Required minimum distributions, often referred to as RMDs or minimum required distributions, are amounts that the federal government requires you to withdraw annually from traditional IRAs and employer-sponsored retirement plans after you reach age 70½ (or, in some cases, after you retire).
You can always withdraw more than the minimum amount from your IRA or plan in any year, but if you withdraw less than the required minimum, you will be subject to a federal penalty.
The RMD rules are calculated to spread out the distribution of your entire interest in an IRA or plan account over your lifetime. The purpose of the RMD rules is to ensure that people don't just accumulate retirement accounts, defer taxation, and leave these retirement funds as an inheritance. Instead, required minimum distributions generally have the effect of producing taxable income during your lifetime.