When it comes to IRAs and workplace plans, the concept of the “required beginning date” (RBD) is a “really big deal” again.
The RBD is the first date you’re required to start required minimum distributions (RMDs). For traditional IRAs, the RBD is April 1 of the year following the year you turn age 72. (But if you were born before July 1, 1949, your RBD was April 1 of the year after the year you turned 70 ½.) There are no lifetime RMDs for Roth IRA owners, so they are always considered to have died before the RBD with respect to their Roth IRAs.