This also depends on how complex your financial status is. This is another complicated area. It depends on how much control and how you want to leave your benefits to your beneficiary. For most financial instruments such as 401(k), life insurance, there is a designated beneficiary already. It is about real estate (also depends on how this is set up) and other personal assets that you own. At the very minimum, consider writing your healthcare directives. That is super important given how complex our medical treatment and end-of-life procedures are nowadays.