Marriage, Divorce, and Remarriage
Obviously, a marriage usually brings a new beneficiary into the picture, and a divorce may remove one. Some of the changes in a will prompted by a change in marital status may not be so apparent. For example, when a widow or widower remarries, the will may need to be updated to show how children from the previous marriage and the new spouse are to be provided for.

Additions and Subtractions
A new child is a new beneficiary, but a will can and should cover more than just the distribution of property to heirs. Parents can name a guardian, and even an alternate guardian, to care for their children in the event that something happens to both parents. Absent such a provision in a will, a court will appoint a guardian.

The death of an executor, guardian, beneficiary, or trustee creates a gap in how the will is supposed to operate. Fill in the gaps by making necessary changes, such as naming a new individual or, in the case of a deceased beneficiary, simply removing the lost beneficiary from the will.

Changing Fortunes
If you enjoy an unexpected windfall, you may still want the larger pie divided up as before. But it is likely that some changes in your will are called for. If the increase in the potential estate is large enough, it might trigger the need for planning to avoid or minimize estate taxes. A reversal of fortune also could suggest some changes. For example, you may have to revise downward that fixed sum you were planning to leave to a favorite charity.

Moving Out of State
You will not have to start from scratch if you move to another state, because all of the states recognize a will that was properly created in another state. Nonetheless, legal advice should be sought in the new state because changes in the law from state to state could require some tinkering with the will. There may be more than tinkering involved if you move to or from a community property state.

Changes in Tax Laws
The Government's intentions can change even if your intentions have not. Some of the changes benefit individuals with wills, but you can take full advantage of them only if you are aware of them. The big item here is the schedule of changes to the federal estate tax exemption, which is the amount an estate can reach before it is subject to a (hefty) estate tax. The good news is that the exemption is headed up. It goes from the current $1.5 million to $2 million in 2006.

You Change Your Mind
If you decide you want to change beneficiaries, a guardian, an executor, or anything else in a will, you can do so. For example, you want to make sure that the beneficiaries in your will are the same as the beneficiaries you have named in your insurance policies and retirement accounts. Otherwise, the beneficiaries actually named in those documents will get the money from them, not the beneficiaries under the will. Bear in mind that no amount of talking about your new intentions will make them happen. The changes must be indicated in a properly executed will.

You should keep the finished (at least until the next update) product in a safe place. When "they" say "keep this with your important papers," think of your will. Your family should know where to find the executed will. An unsigned copy of your will in its latest form is a good starting point for the next periodic review.