The standard rule is simple: take money from an IRA before age 59.5 and you owe income tax plus a 10% penalty. But IRC Section 72(t)(2)(A)(iv) creates an exception. If you take Substantially Equal Periodic Payments (SEPP) from an IRA, the penalty disappears. The catch: you have to commit to a schedule and follow it exactly. One deviation -- even a small one -- retroactively applies the penalty to every distribution you've taken.
Here's how each method works, which one produces the highest payments, and what the rules mean in practice.
The three methods
Required Minimum Distribution (RMD) method: Divides your account balance by a life expectancy factor from the IRS single life expectancy table each year. The distribution amount changes annually as your balance and the table factor change. This method produces the lowest payments of the three -- typically 3-4% of your balance annually in your 40s and 50s. It offers the most flexibility if your portfolio drops significantly, because smaller balances produce smaller required distributions.
Amortization method: Treats your IRA balance as if it were a mortgage you're paying to yourself. Using your account balance, the IRS-prescribed interest rate, and your life expectancy, it calculates a fixed annual payment that amortizes the balance over your expected lifetime. This method produces substantially higher payments than the RMD method -- often 50-100% more annually at the same account balance. The payment is fixed for the life of the SEPP plan.
Annuitization method: Uses an annuity factor from IRS tables to convert your account balance to an equivalent income stream. Produces similar payments to the amortization method, sometimes slightly higher or lower depending on the interest rate used. Also produces a fixed payment.
The interest rate
For the amortization and annuitization methods, the IRS allows you to use up to 120% of the applicable federal midterm rate (AFR) for the month of your first distribution or either of the two preceding months. You choose whichever month produces the rate you want. Since higher rates produce higher payments, most people use the highest available rate at the time they establish the SEPP. The AFR fluctuates monthly with market conditions.
Choosing the right method
Most people setting up a SEPP to replace lost income want the highest sustainable payment, which points to amortization or annuitization. The RMD method is appropriate when: (1) you have a large IRA and don't need maximum distributions, (2) you want to preserve flexibility if the market drops significantly, or (3) you're close to 59.5 and only need a short SEPP commitment.
Use the 72(t) SEPP calculator on this site to compare all three methods at your current account balance and age. The difference between the RMD method and amortization can be $10,000-$30,000 per year on a $1 million IRA.
The commitment period
Once a SEPP schedule begins, you must continue it for the longer of: (1) five years from your first distribution, or (2) until you reach age 59.5. If you're 45 when you start, you must continue until you're 50 -- five years. If you're 56 when you start, you must continue until 59.5 -- three and a half years (the five-year minimum doesn't apply because 59.5 comes later).
During this commitment period, you cannot take additional distributions from the SEPP IRA, contribute to it, or roll outside funds into it. You also cannot modify the payment schedule. A distribution of $1 more or $1 less than your calculated amount qualifies as a modification and triggers the retroactive penalty on all prior distributions, plus interest.
One-time switch
IRS Revenue Ruling 2002-62 allows one change during a SEPP: you can switch from the amortization or annuitization method to the RMD method, once. This is a valuable safety valve. If your IRA drops significantly and the fixed payment becomes unsustainable, you can switch to RMD (which scales with balance) to avoid depleting the account. You cannot switch in the other direction.
Using multiple IRAs
SEPP applies to a specific IRA, not to all your IRAs. If you have three IRAs, you can establish a SEPP on one while leaving the other two completely alone. This allows you to calibrate the exact amount you need: calculate what income you want, identify the IRA balance needed to generate it, and roll that amount into a dedicated SEPP IRA before starting. The remaining IRAs stay untouched and penalty-free to access at 59.5.
What SEPP is not
SEPP is a legitimate planning tool for people who retire early, face job loss in their 50s, or need bridge income before Social Security or a pension begins. It's not a casual withdrawal mechanism. The commitment and the retroactive penalty risk make it serious. If you need a one-time distribution, other exceptions (substantially unreimbursed medical expenses, disability, etc.) may apply with less ongoing risk. If you're setting up a SEPP, work with an advisor or CPA who has documented experience with 72(t) -- errors in calculation have cost people tens of thousands in retroactive penalties.