72(t) SEPP: The Early-Access Tool of Last Resort

Substantially Equal Periodic Payments unlock your IRA at any age with no penalty. They also handcuff you to a fixed payment for up to a decade. Here's the math, and why the flexibility you give up usually matters more than the penalty you avoid.

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Every FIRE forum thread about accessing retirement money early eventually lands on 72(t). It sounds like a cheat code: take "substantially equal periodic payments" from your IRA and the 10% early-withdrawal penalty simply doesn't apply, at 45, at 50, at any age. No five-year wait like a conversion ladder. No employer-plan requirement like the Rule of 55.

The catch isn't hidden — it's structural. A SEPP schedule is a commitment device with the IRS as counterparty, and the commitment runs one direction: theirs to enforce, yours to keep.

The Math: Amortization Method, Worked Example

The IRS blesses three ways to compute the payment (Rev. Rul. 2002-62, updated by Notice 2022-6): the RMD method, fixed amortization, and fixed annuitization. Amortization usually pays the most, so it's the default choice for people who actually need the income.

The formula is a plain mortgage-style amortization: level payments that would exhaust your balance over your single life expectancy, at a chosen interest rate. Notice 2022-6 caps the rate at the greater of 5% or 120% of the federal mid-term rate — so 5% is always available.

Take a 50-year-old with a $500,000 IRA using 5%. The IRS Single Life Table (Pub 590-B, Table I) gives a 50-year-old a life expectancy of 36.2 years:

payment = 500,000 × 0.05 / (1 − 1.05^−36.2)
        = 25,000 / 0.829019
        ≈ $30,156 per year

About 6% of the balance, every year, as ordinary income. That's the number — computed once, from the starting balance, and then frozen. It does not recalculate when markets move, and it does not adjust for inflation.

The Lock-In

Once payments start, they must continue for the longer of five years or until you reach 59½. Start at 57 and you're locked until 62. Start at 50 and you're locked for nearly a decade.

"Locked" means exactly the schedule: not more, not less, not paused. Take an extra $5,000 from that IRA in year six because the roof failed? That's a modification, and the penalty is retroactive: the IRS recaptures the 10% penalty on every payment you've taken since the schedule began, plus interest. Our 50-year-old who breaks the schedule at 58 owes roughly 10% × 8 × $30,156 ≈ $24,000 in recaptured penalties, plus interest, in one tax year. The tool's failure mode costs more than the problem it solved.

There are two escape hatches. You're allowed a one-time switch to the RMD method, which recalculates annually on the actual balance — useful if markets crash and the fixed payment is draining a shrunken account, but it typically cuts the payment substantially. And if the account is emptied by the payments themselves, the depletion safe harbor applies: running out of money is not a modification, the schedule just ends.

Why the Inflexibility Bites

The fixed nominal payment is the quiet problem. At 3% inflation, $30,156 buys about $23,000 of today's goods by year nine. Your spending presumably grows with inflation; your SEPP doesn't. The gap has to come from somewhere — and if "somewhere" is the same IRA, that's a modification.

It also runs the other way: the payment arrives every year whether you want the income or not. It's a mandatory income floor — you can't skip a year to duck under an ACA threshold, and you can't Roth-convert money the schedule is obligated to pay out. For a decade, a slice of your tax return is spoken for.

The practitioner's standard mitigation is to split the IRA first: carve off exactly the balance that produces the payment you need and run the SEPP on that account only, leaving the rest unencumbered (and available for a second SEPP later if needed). The rules apply per account, and sizing the account is legitimate; sizing the payment by fudging inputs is not.

When Something Else Beats It

• Rule of 55. If you separate from your employer in or after the year you turn 55, that employer's 401(k)/403(b) is penalty-free immediately — with no fixed schedule and no lock-in. If you're 54 and can hold on a year, this dominates. (Corollary: don't roll that 401(k) into an IRA and forfeit it.)
• Roth conversion ladder. If you have five years of runway in taxable or Roth basis, the ladder gets traditional money out penalty-free with full year-by-year control over amounts and MAGI.
• Just paying the penalty. Heresy, but arithmetic: a one-time $20,000 withdrawal costs $2,000 in penalty. A ten-year SEPP obligation entered to avoid $2,000 is a bad trade. SEPPs earn their keep when you need sustained income from traditional money with no other bridge — which is why "last resort" is the right frame.

Which bridge you need depends on the age you are trying to reach; the FIRE calculator works that age out with the early-access rules modeled.

How retireclarity Models This

72(t) is built into the projection engine as an opt-in, per person: enable the "72(t) early withdrawals (SEPP)" card in Accounts and choose a start age (40–59). The card then prices both modeled methods side by side — fixed amortization (with an interest rate, default 5%) and the RMD method, recomputed each year from that year's balance — and computes the payment from that person's tax-deferred balance in the first payment year, or from just the accounts you tick if you have split off a dedicated SEPP IRA — the $30,156 example above is literally the engine's own test case — and then enforces it like an RMD: a mandatory distribution floor, fixed in nominal dollars, running through the longer of five years or 59½. SEPP dollars are penalty-exempt; withdrawals beyond the floor before 59½ still get the 10% penalty priced in. Payments are ordinary income, feed the ACA MAGI in bridge years, and cap how much of the balance remains convertible. If the account depletes mid-lock, the engine pays a final partial payment and ends the schedule — the depletion safe harbor.

Simplifications, per the Modeling Notes and the Guide:

• You choose which accounts the payment is sized on, but the plan still draws from the pooled balance. The 72(t) card lists that person's tax-deferred accounts and lets you tick only the ones the schedule runs from — so the split-IRA carve-out above is expressible, and a $700,000 401(k) sitting beside your $115,000 rollover IRA no longer inflates the payment. Every box toggles freely, including a 401(k) or 403(b) — the row says a SEPP usually needs that money in an IRA first, and the plan warns you if you size a schedule on an employer plan anyway, but it is your plan and the choice is yours. What it still doesn't do is fence the account off: the projection withdraws from the aggregate tax-deferred pool rather than tracking each account separately, so the selection caps the payment without isolating a balance.
• Fixed annuitization is not modeled. Two of the IRS's three methods are: fixed amortization and the RMD method, with its annual recalculation. The third needs a mortality table the app doesn't ship, and it produces a figure between the other two. The one-time switch into the RMD method is expressible — record the year your schedule actually started and pick that method — but it is a whole-schedule choice, so a projection can't show the payment stepping down mid-lock.
• The rate is your input. The actual 120%-of-mid-term-rate ceiling floats monthly; the app ships the current ceiling as a dated snapshot and warns when your rate is above it, but the rate in the projection is always the one you chose (default 5%, the Notice 2022-6 floor).
• Breaking the schedule isn't modeled — the engine keeps the schedule by construction, so retroactive recapture never appears in a projection. In real life, that's the risk that should scare you most.
• The 59½ convention is annual: the whole calendar year of attainment is treated as penalty-free.

Model it before you commit to it. The 72(t)/SEPP calculator computes your payment instantly from a balance, an age and a rate — and then puts the schedule inside a full plan, because a SEPP looks very different as a line in a 40-year projection — where you can see the fixed payment interact with inflation, taxes, ACA subsidies, and everything else — than it does as a formula in a forum post.

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Related Articles

• The Roth Conversion Ladder, Modeled Honestly — The flexible alternative, if you have five years of runway.
• The ACA Bridge: Health Insurance from Early Retirement to Medicare — Why a mandatory SEPP income floor complicates subsidy planning.
• The RMD Problem: Why Your IRA Might Cost More in Taxes Than It's Worth — The late-life version of forced distributions.

From the Guide: Retiring Before 59½ · Modeling Notes