core math of a Roth conversion is simple: you pay tax now instead of later. That trade only pays off if your tax rate later would have been the same or higher. If you're in your peak earning years — say the 32% bracket — and you expect to drop to the 22% bracket once you retire and your income declines, converting now locks in tax at the higher rate. You'd be paying more in taxes than you'd owe if you simply left the money in the traditional IRA and paid tax on distributions later. In this case, waiting until you're in a lower bracket, such as the years between retirement and required minimum distributions, is usually the smarter window for converting.

Are You Under Age 59½ Without Cash Available to Pay the Conversion Tax?

If you're under 59½ and don't have outside cash to cover the tax bill, a Roth conversion often isn't a good idea.

A conversion is a taxable event, and that tax bill needs to be paid from somewhere. Ideally, it's paid with cash from a taxable account — not from the IRA itself. If you're under 59½ and choose to withhold taxes directly from the converted amount instead, you run into two problems. First, the withheld amount doesn't make it into the Roth IRA, so you convert less than intended. Second, and more importantly, that withheld amount is treated as an early distribution from the traditional IRA, which means it's subject to a 10% early withdrawal penalty on top of the income tax already due. Converting without the cash to pay the tax bill separately can turn a strategic move into an expensive mistake.

Are You 70½ or Close to It and Planning to Give to Charity Through QCDs?

If you're near or past 70½ and plan to use Qualified Charitable Distributions, converting may not make sense, since QCDs only work with pre-tax IRA dollars.

A Qualified Charitable Distribution lets you send money directly from a traditional IRA to a qualified charity, and that amount counts toward your required minimum distribution without being added to your taxable income. It's one of the most tax-efficient ways to give in retirement — but it only works with pre-tax traditional IRA funds, not Roth IRA funds. If you convert a large portion of your traditional IRA to a Roth before age 70½, you reduce the balance available for future QCDs and lose some of that giving flexibility. For clients who know charitable giving will be part of their retirement plan, this is a major factor to weigh before converting.

Is the Decision to Convert a One-Time Decision?

No. Whether to do a Roth conversion is not a one-time decision — it's a fluid choice you can revisit every year.

Just because a conversion doesn't make sense this year doesn't mean it won't make sense next year, or the year after. Income changes, tax brackets change, tax law changes, and your charitable and retirement goals evolve. A year with unusually low income — between jobs, in early retirement before Social Security starts, or after a business sale that's fully offset by deductions — can create a window where converting suddenly makes a lot of sense, even if it didn't the year before. The smartest approach isn't to decide once and move on. It's to reassess your tax situation annually and convert opportunistically when the numbers line up.

Frequently Asked Questions

What is the biggest reason not to do a Roth conversion?

The biggest reason is being in a higher tax bracket now than you expect to be in retirement. Converting means paying tax today, so if today's rate is higher than tomorrow's, you come out behind.

Can I withhold taxes from my Roth conversion instead of paying separately?

You can, but it's usually not a good option, especially if you're under 59½. Amounts withheld for taxes don't get converted to the Roth, and if you're under 59½, that withheld amount is treated as an early distribution subject to a 10% penalty.

Does a Roth conversion affect my ability to use Qualified Charitable Distributions?

Yes. QCDs can only be made from traditional IRA funds. If you convert a significant portion of your IRA to a Roth, especially near age 70½, you reduce the funds available for tax-efficient charitable giving through QCDs.

Should I decide once and for all whether to do Roth conversions?

No. The decision to convert should be revisited every year. Your income, tax bracket, and goals change over time, and a conversion that doesn't make sense today may make excellent sense in a future year with lower income.

How do I know if a Roth conversion makes sense for me?

The right answer depends on your current tax bracket, expected future tax bracket, available cash to pay the tax, and your charitable and estate planning goals. A fee-only fiduciary advisor can run the numbers for your specific situation each year to identify the best windows to convert.

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Oak Road Wealth Management is a fee-only fiduciary financial planning firm based in Lee's Summit, Missouri, serving clients nationwide. If you're weighing whether a Roth conversion makes sense for your tax situation, schedule a conversation with our team.

Written by Andrew Matz, Financial Planner at Oak Road Wealth Management.