When a Roth Conversion Might Not Make Sense

While Roth conversions are often touted as a silver bullet for retirement tax planning, they are not a no-brainer nor are they right for everyone. While converting pre-tax assets can be a prudent strategy to reduce lifelong taxes, it can just as easily backfire and erode your after-tax wealth if done improperly.

Here are several key scenarios where you should pause and evaluate whether a Roth conversion actually aligns with your broader financial goals.

1. Triggering the ACA Health Insurance Tax Cliff

If you retire early and plan to purchase health insurance through the Affordable Care Act (ACA) marketplace, a Roth conversion can severely impact your healthcare costs.

ACA premium tax credits and subsidies are based entirely on income, not assets. It doesn't matter how much you have saved in your portfolio; what matters is your Modified Adjusted Gross Income (MAGI) for the year. If a Roth conversion artificially inflates your income past the subsidy threshold (400% of the federal poverty line), you hit a strict tax cliff. A single extra dollar of conversion income could cost you thousands of dollars in lost subsidies and clawed-back tax credits.

If keeping healthcare expenses low in early retirement is part of your strategy, make sure the math makes sense before accelerating income into a higher tax bracket.

2. Wasting Lower Tax Brackets in Retirement

There is a common misconception that "tax-free retirement is always better, no matter what." While having tax-free income feels good, converting all your pre-tax assets to a Roth account can actually leave you with less overall wealth.

When evaluating pre-tax versus Roth, the primary factor is your comparative tax rates now versus in the future:

• Tax Bracket Spikes: Converting a large IRA or 401(k) in a short period coult push your income into substantially higher tax brackets today (e.g., 24%, 32%, or higher).

• Unused Standard Deductions & Lower Brackets: If all your assets are converted to Roth and your only other income source is Social Security, you will effectively waste the 0%, 10%, and 12% marginal tax brackets throughout your retirement years.

• Medicare Surcharges (IRMAA): Accelerating income into a single year can significantly raise your Medicare Part B and Part D premiums two years later due to Income-Related Monthly Adjustment Amount (IRMAA) surcharges.

3. Overestimating Future RMDs & Unrealistic Assumptions

Projections showing massive Required Minimum Distributions (RMDs) often rely on strict assumptions that don't reflect real-world retiree behavior:

• Dynamic Spending Patterns: As retirees age, spending often increases in early retirement for travel and experiences, then tapers off in later years.

• Portfolio Risk Reduction: Most portfolios shift toward lower-risk, lower-yield investments over time, resulting in lower capital accumulation than a static, high-growth projection assumes.

If you spend more in your early retirement years, RMDs in your late 70s and 80s are far less likely to cause a tax emergency. Huge RMDs are often a "luxury problem"one that shouldn't keep you from enjoying your wealth during your healthiest retirement years.

4. Legacy Planning vs. Personal Lifetime Goals

Under current rules following the SECURE Act, non-spouse beneficiaries who inherit a traditional IRA generally must withdraw all funds within 10 years. For adult children inheriting accounts in their peak earning years (e.g., age 50 to 60), this can create a heavy tax burden.

Converting IRA funds during your retirement can be a valuable legacy strategy to protect your heirs from high tax brackets. However, it's important to distinguish whether a conversion benefits your financial life or primarily serves as an estate planning gift for the next generation.

Key Takeaways

Before executing a Roth conversion, examine the underlying assumptions:

• Does this plan rely on tax rates automatically rising in the future?

• Does it assume double-digit annual returns without adjusting for lower risk or increased spending later in life?

• Does it account for immediate impacts on ACA healthcare subsidies or Medicare premiums?

A Roth conversion provides certainty, you pay a known tax rate today to eliminate tax uncertainty tomorrow. But unless the numbers and personal assumptions align, pausing to re-evaluate may save you more in the long run.

The information in this blog is the opinion of Nathan Tomkiewicz and does not reflect the views of any other person or entity unless specified. The information provided is believed to be  reliable and obtained from reliable sources, but no liability is accepted for inaccuracies. The information provided is for informational purposes and should not be construed as advice. Advisory services offered through Tomkiewicz Wealth Management, LLC, an investment adviser registered with the State of New York and Massachusetts.