Most people know that administering the estate of a deceased person is easier if there is a will. Of course, if you have worked to build up your assets you ought to make a will, so that your money goes to the people that you want it to go to, and making a will is also a good opportunity for inheritance tax planning.
Often people have complex lives and this means that they are best served by a complex will which covers all the eventualities. These kinds of wills are not simple; the drafting of them requires great care, otherwise the beneficiaries may be disappointed and the person who made the will may not see all his or her intentions expressed correctly, from a legal standpoint.
A well drawn will with some appropriate tax planning will save many more times than it has cost, in the long run.