Convert $60,000 on Dec. 28 and the Custodian May Not Process It Until Jan. 3. It Then Counts for the New Year, and for a Retiree Going Back to Work Part-Time, Most of It Can Land at 22%
A Roth conversion request submitted before New Year's can quietly slip into the wrong tax year, and for a retiree heading back to work, that processing delay can erase thousands of dollars in carefully planned tax savings.
This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them.
The end of the year is understandably considered a firm deadline for a Roth conversion. Fidelity states: “A conversion must be completed by December 31 to be included in that year’s taxable income.” Conversions get no grace period. If a request goes in after Christmas and sits in a custodian’s queue past New Year’s Day, the money leaves the traditional IRA in January and counts as income for the new tax year.
Timing matters most for people whose income changes year to year. In February 2026, AARP found that 7% of retirees had returned to work within the previous six months, up from 6% in summer 2025. A fully retired year and a working year can fall in very different tax brackets.
Sizing a $60,000 Conversion for a Low-Income Year
Take a single 63-year-old fully retired in 2026 with $6,500 in interest and dividends. In 2026, single filers get a standard deduction of $16,100, so almost none of that income is taxed. A conversion can fill the left bracket room at a low rate.
Also in 2026, the 10% bracket runs to $12,400, and the 12% bracket to $50,400, so a $60,000 conversion brings taxable income to $50,400, the top of that bracket. Federal tax comes to $5,800, about 10% of the amount converted.
Filling the 12% bracket during a quiet year between retirement and RMDs is the point of what planners call the Roth window, which we covered in a free guide here.
When the Conversion Slips Into January
Now suppose the retiree takes a part-time job starting in January 2027 paying $40,000. The conversion request goes in Dec. 28 and processes Jan. 3. It now counts as 2027 income on top of wages. The IRS released 2026 figures on Oct. 9, 2025, and this example uses those thresholds as a stand-in.
Without the conversion, 2027 taxable income would be $30,400. With it, taxable income rises to $90,400. The first $20,000 of the conversion fills the rest of the 12% bracket. The remaining $40,000 falls in the 22% bracket, which runs to $105,700, so about 67% of the conversion is taxed at that rate.
Tax on the conversion rises to $11,200, or about 19% of the amount converted. That is $5,400 more than the December version. The account, dollar amount, and person are identical. The only difference is the conversion lands in the same tax year as a paycheck.
Two Effects That Follow the Processing Date
The big thing to remember is that you can’t reverse a conversion that lands in the wrong year. Suze Orman has explained on her podcast that “they used to allow you to do something called recharacterize the Roth back to a traditional so you didn’t have to pay taxes.” Recharacterizing conversions has been prohibited since 2018. Whatever year the custodian records is the year the income counts.
The five-year clock also moves, which starts on January 1 of the year the conversion occurs. A conversion processed January 3, 2027 starts its five-year clock a full year later than the one completed in December 2026. However, because the 5-year rule governs only the 10% early withdrawal penalty for people under 59.5, it does not trigger a penalty for a 63-year-old retiree taking withdrawals.
Once retirees reach 65, they face another cost. They can claim an enhanced senior deduction of up to $6,000, which phases out above $75,000 of modified adjusted gross income for single filers. In a low-income year, investment income plus the conversion stays below that line. In a year with a paycheck, that same conversion pushes income past it, causing the retiree to lose part of the deduction and pay a higher rate.
What to Check Before December 31
- Submit in early December. Custodians post year-end deadlines earlier than Dec. 31. Check the distribution date on the account statement, as that date determines which tax year the income lands in.
- Plan for the tax bill. Cover tax on a December conversion with a fourth-quarter estimated payment, due January 15 of the following year. A late-December request leaves little time if processing slips.
- Run the numbers again when 2027 figures come out. A retiree going back to work can use new brackets to see how much room the 12% bracket leaves above part-time wages. That amount is the limit for any 2027 conversion at that rate.
The math comes down to a few calendar days. In a low-income year, a $60,000 conversion fits within the 12% bracket. In a year with part-time wages, two-thirds is taxed at 22%. For retirees going back to work, the processing date matters as much as the amount converted.
Contact [email protected] for any questions or corrections.
David Beren has been a Flywheel Publishing contributor since 2022. Writing for 24/7 Wall St. since 2023, David loves to write about topics of all shapes and sizes. As a technology expert, David focuses heavily on consumer electronics brands, automobiles, and general technology. He has previously written for LifeWire, formerly About.com. As a part-time freelance writer, David’s “day job” has been working on and leading social media for multiple Fortune 100 brands. David loves the flexibility of this field and its ability to reach customers exactly where they like to spend their time. Additionally, David previously published his own blog, TmoNews.com, which reached 3 million readers in its first year. In addition to freelance and social media work, David loves to spend time with his family and children and relive the glory days of video game consoles by playing any retro game console he can get his hands on.
