The BasicsAs you get older life insurance costs more. A 25 year old male would pay less in premiums than a 26 year old male if they were buying the same type and amount of life insurance. Yearly renewable term insurance is the closest thing to pure life insurance. The premiums are very low.
The problem with this though is that the older you get the more it costs. Eventually the cost of your policy can be quite prohibitive. If you therefore want a policy just for one year that is fine but if you plan on keeping it longer you should anticipate premium increases.
It is not recommended that you keep a yearly renewable term longer than 5 years.