Roth conversions require careful timing to avoid high tax costs

Roth conversions allow individuals to move funds from traditional retirement accounts to Roth IRAs to benefit from tax-free gains and avoid required minimum distributions. However, these conversions are taxable events that can significantly impact a person's financial situation depending on timing and current income.

Performing a conversion while still earning a high salary can push taxpayers into higher marginal tax brackets, increasing the total cost of the conversion. Additionally, increased taxable income can lead to higher taxes on Social Security benefits and trigger surcharges on Medicare Part B premiums, known as Income-Related Monthly Adjustment Amounts (IRMAAs).

Financial experts suggest that the most cost-effective time for conversions may be during the ‘tax valley’—the period after retirement income drops but before Social Security and required minimum distributions begin. Converting during this window can result in a much lower tax rate compared to converting while still receiving a full salary.