When Do I Have to Start Withdrawing From a Traditional IRA?
While you can begin making qualified withdrawals from a traditional IRA at age 59½, you must start taking withdrawals that are known as "required minimum distributions" by April 1 following the calendar year in which you turn 70 ½. The amount of the distribution depends on how much you have saved in the account and your life expectancy, according to tables published by the IRS.
That's a major difference between a traditional IRA and a Roth IRA. If you own a Roth, you can leave the money in for as long as you want.