How Do Roth Conversions Work? When Do Roth Conversions Work?

When Is The Best Time For A Roth Conversion?

One of the most compelling cases for a Roth conversion often appears in the years after full-time work ends but before RMDs begin.

Think about the typical retirement timeline. During primary working years, paychecks may keep taxable income elevated. Then retirement arrives, and wage income falls away. Social Security payments may not have started yet, pensions may be modest or nonexistent, and RMDs from traditional retirement accounts have not begun.

That gap may create a valuable planning window—an opportunity to convert a measured portion of a traditional IRA to a Roth IRA while remaining in a relatively favorable tax bracket. Doing so might reduce the size of future RMDs, build a pool of potentially tax-free money for later in retirement, and give a household more control over where it draws income in a given year.

That control may be more valuable than it sounds. Retirement doesn’t necessarily unfold in a straight line. One year may come with unusually high expenses, such as helping a child with a home purchase, replacing a car, embarking on a once-in-a-lifetime trip, or simply needing more income without accidentally landing in a higher tax bracket.

In some cases, a Roth bucket may offer flexibility when people need it most.

How Do Tax Rates Affect A Roth Conversion?

A conversion is fundamentally a tax-rate decision rather than an age decision.

Here’s the simple framework:

• When a current tax rate is likely lower than an expected tax rate in retirement, a Roth conversion is often considered more attractive.
• When a current tax rate is likely higher than an expected retirement tax rate, keeping money in traditional accounts may make more sense.
• If the two rates are close, building a mix of pre-tax, taxable, and Roth assets may help generate more options later.

Consider a fictional worker who plans to retire in 18 months. He earns about $114,000, has $1.6 million in a traditional 401(k), $200,000 in a taxable account, and $58,000 in Roth savings.

Though it may be tempting to assume he’s too close to retirement to make meaningful Roth decisions, proximity to retirement alone doesn’t rule out Roth planning. The large pre-tax balance is an important issue. If that money continues to grow, future RMDs may produce substantial taxable income. Adding some Roth assets now, or converting carefully after retirement, may give him more choices when those distributions begin.

The right answer may be different for each individual. In this situation, it depends on his filing status, deductions, Social Security timing, pension income, state taxes, spending needs, and how the conversion tax would be paid. Being a mere 18 months away from retirement may make the Roth conversation more urgent, but it doesn’t necessarily make it a nonstarter.

What Are The Risks Of A Roth Conversion?

A conversion adds ordinary income for the year, which may push a household into a higher marginal tax bracket. It may also affect the taxation of Social Security benefits, Medicare premiums, and state income taxes. Converting money from a traditional account often requires a plan for paying the resulting tax bill. For people already subject to RMDs, the year’s required distribution must generally be taken first; it cannot be converted to a Roth IRA.

In general, using money outside the retirement account to pay the tax may be more efficient than withholding it from the converted balance. Withholding reduces the amount converted, and the withheld amount may be treated as a taxable distribution that can trigger a 10% additional tax for people under 59½ unless an exception applies.

Conversions may not be fully available for immediate withdrawal. Each Roth conversion carries its own 5-year holding period, separate from the general Roth “forever” 5-year rule for earnings. Withdrawals may be subject to a 10% penalty for people under 59½ who have converted within the last 5 years.

For many, these potential pitfalls may make a deliberate, multiyear approach more attractive than an all-at-once conversion. Rather than converting a massive sum and hoping for the best, a retiree might decide to fill a selected tax bracket each year. Then, if need be, the strategy can typically be revisited annually as income, markets, tax laws, and family circumstances change.

How Can Three Tax Buckets Improve Retirement Flexibility?

It may help to visualize retirement assets in three tax buckets.

• Bucket #1: after-tax money—taxable brokerage accounts, savings, and money-market accounts. Tax has already been paid on the principal, though gains and income may still be taxable.
• Bucket #2: pre-tax money—traditional IRAs, 401(k)s, pensions, and similar accounts. Withdrawals are generally taxable, and large balances may eventually lead to substantial RMDs.
• Bucket #3: tax-free money—Roth IRAs and Roth 401(k)s, assuming the rules for qualified withdrawals have been met.

Having retirement funds across all three tax buckets may make retirement income planning more flexible. Instead of being forced to pull every dollar from a traditional IRA in a high-income year, retirees might be able to combine taxable assets, pre-tax withdrawals, and Roth distributions in a way that may more efficiently manage their tax bill.

That type of tax diversification may not sound glamorous, but having options may mean fewer difficult tradeoffs down the road.

How Do State Taxes Affect Roth Conversions?

Where someone lives now, and where they expect to live later, is often a relevant factor in the calculation.

Someone earning a high income in a high-tax state who expects to move to a lower-tax state in retirement may have a stronger case for traditional contributions today and Roth conversions later. By contrast, a household that expects to remain in a high-tax state may see more value in paying a known tax rate now to create future tax-free flexibility.

Again, that does not make the decision automatic. It simply means federal taxes are not the whole story.

Key Takeaways

For many, Roth conversions may be a valuable retirement tax-planning tool. But they aren’t a universal magic trick, regardless of whether or not tax rates may rise someday.

The most successful conversions tend to be targeted. They often take place during lower-income years, account for future RMDs and other income sources, consider state and Medicare consequences, and fit within a broader retirement-income plan.

Those approaching retirement with the majority of savings in traditional accounts may benefit from asking questions before RMDs arrive. The years between one’s final paycheck and first mandatory withdrawal may be among the more valuable planning years in a retirement.