
Form 5329 and the Missed RMD: How SECURE 2.0's 25%/10% Penalty Rules Work
SECURE 2.0 cut the missed-RMD excise tax from 50% to 25%, and to just 10% if the shortfall is corrected within a two-year window. Form 5329 is how taxpayers claim the reduced rate or request a full reasonable-cause waiver, and the form also starts the IRS's three-year limitations clock.










