The arithmetic of early retirement usually gets solved before the plumbing does. You work out the number, you hit the number, and then you notice that most of it is sitting in accounts that charge you 10 percent to touch before you turn 59 and a half.

There are four routes around that. They are not interchangeable — each one demands something different from you, and two of them require decisions years before you need the money.

Route 1: a taxable brokerage account

The unglamorous one. Money in an ordinary taxable brokerage account has no age restriction, no forms and no commitment. You sell what you need, you pay tax on the gain, and that is the end of it.

The cost is that it earns no tax deferral on the way in, so a dollar routed here instead of into a 401(k) is a dollar taxed twice as hard over a working life. The benefit is total flexibility at exactly the moment the other routes are rigid.

This account is the bridge. Every other route on this page either needs it as a companion or is competing with it.

Route 2: the Rule of 55

If you separate from service during or after the calendar year in which you turn 55, distributions from that employer's qualified plan — a 401(k) or similar — are not subject to the 10 percent additional tax. You still pay ordinary income tax; you just skip the penalty.

Public safety employees of a state or its subdivisions get the same treatment from age 50, as do specified federal law enforcement officers, corrections and customs officers, federal and private-sector firefighters, and air traffic controllers.

Two constraints matter more than the rule itself:

  • It does not apply to IRAs. Only to employer plans. This is the single most expensive misunderstanding on this page, and it has a nasty shape: the standard advice when leaving a job is to roll your 401(k) into an IRA. Do that at 56 and you have just converted penalty-free money into money that costs you 10 percent for the next three and a half years.
  • It applies to the plan you left. Money in a previous employer's plan, from a job you left at 48, is not covered by separating from a different employer at 56.

If you are within a few years of 55 and planning to stop, the sequencing of that rollover deserves more thought than it usually gets.

Route 3: 72(t) substantially equal periodic payments

A SEPP lets you take penalty-free distributions from an IRA or a qualified plan at any age, provided you take them as a fixed series calculated one of three ways: the required minimum distribution method, which recalculates annually and therefore varies; the fixed amortization method; or the fixed annuitization method. The latter two produce a level payment.

Under Notice 2022-6, the interest rate you may assume is capped at the greater of 5 percent or 120 percent of the federal mid-term rate for either of the two months before the first payment. That cap is what determines how much annual income a given balance can produce.

The commitment is the point:

  • The series must continue until the later of five years from the first payment or the day you reach 59 and a half. Start at 45 and you are locked in for roughly fifteen years.
  • Break it and the consequences compound: the 10 percent additional tax applies to the current year's distributions, plus a recapture of every penalty you avoided in previous years, plus interest.
  • You may make exactly one permitted change — a switch from a fixed method to the RMD method.

A SEPP is the right tool when you need a predictable income floor for a long stretch and you are confident the amount will not need to change. It is the wrong tool if your spending is lumpy or your plans are unsettled, because it removes your ability to respond.

A common way to keep the commitment small: split the IRA first, and run the SEPP on a separate account sized to produce exactly the payment you want, leaving the rest untouched and flexible.

Route 4: the Roth conversion ladder

Each year you convert a slice of traditional IRA money to a Roth, pay income tax on it that year, and wait. After the conversion's five-year period is up, that converted amount can come out without the 10 percent additional tax regardless of your age.

The clock is the part people get wrong. A separate five-year period applies to each conversion, beginning with the calendar year in which the conversion occurs. An amount converted in December 2026 and an amount converted in January 2026 mature on the same day: 1 January 2031. Convert every year and you get a rung maturing every year — hence the ladder.

Roth distributions come out in a fixed order, which works in your favour:

  1. Regular contributions — available any time, no tax, no penalty, no waiting.
  2. Converted amounts — oldest first, each subject to its own five-year clock.
  3. Earnings — last, and the most restricted.

The ladder's weakness is its start-up cost. It produces nothing for five years. Someone who retires and starts converting on day one still needs five full years of spending from somewhere else — which is why the ladder and the bridge account are companions rather than alternatives.

How this changes the bridge you need

The size of your bridge is not "annual expenses times years to 59 and a half". That overstates it, because the money you have not spent yet stays invested and keeps earning. What you actually need is the present value of the spending stream over the gap, discounted at your real return.

Each route shortens or narrows that stream rather than removing it:

  • Rule of 55 ends the gap at 55 rather than 59 and a half — it removes years from the end of the bridge.
  • 72(t) covers part of each year's spending for the whole gap — it lowers the bridge rather than shortening it.
  • Roth ladder covers everything after year five — it turns a long bridge into a five-year one.

Those are different shapes, and they produce very different numbers from the same portfolio. The Bridge Account Calculator works the present value out year by year, so you can see what the bridge costs under each assumption instead of guessing at a multiple.

Choosing between them

A rough decision order that fits most situations:

  • Retiring at 55 or later, with the money in your current employer's plan? The Rule of 55 is the cheapest route and needs no advance planning — just do not roll the plan into an IRA first.
  • Retiring in your 40s with a long gap and stable spending? A ladder, started early, with a bridge account covering the first five years.
  • Need a fixed income floor and have no traditional balance worth converting? A 72(t) on a deliberately sized sub-account.
  • Not sure yet? Build the taxable account. It is the only route that costs you nothing in optionality, and it is a prerequisite for the ladder anyway.

This guide describes published IRS rules as a general matter. It is not financial or tax advice, it cannot account for your circumstances, and the rules change. A 72(t) series and a conversion ladder both have consequences that are difficult to unwind — take either one to a qualified adviser before you start.

Sources

Every rule described above comes from one of these. Where a figure or a threshold matters to a decision, check it here rather than relying on this page — the rules change, and this page may not have caught up.

  1. IRS — Exceptions to Tax on Early Distributions — the age-55 separation-from-service exception, why it excludes IRAs, and the age-50 public safety rule
  2. IRS — Substantially Equal Periodic Payments — the three calculation methods, the Notice 2022-6 interest rate cap, the duration requirement and the recapture tax
  3. IRS Publication 590-B, Distributions from IRAs — the Roth ordering rules and the separate 5-year period that applies to each conversion

Frequently asked questions

Can I use the Rule of 55 on an IRA?

No. The age-55 separation-from-service exception applies to employer plans such as a 401(k), not to IRAs. This is why rolling a 401(k) into an IRA when you leave a job can be an expensive reflex if you are between 55 and 59 and a half — the rollover destroys access you already had.

How long does a 72(t) payment series have to run?

Until the later of five years from the first payment or the date you reach 59 and a half. Someone starting at 45 is committed for roughly fifteen years. Someone starting at 57 is committed for five.

What happens if I break a 72(t) series?

Modifying the payments outside the permitted circumstances triggers the 10 percent additional tax on that year, plus a recapture of all the additional tax you avoided in prior years, plus interest. The one permitted change is a single switch from a fixed method to the required minimum distribution method.

How does the Roth conversion ladder five-year rule work?

Each conversion carries its own five-year period, beginning on the first day of the tax year in which you converted. An amount converted at any point in 2026 becomes available without the 10 percent additional tax from 1 January 2031. That is why the ladder has to be started roughly five years before you need the first rung.

In what order does money come out of a Roth IRA?

Regular contributions first, then converted amounts, then earnings. Your own regular contributions can be withdrawn at any age without tax or penalty, which makes them the most flexible money in the structure and worth spending last for exactly that reason.

Do I need a taxable brokerage account at all if I use a ladder?

Yes, for the first five years. A Roth conversion ladder produces nothing accessible until its first rung matures, so something else has to pay for the gap. That gap is what a bridge account is for.