Roth vs Traditional IRA in your 60s: RMD planning and the last conversion window
Your 60s contain the last meaningful Roth conversion window before Required Minimum Distributions start at 73 under SECURE 2.0 §107 (rising to 75 in 2033). Social Security claim timing, IRMAA premium brackets, the qualified charitable distribution after 70.5, and Medicare enrolment all interact with the IRA tax-bucket mix. This is the decade where strategic Roth conversions pay back the most cleanly.
The RMD timeline in 2026
Required Minimum Distributions from Traditional IRAs and pre-tax 401(k)/403(b) start at age 73 under SECURE 2.0 §107. Anyone born in 1953 reaches RMD age in 2026; their first RMD is due by 1 April 2027 (or 31 December 2026 if they prefer not to bunch two RMDs into the same calendar year). Subsequent RMDs are due by 31 December each year.
Starting 1 January 2033, the RMD age moves to 75 for anyone born in 1960 or later. People born in 1954 through 1959 stay at age 73. The age-75 transition applies only to those born 1960 or later, creating an awkward gap where a 1959-born retiree starts RMDs at 73 in 2032 while a 1960-born retiree waits until 75 in 2035.
The first-year RMD divisor under the IRS Uniform Lifetime Table is 26.5 at age 73, meaning the RMD is roughly 3.8% of the prior-year-end IRA balance. The percentage rises slowly each year: 4.0% at 75, 4.7% at 78, 6.3% at 85, 8.8% at 90. A $1 million Traditional IRA at 73 generates about $37,700 of forced taxable income annually, rising over time as the divisor shrinks and balances grow.
Roth IRAs (and starting 2024, designated Roth balances in 401(k)/403(b) plans per SECURE 2.0 §325) have no RMD requirement during the original owner's lifetime. The key strategic point: every dollar converted from Traditional to Roth in your 60s eliminates that dollar from the future RMD base. For a 65-year-old with $1.5M in Traditional IRA, converting $400K to Roth over five low-income years between 65 and 70 reduces the eventual RMD base by 27% and reduces the corresponding ordinary-income tax burden in your 70s and beyond.
The Social Security claim timing interaction
Social Security can be claimed as early as 62, at Full Retirement Age (typically 66 to 67 depending on birth year), or as late as 70. Each year of delay between FRA and 70 adds roughly 8% to the eventual monthly benefit. For someone whose FRA benefit is $2,800 monthly, claiming at 70 instead of 67 raises it to about $3,472 monthly, an extra $8,064 per year for life.
Delaying Social Security is also delaying a substantial chunk of ordinary income. The years between retirement and Social Security claim are low-income years, the ideal Roth conversion window. A retiree with $800,000 Traditional IRA, $200,000 cash, and a $2,800 FRA Social Security benefit who delays claim to 70 has roughly 5-8 years of very low ordinary income (just dividend and interest income from the $200K cash). Converting $80K to $100K per year of Traditional IRA to Roth during this window fills the 12% and 22% brackets cleanly.
Once Social Security starts, the conversion math degrades. Social Security itself adds $36,000 to $42,000 of ordinary income depending on benefit size. Filling brackets on top of that means converting at higher marginal rates. The pre-Social-Security window is the clean conversion opportunity that disappears once you claim.
The IRMAA Medicare premium cliff (revisited)
IRMAA (Income-Related Monthly Adjustment Amount) raises Medicare Part B and Part D premiums for higher-income enrollees with a 2-year lookback. Your 2026 IRMAA bracket is determined by your 2024 modified adjusted gross income. The thresholds are cliff-edged: $1 over a threshold can mean $1,000+ of higher annual premiums.
For Part B in 2026, the no-surcharge cap is approximately $106,000 single and $212,000 MFJ (CMS updates these annually). The next tier adds about $74/month per enrollee. The top tier adds nearly $419/month per enrollee, or about $10,000 per couple per year of higher premiums. A poorly timed Roth conversion that pushes your MAGI just $1 over a cliff costs the next IRMAA tier of premium for the full year.
Practical implication for someone in their 60s: conversion planning must include the IRMAA cliff. Convert up to the bracket-fill target, but stay below the next IRMAA threshold. The conversion tax saved at 22% must not be erased by an extra $1,776 or $5,000 of Medicare premium for the next year. Run the numbers both ways.
The 2-year lookback also means conversions in your early 60s (before Medicare at 65) do not trigger IRMAA at all. Conversions at 63 feed into the 65 lookback. Conversions at 62 feed into the 64 lookback (before Medicare enrolment is even relevant for non-disability). The earlier in your 60s you convert, the cleaner the IRMAA arithmetic.
Qualified Charitable Distribution from age 70.5
The Qualified Charitable Distribution (QCD) under IRC §408(d)(8) lets you direct funds from a Traditional IRA to a qualified 501(c)(3) charity starting at age 70.5. The annual cap was $100,000 originally, indexed for inflation under SECURE 2.0 §307. For 2026 the QCD cap is approximately $108,000 per IRA owner (the IRS updates this via annual notice).
The QCD is excluded from gross income entirely. This is more tax-efficient than the alternative of withdrawing from the IRA and then making a deductible charitable contribution, because the QCD does not increase AGI (which affects IRMAA, Social Security taxation, and several other AGI-driven thresholds) and works even for taxpayers who take the standard deduction rather than itemising.
The QCD also counts toward your RMD. A $50,000 RMD that you would have donated to charity anyway is more tax-efficient as a $50,000 QCD than as a $50,000 distribution taken into AGI and then deducted as an itemised charitable gift. Above-the-line exclusion beats itemised deduction in almost every case for AGI-sensitive thresholds.
The QCD applies only to Traditional IRAs, not to 401(k)/403(b). To use QCD from a workplace plan balance, roll it to a Traditional IRA first. The QCD also does not apply to Roth IRAs, because Roth IRA withdrawals are already tax-free for post-59.5 owners. The QCD is a Traditional IRA tool specifically designed to tax-efficiently extract pre-tax retirement money during charitable years.
Estate-planning case for Roth dominance
The SECURE Act of 2019 §401 eliminated the stretch IRA for most non-spouse beneficiaries and replaced it with the 10-year rule: most non-spouse beneficiaries must fully empty an inherited IRA within 10 years of the original owner's death. This applies to both Traditional and Roth IRAs.
The difference: distributions from an inherited Traditional IRA during the 10-year window are ordinary income to the beneficiary. Distributions from an inherited Roth IRA are tax-free (subject to the 5-year rule). For a beneficiary in the 24% or 32% federal bracket plus state tax, inheriting a $500,000 Traditional IRA can mean $150,000+ of tax bill over the 10-year window. Inheriting a $500,000 Roth IRA is entirely tax-free.
For a 65-year-old with significant Traditional IRA balance and adult children in high-earning years, Roth conversions in your 60s and 70s effectively pre-pay the children's ordinary-income tax on the inheritance at your bracket instead of theirs. The bequest math typically favors converting heavily if your bracket is lower than your children's bracket, and especially if your estate plan donates to charity (which can absorb pre-tax IRA money tax-free) but bequeaths the IRA balance to individuals.
FAQ
What is the RMD age in 2026?
73, under SECURE 2.0 §107. Rising to 75 starting 1 January 2033 for anyone born in 1960 or later. People born 1951-1959 use age 73.
Can I still contribute to a Roth IRA at 70?
Yes. SECURE Act of 2019 §107 removed the age limit on Traditional IRA contributions. Roth IRA never had an age limit. Anyone with earned income (or a spouse with earned income filing jointly) can contribute, subject to the standard phase-outs.
What is the QCD limit in 2026?
Approximately $108,000 per IRA owner, indexed for inflation under SECURE 2.0 §307. QCD applies only to Traditional IRAs and only starting at age 70.5.
When should I claim Social Security?
Depends on health, longevity expectation, marital status, and tax-bracket strategy. Delaying to 70 adds about 8% per year between FRA and 70. The delay also creates a low-income Roth conversion window that disappears once you claim. Married couples often benefit from claim-timing asymmetry between spouses.
Does IRMAA apply to Roth withdrawals?
No. Qualified Roth IRA distributions are not includible in income at all, so they do not enter MAGI and do not affect IRMAA. This is one of the larger long-run advantages of Roth in retirement.
Should I do Roth conversions in my late 60s?
Often yes, especially before claiming Social Security. The window from retirement to Social Security claim or to RMD age is the cleanest bracket-fill conversion opportunity most retirees ever see. The IRMAA 2-year lookback and the Medicare-enrolment timing both interact with conversion planning.
Not financial, tax, or legal advice. Figures sourced from IRS Publication 590-B, IRS Uniform Lifetime Table, IRC §401(a)(9) (RMDs), IRC §408(d)(8) (QCD), SECURE Act of 2019 §107 (age limit removal) and §401 (10-year rule for inherited IRAs), SECURE 2.0 Act of 2022 §107 (RMD age), §307 (QCD inflation indexing), §325 (Roth 401(k) RMD elimination), SSA benefit timing rules, CMS Medicare Part B premium guidance. Tax laws change. Consult a fiduciary financial advisor, CPA, or qualified retirement planner.