Retirement Withdrawal Strategy: RMDs, Roth Conversions, and 72(t) SEPPs Explained

Saving for retirement is a straightforward equation — earn, invest, compound. Withdrawing from retirement is not. The accounts you've built over decades are structured with different tax treatments, different IRS rules, and different long-term implications depending on the order and timing of withdrawals. A retiree who ignores these decisions can pay significantly more in lifetime taxes than one who sequences them well.

This guide covers the four main levers of retirement withdrawal strategy — RMDs, Roth conversions, the 72(t) SEPP for early access, and the inherited IRA rules — with the math behind each decision and the calculators to model your own numbers.

An RMD forces you to take a minimum distribution from tax-deferred retirement accounts every year once you pass the starting age — whether you need the income or not. The IRS has been deferring taxes on your contributions and growth for decades; the RMD system is the mechanism for collecting those taxes while you're still alive.

The divisor shrinks every year as you age, which means the required withdrawal percentage rises even if the account balance stays flat. At 73 you're drawing roughly 3.8% of the prior balance; by 80 that rises to 5.0%; by 85 to 6.25%. The table is calibrated to roughly exhaust a median-growth account over your expected remaining lifespan.

The First-RMD Timing Decision

Your first RMD can be delayed until April 1 of the year after you reach your RMD start age. But this apparent benefit has a catch: if you delay, you must take two RMDs in the following year — your delayed first RMD by April 1 and your second-year RMD by December 31. Two large distributions in one year can push you into a higher bracket, trigger Medicare IRMAA surcharges, and increase the amount of your Social Security benefits subject to income tax. Most financial planners recommend taking the first RMD in the year you reach RMD age, not delaying it.

Strategies to Manage RMD Tax Burden

• Roth conversions before RMDs start — the single most effective strategy. Converting a portion of your traditional IRA to Roth before age 73 permanently reduces the balance subject to RMDs. See Section 3 below.
• Qualified Charitable Distributions (QCDs) — if you're 70½ or older, you can direct up to $108,000 per year (2026) from your IRA directly to a qualifying charity. A QCD counts toward your RMD but is excluded from taxable income — unlike regular distributions, which count as income even if donated later.
• Reinvesting the excess — if you don't need the RMD income, you can immediately reinvest the after-tax amount in a taxable brokerage account. This gets the money out of the RMD calculation for future years.
• Avoid postponing the first RMD — the dual-RMD tax spike in the delay year almost never makes sense. Take the first one in the year you reach the RMD start age.

"The years between retirement and age 73 are often the most powerful tax-planning window of your lifetime — and most people don't use them."

— We Are Calculator editorial team

Roth conversion is the process of moving money from a traditional IRA (or 401k) to a Roth IRA, paying ordinary income tax on the converted amount today, so that all future growth and withdrawals are tax-free. The conversion itself is straightforward — the strategy behind when and how much to convert is where the value is.

When Roth Conversion Makes Sense

The low-income year advantage: Converting $30,000 when your taxable income is $40,000 costs $5,752 at an effective rate of 19.2%. That $24,248 enters the Roth and grows tax-free. Over 20 years at 7%, it becomes $93,830 in the Roth vs. an estimated $90,551 after-tax in the traditional account — a $3,280 Roth advantage even on a relatively modest amount. The advantage grows significantly with larger conversions done at lower rates and longer time horizons.

The Bracket-Filling Strategy

Rather than converting a fixed dollar amount, many retirees "fill the bracket" — converting exactly enough to bring total taxable income to the top of their current bracket, without spilling into the next one. In 2026, the 12% bracket ends at $48,475 for single filers and $96,950 for married filing jointly. If your income is $30,000, you have $18,475 of 12% bracket room left. Converting up to that amount costs 12 cents per dollar in federal tax — and those Roth dollars grow tax-free forever.

If you retire before 59½ and need to access your IRA without paying the 10% early withdrawal penalty, a 72(t) SEPP (substantially equal periodic payment) is one of the few IRS-sanctioned options. You set up a series of equal annual payments from the IRA, calculated using an IRS-approved method, and maintain that exact payment for the longer of 5 years or until you turn 59½.

Worked example — Age 52, $600,000 IRA, 5% interest rate, Single Life Table:

• Single Life factor at age 52: 34.3
• RMD method: $600,000 ÷ 34.3 = $17,493/year (recalculated annually)
• Fixed Amortization: Locked at $36,927/year for the full SEPP period
• Minimum SEPP duration at age 52: 7.5 years (until 59½)
• Modification-free from age 59.5

Alternatives to Consider Before Starting a 72(t)

• Rule of 55 — if you leave your employer in or after the year you turn 55, you can access that specific employer's 401(k) penalty-free without a SEPP commitment. More flexible, but only applies to the plan of the employer you just left.
• Roth contributions — the basis (contributions, not earnings) in a Roth IRA can always be withdrawn tax- and penalty-free at any age. If you've built up Roth contributions, that may bridge early retirement without a SEPP.
• Taxable brokerage account — no withdrawal rules, no IRS schedules. If you have a taxable account, using that first while leaving the IRA to grow often makes more sense than a locked SEPP.
• Substantially Equal Periodic Payments from a 401(k) — possible but complicated. Many plans don't cooperate with SEPP schedules. An IRA is the cleaner vehicle if you decide to proceed.

Inheriting an IRA introduces an entirely separate set of rules that override the standard distribution framework. The rules depend on who you are relative to the deceased owner, and — critically — whether the owner died before or after their Required Beginning Date (the April 1 deadline following the year they reached RMD age).

Non-Spouse Designated Beneficiaries (Most Common Case)

If you inherited an IRA from someone other than your spouse and the death occurred in 2020 or later, the 10-year rule applies. You must deplete the entire account by the end of the 10th year after the year of death. Whether you also owe annual RMDs during years 1–9 depends on whether the original owner had passed their Required Beginning Date:

Worked example — age 50 beneficiary, $500,000 inherited IRA, owner died after RBD:

• Single Life Table factor at age 50: 36.2
• Year 1 RMD: $500,000 ÷ 36.2 = $13,812
• Year 2 (assuming 5% growth, divisor drops to 35.2): ~$14,503
• Annual RMDs continue through year 9; full remaining balance due in year 10

Eligible Designated Beneficiaries — The Stretch Exception

The following categories can still use the life-expectancy "stretch" strategy, spreading distributions over their own lifetimes instead of the 10-year rule:

• Surviving spouses (who have additional options including rollover to their own IRA)
• Minor children of the deceased owner (until age of majority, then a 10-year clock begins)
• Disabled or chronically ill individuals (as defined under IRC §72(m))
• Individuals not more than 10 years younger than the deceased owner

The textbook withdrawal order — taxable first, then traditional, then Roth — maximizes tax deferral by letting the tax-free Roth compound as long as possible. But this sequence has important exceptions:

• The Roth conversion window: In low-income years before 73, it may be better to accelerate traditional IRA withdrawals (or convert to Roth), even if you don't need the income, specifically to reduce future RMDs. This inverts the standard sequence deliberately.
• The RMD mandate: Once you hit 73, the traditional IRA's sequence is no longer entirely your choice — RMDs come out whether you want them to or not. Plan around that forced income.
• Social Security coordination: Social Security benefits are taxed (up to 85%) when your combined income exceeds certain thresholds. Large traditional IRA withdrawals can push you over those thresholds. Roth conversions done before Social Security starts may reduce this interaction.
• Estate planning: Roth IRAs pass income-tax-free to beneficiaries (though still subject to the 10-year rule). If leaving assets to heirs is a priority, preserving the Roth while spending down the traditional account makes sense.