Roth Conversion Ladders: The Full Guide
How the strategy works, the five-year rule explained correctly (there are two of them), a year-by-year example, and how it stacks up against the other ways to fund early retirement before 59½.
A Roth conversion ladder is a way to access retirement savings before the usual age-59½ threshold, without paying the 10% early withdrawal penalty that normally applies. Instead of withdrawing directly from a Traditional IRA or 401(k) (which would trigger both income tax and, if you're under 59½, the penalty), you convert a chunk of it to a Roth IRA each year. You pay ordinary income tax on the converted amount in the year you convert, the same as you would eventually pay anyway. Then, once that specific conversion has sat in the Roth account for five years, you can withdraw it penalty-free, regardless of your age.
Do this every year for five years running, and by year five you have a steady stream of penalty-free withdrawals available, with one "rung" becoming accessible each year, indefinitely, for as long as you keep converting. That's the "ladder."
This is the part most explanations get imprecise about, and it matters. There are two separate five-year rules in Roth IRA law, and they apply to different money.
Each Roth conversion starts its own five-year clock. Once five years have passed since that specific conversion, the converted principal (the amount you converted, not any growth on it) can be withdrawn without the 10% early withdrawal penalty, no matter your age. This is the rule that makes the ladder work: five separate conversions, five separate clocks, one maturing each year.
Separately, your Roth IRA as a whole has its own five-year clock, starting from your very first contribution or conversion to any Roth IRA you own. This clock governs whether earnings (growth on your contributions and conversions, not the principal itself) can be withdrawn completely tax-free. It only needs to be satisfied once, ever. It doesn't reset with each new conversion.
Why the distinction matters: converted principal is never taxed again on withdrawal. You already paid the income tax at conversion. The only thing the conversion's five-year clock controls is the 10% penalty, and only if you're under 59½. Earnings are different: they're subject to both rules, plus your age, before they come out completely clean. Most conversion ladder plans are built to withdraw only principal, in the order it was converted, and simply leave earnings alone to keep compounding until you're past 59½ and the account-level clock is satisfied.
Say you're 50 and plan to retire at 55. You start converting five years before you'll need the money (at 50, not 55) so your first rung is ready exactly when you need it:
By age 55, when you retire, the first $40,000 rung is ready to withdraw, and you keep converting each year you're still eligible (typically while your income is otherwise low, in early retirement), so a new rung matures every year going forward. The gap you have to cover is the five years before the first rung matures (ages 50 through 54 in this example, while you're still working), not the whole retirement.
A prefund bridge fund exists to cover that exact gap: a separate taxable account holding enough cash to cover each year's conversion tax bill. The IRA covers the conversion itself; the bridge fund covers what you owe the IRS for converting it, during the years before you're living off the ladder. The calculator on this site works backward from your planned ladder to tell you how much to save monthly to have that fund ready.
You can, but it costs you twice. Every dollar used to pay the tax is a dollar that doesn't get the Roth's decades of tax-free growth. And if you're under 59½, the portion withdrawn from the Traditional side to cover the bill can also trigger the 10% early withdrawal penalty on top of the income tax itself, since that withdrawal isn't a conversion. Paying the bill from a separate account avoids both problems.
A Roth conversion ladder isn't the only way to access retirement money before 59½. Here's how the three common approaches compare:
| Approach | When it's accessible | Flexibility | Main downside |
|---|---|---|---|
| Roth conversion ladder | Each rung, 5 years after that conversion | High: each year is an independent decision; skip or stop anytime | Requires 5 years of runway before the first rung matures |
| Rule 72(t) SEPP | Immediately, no wait | Very low: locked into a fixed IRS-calculated payment schedule | Must continue for 5 years or until 59½ (whichever is longer); modifying it early retroactively triggers penalties and interest on everything already withdrawn |
| Plain taxable bridge fund | Immediately, no restrictions | Highest: it's just a normal brokerage account | Money was already taxed once to fund it, and any growth owes capital gains tax; doesn't get any of the IRA's tax-advantaged treatment |
Rule 72(t) lets you start withdrawing from a Traditional IRA or 401(k) immediately, at any age, without the 10% penalty, but only if you commit to "substantially equal periodic payments," calculated using one of three IRS-approved methods, for at least five years or until you turn 59½, whichever is longer. Deviate from the schedule early and the IRS retroactively applies the penalty (plus interest) to every payment you've already taken. It's a real option for people who need income sooner than a ladder can provide, but the rigidity is a serious tradeoff.
A plain taxable bridge fund (just saving in a normal brokerage account instead of doing any conversions) is the most flexible option by far, since none of it is inside a retirement account with withdrawal rules at all. The cost is that you're funding it with already-taxed money and paying capital gains tax on any growth, so you lose the tax-deferred (or tax-free, in the Roth's case) compounding that makes IRAs valuable in the first place.
Many early retirees end up using a combination: a smaller taxable bridge fund to cover the first few years, or the specific gap before a ladder's first rung matures, which is the exact gap this calculator sizes for, transitioning to ladder rungs once they start maturing.
Roth conversion ladders tend to make the most sense for people who:
It tends to make less sense for people who need access to funds sooner than five years out (72(t) or a taxable bridge fund may fit better), expect to stay in a similar or higher tax bracket after retiring (converting now may not save anything), or have a Traditional IRA balance that's a complicated mix of pre- and post-tax contributions.
Already decided a ladder makes sense for you? The years before your first rung matures are the part most calculators skip: you still owe tax on each conversion immediately, in cash, before any of it is accessible. This calculator works backward from your planned ladder to tell you exactly how much to save each month to have that money ready.
Open the bridge fund calculatorNo. You need five years of expenses covered by some other source (savings, part-time income, a spouse's income) for the first five years after your target retirement date, since your first rung isn't accessible until year five. After that, each subsequent year's rung becomes accessible on schedule, so the ladder is self-sustaining once it's running. The gap you need to bridge is fixed at five years, not the length of your whole retirement.
Generally no, not without tax and a possible penalty. The conversion's five-year rule only clears the way for withdrawing the converted principal penalty-free. Earnings on that money are governed by the separate account-level five-year rule and your age; withdrawing earnings before both conditions are met can trigger both income tax and the 10% penalty. Most conversion ladder plans are built around withdrawing only principal, in the order it was converted, and leaving earnings to keep growing.
You can still withdraw it, but the converted principal from that specific rung would be subject to the 10% early withdrawal penalty (not income tax again, since you already paid that at conversion) unless you qualify for an exception or have already turned 59½. That's the exact scenario the prefund calculator on this site is built to prevent: having cash on hand elsewhere so you're never forced into an early rung.
It depends on your timeline and how much flexibility you need. A 72(t) SEPP can start immediately with no waiting period, but locks you into a rigid, IRS-calculated payment schedule for five years or until 59½, whichever is longer. Deviating from it retroactively triggers penalties and interest on everything you've withdrawn. A Roth ladder requires five years of runway before the first rung is accessible, but each year's conversion is an independent decision, so you can adjust amounts, skip a year, or stop entirely without penalizing past conversions.