Updated July 28, 2026. Quick answer: Three levers genuinely shrink future RMDs: converting to Roth, giving via QCDs once eligible, and moving a slice into a QLAC. All of them work best — and the first works only — before RMDs begin.
What actually reduces the base
| Lever | Effect | Window |
|---|---|---|
| Roth conversion | Permanently removes the amount from the RMD base | Best before RMDs begin |
| QCD | Satisfies the RMD without adding to AGI | Once eligible by age |
| QLAC | Defers a slice out of the calculation | Before or during |
The conversion window closes hard. Once RMDs begin, the required amount must come out first and cannot be converted — so every conversion sits on top of forced income in the same year. The years between retiring and the required beginning age are the cheapest conversion years most people will ever have, and they do not come back.
What does not work
Moving money between IRAs, changing investments, or taking distributions early without converting them. None of those reduce the base — the last simply accelerates the tax without buying the tax-free growth a conversion does.
Giving via a QCD is the one lever that satisfies the requirement without the income appearing on your return at all.
Sources
IRC §401(a)(9) (required minimum distributions); IRC §408(d)(8) (qualified charitable distributions); IRC §4974 (excise tax on shortfalls, as amended by SECURE 2.0); SECURE Act (2019) and SECURE 2.0 (2022); final RMD regulations published 19 July 2024. Cross-checked July 2026 against professional analyses. Indexed dollar limits and correction windows are described rather than asserted.
This states what the cited authority says. It is not tax advice.