The simplest form of life insurance is called Term Insurance. Term takes its name from the notion that it is purchased simply for a term (period of time), after which is it no longer renewable. Not that long ago the general rule was term products were renewable to age 75 and that was it. More recently this has been reviewed and some companies are offering term products that can be renewed past this date. This is also governed by state insurance law so you should check on this for your specific state.