Estimate substantially equal periodic payments (SEPP) under IRS Section 72(t) so you can tap your IRA or 401(k) before age 59½ without the 10% early withdrawal penalty. Compare all three IRS-approved methods side by side.
Jane is 50 with a $500,000 Traditional IRA. She wants to retire early and needs income before 59½. She compares all three methods using 5% as the reasonable interest rate and the IRS Table I factor of 34.2 for age 50.
RMD Method: $500,000 ÷ 34.2 = $14,619.88/year ($1,218.32/month)
Fixed Amortization (5%, 410.4 months): $30,544.03/year ($2,545.34/month)
5-Year Rule: Age 59½ is 9.5 years away, longer than 5 years — so payments must continue for 9.5 years, until Jane turns 59½.
The RMD method gives the smallest payment and is recalculated each year; amortization locks in a higher fixed payment based on the 5% assumed rate.
Mark is 45 with a $1,200,000 rollover IRA. He stops working at 45 and plans to use a SEPP until normal retirement. His Table I factor at 45 is 38.8, giving 465.6 months of life expectancy.
RMD Method: $1,200,000 ÷ 38.8 = $30,927.84/year ($2,577.32/month)
Fixed Amortization (5%): $70,116.75/year ($5,843.06/month)
5-Year Rule: Age 59½ is 14.5 years away, so payments must run for 14.5 years — committing to ~$70k of withdrawals every year, regardless of market performance.
Because he's so far from 59½, any change triggers retroactive penalties on every distribution taken so far.
Priya is 55 with a $750,000 401(k) that she rolls into a Traditional IRA. Her Table I factor at 55 is 29.6, or 355.2 months of life expectancy.
RMD Method: $750,000 ÷ 29.6 = $25,337.84/year ($2,111.49/month)
Fixed Amortization (5%): $48,596.45/year ($4,049.70/month)
5-Year Rule: Age 59½ is only 4.5 years away, shorter than 5 years — so the 5-year rule applies and payments must continue for at least 5 full years (until age 60).
Priya also has the "age 55 exception" (penalty-free 401(k) withdrawals after separating from service at 55+) worth comparing with professional advice.
Under IRC Section 72(t)(2)(A)(iv), distributions that are part of a series of substantially equal periodic payments (SEPP) made at least annually over the account owner's life expectancy (or joint life expectancy) are exempt from the 10% early withdrawal penalty. The IRS permits three calculation methods.
With the same interest rate and the same life expectancy term, the amortization and annuitization formulas above are algebraically equivalent, so this calculator shows identical monthly payments for both. In practice, many practitioners use the Fixed Annuitization method with an annuity factor from an IRS mortality table, which can produce a different (often lower) payment. Consult a tax professional to confirm which interpretation fits your situation.
Substantially Equal Periodic Payments — a series of at least annual distributions calculated using an IRS-approved method and taken over the owner's life expectancy.
The extra tax on retirement distributions taken before age 59½. A valid 72(t) SEPP plan exempts your payments from this penalty.
Once started, the SEPP must continue for at least 5 years or until you turn 59½, whichever period is longer. Starting after 59½, only the 5-year minimum applies.
The calculation method and interest rate are chosen once and cannot be modified. Changes or a lump-sum withdrawal can retroactively trigger the 10% penalty plus interest.
A 72(t) SEPP plan lets you withdraw money from tax-deferred retirement accounts like a Traditional IRA, 401(k), or 403(b) before age 59½ without the 10% early withdrawal penalty. It is authorized by IRC Section 72(t)(2)(A)(iv), which waives the penalty for distributions that are part of a series of substantially equal periodic payments (SEPP) made at least annually over the account owner's life expectancy.
This is one of the most powerful tools for early retirees who need income before the normal retirement withdrawal age. Without a 72(t) plan, a 45-year-old withdrawing $50,000 from an IRA would owe a $5,000 penalty on top of ordinary income tax. With a properly structured SEPP, that penalty does not apply.
The IRS requires that your withdrawals meet three core tests: (1) payments are made at least annually, (2) the amount is calculated using one of the three IRS-approved methods (RMD, Fixed Amortization, or Fixed Annuitization), and (3) the payment series lasts for the required minimum period — the longer of 5 years or until you turn 59½.
The 10% penalty is waived, but your SEPP withdrawals remain ordinary taxable income. A 72(t) plan does not make distributions tax-free — plan for the tax bill each year.
You can keep working while running a SEPP. The plan is based on the account balance and your life expectancy, not on employment status.
Your choice of method determines your annual payment — and it is irrevocable. Once you choose a method and an interest rate, you cannot switch. Here is how the three methods compare for a 50-year-old with a $500,000 IRA at a 5% reasonable interest rate (IRS Table I factor 34.2):
| Method | Annual Payment | Monthly | Payment Type | Best For |
|---|---|---|---|---|
| RMD | $14,619.88 | $1,218.32 | Recalculated yearly — varies with balance | Smallest guaranteed commitment; flexible |
| Fixed Amortization | $30,544.03 | $2,545.34 | Fixed every year for the full term | Higher, predictable income |
| Fixed Annuitization | $30,544.03 | $2,545.34 | Fixed every year for the full term | Predictable income via annuity factor |
The RMD method produces the smallest first-year payment but adjusts every year as your balance changes. The Fixed Amortization and Fixed Annuitization methods produce larger, locked-in payments — attractive when you need consistent income, but risky if the market drops, since you must keep withdrawing the fixed amount even from a shrunken balance.
⚠️ Know Before You Lock In: With amortization and annuitization, the payment is fixed regardless of investment performance. If your account loses value, you may be forced to sell assets at a loss to fund the required payment, or risk a retroactive penalty if you stop or reduce payments.
The RMD method and both fixed methods use your life expectancy to determine payments. The IRS publishes the Single Life Expectancy Table (Table I) in IRS Publication 590-B. Find your attained age to get your factor. For the RMD method, Payment = Balance ÷ Factor. For the fixed methods, months = Factor × 12 and the reasonable interest rate is applied. The full table (ages 0–115):
| Age | Factor | Age | Factor |
|---|---|---|---|
| Loading... | |||
Source: IRS Publication 590-B, Table I — Single Life Expectancy. Figures are the unrounded life expectancy multiples published by the IRS.
Once your SEPP begins, you are locked in. The rules are strict, and the IRS enforces them retroactively. Here is what you need to know before starting.
Your SEPP must continue for the longer of 5 years or until you reach age 59½. Practically:
The IRS treats the following as a modification that breaks the plan: changing the calculation method, changing the interest rate, taking a lump-sum distribution from the SEPP account, stopping payments early, or reducing payments below the required amount. Even an accidental over-withdrawal of the RMD method's recalculated amount can cause problems.
If your plan fails, the IRS applies the 10% early withdrawal penalty retroactively to all distributions taken before age 59½, plus interest on those penalties — potentially a devastating tax bill years after the fact. In limited cases the IRS permits corrections (death, disability, or IRS-approved "fresh start" for the RMD method), but you should never rely on that.
⚠️ Serious Commitment: A 72(t) SEPP is one of the most restrictive early-withdrawal strategies available. Because the method and rate are irrevocable and the failure penalties are retroactive, it is essential to model your payments carefully (as this calculator does) and to confirm your plan design with a CPA or enrolled agent before taking the first distribution.
Setting up a compliant plan takes a few deliberate steps. Here is the process most financial professionals recommend:
Compare 72(t) with alternatives: the Rule of 55 (penalty-free 401(k) withdrawals after separating from service at 55+), a Roth conversion ladder (wait 5 years per conversion), or using taxable savings first. Each has different trade-offs between access, taxes, and flexibility.
Pick the IRA or former-employer 401(k) you will draw from. A dedicated account keeps the SEPP clean and auditable, leaving other accounts untouched and flexible.
Decide between the RMD, Fixed Amortization, or Fixed Annuitization method. Use the current 120% of the Applicable Federal Mid-Term Rate (≈4.8–5.2% for 2025) or another reasonable rate. Remember: the decision is permanent.
Use this calculator to model the annual and monthly payment for each method at your chosen rate, and make sure the payment fits your budget — because it will not change (for the fixed methods) regardless of what the market does.
Distributions must be made at least annually. Monthly or quarterly payments are common. Set up automatic distributions so you never miss a required payment.
Mark the calendar: your SEPP ends after 5 years or age 59½, whichever is longer. After that, you can withdraw freely (subject to normal tax rules) without penalty concerns.
⚠️ Important Disclaimer: This 72(t) SEPP Calculator is for informational and educational purposes only. It provides estimates based on the IRS Single Life Expectancy Table (Table I), IRC Section 72(t), and assumed reasonable interest rates. Results do not constitute tax, legal, or financial advice. SEPP plans are irrevocable, and failure to follow IRS requirements — including the 5-year rule, payment frequency, and modification restrictions — can result in the 10% early withdrawal penalty being applied retroactively, plus interest. Consult with a qualified tax professional or CPA before starting, modifying, or stopping any 72(t) distribution plan.