Roth Conversions in a Low-Income Year: A Freelancer Tax Strategy (2026)

Published: June 23, 2026 · Reading time: 8 min

TL;DR: Freelance income is lumpy, and a slow, startup, or loss year is a gift: your marginal tax rate is temporarily low, so it's the ideal time to convert pre-tax retirement money (traditional IRA, SEP-IRA, Solo 401(k)) to Roth and pay the tax at a discount. The play is to "fill up" a low bracket — convert just enough to reach the top of, say, the 12% bracket without spilling over. Watch four traps: the pro-rata rule, the ACA premium tax credit, IRMAA, and each conversion's 5-year clock. Pay the tax from outside the account, convert late in the year when your income is clear, and remember it's permanent — recharacterization is gone.

Most retirement tax strategy for freelancers is about putting money in — see backdoor Roth, the mega backdoor Roth, and SEP-IRA vs. Solo 401(k). A Roth conversion is different: it's about moving money you already have from pre-tax to Roth at the cheapest possible tax cost. And the cheapest time to do it is a year your freelance income drops. Here's how to turn a down year into a tax win.

Why a low-income year is the opportunity

A Roth conversion makes you pay ordinary income tax now on the amount you move, in exchange for tax-free growth and tax-free withdrawals later. The whole question is: what rate do you pay on the conversion?

In a strong year you might be in the 22%, 24%, or higher bracket — an expensive time to convert. But freelancers regularly have slow years, startup years, or outright loss years. In those years your taxable income — and your marginal rate — drops, sometimes into the 10% or 12% bracket. Converting then means you lock in decades of tax-free growth at a bargain rate you may never see again.

A net operating loss year is the extreme case: a business loss can offset other income and drive your taxable income very low, creating cheap — even near-free — bracket space to convert into.

How much to convert: "fill up the bracket"

The standard technique is bracket filling: convert just enough to bring your taxable income to the top of a target bracket without crossing into the next one.

1. Estimate your taxable income for the year (after the standard deduction and your QBI deduction).
2. Find the top of your target bracket (commonly the 12% bracket).
3. Convert the difference — roughly that gap — so the converted dollars are taxed at the low rate, not the next one up.

The table is the strategy in one glance: the worse the income year, the bigger and cheaper the conversion opportunity. Just don't overshoot the bracket and convert dollars at a rate higher than you intended.

The four traps to watch

A conversion raises your income for the year, which ripples outward:

1. The pro-rata rule

If you hold any pre-tax IRA money, you can't convert only after-tax dollars — the IRS taxes conversions proportionally across all your IRA balances. This is the same rule that complicates the backdoor Roth. Know your pre-tax vs. after-tax split before converting.

2. The ACA premium tax credit

Many self-employed people buy marketplace health insurance. A conversion raises your modified AGI, which can shrink or wipe out your premium tax credit. Model the subsidy hit before converting a large amount — sometimes the lost credit outweighs the bracket savings.

3. IRMAA (Medicare surcharges)

If you're near or past 65, a big conversion can push your income over an IRMAA threshold and raise Medicare premiums two years later. Spread conversions over several years to stay under the cliffs.

4. The 5-year clock

Each conversion starts its own 5-year clock. If you're under 59½, converted amounts withdrawn before that clock runs can trigger the 10% penalty. Convert money you won't need for at least five years.

Pay the tax the right way

Two rules make or break the math:

• Pay the conversion tax from outside the account. Withholding it from the converted amount shrinks what lands in the Roth and — if you're under 59½ — the withheld piece can count as a penalized early withdrawal. Use outside cash so the full balance grows tax-free.
• Budget it into quarterly estimates. The conversion adds taxable income, so fold the extra tax into your estimated payments to avoid an underpayment penalty.

Timing: convert late, because you can't undo it

The 2017 tax law eliminated recharacterization — once you convert, it's permanent for that year. So the smart move is to convert late in the year (November–December), when a freelancer can finally see total income, profit, and deductions clearly and size the conversion to fit the bracket without overshooting. Pair it with your other year-end tax moves.

Frequently Asked Questions

What is a Roth conversion and why do it in a low-income year?

It moves pre-tax retirement money into a Roth, where it grows and comes out tax-free; you pay tax now on the amount converted. A low-income year means a low marginal rate, so you convert at a discount.

How much should a freelancer convert to Roth in a down year?

Enough to "fill up" a low bracket — bring taxable income to the top of, say, the 12% bracket without crossing into the next one. The worse the year, the more cheap room there is.

What are the tax traps of a Roth conversion for freelancers?

The pro-rata rule, a reduced ACA premium tax credit, IRMAA Medicare surcharges near 65, and each conversion's separate 5-year withdrawal clock.

Should I pay the Roth conversion tax from the IRA itself?

No — pay it with outside cash so the full balance grows tax-free and, if you're under 59½, you avoid a penalty on withheld amounts. Fold the tax into your quarterly estimates.

Can I undo a Roth conversion if my income changes?

No. Recharacterization was eliminated in 2017, so conversions are permanent. Convert late in the year when your income is clear to avoid overshooting.

Authoritative References

• IRS — Roth IRAs
• IRS — Rollovers of Retirement Plan and IRA Distributions
• IRS Publication 590-A — Contributions to IRAs
• IRS Publication 590-B — Distributions from IRAs
• IRS — Retirement Topics: IRA Contribution Limits

Know Your Income Before You Convert

A Roth conversion only works if you know your real taxable income — and that starts with clean books. CentSense scans every receipt and logs every mile, mapping each to the right Schedule C line so your year-end profit (and your conversion headroom) is accurate, not a guess. Start with 10 free AI receipt scans a month, no credit card required; the Solo plan ($5/month) adds unlimited scans, mileage tracking, and a CPA-ready CSV export.

Start free →