72(t) SEPP Calculator
Planning to retire before 59½? Section 72(t) of the IRS tax code lets you take penalty-free withdrawals from a traditional IRA or 401k through Substantially Equal Periodic Payments. Compare all three IRS-approved methods and see your required annual payment and commitment period.
Your Numbers
Your Commitment
Annual payment
$30,842
Monthly equivalent
$2,570
Commitment ends
Age 59.5
Total years
8 years
Using IRS Single Life Expectancy Table (2022 revision, Pub 590-B). At age 52, your life expectancy factor is 34.1 years. Interest rate for fixed methods must not exceed 120% of the federal mid-term rate as published by the IRS.
How SEPP fits into your early retirement plan
The 10% early withdrawal penalty applies to any traditional IRA or 401k distribution before age 59½. For most early retirees the preferred bridge strategy is to draw from Roth accounts or a taxable brokerage first, since those carry no penalty and no mandatory timing. But when those accounts are not large enough, SEPP becomes the practical alternative.
The most important planning consideration is that your SEPP payment counts as ordinary income and flows into your MAGI. If you are on ACA marketplace insurance during the bridge years, a large SEPP payment can push you above the subsidy cliff and cost you more in lost premiums than you save by avoiding the penalty. Running both numbers together before committing to a SEPP amount is essential.
The Rule of 55 is often a better option than SEPP if you left your last employer in or after the year you turned 55. That rule allows penalty-free withdrawals from that specific employer's 401k only, with no fixed payment requirement. SEPP is the right tool when you have already rolled funds into an IRA or when the Rule of 55 does not apply.
Frequently asked questions
What is a 72(t) SEPP?
A 72(t) SEPP — Substantially Equal Periodic Payments — is an IRS provision that lets you withdraw money from a traditional IRA or 401k before age 59½ without paying the normal 10% early withdrawal penalty. You must take fixed, equal payments for the longer of five years or until you reach age 59½, and you cannot change or stop the payments without triggering retroactive penalties on everything already withdrawn.
What are the three SEPP calculation methods?
The IRS allows three methods. The RMD method divides your account balance by your IRS life expectancy factor each year, producing the lowest and most variable payment. The fixed amortization method calculates a fixed annual payment using an amortization formula based on your balance, life expectancy, and a chosen interest rate. The fixed annuitization method uses a similar formula with an IRS mortality table annuity factor, producing results nearly identical to amortization. Most people choose amortization because it offers a higher fixed payment that is easier to plan around.
How long must I take SEPP payments?
You must continue taking substantially equal periodic payments for the longer of five years or until you reach age 59½. If you start at age 52, you must continue until age 59½ — seven and a half years. If you start at age 57, you must continue until age 62 — five full years. Stopping early or changing the payment amount triggers the 10% penalty retroactively on every payment you have already taken, plus interest from the IRS.
What interest rate should I use for SEPP?
The IRS allows you to use any interest rate that does not exceed 120% of the applicable federal mid-term rate for either of the two months immediately preceding the month your SEPP begins. The IRS publishes these rates monthly. A higher rate produces a larger annual payment. Many people use a rate between 4% and 6% depending on current market rates.
Does SEPP income affect my ACA subsidy or IRMAA?
Yes. SEPP distributions from a traditional IRA or 401k count as ordinary income and are included in your MAGI. This means they can affect your ACA premium tax credit if you are on marketplace health insurance, and if you are 63 or older they will affect your Medicare IRMAA surcharges two years later. Planning your SEPP amount alongside your ACA cliff and IRMAA thresholds is important for minimizing total cost in early retirement.
See how SEPP fits your full retirement projection
ThunderHarbor models your SEPP payments inside the year-by-year projection alongside ACA subsidies, IRMAA exposure, Roth conversions, and RMDs so you can see the full tax picture across your entire retirement.
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