72(t) Tax Code: Calculation Methods, Rate Cap, and Rule of 55

The 72(t) early withdrawal penalty exception lets you pull money from an IRA or a former employer’s retirement plan before age 59½ without owing the 10% additional tax, provided you take the money as substantially equal periodic payments (SEPP) calculated under one of three IRS-approved methods. Regular income tax still applies to each distribution. What disappears is the penalty. The catch is a long commitment: once payments begin, you must continue them for the later of five full years or until you reach 59½, and almost any deviation retroactively undoes the whole benefit.¹²

What the Exception Saves You

Any distribution from a qualified retirement plan before age 59½ normally triggers a 10% additional tax on the portion included in gross income, layered on top of ordinary income tax. A $50,000 withdrawal at age 52 means income tax plus a $5,000 penalty. Section 72(t)(2)(A)(iv) removes that penalty when the withdrawals are structured as a series of substantially equal periodic payments made at least annually over your life expectancy, or the joint life expectancies of you and a beneficiary.²

Which Accounts You Can Use

Traditional IRAs, SEP IRAs, and SIMPLE IRAs are all eligible, and your employment status is irrelevant for these. You can start a SEPP from an IRA while still working.²

Employer-sponsored plans like 401(k)s and 403(b)s add a condition: you must have separated from the employer sponsoring the plan before distributions can start. If you’re still on the payroll, that plan is off limits for SEPP. After you leave, you can either run SEPP directly from the plan (if the plan permits it) or roll the balance into an IRA and begin from there.²

The Three Calculation Methods

Your choice of method determines both your annual payment and how fast the account draws down.

Required minimum distribution (RMD) method. You divide the account balance by a life expectancy factor each year. Because the balance changes annually, so does the payment. This method usually produces the smallest checks.
Fixed amortization method. You amortize the account balance over a life expectancy period using a permitted interest rate. The annual payment is a level dollar amount that does not change for the life of the plan.
Fixed annuitization method. You divide the balance by an annuity factor built from mortality tables and a permitted interest rate. Payments are also level, though the exact amount differs from the amortization result.

All three methods draw on an account balance as of a valuation date and a life expectancy figure. The life expectancy tables live in IRS Publication 590-B (the Single Life Table, the Uniform Lifetime Table, and the Joint and Last Survivor Table), and which one you use depends on whether you’ve named a beneficiary and how your ages compare.³²

The Interest Rate Cap

Both fixed methods require an assumed interest rate, and the IRS limits how high you can go. The rate cannot exceed 120% of the federal mid-term rate for either of the two months immediately before the month your distributions begin.⁴ As of April 2026, 120% of the federal mid-term rate is 4.59%.⁵

A higher permissible rate means larger annual payments under amortization or annuitization, so the rate environment when you start shapes what income you can generate. You can select any rate up to the cap, including zero, but under the fixed methods the rate you lock in stays for the duration of the plan.

How Long You’re Locked In

The commitment runs for the longer of five full years or the date you reach 59½. Starting at 50 means paying out until 59½, roughly nine and a half years. Starting at 57 means continuing until 62, not 59½.¹

During that period the account is effectively sealed. No new contributions. No withdrawals outside the scheduled amount. No rollovers into the account. The only balance changes the IRS accepts are the investment gains and losses that happen on their own.²

Splitting an IRA Before You Start

The IRS calculates each SEPP from a single account. You cannot combine multiple accounts into one payment figure, but you can run separate SEPPs from separate accounts, and each stands on its own.²

That opens a useful planning move. Before starting SEPP, you can split a large IRA into two or more IRAs through a trustee-to-trustee transfer, then apply the 72(t) calculation only to the account sized to produce the income you actually need. The other IRA keeps growing without SEPP restrictions, available if you’re willing to pay the 10% penalty on withdrawals from it before 59½. The split has to happen before your first SEPP distribution. Once a SEPP is running, you cannot move money in or out of that account.

The One-Time Method Switch

If you started with fixed amortization or fixed annuitization and the payments are draining the account faster than you expected, the rules let you switch to the RMD method in any later year. This switch does not count as a modification and does not trigger the recapture tax.⁴

Because the RMD method recalculates each year against the current balance, switching typically lowers your payments when the balance has fallen, which can keep the account alive through a long market drop. You only get one such switch. After that, any further change is a modification.

What Counts as a Modification

Break the plan before the commitment period ends and the penalty comes back with interest. Every distribution you’ve already taken under the plan loses its penalty-free status, so the IRS applies the 10% additional tax retroactively to each prior year’s payment as if the exception had never existed, plus interest on the back taxes for the entire deferral period.²

A modification includes taking more or less than the calculated amount in a given year, adding money to the account, rolling funds in or out, or any other change to the balance beyond normal investment fluctuations. The recapture tax hits in the year the modification occurs, and with interest compounding across what may be a decade of distributions, the bill can be large.¹

Narrow exceptions apply. Modifications caused by death or disability do not trigger recapture. And if the account balance drops to zero from the scheduled payments themselves, the SEPP is generally treated as complete rather than modified.

Reporting the Exception on Your Return

You claim the SEPP exception on IRS Form 5329, filed with your Form 1040 by the normal deadline including extensions. In Part I, enter exception code 02 to identify the distributions as substantially equal periodic payments.⁶⁷

File this form every year the SEPP is active, not just the first. The custodian’s Form 1099-R coding does not always reflect SEPP status accurately, and without your Form 5329 the IRS may assess the 10% penalty based on that coding alone.

Check the Rule of 55 First

If you separated from your employer during or after the calendar year you turned 55, distributions from that employer’s plan are already exempt from the 10% additional tax without any SEPP mechanics. For qualified public safety employees the age drops to 50.⁶

The Rule of 55 has real limits. It applies only to the plan of the employer you separated from, not to IRAs, and only if the separation falls in the right calendar year. Where it fits, though, it is far more flexible than a SEPP: no fixed payment schedule, no five-year lock-in, no recapture risk. SEPP remains the main tool for people retiring before 55. For those retiring at 55 or later from an employer plan, the Rule of 55 usually beats it.

1
Office of the Law Revision Counsel. 26 U.S.C. 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
2
Internal Revenue Service. Substantially Equal Periodic Payments
3
Internal Revenue Service. Publication 590-B – Distributions from Individual Retirement Arrangements (IRAs)
4
Internal Revenue Service. Determination of Substantially Equal Periodic Payments
5
Internal Revenue Service. Section 7520 Interest Rates
6
Internal Revenue Service. 2025 Instructions for Form 5329
7
Internal Revenue Service. Instructions for Form 5329