Should I Convert My IRA to a Roth IRA?
It depends on your specific situation — not a blanket yes or no. Here's the honest framework for deciding whether a Roth conversion makes sense for you right now.
Book a Free 1-on-1 ReviewQuick Answer
A Roth conversion makes sense when your current tax rate is lower than your expected future tax rate — or when you have a window of low income that allows you to convert at a reduced cost. It may not make sense if you're in a high bracket now, need the money soon, or the conversion would trigger significant Medicare or Social Security tax consequences. The decision requires modeling your specific numbers — not a general rule.
Convert vs. Don't Convert — The Key Factors
Convert If...
- You're in a lower tax bracket now than you expect in retirement
- You've recently retired and have a window before RMDs begin
- Your traditional IRA is large and will generate significant RMDs
- You have taxable account funds to pay the conversion tax
- You want to leave tax-free assets to your heirs
- Tax rates are expected to rise in the future
- You don't need the money for at least 5 years
- You're in the 12% or 22% bracket with room to convert
Wait or Skip If...
- You're currently in a high income year (28%+ bracket)
- You expect significantly lower income in future years
- The conversion would make Social Security taxable
- You'd trigger Medicare Part B/D premium surcharges (IRMAA)
- You need the funds within 5 years
- You'd have to pay the tax from the IRA itself
- You live in a high-income-tax state
- Your health suggests a shorter time horizon
The Key Variables That Determine the Answer
The math of a Roth conversion is simple: if you pay tax at a lower rate today than you would have paid on distributions later, the conversion wins. If your current rate equals or exceeds your future rate, the conversion may not help. Estimating future rates requires projecting Social Security income, RMD amounts, investment income, and potential tax law changes.
A $1.2 million traditional IRA will generate substantial RMDs at age 73 — potentially $50,000+ per year that you don't need to spend. Those forced distributions at high tax rates are avoidable through conversions done in lower-income years before 73. The larger the IRA relative to your spending needs, the more compelling the conversion argument.
The full benefit of a Roth conversion is only realized when the tax is paid from a taxable account — not from the IRA. If you convert $50,000 and pay 22% tax from a taxable account, you move $50,000 into the Roth. If you withhold the tax from the IRA, only $39,000 enters the Roth — and the $11,000 withheld may also incur an early withdrawal penalty if you're under 59½.
If your provisional income (AGI + tax-exempt interest + 50% of Social Security) crosses $25,000 (single) or $32,000 (married), up to 50% of your Social Security becomes taxable. Cross $34,000/$44,000 and up to 85% is taxable. A large conversion can push you over these thresholds — effectively adding an extra layer of tax.
Medicare Part B and D premiums increase in tiers for higher-income beneficiaries. These surcharges are based on your income from 2 years prior — so a large conversion in 2024 can trigger higher Medicare premiums in 2026. Model this carefully before converting in any year where income is already elevated.
If leaving tax-advantaged assets to heirs is a priority, Roth IRAs are significantly more valuable than traditional IRAs. Heirs who inherit a traditional IRA must distribute it within 10 years — and pay income tax on every dollar. Heirs who inherit a Roth IRA must also distribute within 10 years, but pay no income tax. The after-tax value to heirs can be dramatically different.
The Conversion Window — Why Timing Matters
For most retirees, there's a specific window where Roth conversions are most cost-effective:
- After retirement but before Social Security is maximized — income is lower, creating room in lower brackets
- Before RMDs begin at age 73 — once RMDs start, your taxable income is higher and less bracket room is available
- While Medicare IRMAA thresholds haven't been triggered — conversions can be sized to stay just below surcharge tiers
- In years with unusual deductions — high medical expenses, charitable contributions, or other large deductions can offset conversion income
For many retirees, the window is approximately ages 60–72. The exact amount to convert each year depends on your specific income picture. The goal is typically to fill the top of the 22% or 24% bracket without spilling into 32% — while monitoring Social Security taxation and Medicare premium thresholds.
Common Mistakes
- Converting everything in one year. A single massive conversion generates a massive tax bill — potentially pushing a large portion into the 32–37% bracket. Partial conversions spread over multiple years almost always produce a better outcome.
- Not modeling Social Security and Medicare impacts. Many advisors calculate the bracket impact but overlook the Social Security taxation threshold and Medicare surcharges — which can add 8–13% of effective additional tax to the conversion.
- Assuming Roth conversions are always the right answer. They're not. If you're in a high bracket now and expect lower income later, paying tax now at 32% to avoid paying at 22% later is the wrong trade.
- Converting without enough time horizon. The break-even point on a Roth conversion — where the tax paid upfront is recouped through future tax-free growth — typically requires 7–15 years depending on assumptions. Converting at 80 may not provide enough runway.
- Ignoring state income taxes. If your state taxes ordinary income, the conversion is also subject to state income tax. A state with a 5% income tax adds meaningfully to the cost of conversion.
Real-Life Example
Martin retired at 63 with $650,000 in a traditional IRA, $40,000 in a Roth IRA, and Social Security of $28,000/year starting at 67. His essential expenses were covered — he didn't need IRA distributions yet.
His advisor modeled two scenarios:
Scenario A — No conversions: By age 73, his traditional IRA grew to $920,000. First year RMD: $37,000. Combined with Social Security and investment income, his effective tax rate on the RMDs was 24–28%. Social Security was 85% taxable. Medicare surcharges added $800/month in premium costs.
Scenario B — Partial conversions at $50,000/year, ages 63–72: He paid 22% on each conversion using brokerage funds. By 73, his traditional IRA was $420,000 and his Roth had grown to $680,000. His RMDs were manageable, Social Security taxation was reduced, and he stayed below IRMAA surcharge thresholds.
Projected lifetime tax savings: approximately $94,000. Additional tax-free assets passed to heirs: approximately $280,000.
Ten years of $50,000 annual conversions — $94,000 in lifetime tax savings. The window was open. The decision was whether to use it.
The YWait Perspective
Whether to convert your IRA is one of the highest-impact financial decisions a retiree can make — and one that requires custom analysis, not a generic answer. The right amount, the right years, and the right strategy depend entirely on your income, your goals, and your family's situation.
At YWait, we model conversion scenarios as part of every retirement income plan we build — because this decision can mean the difference of tens of thousands of dollars in taxes over your lifetime.
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