As long as you are healthy, birth control pills can be taken for as long as you need right until you hit menopause. This also applies to combination and progestin-only birth control pills for women who are nonsmokers and progestin-only birth control pills for younger women who are smokers. However, if you're 35 and above or have certain medical conditions such as blood-clotting disorders, it is not recommended for you to be on birth control pills.

Reference: http://www.mayoclinic.org/healthy-lifestyle/birth-control/expert-answers/birth-control-pills/faq-20058110/