Roth Conversion at 60: Your 15-Year Window Starts Now

Turning 60 is one of the most consequential years in Roth conversion planning. You've crossed the 59½ threshold that eliminates early-withdrawal penalties. If you're in the 1960-or-later cohort, your RMD age is 75 — giving you a full 15-year golden window. And for ages 60–63, SECURE 2.0 unlocks a "super catch-up" contribution limit of $35,750/year to an employer plan — more raw material to convert or shelter. This guide explains what changes at 60, how to map the three phases of your conversion window, and what the math looks like in practice.

What changes at 60

Three things shift materially at age 60 — or more precisely, at 59½ — that reshape your Roth conversion strategy.

1. No more early-withdrawal penalty on any IRA distribution. Before 59½, withdrawing from a traditional IRA (or accessing Roth conversion earnings within the first 5 years of the conversion) triggers a 10% early-withdrawal penalty under IRC § 72(t). After 59½, that penalty is gone permanently — from both traditional IRA withdrawals and Roth conversion earnings.¹

This matters for Roth conversions in one specific way: the per-conversion 5-year penalty clock (Rule 2 of the 5-year rules) only penalizes distributions made before age 59½. Once you're 60, Rule 2 is completely irrelevant. Any converted amount — no matter when it was converted — can be withdrawn without penalty. The only remaining rule is Rule 1: earnings on your Roth account are tax-free after 5 years from the year of your first-ever Roth contribution or conversion. If your first Roth year was 2021 or earlier, your earnings are already accessible tax-free.¹

2. Super catch-up contributions unlock (ages 60–63). If you're still working, SECURE 2.0 § 109 gives employees aged 60–63 a higher 401(k) or 403(b) catch-up limit: $11,250 vs the standard $8,000 for ages 50–59 and 64+.² Maximum total 401(k) contribution in 2026: $35,750 ($24,500 base + $11,250 super catch-up). This is the largest employer-plan contribution window of your working career. Maxing this reduces current-year taxable income and creates more tax-deferred assets to convert in the golden window ahead.

3. A 15-year conversion runway begins. Born in 1960 or later? Your RMD age is 75 under SECURE 2.0 § 107.² Someone turning 60 in 2026 (born in 1966) has 15 years before the first required minimum distribution. That's a long runway to methodically convert traditional IRA balances at the lowest available rates — before RMDs begin stacking income on top of Social Security and pushing you into 32%+ territory.

The three-phase conversion window at 60

The golden window isn't uniform. At 60, it breaks into three distinct phases with different binding constraints:

An important IRMAA timing note for the Phase 1 to Phase 2 transition: IRMAA uses a two-year lookback — your 2026 income affects Medicare premiums in 2028, not 2026. If you turn 65 in 2031 (born 1966), IRMAA first hits based on your 2029 income. That means conversions at ages 60–62 have zero IRMAA exposure — you won't be on Medicare when the lookback period applies. Conversions at age 63 (in 2029) will affect 2031 Medicare premiums. This is a 3-year IRMAA-free window inside Phase 1 that most pre-retirees at 60 don't realize they have.

The ages 60–63 super catch-up: use it if you're still working

If you haven't fully retired yet, the ages 60–63 super catch-up deserves its own section. This 4-year window — available under SECURE 2.0 § 109 — lets you contribute $35,750 to a 401(k) or 403(b) in 2026, compared to $32,500 for ages 50–59 and 64+.²

The direct tax benefit: at a 32% combined rate (federal + state), the extra $3,250/year super catch-up saves about $1,040/year in current-year taxes. That's not the main value. The main value is that this pre-tax balance goes into the conversion funnel. Every dollar contributed pre-tax at 32%+ will ideally be converted during the golden window at 20–24% — locking in a rate differential that compounds inside the Roth account forever.

The super catch-up also applies to SIMPLE IRAs ($17,600 base + super catch-up for ages 60–63) and SEP IRAs (through the solo 401(k) contribution rules for self-employed individuals). It does not apply to IRA contributions — the IRA catch-up for ages 50+ is $1,000 on top of the $7,000 base limit, unchanged.²

Bracket math at 60: how much room do you have?

How much you can convert at a given rate depends almost entirely on what other income you have coming in. The 2026 federal brackets for the most common filing statuses:

Source: IRS Rev. Proc. 2025-32.⁵ Standard deductions 2026: $16,100 single, $32,200 MFJ.

A quick calculation framework: take the taxable income ceiling for your target bracket, subtract the standard deduction to get the MAGI ceiling, then subtract your other income (part-time work, dividends, rental income, capital gains) to find your annual conversion room.

Example — MFJ couple, filling the 22% bracket: MAGI ceiling for the 22% bracket = $206,700 + $32,200 standard deduction = $238,900 MAGI. With $45,000 other income, conversion room = $238,900 − $45,000 = $193,900/year. But in Phase 1 (on ACA), the real ceiling is $84,600 MAGI (400% FPL cliff for 2 persons), leaving only $39,600/year for conversions — at a blended rate around 11–12%.

This is the core tension at age 60: ACA subsidies constrain conversions to very low amounts in Phase 1, but conversions during those years happen at remarkably low effective tax rates (sometimes 10–12%). Phase 2 allows much larger conversions at somewhat higher rates.

Worked example: David & Lisa, recently retired at 60

David (60) and Lisa (60) retired in early 2026. Born in 1966, both have RMD age 75 and a 15-year golden window.

Their situation:

• Combined traditional IRA: $1.5M
• Other annual income: $40,000 (portfolio dividends and interest)
• Social Security: both plan to delay to 67 (David, estimated $32,000/year) and 65 (Lisa, estimated $22,000/year)
• No pension; both on ACA Marketplace through age 64
• MFJ; 2026 standard deduction $32,200⁵

Phase 1 strategy (ages 60–64): ACA-constrained, very low effective rate

The 400% FPL cliff for 2 people is $84,600 MAGI in 2026.³ Exceeding this eliminates all premium tax credits and can trigger repayment of advance credits already received. David and Lisa convert just up to the cliff:

• Annual conversion: $84,600 − $40,000 other income = $44,600/year
• MAGI: $84,600; taxable income: $84,600 − $32,200 = $52,400
• Federal tax on $52,400: 10% × $23,850 + 12% × $28,550 = $2,385 + $3,426 = $5,811
• Federal tax on $40,000 other income alone: $40,000 − $32,200 = $7,800 taxable → 10% × $7,800 = $780
• Incremental tax on the $44,600 conversion: $5,811 − $780 = $5,031 → 11.3% effective rate on the conversion

Over 5 years (Phase 1), they convert roughly $223,000 at approximately 11% federal. No IRMAA exposure during this period — they won't be on Medicare until David turns 65 in 2031.

Phase 2 strategy (ages 65–74): IRMAA-constrained, moderate effective rate

David turns 65 in 2031. IRMAA Tier 1 for MFJ in 2026 is $218,000; assume similar thresholds going forward. Social Security hasn't started (Lisa delays to 65, David to 67), so non-conversion income is still roughly $40,000.

• Annual conversion ceiling (below IRMAA Tier 1): $218,000 − $40,000 = $178,000/year
• Tax on $178,000 conversion (MAGI $218,000, taxable $185,800 after $32,200 deduction): approximately $36,000 federal → ~20.2% effective rate on the conversion

Over 10 years (Phase 2), they convert roughly $1.78M — which exceeds their starting IRA balance, meaning Phase 1 + Phase 2 together should clear the entire $1.5M in traditional IRA. They enter RMD age with most or all savings already in Roth, avoiding RMDs entirely on the converted amounts.²

What they avoid: Without conversions, a $1.5M IRA growing at 6% reaches roughly $2.4M by age 75. Their year-1 RMD (ULT divisor for age 75: 24.6) is $97,600. Add Social Security (both filing, 85% taxable = $45,900) → combined ordinary income of ~$143,500, minus $32,200 deduction = $111,300 taxable. Federal tax: approximately $21,000 — and growing every year. IRMAA surcharges near-certain. By contrast, Roth IRA has no RMDs in their lifetimes and passes to heirs tax-free.

Common mistakes at age 60

1. Converting too much in ACA years. Crossing the 400% FPL cliff ($84,600 MFJ for 2 people) by even $1 eliminates all premium tax credits for the year — a sudden $10,000–$20,000 cost. Convert up to but not through the cliff during ACA years.
2. Ignoring the IRMAA lookback during the Phase 1 → 2 transition. Conversions at age 63 will appear on your 2029 return and affect Medicare premiums in 2031 (when you turn 65). Don't do a large "catch-up" conversion at 63 without modeling the IRMAA cost two years later.
3. Waiting until retirement to start. If you're 60 and still working, you can convert existing IRA balances even while actively employed. In-service distributions from an IRA have no employment-status restriction. Starting conversions at 60 rather than 62 can add two low-rate years to your total.
4. Forgetting capital gains stacking. If you have appreciated taxable investments and plan to harvest gains, coordinate with conversions. A Roth conversion raises your MAGI, which can push long-term capital gains out of the 0% bracket and into the 15% bracket. See the capital gains stacking guide.
5. Not paying taxes from outside the IRA. The conversion dollar should land entirely in the Roth account. Withholding from the IRA to pay taxes permanently removes that amount from the conversion, reducing the long-term compounding benefit. Pay from your taxable brokerage or checking account.