The Internal Revenue Code has undergone many revisions since the first IRA appeared in 1974. A Roth conversion offers a legal method to change the tax status of retirement savings.
This process moves money from a pre-tax traditional account to a post-tax Roth account. The converted amount is taxed as ordinary income in the year of the transfer. Once the money resides in the Roth account, it grows tax free and withdrawals are tax free in retirement.
This strategy appeals to retirees who find themselves in a lower tax bracket than they expect to be in later life. It requires careful planning to avoid pushing income into higher tax brackets.
The Mechanics of a Conversion
A Roth conversion is not a rollover and it is not a contribution. It is a taxable distribution from a traditional IRA, SEP, or SIMPLE IRA that is deposited into a Roth IRA within 60 days.
The IRS treats the converted amount as ordinary income. Retirees must report this sum on Form 1040 and Form 8606. There is no penalty for this transfer if the account owner is over age 59 and a half.
People who have made non-deductible contributions to traditional IRAs must follow the pro-rata rule. This rule states that one cannot convert only the after-tax money. Instead, the conversion consists of a mix of pre-tax and after-tax funds based on the total ratio of all IRA assets.
This prevents savers from shielding taxable money from the IRS.
Managing the Tax Bill
The primary cost of a conversion is the income tax due on the pre-tax funds. The goal is to pay this tax at a rate lower than what would apply later. For the 2024 tax year, the 12 percent bracket ends at $89,450 for married couples filing jointly.
The 22 percent bracket ends at $190,750. A retiree might convert enough money to fill the 12 percent bracket without spilling over into the 22 percent bracket. This approach maximizes the amount moved at the lowest possible rate.
Taxes owed on the conversion can be paid from funds outside the IRA. Paying from outside cash preserves the retirement balance and allows the full converted sum to grow tax free.
Paying taxes from the IRA itself reduces the principal and defeats part of the purpose.
The Retirement Gap Window
There is a specific period in life that is ideal for these conversions. This window often opens after a career ends but before Required Minimum Distributions begin. The SECURE 2.0 Act of 2022 raised the RMD starting age to 73 for people born between 1951 and 1959.
From age 60 to 73, many retirees have lower taxable income because they are no longer earning a salary. They might delay claiming Social Security until age 70 to maximize the benefit.
This creates a low-income gap. Converting funds during these years fills the tax brackets efficiently. Once RMDs start at age 73, taxable income increases significantly. Converting large sums after RMDs begin often pushes retirees into much higher tax brackets and triggers other surcharges.
The Impact on Medicare Premiums
Retirees must consider how a conversion affects Medicare costs. The government uses Modified Adjusted Gross Income from two years prior to determine Part B and Part D premiums.
This is known as the Income Related Monthly Adjustment Amount, or IRMAA. In 2024, the standard Part B premium is $174.70 per month. However, single filers with income above $103,000 and joint filers above $206,000 pay surcharges.
These surcharges can add hundreds of dollars to monthly bills. A large Roth conversion in 2024 could increase Medicare premiums in 2026. Financial planners often model these costs to ensure the tax savings from the conversion outweigh the higher Medicare payments over time.
Benefits for Heirs
Roth conversions offer distinct advantages for estate planning. The SECURE Act of 2019 ended the stretch IRA for most non-spouse beneficiaries. Heirs must now empty inherited retirement accounts within 10 years.
This rule can force children to take large taxable distributions during their peak earning years. If the money is in a Roth IRA, the withdrawals are tax free to the beneficiary.
This allows the entire balance to compound for the full 10 years without tax erosion. It provides a tax efficient legacy for loved ones. The account must have been open for five years before the tax free benefit applies to earnings, so starting conversions well before death is a prudent step.
Traditional IRA vs. Roth IRA Comparison
| Feature | Traditional IRA | Roth IRA |
|---|---|---|
| Contributions | Pre-tax or deductable | After-tax (no deduction) |
| Growth | Tax deferred | Tax free |
| Withdrawals | Taxed as income | Tax free |
| RMDs | Required starting at 73 | None during owner's lifetime |
| Estate Planning | Taxable to heirs | Tax free to heirs |
A Roth conversion is a tool, not a guarantee. It requires a clear view of current tax rates and future income. Retirees should calculate their marginal tax rate and compare it to expected future rates.
They must also watch out for the IRMAA cliffs that increase Medicare costs. The math often favors converting at least some funds during the low income years of early retirement.
This strategy buys tax freedom for the rest of one's life and for the next generation. It is a dignified way to manage the inevitable duties of citizenship while preserving family wealth.
Sources
- Internal Revenue Service, 'Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs),' (2023)
- Congressional Research Service, 'The SECURE Act and Retirement Savings,' (2022)
- Centers for Medicare && Medicaid Services, 'Medicare Part B Income-Related Monthly Adjustment Amount,' (2024)
- Investment Company Institute, 'The U.S. Retirement Market, 2023,' (2024)