Yes — moving Traditional IRA dollars into a Roth IRA is a Roth conversion, allowed at any income level since 2010. The pretax portion and gains are generally ordinary income in the conversion year; recovered Traditional IRA basis is nontaxable (IRC §408A(d)(3)). There is no separate annual conversion-dollar cap, but a conversion cannot exceed eligible source assets. Conversions are irreversible since the 2017 TCJA, and the pro-rata rule (IRC §408(d)(2)) may apply.

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Quick Facts

  • check_circleNo income limit on conversions since 2010 (TIPRA). A nondeductible IRA contribution followed by a conversion may be available when direct Roth income limits apply, but contribution eligibility and reporting rules still matter.
  • infoTax treatment follows the dollars. Pretax amounts and gains are generally ordinary income; recovered Traditional IRA basis is nontaxable. Form 1099-R and Form 8606 report the transaction.
  • infoNo separate annual conversion-dollar cap. The conversion cannot exceed eligible source assets, and its tax and AGI effects depend on the taxpayer's return.
  • warningPro-rata rule may apply when the owner's annual Traditional/SEP/SIMPLE IRA pool contains pre-tax money. Per IRC §408(d)(2).
  • warningConversions are irreversible after TCJA (2018+). Recharacterization of conversions was eliminated. Recharacterization of contributions still allowed.

Mechanics of a Conversion

The procedure varies slightly by custodian but the core steps are universal:

  1. Decide the conversion amount. Based on tax-bracket-fill strategy (convert up to the top of your current bracket without crossing into a higher one) or other planning logic. See Roth Conversion Tax for the full federal+state+IRMAA stack.
  2. Initiate the conversion. Same-custodian conversions are usually a single online form. Cross-custodian: trustee-to-trustee transfer (preferred) or 60-day indirect rollover.
  3. Ask how withholding will be handled. Any amount withheld remains an IRA distribution even though it does not reach the Roth, and it may have separate tax or penalty consequences. See How to Pay Taxes on a Roth Conversion.
  4. Receive Form 1099-R from the source Traditional IRA reporting the distribution. The custodian assigns the distribution code based on the transaction and taxpayer information.
  5. File Form 8606 with your tax return for the conversion year. Reports the conversion, calculates basis allocation per the pro-rata rule, and computes taxable vs. basis-recovery portions.
  6. Pay the tax via either quarterly estimated tax (Form 1040-ES) or increased W-2 withholding to avoid the §6654 underpayment penalty.

The Pro-Rata Rule You Need to Know About

If one owner's annual Traditional, SEP, and SIMPLE IRA pool contains both pre-tax money and basis, IRC §408(d)(2) allocates basis proportionally. Form 8606 uses the conversion-year December 31 value plus relevant same-year distributions and conversions, so you cannot cherry-pick after-tax dollars from one account.

Worked example: assume $92,500 of pre-tax IRA money, $7,500 of basis, a $7,500 conversion, no other IRA transactions or gains, and a $92,500 combined December 31 balance. The annual denominator is $100,000, so only 7.5% × $7,500 = $562.50 is nontaxable. The other $6,937.50 is taxable.

Potential responses include converting the entire pool and paying the resulting tax, waiting for a later year, or completing an eligible reverse rollover of the otherwise taxable IRA amount to an employer plan by December 31 of the conversion year. The plan must accept the exact IRA source, and basis cannot be rolled into it. Cleanup need not precede the conversion. See How to Avoid the Pro-Rata Rule for the full procedure.

Why People Do This

Five common reasons for converting traditional IRA dollars to Roth:

  • Tax-rate hedge. Pay tax now at known rates; never pay tax again in retirement when rates may be higher.
  • RMD elimination. Roth IRAs have no lifetime RMDs; traditional IRAs require RMDs at age 73+ (75 for those born 1960+). Converting removes the future RMD burden.
  • Tax diversification. Mix of pre-tax and after-tax buckets in retirement gives year-by-year tax-management flexibility.
  • Estate planning. Roth IRAs pass to heirs generally tax-free; traditional IRAs are taxable to inheritors. Converting now (paying your tax) removes the tax burden from heirs.
  • Backdoor Roth (high earners). Direct Roth IRA contributions are blocked above the MAGI limit, but conversions have no income limit. A qualifying nondeductible Traditional IRA contribution may be followed by a conversion. Federal law sets no minimum waiting period; gains, the annual pro-rata calculation, and Form 8606 basis records determine the taxable amount.

When NOT to Convert

  • Currently in a high tax bracket, expecting much lower retirement bracket. Pay 35% now to skip 12% later — bad math.
  • Need the converted dollars to pay the tax. Using the conversion principal to pay tax destroys most of the conversion's economic benefit; pay from outside funds.
  • Pro-rata rule applies and you can't avoid it. If you have $500K of pre-tax IRA dollars and want to convert $7K of basis, the math may not justify the cost.
  • Conversion would push you across an IRMAA cliff or trigger SS taxation. The hidden tax cost can exceed the marginal-bracket cost by 5-10% effective rate. Run the True Cost of a Conversion tool with your numbers before committing.