If you are age 701/2 or over and own either a traditional IRA, 401(k) plan or other employment-based savings plan, you are usually required to withdraw a certain amount of money each year. These withdrawals are minimum required distributions (MRD), or what can also be referred to as required minimum distributions (RMD). For consistency purposes, I will refer to them as minimum required distribution (MRD). MRD is usually taxable income, so if you made after-tax contributions to these accounts, part of your minimum required distribution may be nontaxable.