72(t) SEPP: how substantially equal periodic payments work

What a SEPP is

Withdrawals from a Traditional IRA or 401(k) before age 59½ normally carry a 10% penalty on top of income tax. Section 72(t) of the tax code lists exceptions to that penalty, and a series of substantially equal periodic payments is the one that works at any age, for any reason. You pick an account, the IRS formula sets a yearly amount from its balance, your age and an interest rate, and you take exactly that amount every year until the commitment ends.

It's popular with early retirees because it turns a Traditional balance into a predictable income years before 59½, without the five-year wait of a Roth conversion ladder.

Which accounts can use one

• IRAs, at any time. Traditional, SEP and SIMPLE IRAs.
• A 401(k), 403(b) or other workplace plan only after you've left that employer. Many people roll the plan into an IRA first, which also makes it easier to size the SEPP.
• Just part of your savings. The schedule applies to one account, so you can split an IRA into two: one sized for the SEPP, the rest left free.

How the payment is calculated

The IRS allows three methods (Notice 2022-6), each based on the account balance and your life expectancy from one of the IRS tables:

• RMD method: balance ÷ life expectancy, recalculated every year. The smallest payment, and it changes each year with the balance.
• Fixed amortization: the balance paid out evenly over your life expectancy at an interest rate you choose, up to the greater of 5% or 120% of the federal mid-term rate. The payment is fixed, and usually the largest.
• Fixed annuitization: the balance divided by an annuity factor from the IRS mortality table, at the same interest rate. Also fixed, and usually close to amortization.

Here's what a $500,000 IRA produces in the first year, using the IRS Single Life Expectancy table (the one that gives the largest payments):

The interest rate matters too. While 120% of the federal mid-term rate is below 5%, the maximum is 5%; when it rises above, a higher rate is allowed and raises a fixed payment. For the same $500,000 at age 50:

Figures from the same formulas Retirology uses in its planning engine. The IRS also allows the Uniform Lifetime and Joint and Last Survivor tables, which give smaller payments.

Sizing it: split the IRA

Because the payment follows from the balance, the usual move is the other way round: decide what you need a year, then move just enough into a separate IRA to produce it. The rest of your savings stays flexible. Fixed amortization at 5%:

Needs can change. A SEPP that's too large can't be cut, but a second SEPP from another IRA can be added later, so starting smaller is the safer mistake.

How long you're locked in

Payments must continue unchanged until the later of five years after the first payment or age 59½. Start young and 59½ is the end point; start after 54½ and the five years decide it.

What breaks a SEPP

Any of these before the lock-in ends is a modification:

• Taking more or less than the schedule, or skipping a year.
• Adding money to the SEPP account, or rolling money in or out of it.
• Changing methods, other than the one-time switch from a fixed method to the RMD method.

The cost is steep: the 10% penalty applies retroactively to every payment you took before 59½, plus interest for the years since each one. Five years of $30,000 payments means $15,000 of penalties plus interest. Death or disability ends a SEPP without that recapture.

Taxes and health insurance

SEPP payments are ordinary income: taxed federally and by most states, with tax withheld if you choose. They also count toward the income that sets ACA marketplace subsidies, so a SEPP sized larger than you need can cost subsidy as well as tax, and crowd out room for Roth conversions under the subsidy cliff.

Every exception to the 10% early-withdrawal penalty

A SEPP is one of several exceptions in section 72(t). Some apply only to IRAs, some only to workplace plans. From the IRS's exceptions to tax on early distributions:

For an early retiree, only a few of these are a plan: age 59½, a SEPP, the Rule of 55 and — not on this list because it isn't a penalty exception — Roth IRA contributions, which come out tax- and penalty-free at any age.

SEPP, Rule of 55 or a Roth ladder?

• Leaving work at 55 or later with most savings in that employer's plan: the Rule of 55 is simpler and has no lock-in.
• Retiring in your 40s or early 50s with five years of other money (taxable savings, cash, Roth contributions): a Roth conversion ladder is flexible, and converting at low income can cost little tax.
• Retiring early without that bridge: a SEPP sized for the gap, often alongside a ladder that takes over at 59½.

Which one wins depends on your balances, taxes and health insurance together, which is why it's worth modelling year by year rather than guessing.

Sources

• IRS: Substantially equal periodic payments
• IRS: FAQs regarding substantially equal periodic payments
• IRS Notice 2022-6 (methods, interest rate, life expectancy tables)
• IRS: Exceptions to tax on early distributions

This guide explains the rules in general terms. It isn't tax advice — a SEPP is hard to undo, so check the details with a tax professional before starting one.

Common questions

Keep reading

• The Roth conversion ladder, explained
• The ACA subsidy cliff in 2026, for early retirees
• Rule of 55 vs. 72(t): getting at retirement money early
• What your Monte Carlo success rate really means
• How to work out your FI number
• How every state taxes retirement income