Roth Conversion Analysis
Compare converting traditional IRA to Roth. Pay tax now at current rate vs. later at future rate.
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Convert in low-income years Roth has no RMDs Pro-rata rule affects partial conversions
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Why: Roth conversions can reduce future taxes and RMDs. Timing matters—convert when rates are low.
How: Enter conversion amount, current and future tax rates, years to grow, and return. See tax due and net benefit.
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Roth Conversion Calculator
Tax impact • Break-even • Future value comparison
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Conversion Details
Future Value Analysis
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Recommendation
Tax due: $12,000, Net benefit: $27,589
For educational and informational purposes only. Verify with a qualified professional.
💡 Money Facts
Roth conversions are irreversible since 2018
— IRS
📋 Key Takeaways
- • Pay tax from outside funds when possible—keeps more money growing tax-free in the Roth
- • Convert in stages to manage tax brackets and avoid IRMAA surcharges
- • Consider Medicare IRMAA surcharges when converting in years near or after 65
- • No 5-year wait on conversions after 59½—converted amounts are immediately qualified
💡 Did You Know?
📖 How Roth Conversion Analysis Works
This calculator compares converting a traditional IRA to Roth now versus leaving it in traditional form. Roth: you pay tax now, then growth is tax-free. Traditional: growth is tax-deferred, but withdrawals are taxed. The break-even depends on current vs future tax rates and time horizon.
Roth Advantage
Roth Future Value = (Amount − Tax if paid from IRA) × (1 + r)^n. No tax on withdrawal.
Traditional
Traditional After-Tax = Amount × (1 + r)^n × (1 − future tax rate)
🎯 Expert Tips
💡 Low-Income Years
Convert in years with reduced income—retirement before Social Security, sabbatical, or business loss.
💡 Ladder Conversions
Convert annually up to the top of your current bracket instead of one large conversion.
💡 IRMAA Awareness
Conversion income can trigger Medicare IRMAA surcharges two years later. Model carefully.
💡 Estate Planning
Roth IRAs pass to heirs without RMDs during your life—beneficiaries get tax-free growth.
⚖️ Roth vs Traditional Comparison
| Factor | Roth Conversion | Stay Traditional |
|---|---|---|
| Tax timing | Pay now | Pay at withdrawal |
| RMDs | None | Required at 73 |
| Future rates | Lock in current | Exposed to future |
| Heirs | Tax-free | Taxable to heirs |
❓ Frequently Asked Questions
When should I convert to Roth?
Consider converting when you expect higher tax rates in retirement, have a long time horizon, or want to reduce future RMDs. Low-income years are ideal.
Can I undo a Roth conversion?
Recharacterization of Roth conversions was repealed for 2018 and later. Conversions are permanent.
Does the 5-year rule apply to conversions?
Each conversion has its own 5-year clock for penalty-free withdrawal, but after 59½ there is no early withdrawal penalty on conversions.
How does IRMAA affect conversions?
Conversion income increases MAGI, which can trigger Medicare Part B and D surcharges two years later. Plan conversions before or after Medicare eligibility.
Should I pay tax from the IRA or outside?
Paying from outside funds is usually better—you preserve more in the Roth for tax-free growth.
What is a backdoor Roth?
High earners contribute to a non-deductible traditional IRA, then convert to Roth. Pro-rata rules apply if you have other traditional IRA assets.
Can I convert my 401(k) to Roth?
Yes—in-plan Roth conversion or roll to Roth IRA. Rules vary by plan.
📊 Roth Conversion by the Numbers
📚 Official Data Sources
- • IRS Pub 590-A – Contributions to IRAs
- • IRS.gov – Roth conversion rules
- • CMS.gov – Medicare IRMAA
⚠️ Disclaimer: This calculator provides estimates only. Roth conversion decisions depend on many factors including future tax rates, IRMAA, and estate plans. Consult a tax professional or financial advisor.
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