Ladder vs 72(t) vs the Rule of 55

The problem all three solve

Withdraw from a Traditional IRA or 401(k) before age 59½ and you generally owe a 10% early-withdrawal penalty on top of ordinary income tax. For someone retiring at 45, that penalty applies to fifteen years of spending. Each of these three approaches is a way around it, and each charges a different price.

Side by side

The conversion ladder

Convert a chosen amount each year, pay ordinary income tax on it, wait five tax years, then withdraw that principal with no tax and no penalty. Its defining feature is that you set the amount every year — you can convert to the top of the 12% bracket this year, stop entirely next year because you have a large capital gain to realize, and resume the year after.

That flexibility is what makes it the default recommendation for early retirees who can afford the entry price. The entry price is real: five years of living expenses plus five years of conversion tax, all from outside the IRA. See the bridge fund guide for what that actually totals.

Choose it when you are retiring well before 55, you have substantial taxable savings, and you want to keep control of your taxable income year by year — which matters enormously if you are managing an ACA subsidy.

72(t) substantially equal periodic payments

Section 72(t)(2)(A)(iv) permits penalty-free distributions before 59½ if you take them as a series of substantially equal periodic payments. Income tax still applies; only the penalty is waived. There are three IRS-approved calculation methods:

• Required minimum distribution method. Recalculated annually, so the payment moves with your balance. Lowest payment of the three, and the only one that varies.
• Fixed amortization. Amortizes the balance over your life expectancy factor at an allowable interest rate (up to 5.0% or 120% AFR). Produces the highest level, predictable annual cashflow of all three methods.
• Fixed annuitization. Divides the balance by an annuity factor derived from IRS mortality tables in Treas. Reg. § 1.401(a)(9)-9(e). Also fixed, producing a conservative level payment with a built-in safety buffer against portfolio depletion.

The permitted interest rate is governed by IRS Notice 2022-6, which allows up to 5.0% or 120% of the federal mid-term rate, whichever is higher. Because that statutory 5.0% floor exists, the payout a given balance supports is substantially larger than it was during the low-rate era under Revenue Ruling 2002-62.

You can model your exact figures across all three methods, test account split sizes, and simulate inflation drag using the interactive 72(t) SEPP Calculator.

One practical mitigation: split your IRA before starting, and run the 72(t) on only one of the resulting accounts. The payment scales with the balance in the account the plan applies to, so this is how you size the income stream to what you actually need instead of what your whole balance would generate. The untouched account stays fully flexible. Reverse-engineer your target split with the 72(t) calculator's account-splitting tool.

Choose it when you need income now, you have no bridge fund, and your spending is predictable enough to live with a fixed payment for years.

The Rule of 55

The simplest of the three, and the most commonly missed. If you separate from your employer during or after the calendar year you turn 55, you can take distributions from that employer's plan with no 10% penalty. Income tax applies as usual. No formula, no schedule, no commitment — withdraw what you need, when you need it.

The constraints are narrow but absolute:

• Employer plans only. 401(k), 403(b), and similar. It does not apply to IRAs, ever.
• Only that employer's plan. A 401(k) from a job you left at 48 does not qualify, even after you turn 55.
• Rolling to an IRA forfeits it. This is the expensive mistake — the money becomes IRA money, subject to the IRA rules, and the exemption is gone.
• The plan must permit partial withdrawals. Some require a single lump sum, which is a tax disaster. Check the plan document before separating if you can.
• Age 50 for qualified public safety employees. Firefighters, police, EMTs, and certain federal roles.

The year you turn 55 is what counts, not your birthday. Separate in January of the year you turn 55 in December and you qualify.

Choose it when you are retiring at 55 or later with a 401(k) at that employer. In that situation it is nearly always the right first tool — no waiting, no commitment, no bridge required.

Combining them

These are not mutually exclusive, and the strongest plans usually layer them.

Rule of 55 plus a ladder is the cleanest pairing. Withdraw from the 401(k) to fund living expenses and conversion tax while a conversion ladder seasons behind it. By the time the plan balance is drawn down, the first tranches are unlocking. The sequencing rule is critical: do not roll the whole 401(k) to an IRA to enable conversions, because that destroys the Rule of 55 access you are relying on. Leave the bridge money in the plan and convert from a separate Traditional IRA.

72(t) plus a ladder works when you retire young with no taxable savings. Run the 72(t) on a carved-out IRA to cover the first five years, ladder the rest, and let the series expire once the ladder is producing. Watch the interaction with ACA subsidies — 72(t) distributions are ordinary income and they stack with conversion income in the same modified AGI that the subsidy cliff is measured against.

Choosing

The last row matters more than it looks. All three of these exist to avoid one specific penalty, and that penalty disappears at 59½. Converting after that age can still be worthwhile to reduce future required minimum distributions or manage IRMAA exposure, but it is no longer a ladder and the five-year clocks no longer gate anything.

Common questions

What is the difference between a Roth conversion ladder and 72(t)?

A conversion ladder gives you permanent flexibility at the cost of a five-year wait: you convert what you choose each year, and nothing is accessible until the first five-year clock matures. A 72(t) series of substantially equal periodic payments gives you money immediately at the cost of rigidity — once started, the payment amount is fixed by formula and must continue for five years or until age 59½, whichever is longer, or the 10% penalty applies retroactively to every payment.

What is the Rule of 55?

The Rule of 55 lets you withdraw from an employer retirement plan without the 10% early-withdrawal penalty if you separate from that employer during or after the calendar year you turn 55. It applies only to that employer’s plan, not to IRAs, and rolling the balance to an IRA forfeits it. Qualified public safety employees can use it from age 50.

Can you use the Rule of 55 and a Roth conversion ladder together?

Yes, and they complement each other well. Rule of 55 withdrawals from the 401(k) can fund the five-year bridge period while a conversion ladder seasons in the background. The sequencing caution is that rolling the 401(k) to an IRA to enable conversions destroys Rule of 55 access — so leave enough in the plan to cover the bridge, and convert from a separate IRA.

What happens if you break a 72(t) plan?

The 10% early-withdrawal penalty is applied retroactively to every distribution taken under the plan, plus interest. Taking one dollar too much, one dollar too little, or stopping early all count as modification. The narrow exceptions are death, disability, and a one-time switch to the required minimum distribution method, which is permitted precisely because the alternative was so punitive.

Which is better for early retirement: a Roth ladder or 72(t)?

It depends on how far you are from 59½ and whether you have taxable savings. If you have five years of spendable money outside your retirement accounts, the ladder is almost always better because it leaves you in control of the amount each year. If you need income now and have no bridge, 72(t) is the tool that works. Retiring at 55 or later usually makes the Rule of 55 simpler than either.

Model a conversion ladder · What a bridge fund costs · The ladder strategy