Roth Conversions While You Still Have a Paycheck

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: Converting while working can pay in low-income years or when large pre-tax balances threaten future brackets. Measure bracket room with 2026 brackets, convert late in the year for precision, and pay tax from outside the IRA.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Roth conversions are usually pitched to early retirees in their low-income years, and for good reason. But plenty of people still collecting a paycheck have a perfectly good reason to convert now: a sabbatical year, a pay cut, a spouse who stopped working, a big pre-tax balance that will cause trouble at RMD age, or simply a bracket with room to spare. The tax code is 4 million words long; you need about 400 of them to decide whether converting while working makes sense.

This guide covers why you might convert while employed, how to measure bracket room, timing within the year, why paying the tax from outside the IRA matters, and a worked example. It uses 2026 federal brackets from the IRS, as of Oct 2026. For the retiree version, see our Roth conversion ladder guide.

CPA Warning Label: Conversions are permanent and raise MAGI, which can affect ACA credits, IRMAA and other phaseouts. Project the full return first.

Why convert while working

A Roth conversion moves money from a traditional IRA (or eligible 401(k) money) into a Roth, and the converted pre-tax amount is taxed as ordinary income that year. The bet: you pay tax now at a lower rate than you would later.

Reasons it can make sense while still working:

• A low-income year. Job change gap, sabbatical, parental leave, a startup year with low pay, or a spouse leaving work.
• Large future RMDs. Big pre-tax balances can force large required minimum distributions later, potentially raising Medicare IRMAA surcharges and the taxation of Social Security.
• Heirs in high brackets. Most non-spouse heirs must empty inherited IRAs within 10 years. Roth money passes to them tax-free.
• Tax diversification. Having pre-tax, Roth and taxable buckets gives you levers in retirement.
• Brackets are not scheduled to snap back. The 2025 law made the current bracket structure permanent, per IRS summaries, so the "convert before rates rise in 2026" urgency is gone. The decision is now about your own future bracket, not a sunset date.

Reasons not to: you are in a high bracket now and expect a lower one in retirement, you would pay the tax from the IRA itself, you are relying on ACA premium credits whose MAGI the conversion would raise, or you may need the money within five years.

Measuring bracket room

Bracket room is the amount of additional ordinary income you can add before hitting the next bracket. 2026 brackets start at these taxable income levels, per the IRS:

The 2026 standard deduction is $16,100 single and $32,200 joint. To estimate room: project taxable income (wages minus pre-tax 401(k), HSA and other adjustments, minus deductions), then subtract that from the top of your target bracket.

Watch for hidden marginal rates. A conversion can phase out deductions and credits, increase the tax on Social Security benefits, trigger the 3.8% net investment income tax threshold (it is ordinary income, but it raises MAGI), reduce the new senior deduction if you are 65 or older, and raise IRMAA two years later. Our hidden marginal tax rates page lists the common ones.

Timing within the year

Conversions are taxed in the calendar year they happen, and they cannot be undone. Recharacterization of conversions was eliminated in 2018. That makes timing important:

• Late in the year (November or December), you know your income, bonuses and capital gains, so you can fill bracket room precisely. Our December Roth conversion guide covers the year-end move.
• Earlier in the year, you get more potential time for tax-free growth, and converting after a market drop moves more shares for the same tax. The trade-off is uncertainty about income.
• Split conversions, part early and part in December, balance both.

Each conversion starts its own five-year clock for the penalty on converted principal if you are under 59½. See our Roth IRA five-year rules.

Your employer plan may allow in-plan Roth conversions. Those follow the same tax logic; see in-plan Roth conversion.

Pay the tax from outside the IRA

The value of a conversion depends heavily on where the tax money comes from. Paying from taxable savings effectively moves more money into the Roth. Paying by withholding from the conversion itself shrinks the Roth, and if you are under 59½, the withheld amount is treated as a distribution that may face the 10% early withdrawal penalty.

Estimate the extra tax and pay it via estimated payment or by increasing W-4 withholding at your job. Withholding has the advantage of counting as paid evenly throughout the year, which helps meet underpayment safe harbors. Our refund vs owe guide explains the safe harbors.

The pro-rata trap

If you have both pre-tax and after-tax (nondeductible) money in traditional, SEP or SIMPLE IRAs, conversions are taxed pro rata across all of them, based on year-end balances. You cannot convert only the after-tax dollars. Rolling pre-tax IRA money into a current employer's 401(k), if the plan accepts it, can remove it from the calculation. This matters mostly for people doing backdoor Roth contributions while working.

Conversions and the other moving parts of a working year

A working household has more interacting pieces than a retiree, and conversions touch several of them:

• Bonuses and RSUs. A December bonus can eat the bracket room you planned to use. Wait until the final paycheck amounts are known, or leave a cushion.
• Child-related credits. The child tax credit phases out at higher incomes, and the dependent care credit percentage depends on AGI. A conversion can shrink both.
• Student loans. Income-driven repayment plans typically use AGI from your tax return. A conversion raises AGI and can raise next year's payment.
• ACA coverage gaps. If a sabbatical year includes marketplace coverage, conversion income directly reduces your premium tax credit, and since 2026 there is no repayment cap on excess advance credits.
• IRA deduction and Roth contribution limits. Conversions do not count toward MAGI for Roth IRA contribution eligibility, but they can affect other MAGI-based items. Our AGI vs MAGI guide sorts out which definition each rule uses.
• State taxes. Converting while living in a high-tax state, then retiring to a no-tax state, can be a poor trade. The reverse can be a good one.

A pre-conversion checklist

1. Project this year's taxable income using a recent pay stub and year-to-date numbers.
2. Pick a target bracket ceiling, not just "convert some."
3. List any credits, deductions or benefits within a few thousand dollars of a phaseout.
4. Confirm you have cash outside the IRA for the tax.
5. Check for after-tax IRA basis and the pro-rata rule.
6. Decide on withholding increase vs estimated payment.
7. Confirm the custodian will process the conversion before December 31; some need several business days.
8. Record the conversion date and amount to track five-year clocks.

If several items on this list are uncertain, a smaller conversion now beats a perfect one never. You can always convert more next year. Conversions are a multi-year project, not a single heroic December transaction, and the households that do best usually convert a measured amount every year their bracket allows.

Illustration: a sabbatical-year conversion

Kai and Robin file jointly. In 2026 Robin takes a sabbatical, and household wages drop to $90,000. After $10,000 of pre-tax 401(k) contributions and the $32,200 standard deduction, taxable income is $47,800. Kai has $400,000 in a traditional IRA from an old job.

• Top of the 12% bracket for joint filers in 2026: $100,800.
• Bracket room at 12%: $100,800 − $47,800 = $53,000.
• They convert $53,000 in December, adding about $6,360 of federal tax (12%).
• They pay from savings via an extra estimated payment.

In a normal year, with both incomes, their marginal rate would be 22% or 24%, so the same conversion would have cost about $11,660 to $12,720. They also check that the conversion does not affect any credits they rely on. These figures are illustrative; state tax and other items will change your result. Use our Roth conversion calculator to test your own numbers.