You may need to get tested before age 50 if colorectal cancer runs in your family. Most people can stop getting screened after age 75. Talk with your doctor and ask about your risk for colorectal cancer. How often should I get screened? How often you get screened will depend on your risk for colorectal cancer. It will also depend on which screening test is used. There are different ways to test for colorectal cancer. Some tests are done every 1 to 3 years. Other tests are done every 5 to 10 years. Your doctor can help you decide which test is right for you and how often to get screened.