Your plan administrator may calculate the distribution and send you the money automatically. By Kimberly Lankford, Contributing Editor September 30, 2014 I’m 71 and need to take my required minimum distribution from my former employer’s 401(k) by the December 31 deadline. Do I have to calculate how much to withdraw, or will the plan do it automatically and send me the money? If the plan does it, do I have a say in which investments to sell?SEE ALSO: 5 Costly Retirement Surprises Some 401(k) administrators do calculate the required minimum distribution for plan participants each year, based on their IRS life expectancy and account balance at the end of the previous year. They also send you the money automatically if you haven’t withdrawn it already. T. Rowe Price, for example, calculates how much you must take each year and processes the distribution in late December. It keeps track of distributions you’ve already received from the account throughout the year, and if you haven’t withdrawn enough it sends you any amount necessary to make up the difference. Other administrators distribute the money automatically only if you’ve signed up for the automatic-withdrawal option. Ask your 401(k) administrator about its procedures. How investments are tapped also varies by administrator. Some take a portion of the money from each mutual fund that your 401(k) is invested in unless you specify otherwise. Some, including T. Rowe Price, leave it to individual employers to decide how investments are tapped for their plan -- unless you specify otherwise. Advertisement If you keep a large sum in a stable value or money market account for your retirement expenses, it’s important to make sure that your administrator will take the withdrawals from the appropriate account rather than from more-volatile mutual funds. That way, you won’t have to worry about selling at a loss to cover your required distributions. Required distributions from traditional IRAs have slightly different rules. With 401(k)s, you must calculate the required distribution for each account and make separate withdrawals from each account (that makes it easier for administrators to know how much to withdraw automatically). With IRAs, however, you calculate the required distributions from each account, but you may take the money from any of your accounts. Got a question? Ask Kim at email@example.com.