Tax-Efficient Withdrawal Order for Early Retirees

The standard advice — draw from taxable accounts first, then tax-deferred, then Roth — was written for people retiring at 65. If you retire at 50, you have a 10–20 year window before Social Security kicks in, before RMDs start at 73 or 75, and before Medicare begins at 65. During that window, your taxable income may be the lowest it will ever be for the rest of your life.

How you use that window determines whether you pay $200,000 or $600,000 in lifetime taxes. The right answer is almost never "drain taxable first, leave everything else alone." It's a coordinated annual blend: spend from taxable, convert traditional IRA to Roth at the lowest bracket you'll ever see, harvest capital gains at 0%, and stay below the cliffs that trigger the ACA subsidy loss or IRMAA surcharges.

2026 Bracket Headroom Calculator

Enter your filing status and any other expected income this year. The calculator shows how much traditional IRA you can convert — and how much in capital gains you can harvest — while staying within the tax bracket you choose.

The four tax cliffs early retirees must navigate

Early retirement income planning isn't just about which bracket you're in — it's about the step-functions that create sudden, large changes in your effective cost:

1. The 12%→22% bracket jump. Ordinary income (including Roth conversions) taxed at 12% up to $50,400 in taxable income (single) / $100,800 (MFJ) in 2026.¹ Above that threshold, every additional dollar costs 22% instead of 12% — a 10-percentage-point jump. If your traditional IRA will generate $60,000/year in RMDs starting at 73, you're probably paying 22% or 24% then. Converting now at 12% is a guaranteed spread.
2. The 0% long-term capital gains window. Long-term gains (and qualified dividends) are taxed at 0% as long as your total taxable income stays at or below $49,450 (single) / $98,900 (MFJ) in 2026.¹ If you've held index funds for years in a taxable account, early retirement may be the only time you can reset your cost basis at zero federal tax cost.
3. The ACA subsidy cliff. ACA marketplace premium subsidies phase out — sharply — once your MAGI exceeds 400% of the federal poverty level, approximately $62,600 for a single adult in 2026.³ Cross that line and you lose thousands in subsidies immediately. Roth conversions count as MAGI. For early retirees depending on ACA coverage before 65, this cliff often sets the ceiling for how much you can convert each year. See the full analysis in our Healthcare Before 65 guide.
4. The IRMAA lookback. Once you reach Medicare at 65, Medicare Part B uses your income from two years prior to set your premium. In 2026, MAGI above $109,000 (single) / $218,000 (MFJ) triggers surcharges — your $202.90/month base Part B premium can more than double.² The two-year lookback means that large conversions at age 63 or 64 will show up as higher Medicare costs at 65. Build that into your timeline.

Why "taxable first, then traditional, then Roth" isn't wrong — it's just incomplete

The traditional withdrawal sequence was designed to maximize tax deferral. By spending taxable accounts first, you let tax-deferred money compound longer. That logic made sense when retirement lasted 20 years and RMDs were a manageable trickle.

Early retirement breaks that logic in two ways:

• RMDs compound into a problem. If you retire at 50 with $1.5M in a traditional IRA and let it compound for 23 more years at 7%, you'll have $7.7M when RMDs begin at 73. The IRS-mandated distribution on $7.7M is roughly $280,000/year — fully taxable as ordinary income, likely at 22–32%. If you had converted $80,000/year for those 23 years at 12%, you'd have eliminated most of that RMD burden and paid a fraction of the tax.
• You have a low-income window that closes. In your first years of early retirement, before Social Security, before RMDs, your taxable income may be near zero. The 12% bracket is wide open. That window shrinks permanently once SS starts (typically at 62–70) and closes further when RMDs begin. The optimal strategy uses the window, not ignores it.

Phase 1 (Years 0–15): The Roth conversion window

This is the highest-leverage phase. Your income floor is at its lowest — typically just investment income from your taxable account and any part-time work. The playbook:

• Cover spending from taxable first. Living expenses come from the taxable account. This avoids triggering ordinary income tax on traditional IRA withdrawals you don't need right now. It also gradually lowers the taxable account balance, which means lower annual dividends and capital gains distributions — more room for conversions.
• Convert traditional IRA to Roth up to the bracket ceiling. Each year, calculate your remaining 12% bracket headroom and convert that amount from your traditional IRA. If you have no other income and you're single, that's up to $66,500 AGI ($50,400 taxable income + $16,100 standard deduction). If the ACA cliff is binding, limit conversions to stay below $62,600 MAGI — even if there's bracket room left.
• Harvest capital gains at 0%. After accounting for any conversion, check how much LTCG room remains before hitting the 15% threshold. If you have appreciated index funds in taxable, sell and immediately repurchase to reset cost basis — with zero federal tax cost. This "tax-gain harvesting" reduces future capital gains exposure permanently.

Phase 2 (When Social Security begins): Adjusting the mix

Social Security adds a new complication: provisional income rules. Up to 85% of Social Security benefits are taxable as ordinary income once your provisional income (AGI + tax-exempt interest + 50% of SS) exceeds $34,000 (single) / $44,000 (MFJ).⁴ That threshold is not inflation-adjusted and hasn't moved in decades.

For most early retirees with $1M+ portfolios, 85% of SS will be taxable. Factor that in when sizing conversions in the years just before SS begins — those are often the last high-headroom years.

Once SS starts:

• Your income floor rises, which reduces conversion headroom at lower brackets.
• Conversions may still be worth doing at 22% if your future RMD rate is 24–32%.
• IRMAA planning becomes more critical as you approach 63–64.

Phase 3 (RMDs at 73 or 75): When the IRS decides for you

Under SECURE 2.0, RMDs begin at age 73 for anyone born 1951–1959, and at age 75 for anyone born 1960 or later.⁵ Roth accounts (except inherited ones) have no lifetime RMDs. By the time RMDs start, the goal of the prior phases was to have converted enough traditional IRA balance that RMDs are manageable — not a forced tax event at 24–32%.

If you've used the early retirement window well, you arrive at 73 with a smaller traditional IRA, a larger Roth, and RMDs that stay in the 12–22% range instead of forcing you into higher brackets. That outcome requires planning in your 50s, not your 70s.

Coordinating with your Roth conversion ladder

If you're relying on a Roth conversion ladder for pre-59½ access — converting traditional IRA money and accessing it tax- and penalty-free five years later — each conversion serves double duty: it provides future spending access AND reduces your traditional IRA balance. Size each year's conversion to serve both goals: fill the bracket ceiling, but ensure enough of those conversions are seasoning for 5-year access when you need them.

If you're using 72(t) SEPP for current IRA access, those distributions count as ordinary income and reduce your conversion headroom for the year. You can still convert additional amounts above the SEPP, but the SEPP amount eats into your low-bracket room first.

What an advisor can do that a calculator can't

The mechanics above are well-defined. The complexity is in coordinating them simultaneously:

• Your state income taxes may treat Roth conversions differently from ordinary income or SS benefits.
• Large conversion years can trigger estimated tax penalties if not planned for.
• The optimal ACA vs. conversion tradeoff depends on your specific health situation — a major medical year may make maintaining ACA subsidies worth far more than the conversion tax savings.
• Roth conversion amounts affect provisional income calculations for SS, which affects taxability of future SS benefits — a loop that requires multi-year modeling.
• The IRMAA 2-year lookback means a conversion at 63 affects Medicare costs at 65; coordinating the right year matters.

If you're managing $1M+ across multiple account types, a fee-only advisor who specializes in early retirement can run multi-year projections that account for all of these interactions simultaneously. The tax savings often far exceed the advisory cost.