Yes, Roth Conversions Are Taxable — Here's What You Owe

You pay income tax on the amount you convert, in the year you convert it

When you move money from a traditional IRA, SEP-IRA, or SIMPLE IRA into a Roth IRA, the IRS treats that transfer as income. You owe federal income tax on the full amount converted — calculated at your ordinary income tax rate for that year. If you convert $50,000, you add $50,000 to your taxable income for the year, which may push you into a higher tax bracket.

The tax bill arrives when you file your return the following spring. You do not pay it upfront to the IRA custodian; you settle it with the IRS like any other income tax. This is the core trade-off of a Roth conversion: you pay tax now to avoid paying tax later on the growth and withdrawals.

Key Takeaways

• The entire amount you convert becomes taxable income in the year of conversion, taxed at your marginal income tax rate.
• If you have pre-tax and after-tax money in traditional IRAs, the IRS pro-rata rule forces you to count a portion of the conversion as taxable based on your total IRA balance.
• Converting in a low-income year — such as after retirement but before Social Security starts — can reduce the tax hit.
• State income tax applies to conversions in most states, adding to your total tax bill beyond federal tax.
• You can undo a conversion by recharacterizing it back to a traditional IRA, but only within the tax-filing deadline for that year.

How the pro-rata rule affects your tax bill

If you have both pre-tax and after-tax contributions sitting in any traditional, SEP, or SIMPLE IRA, the IRS pro-rata rule applies. This rule says you cannot cherry-pick only the after-tax money to convert. Instead, the IRS calculates what percentage of your total IRA balance is pre-tax, and applies that percentage to your conversion.

Example: You have $100,000 in a traditional IRA (all pre-tax) and $20,000 in a SEP-IRA (all pre-tax). Your total IRA balance is $120,000, and 100 percent of it is pre-tax. If you convert $30,000, all $30,000 is taxable. But if you have $100,000 pre-tax and $20,000 after-tax (from nondeductible contributions), your total is $120,000. Pre-tax money makes up $100,000 ÷ $120,000 = 83.3 percent of the balance. A $30,000 conversion means $24,990 is taxable and $5,010 is not.

The pro-rata rule applies across all your IRAs in the same year — it does not matter if the money sits in different accounts or different custodians. The IRS counts them as one pool. This rule is why people with large pre-tax IRA balances sometimes find conversions more expensive than expected.

State income tax on conversions

Federal income tax is only part of the bill. Most states tax Roth conversions as ordinary income. If you live in a state with a 5 percent income tax and convert $50,000, you owe roughly $2,500 in state tax on top of your federal bill.

A handful of states — including Florida, Texas, Nevada, South Dakota, Tennessee, Washington, and Wyoming — have no state income tax, so residents pay only federal tax on conversions. New Hampshire and Tennessee tax only interest and dividends, not wages or conversion income. If you are considering a conversion and live in a high-tax state, the state tax can be a meaningful part of your decision.

Timing conversions to lower your tax bracket

Because conversions are taxed as ordinary income, the year you convert matters. If you convert in a year when your other income is low, you may stay in a lower tax bracket and pay less tax overall.

Common low-income years include the first year of retirement (before you claim Social Security or start taking Required Minimum Distributions), a year when you took unpaid leave, or a year when you had significant capital losses. If you normally earn $120,000 per year but took a sabbatical and earned $30,000 that year, converting $40,000 might only push you into the 22 percent bracket instead of the 24 percent bracket you would normally occupy.

The reverse is also true: converting in a year when you have large bonuses, capital gains, or other income can be expensive. Some people spread conversions over multiple years to avoid a single large jump in taxable income.

What happens if you change your mind

You can undo a Roth conversion by recharacterizing it — moving the money back to a traditional IRA. This reversal must happen by the tax-filing deadline (usually April 15) of the year following the conversion. If you converted in 2024, you have until April 15, 2025 to recharacterize.

When you recharacterize, you are treated as if the conversion never happened. You do not owe tax on the amount you move back, and you can file an amended return to recover any tax you already paid. This option is useful if the market drops sharply after your conversion and you want to avoid locking in a loss, or if your income ends up higher than you expected and the tax bill is steeper than planned.

You can only recharacterize once per year for each conversion. If you convert again after recharacterizing, you cannot recharacterize that second conversion in the same tax year.

Conversions and Medicare premiums

Roth conversions increase your Modified Adjusted Gross Income (MAGI), which affects your Medicare premiums if you are on Medicare. Higher MAGI can trigger higher premiums for Part B (medical insurance) and Part D (prescription drug coverage). The premium increase is based on your income from two years prior, so a 2024 conversion affects your 2026 premiums.

If you are approaching Medicare age and considering a conversion, check your current MAGI and estimate what it would be after the conversion. The Medicare premium impact may be worth factoring into your decision, especially if you are close to an income threshold.

Conversions and Social Security taxation

Roth conversions also increase your Combined Income, which determines how much of your Social Security benefits are taxable. Combined Income is your Adjusted Gross Income plus nontaxable interest plus half your Social Security benefits. A large conversion can push more of your benefits into the taxable range, meaning you owe federal income tax on benefits you thought were tax-free.

This effect is most significant if you are already receiving Social Security and considering a conversion. If you have not yet claimed Social Security, a conversion in early retirement may not matter, because you have no benefits to tax yet.

Frequently Asked Questions

Do I have to pay the conversion tax upfront or when I file my return?

You pay it when you file your tax return the following spring. The IRA custodian does not withhold tax or send a bill to the IRS. You report the conversion on Form 8606 and pay the tax as part of your annual income tax liability. You can make estimated tax payments during the year if you expect a large bill.

Can I use money from my paycheck to pay the conversion tax?

Yes. The conversion itself is a transfer between accounts — the money stays in the IRA world. You pay the tax bill separately from your own funds, usually when you file your return. Some people increase their withholding from their paycheck during the conversion year to cover the expected tax bill.

What if I convert and the market drops before I file my return?

You can still recharacterize the conversion back to a traditional IRA by the tax-filing deadline. If the account value dropped from $50,000 to $40,000, you move the $40,000 back and owe no tax on the conversion. You file an amended return and recover any tax you already paid.

Does converting affect my tax refund or tax bracket?

Yes to both. The conversion amount is added to your taxable income, which may push you into a higher tax bracket and reduce your refund (or increase the tax you owe). If you were expecting a refund, a large conversion could turn that into a tax bill instead.

Can I deduct the conversion tax as a loss?

No. The conversion itself is not deductible. You owe tax on the full amount converted, regardless of whether the account grows or shrinks afterward. The only way to reduce the tax is to recharacterize before the filing deadline.