After you meet with an estate planning attorney and the last will is drafted and executed, the attorney is likely to tell you to make sure that you review the will, when changes occur in your life.
Most people just take the attorney's statement at face value and leave it at that. Other people want to know what kind of things would make changing a last will necessary.
There are a few common things that can happen. They can be listed as the Huntsville Item does in "When should you review your will?" The problem with making specific lists, is that people take them as exclusive, instead of as examples. People think only those things listed would require changing a will, when those things are just some of the common examples.
A last will should be reviewed and changed, anytime there is a significant change in your life that would make you want to dispose of your estate differently. You do not need to think too hard about what counts as a significant change. It just needs to be something you find significant.
One way you can avoid having to think about when to review your last will, is to just go ahead and review it every few years. Read through it and if it no longer does what you want, the way you want, then schedule another appointment with the estate planning attorney so changes can be made.
Reference: The Huntsville Item (May 7, 2018) "When should you review your will?"