The plan can then be crafted according to the customized life expectancy factors, rather than generic assumptions. (kitces.com)
For each year after, you would subtract one year from the initial life expectancy factor. (fidelity.com)
A RMD for a year is calculated by dividing the market value of your 401 (k) account - as of December 31 of the prior year - by a life expectancy factor. (employeefiduciary.com)