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Retirement

Roth Conversion vs Backdoor Roth IRA

Compare Roth conversions and backdoor Roth contributions — two ways to get money into a Roth despite limits.

Overview

A Roth conversion moves existing pre-tax money (Traditional IRA, 401(k)) into a Roth and pays the income tax now. A backdoor Roth is a contribute-and-immediately-convert maneuver for high earners who exceed the Roth income limit. They overlap mechanically but solve different problems.

Feature
Roth Conversion
Backdoor Roth IRA
Starting Money
Existing pre-tax balance
New after-tax contribution
Annual Cap
No conversion limit
$7,000 ($8,000 if 50+) — IRA contribution cap
Tax Bill
Owed on the full converted amount
Usually $0 if done immediately with no other pre-tax IRA
Income Limit
None for converting
None for the contribute-then-convert maneuver
Pro-Rata Rule Risk
Yes — applies if you have other pre-tax IRA money
Yes — same risk; clean out pre-tax IRAs first
Best Year To Do It
Low-income year between jobs or pre-RMD years
Annually — typically every January
Common Use Case
Large pre-tax balance, want tax-free growth
High earner blocked from direct Roth contributions

Choose Roth Conversion when...

Use a Roth conversion in a low-tax year, in early retirement, or when you want to move large pre-tax balances into the Roth bucket over time.

Choose Backdoor Roth IRA when...

Use the backdoor Roth annually if your income exceeds the direct-contribution limit but you still want $7,000 of Roth space.

Our Verdict

These tools complement rather than compete. The backdoor Roth is the standard annual move for high earners. Roth conversions are a multi-year strategy in low-income windows — early retirement before Social Security and RMDs is the textbook setup. Both require care around the pro-rata rule if you have other pre-tax IRA balances.

Frequently Asked Questions

What is the difference between Roth Conversion and Backdoor Roth IRA?

A Roth conversion moves existing pre-tax money (Traditional IRA, 401(k)) into a Roth and pays the income tax now. A backdoor Roth is a contribute-and-immediately-convert maneuver for high earners who exceed the Roth income limit. They overlap mechanically but solve different problems.

When should I choose Roth Conversion over Backdoor Roth IRA?

Use a Roth conversion in a low-tax year, in early retirement, or when you want to move large pre-tax balances into the Roth bucket over time.

When should I choose Backdoor Roth IRA over Roth Conversion?

Use the backdoor Roth annually if your income exceeds the direct-contribution limit but you still want $7,000 of Roth space.

Related Comparisons

Traditional IRA vs Roth IRARoth IRA vs 401(k)Roth IRA vs Taxable Brokerage Account

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