He Converts Three Times in His 50s. Each Conversion Starts Its Own Five-Year Clock, and One Early Withdrawal Can Cost Him a 10% Penalty

Roth conversions come with a timing rule that catches many savers in their 50s by surprise. Every conversion starts its own five-year clock for the 10% additional tax on early distributions. That clock runs separately from the single clock that decides whether Roth earnings come out tax-free. If you convert in three different years, you are keeping track of four clocks. If you lose track of one, a withdrawal you thought was penalty-free can end up with a surcharge.

Each Conversion Starts Its Own Penalty Clock

Under 26 U.S.C. § 408A(d)(3)(F), part of a Roth distribution can come from a conversion and be paid out “within the 5-taxable year period beginning with the taxable year in which such contribution was made.” When that happens, the early-distribution tax applies as though that portion were taxable income. Treasury spells out the timing in 26 CFR 1.408A-6, A-5(b). The period starts on the first day of the tax year in which you convert and ends on the last day of the fifth consecutive tax year. Under A-5(c), it is “separately determined for each conversion contribution.”

The tax only reaches the part of the conversion you had to include in income. When you convert, you generally don’t owe the additional tax on the taxable amount (26 CFR 1.408A-4, A-7(b)). You can owe it later, though. Publication 590-B (2025) says you pay the 10% “in the year of the distribution, even if you had included the conversion or rollover contribution in an earlier year.” If you had nondeductible basis, the taxable share of each conversion is worked out under the aggregation rule in 26 U.S.C. § 408(d)(2), which treats all your IRAs as one contract.

One Earnings Clock Runs Alongside

Earnings are tax-free only in a qualified distribution. That means you meet a triggering event, such as reaching age 59½, death, or disability, and you are also past the five-year period that starts with your first Roth contribution year (26 U.S.C. § 408A(d)(2)). Each owner has only one such period. It starts with the year of the first regular contribution or, if earlier, the year of the first conversion (26 CFR 1.408A-6, A-2).

Publication 590-B shows how the two clocks can split. A taxpayer converts on February 25, 2025 and makes a regular contribution for 2024 on the same day. The conversion clock starts January 1, 2025, while the contribution clock starts January 1, 2024.

Ordering Rules Decide Which Dollars Leave First

Section 408A(d)(4)(B) and Publication 590-B set the order in which money is treated as coming out:

1. Regular contributions.
2. Conversion and rollover contributions, on a first-in, first-out basis, with the taxable portion of each conversion coming out before the nontaxable portion.
3. Earnings on contributions.

All distributions from all your Roth IRAs during a year are added together (26 CFR 1.408A-6, A-9(a)). That means you can’t avoid the order by picking which account to withdraw from.

A Hypothetical Saver Converts Three Times and Needs Cash at 57

Hypothetical: Mark turns 52 in 2022. His first Roth contribution was for 2018, and over the years he has made $20,000 in regular contributions. He has no basis in his traditional IRA, so every converted dollar was taxed.

In total he converts $90,000. In 2027, at age 57, he withdraws $70,000:

• Step 1: The first $20,000 comes from regular contributions. He owes no income tax and no additional tax.
• Step 2: The next $30,000 comes from the 2022 conversion. Its clock ran out at the end of 2026, so no additional tax applies.
• Step 3: The last $20,000 comes from the 2024 conversion, whose clock runs until the end of 2028. He owes the additional tax: $20,000 × 10% = $2,000.
• Check: $20,000 + $30,000 + $20,000 = $70,000.

If Mark kept his withdrawal to $20,000 + $30,000 = $50,000, he would owe no additional tax. Neither the 2026 conversion nor his earnings would be touched. His earnings clock, which started in 2018, has already run out. Even so, earnings taken before 59½ would still be taxable, because he hasn’t had a triggering event.

Exceptions Can Wipe Out the 10%

For Roth distributions, Publication 590-B (2025) lists situations where you may not owe the additional tax: reaching age 59½; total and permanent disability; certified terminal illness; inheriting as a beneficiary; a first home; substantially equal payments; unreimbursed medical expenses above 7.5% of AGI; health insurance premiums paid while unemployed; corrective distributions; qualified higher education expenses; an IRS levy; qualified reservist, birth or adoption, and disaster recovery distributions; domestic abuse victims; and certain emergency personal expenses. Treasury confirms that “the exceptions under section 72(t) also apply” to conversion recapture. Once Mark reaches 59½, any conversion clocks still running no longer matter for the penalty.

A Decision Framework for Converting in Your 50s

• Map your cash needs before 59½. If you might need Roth money within five years of a conversion, add up your regular contributions first. Those dollars come out ahead of any conversion.
• Keep a record. Write down each conversion’s year and its taxable amount. Those two figures determine your exposure.
• Count the indirect effects. Converted income counts “for all purposes,” including how much of your Social Security is taxed. Later in your 60s, a conversion can also push you into Medicare surcharges. For 2026, Part B IRMAA kicks in above $109,000 for single filers and $218,000 for joint filers, using income from two years earlier.

Who conversions don’t suit: savers who expect to spend converted dollars before 59½, within that conversion’s five-year window, with no exception available and no other cash to bridge the gap. For them, the additional tax can wipe out part of the benefit they converted for. Savers who can leave each conversion alone until its clock runs out, or until 59½, avoid that risk entirely. (The low-tax years between a last paycheck and the first RMD are usually the cheapest time to run these conversions, which is the whole subject of our free Roth window guide: here.)

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