Open a Roth at 60 With $5,000 and Convert $200,000 at 66, and the Growth Is Tax-Free the Day You Want It. Open the Roth at 66 With the Same Conversion and the Growth Waits Until 71

Anyone considering a Roth IRA conversion late in their career has two clocks to track. The age test is the simple one: a distribution made on or after age 59½ meets half of the requirement for tax-free treatment. The other is a five-year aging period. That second clock is why two retirees with the same $200,000 conversions can reach tax-free growth years apart.

The difference comes from one detail in federal tax rules. The five-year clock belongs to the person and starts when they put the first dollar into any Roth IRA, so a saver who opens a Roth at 60 and converts at 66 can take out the growth tax-free right away. A saver who opens the account with the same conversion at that point has to wait until 71.

How the Five-Year Clock Works

Under 26 U.S.C. § 408A(d)(1), a qualified Roth distribution is excluded from gross income. Section 408A(d)(2)(B) adds a condition: a payment made within the 5-taxable-year period that begins with the owner’s first Roth contribution does not qualify, even if the owner is well past 59½.

The Treasury regulation at 26 CFR 1.408A-6 lays out how this works. The period starts on the first day of the taxable year for which the first regular contribution is made. An earlier conversion starts it sooner. It ends on the last day of the fifth consecutive taxable year. The regulation also says each Roth IRA owner has only one 5-taxable-year period covering all of his or her Roth IRAs.

That one-clock rule is what separates the two savers. A contribution for tax year 2026 starts the clock on January 1, 2026, and the period runs through December 31, 2030. Any Roth money added later, including a large conversion years down the road, falls under a clock that has already run out.

Same Conversion, Different Finish Lines

The early opener’s $5,000 fits under the 2026 IRA contribution limit of $7,500, as long as the saver has earned income and qualifies under the Roth income limits. By the time the $200,000 conversion lands at 66, both tests are already met, so the earnings on it are tax-free from day one.

The late opener’s conversion starts a new clock in the year it happens. Any growth withdrawn before that window closes counts as a nonqualified distribution. That kind of distribution is included in the owner’s gross income once withdrawals exceed total contributions, so the earnings face ordinary income tax.

In dollar terms, if the $200,000 earns 6% a year, it grows to about $267,645 over five years, or $67,645 in overall growth. The early opener can tap that money tax-free whenever it needs it, while the late opener owes income tax if it withdraws before the clock ends.

What the Late Opener Can Still Withdraw

The late opener can still reach part of the account. IRS Publication 590-B sets an order for withdrawals: regular contributions first, then conversion contributions on a first-in, first-out basis, then earnings. The converted $200,000 was taxed when it moved into the Roth, so you can take that principal back out without a second income tax bill.

Each conversion also has its own five-year rule, which carries a 10-percent additional tax. However, the regulation says the standard early-distribution exceptions apply, and reaching 59½ is one of them. At 66, the converted principal is fully available. Only the growth has to wait.

Conversion Taxes Match Either Way

Both savers face the same tax bill at conversion. Section 408A(d)(3)(A)(i) requires the converted amount to be counted as gross income in the year of the conversion. Using 2026 brackets as a guide, a single filer pays 32% on income over $201,775, so a large conversion added to other income can push a large share into higher brackets. The early contribution affects only when the growth becomes tax-free.

When Opening Late Costs Little

For some retirees, the wait won’t matter much. Under 26 U.S.C. § 408A(c)(4), Roth IRAs have no required minimum distributions while the owner is alive. Someone who converts at 66 and lives on Social Security, a pension, or taxable savings until 71 may never feel the clock. The cost lands on retirees who need the growth sooner, such as for a large medical bill or a home repair in their late 60s. The period between your last paycheck and your first RMD is often the cheapest time to convert, which we outlined in a free Roth guide here.

How to Start the Clock Early

1. Fund a Roth with a small amount. Any contribution starts the owner’s single five-year period. Under the regulation, a first conversion also starts it, so a saver without earned income can convert a small traditional IRA balance instead.
2. The filing deadline is key. Use it. According to the regulation’s example, a contribution made the following April for the prior tax year starts the clock on January 1 of that prior year.
3. Big conversions need planning. Plan them around the clock. Anyone planning a large conversion in their mid-60s will have the most flexibility if the account has already passed its five-year mark.

The rule rewards the person who opened the account first, no matter how much went in. Put a small sum in at 60, and the clock has already run out by the time a large conversion comes at 66. Skip that step and the conversion tax is the same, but the growth stays taxable until 71.

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