72(t) SEPP Calculator

The three calculation methods: what they produce and how to choose

The 72(t) distribution rules are unforgiving. Get the calculation wrong even once and the IRS recaptures all the taxes on every prior distribution, plus a 10% penalty on the whole amount. Start with the method selection, because that decision drives the annual payment amount and you're locked in.

The three IRS-approved methods are the Required Minimum Distribution method, the Fixed Amortization method, and the Fixed Annuitization method. They produce very different payment amounts from the same starting IRA balance.

The RMD method divides your account balance by the applicable life expectancy factor each year. The payment recalculates annually as the balance changes, so it's variable and not truly "fixed." It tends to produce the lowest distributions. Good for someone who wants to minimize distributions and isn't relying on the IRA as the primary income source.

The Fixed Amortization method amortizes the account balance over the single life expectancy at an interest rate up to 120% of the applicable federal rate. The payment is calculated once and stays fixed for the life of the plan, regardless of what the account balance does. This typically produces the highest distributions of the three methods.

The Fixed Annuitization method uses an IRS annuity factor (from Revenue Ruling 2002-62) to calculate the payment. Results are typically similar to the amortization method, sometimes slightly higher or lower depending on the exact annuity factor published for the month you start. Both the amortization and annuitization methods lock in the interest rate when you start; using the highest allowable rate (120% of mid-term AFR) maximizes the payment.

Real numbers: $500,000 IRA, age 50, 4.5% rate

The gap between the RMD method and the amortization method is over $15,000/year on a $500,000 balance. The right choice depends entirely on how much income you actually need. Taking $30,000/year when you only need $15,000 means drawing down the account faster and paying more tax than necessary. Taking $15,000/year when you need $30,000 means the SEPP covers less than half your income need.

The interest rate matters significantly for the amortization and annuitization methods. You can use any rate up to 120% of the IRS mid-term applicable federal rate (AFR) published in the two months before your first distribution. In a higher rate environment, 120% of AFR might be 5-6%, producing larger allowable distributions. Check the current AFR on IRS.gov before starting a plan; locking in at the higher of the two preceding months can meaningfully increase your annual payment.

The commitment period: when you're free

You must continue distributions for the longer of five years or until you reach age 59.5. Start at 50, and you're locked in until 59.5 -- nine and a half years. Start at 57, and you're done at 62 (five years, since 62 is later than 59.5). Start at 56, same deal: five years gets you to 61, which is past 59.5, so five years is the binding constraint.

The plan ends on the date you satisfy both conditions simultaneously. After that date, you can modify, stop, or change the amount freely. The modification trap springs before that date. If you take one extra distribution, miss one distribution, change the payment amount by even a dollar, or add or remove accounts from the plan, the IRS treats it as a modification. The 10% penalty applies retroactively to every distribution you took in the plan from the beginning, plus interest accruing from each distribution date.

There is one permitted modification under IRS Notice 2022-6: you can switch from the amortization or annuitization method to the RMD method once, without triggering the modification penalty. Going the other direction (RMD to amortization) is a modification. The one-time switch to RMD exists to help people who need to reduce distributions, not increase them.

The IRA splitting strategy

You don't have to subject your entire IRA to a SEPP plan. You can split your IRA into two separate accounts before starting: one designated for the SEPP, one left alone. The SEPP calculation is based only on the designated account's balance. The non-SEPP IRA sits untouched, growing tax-deferred, and becomes fully accessible at 59.5 without any penalty or commitment.

This is often the right approach for someone who has a $900,000 IRA and needs $25,000/year. Rather than subjecting the full $900,000 to a SEPP that produces $55,000/year (more than needed, more taxes, faster depletion), split off a $400,000 IRA for the SEPP. The SEPP produces roughly $24,000/year, close to the target, and $500,000 stays completely free.

The split must happen before the first SEPP distribution. Once the plan is established on an account, you can't add or remove funds from it. Plan the account balance carefully; the distribution amount is fixed from that starting balance.

When a SEPP makes sense, and when it doesn't

SEPP works for people who retired early, rolled a large 401(k) to an IRA, and genuinely need regular income from it before 59.5. The FIRE community uses it. So do early retirees from corporate jobs with seven-figure IRAs and minimal other income.

It doesn't work well if your income need is unpredictable. Health crises, business opportunities, family situations, real estate moves: any of these might create a year where you need the distribution to be different. The SEPP has no mechanism for that. If you can't commit to the exact same payment every year for up to nine years, SEPP is a trap waiting to spring.

Check the Rule of 55 first. If you left an employer at age 55 or later and have a 401(k) with that employer, you can take distributions from that specific plan penalty-free with no commitment and no fixed schedule. Rolling it to an IRA eliminates this option, so check before you roll. The Rule of 55 is simpler, more flexible, and doesn't expose you to retroactive penalties.

Frequently asked questions