Required minimum distributions must be taken from a traditional IRA once an individual has reached age 70 1/2, according to the IRS. There is no required withdrawal age for a Roth IRA as distributions do not have to be taken until after the death of the owner.
The first RMD may be delayed until April 1st following the year that the IRA owner turns 70 1/2, according to the IRS. All subsequent distributions must be taken by December 31st each year, including the year in which the first RMD was delayed, making it possible to have two RMDs in one year. RMDs are calculated by dividing the prior December 31st account balance by a life expectancy factor published in IRS tables. RMDs are generally included in taxable income.