A Plain-English Guide to Roth Conversions and How High Net Worth Families Can Use Them to Their Advantage
Key Takeaways
- A Roth conversion moves existing pre-tax retirement money into a Roth account
- Taxes are paid at the time of conversion, but future growth and withdrawals can be tax-free
- Roth conversions are most effective when done strategically and within a broader tax plan
Roth conversions are often discussed alongside Roth contributions, but they are two very distinct strategies. Understanding the difference can unlock powerful tax planning opportunities and potentially save significant amounts of taxes paid over a family’s lifetime.
What Is a Roth Conversion?
A Roth conversion is the process of:
- Moving money from a Traditional IRA, Traditional 401(k), other or pre-tax retirement account
- Into a Roth IRA
- And paying income tax on the amount converted in the year of conversion
Unlike Roth contributions, Roth conversions involve existing retirement assets, not additions of new savings.
Roth Conversion vs. Roth Contribution
These two terms are frequently confused:
- Roth contribution: New after-tax money added to a retirement account, subject to annual contribution limits and eligibility rules
- Roth conversion: Shifting existing pre-tax retirement funds into a Roth account, with no income limits or dollar caps on amounts converted
Why Would Someone Do a Roth Conversion?
Investors often consider Roth conversions when they:
- Expect to be in higher tax brackets later in life
- Want to reduce future taxes from required minimum distributions (RMDs) from Traditional IRAs and Traditional 401(k)s
- Are uncertain about what tax law and tax rate changes might occur in the future
- Experience years when income (and therefore their tax rates) are temporarily lower
Once converted, Roth assets grow tax-free, are not subject to RMDs during the original account owner’s lifetime, and can provide more flexibility in retirement tax planning.
Additionally, unlike inheriting Traditional IRAs or taxable accounts, Roth assets can be withdrawn and liquidated entirely tax‑free by the beneficiaries. This makes Roth accounts one of the most tax‑efficient assets for a beneficiary to inherit, which can be especially helpful when those beneficiaries are already in higher tax brackets.
Key Tax Considerations
Roth conversions aren’t “free,” as the converted amount is added to taxable income for the year. Potential impacts include:
- Pushing income into a higher tax bracket
- Triggering Medicare IRMAA surcharges
- Increasing exposure to Net Investment Income Tax (NIIT)
- Affecting other tax deductions or phaseouts
Because of these factors, Roth conversions are best evaluated through a comprehensive lens, not in isolation.
Summary
Roth conversions can provide a powerful opportunity for greater lifetime tax efficiency, especially for families with large pre-tax retirement account balances, but they’re just one element of a broader retirement and tax strategy.
Good financial planning isn’t a “one size fits all” experience. If you’re thinking about how this applies to your own situation, you’re already at the point where having a conversation makes sense. That’s where partnering with our practice begins:
