When a person passes away with a will, that person is called ‘testate’. Without a will that person is called ‘ intestate’.
Most provinces have laws which governs how the estate of an intestate person is to be divided. If you are satisfied with this government imposed disposition regime then you do not need a will; however, it probably will cost your beneficiaries more money and aggravation to administer the estate.
Depending upon how well you have planned your estate and if you have a will and if all the property is going to your spouse, a lot of the time you do not even have to probate a will.
Having a will not only let you decide how you wanted your estate divided upon your death, but the vast majority of times, a will makes the administration of the estate easier and the costs less.