Converting a traditional IRA before retirement can move future withdrawals into a Roth IRA, but it usually brings the untaxed portion of the conversion into your taxable income immediately. The right choice depends on your basis, current and expected retirement income, time horizon, ability to pay the tax outside the IRA, and state-specific effects.
There is no universal conversion age, dollar amount, or tax-rate threshold that works for everyone. A current, personal projection is necessary before committing money to an generally irreversible transaction.
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What a Roth conversion changes
A Roth conversion transfers money from a traditional IRA to a Roth IRA. Traditional IRA contributions and earnings generally receive tax-deferred treatment; amounts that were deductible, plus their earnings, have not yet been taxed. When those untaxed amounts are converted, they are generally included in gross income for the conversion year.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsYour basis matters. Nondeductible traditional IRA contributions create basis. Under the IRA basis rules, the return of that basis is not included in income, while the untaxed portion is generally taxable. Do not assume that the entire account balance is taxable or that a contribution made years ago can be ignored. Gather the Form 8606 records and other documentation that establish your basis before calculating a conversion.
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Conversion eligibility is different from Roth contribution eligibility
A Roth conversion is not the same as making a regular annual Roth IRA contribution. IRS Topic 309 says that, regardless of adjusted gross income, a person may be able to convert traditional IRA amounts to a Roth IRA. That does not remove the separate income and other requirements for direct Roth contributions. See the IRS explanation at https://www.irs.gov/taxtopics/tc309.
The six facts that should drive your decision
Evaluate the proposed conversion on all of these dimensions. One favorable factor cannot, by itself, establish that converting is better than waiting.
1. Your current taxable income
The conversion is added to your other income for that tax year to the extent it consists of untaxed IRA money. Estimate the incremental federal tax created by the proposed amount rather than looking only at the account balance. A conversion that fits comfortably within your current tax situation may have a different result if the same dollars push more income into higher brackets or interact with deductions and credits.
2. Your traditional IRA basis
Separate deductible and nondeductible contributions, earnings, and prior conversions. The taxable portion is determined under the applicable basis rules, not by a simple assumption that every dollar withdrawn is taxable. If your records are incomplete, reconstruct them before transferring money; an incorrect basis can produce either unnecessary tax or an inaccurate return.
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3. Cash available to pay the tax
Paying the conversion tax from money outside the IRA generally leaves the converted amount intact in the Roth. Using part of the IRA distribution for withholding or tax payment reduces the amount that reaches the Roth and can create additional complications if you are younger than the applicable penalty exception ages. The decision should therefore include a realistic source for the tax bill, not just an estimate of the tax rate.
4. Expected retirement income and required distributions
Compare your income today with the income you expect from wages, pensions, Social Security, investments, and IRA withdrawals after retirement. A conversion may be more attractive when a person expects substantially different taxable income later, but a projection must include the timing and size of withdrawals. Traditional IRA owners generally face required minimum distribution rules; those future distributions can change the amount of taxable income in retirement.
5. Years before you need the money
Time matters because Roth conversions have a separate five-year rule for distributions. Converting shortly before a planned withdrawal can leave less time for the conversion to age under that rule. If you will not need the funds for many years, the timing issue may be less restrictive, but it still must be checked against your age, the reason for the withdrawal, and any exception to the additional-tax rules.
6. State and other income-linked effects
Federal tax is only one part of the calculation. State income-tax treatment varies, and a higher adjusted gross income can affect other income-linked items, including programs or premiums that use income measures. The federal IRS publications do not resolve those state and personal consequences, so include your state of residence and a current local analysis in the projection.
Compare the three practical paths
| Approach | Tax timing | When it can fit | Main issue to test |
|---|---|---|---|
| Convert the eligible balance now | Untaxed converted amounts are generally included in this year’s income. | You can pay the resulting tax from non-IRA funds and expect the Roth to remain invested until withdrawals are permitted under the applicable rules. | The immediate tax and any state or income-linked effects may outweigh the expected future benefit. |
| Convert only part of the balance | Only the selected amount is considered for the year’s conversion income, subject to basis rules. | You want to manage the size of the income increase while beginning a Roth strategy. | Each conversion has its own records and five-year period, and several partial conversions can complicate tracking. |
| Wait and keep the traditional IRA | No conversion income is created until a later conversion or ordinary distribution. | You lack cash for the tax, have unusually high income now, or need more information about retirement income and state treatment. | Future tax rates, required distributions, and the value of tax-free Roth withdrawals may differ from your assumptions. |
This comparison is a framework, not a recommendation. The relevant question is which path produces the better result for your projected lifetime cash flow after tax, not which account label is preferable in isolation.
How to complete a conversion
The IRS describes three transfer methods. Choose the method your IRA providers support and keep the transaction documentation with your tax records.
- Inventory the accounts and basis. List every traditional, rollover, SEP, and SIMPLE IRA that may be relevant to your basis records, along with current values, deductible and nondeductible contributions, prior conversions, and the amount you are considering.
- Estimate the taxable amount. Apply your basis information to the proposed full or partial conversion. Model the resulting increase in income for the tax year, then estimate federal and state tax using your current filing status and other income.
- Decide how to fund the tax. Identify cash outside retirement accounts for the expected liability. If the conversion produces taxable income, the 2025 IRS Publication 590-A notes that you may need to increase withholding or make estimated payments.
- Select a transfer method. A 60-day rollover sends the distribution to you for redeposit into the Roth within 60 days. A trustee-to-trustee transfer sends money directly from the traditional IRA trustee to the Roth IRA trustee. A same-trustee transfer moves money between the two accounts when both are held at one institution.
- Specify the amount. The IRS allows a conversion to be partial or complete. Give the provider clear instructions about the dollar amount or assets being converted and confirm the destination Roth IRA.
- Verify the tax reporting. A conversion is reported on Form 8606 as applicable. Match the form to the year-end tax documents from both institutions and retain evidence of the amount transferred and the basis calculation.
- Reconcile after filing. Confirm that withholding or estimated payments cover the additional liability and that the conversion is reflected consistently on your federal and state returns.
Required minimum distributions cannot be converted
The required distribution for a year cannot be converted to a Roth IRA. Publication 590-A includes the year an account owner reaches age 73 in this restriction. Treat the required amount as a distribution that must be handled under the applicable RMD rules; do not designate it as the conversion amount. Any separate conversion decision must account for the RMD restriction and the resulting taxable income.
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The conversion five-year rule
Publication 590-B explains that a separate five-year period applies to each conversion. A distribution attributable to the taxable conversion amount during that period may trigger the 10% additional tax, subject to applicable exceptions. This rule matters especially when you convert money and expect to spend it soon afterward.
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The qualified-distribution rule
Qualified Roth IRA distributions have their own requirements, including an age requirement and a five-tax-year holding requirement. Meeting the conversion five-year period does not automatically make every Roth withdrawal qualified. Track the dates of both the Roth account’s five-tax-year period and each individual conversion.
Conversions made after 2017 generally cannot be undone
For tax years beginning after December 31, 2017, Publication 590-A says a conversion cannot be recharacterized as a traditional IRA contribution. In practical terms, a market decline or a later change in your tax situation does not generally provide a way to reverse the conversion for tax purposes. Check the tax year and transaction type before moving money, because an error can leave taxable income in place even when the account value later falls.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Build a decision worksheet before you transfer money
Write down the assumptions that will determine the result. A useful worksheet contains:
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- Current taxable income and the proposed conversion amount.
- Traditional IRA balances and documented nondeductible basis.
- Cash available outside retirement accounts for federal and state tax.
- Expected retirement income by year, including planned IRA withdrawals and the year RMDs will begin.
- The earliest date you might need converted funds and the reason for that withdrawal.
- Your state of residence and any income-linked effects that need a local calculation.
- Whether the transfer will be completed by a 60-day rollover, trustee-to-trustee transfer, or same-trustee transfer.
- The forms and records you will need, including Form 8606 when applicable.
Run at least two projections: one for the proposed conversion and one for leaving the money in the traditional IRA. If the result changes materially when you alter retirement income, market returns, filing status, or state, treat the decision as sensitive rather than relying on a single-point estimate.
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Situations that deserve extra caution
- Incomplete basis records: Do not estimate the taxable portion from memory. Missing Form 8606 information can distort the calculation.
- No outside cash for tax: A conversion funded entirely from the IRA can reduce the amount transferred and may create early-distribution issues.
- Conversion near retirement withdrawals: The separate five-year rule can matter when the money will be spent soon.
- An RMD year: The required distribution cannot be converted, including the year the owner reaches age 73 under the cited IRS rule.
- Large one-time conversions: A sizable increase in income can affect federal tax and state or other income-linked items, so model the full year rather than only the account transaction.
- Multiple accounts or prior conversions: Keep a transaction-by-transaction schedule so each conversion’s five-year period and tax reporting remain clear.
When professional advice is warranted
A tax professional or fiduciary financial planner can be useful when you have nondeductible basis, multiple IRA types, prior conversions, a pending RMD, a move between states, or a retirement-income plan that spans many years. Ask for a written comparison of converting now, converting a specified partial amount, and waiting. The analysis should show the taxable amount, assumptions about future income, the source of tax payments, and the treatment of state and income-linked effects.
The IRS publications explain the mechanics, but they do not determine that conversion is advantageous for a particular taxpayer. A recommendation should therefore be based on your records and a current projection rather than a general rule about Roth accounts.
Bottom line
Convert before retirement only when the projected lifetime benefit of moving eligible, untaxed IRA money to a Roth outweighs the immediate tax and the loss of flexibility created by an generally irreversible transaction. Confirm your basis, exclude the year’s required distribution, plan the tax payment, check both five-year rules, and compare a full conversion with a partial conversion and with waiting. If those inputs are not known, the next step is to gather them and obtain a current tax projection—not to convert solely because retirement is approaching.
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