So, for instance, if you took out a 20 year term life insurance policy at age 25 and it was guaranteed not to go up in price for the full 20 years, it would go up at age 45.
If the term life policy was guaranteed not to go up for 10 of the 20 years, there is a chance that it could go up at age 35.
Basically, after your initial term of your policy ends, the annual renewal premium of the policy would increase each year when you renew your coverage.
Usually, level term life insurance plans offer guaranteed level premiums for a period of 10, 15, 20 or 30 years.