One of the colossal failures in estate planning I witness when people make their wills is not coordinating the will with the overall beneficiary designations they have chosen.
Does your will surpass your beneficiary designations on financial accounts?
A recent Wall Street Journal article, titled "How People Undermine Their Own Written Will," explains that most people believe that their written will take priority and supersedes the beneficiary designations on their investments. This isn't true. When you designate a beneficiary on a life insurance policy, a 401(k) plan, or an IRA—that is a binding contract. The basic tenants of contract law apply just as it would in a mortgage or a sale. What this means is that if you stipulate in your will that you want to leave your IRA to your brother and the beneficiary designation form of your IRA says that it is all supposed to pass to your sister, then your brother is out of luck. Despite your explicit instructions in your will, the IRA will go to the named beneficiary.