Colorectal Cancer Screening Age in Ontario: 2026 Update
If you have been searching for the colorectal cancer screening age in Ontario, there has been an important change that you should know about. As of July 1, 2026, Ontario lowered the starting age for publicly funded colorectal cancer screening for people at average risk from 50 to 45.
The change means that many people who previously would not have been due to begin routine colorectal cancer screening may now be eligible. However, the screening process is not the same for everyone. Your age, family history, symptoms and personal risk factors can all affect which test is appropriate.
When Should Colorectal Cancer Screening Begin?
For people at average risk, Ontario recommends colorectal cancer screening between the ages of 45 and 74. The main screening test for this group is the fecal immunochemical test, usually called FIT.
FIT is a test that looks for small amounts of blood in a stool sample that may not be visible to the naked eye. For eligible average-risk adults, Ontario recommends completing a FIT every two years.
An important point is that reaching age 45 does not automatically mean that everyone needs a colonoscopy. FIT is generally the first-line screening test for people at average risk who do not have symptoms.
Colonoscopy becomes particularly important when a screening result is abnormal or when a person has risk factors or symptoms that require more detailed investigation.
When Is a Colonoscopy Recommended?
A colonoscopy allows a specialist to examine the inside of the entire colon and rectum. Unlike FIT, which looks for hidden blood in a stool sample, colonoscopy allows the physician to directly examine the bowel.
A colonoscopy may be recommended following an abnormal FIT result. It may also be recommended for people with certain family-history risk factors. Ontario considers people with one first-degree relative diagnosed with colorectal cancer before age 60, or two or more first-degree relatives diagnosed at any age, to be at increased risk.
For people in these higher-risk groups, colonoscopy screening generally begins at age 40 or ten years earlier than the age at which the youngest affected first-degree relative was diagnosed, whichever comes first.
Your doctor can assess your family history and determine whether you fall into an increased-risk category.
What Happens After an Abnormal FIT?
An abnormal FIT result does not mean that you have colorectal cancer. FIT detects blood in the stool, and there are several possible reasons why blood may be present.
However, an abnormal result needs to be investigated. Ontario recommends that people with an abnormal FIT receive a colonoscopy within eight weeks.
During the colonoscopy, the physician can examine the bowel and, when appropriate, remove polyps or take tissue samples for further examination. This makes colonoscopy an important part of the follow-up process after an abnormal screening result.
It is also important to remember that routine screening is intended for people who do not have symptoms. If you have symptoms such as rectal bleeding, unexplained changes in bowel habits or other concerning gastrointestinal symptoms, you should speak to your doctor rather than waiting for routine screening.
Colorectal Cancer Screening in Woodbridge
For people living in Woodbridge, Vaughan and surrounding communities, Mackenzie Endoscopy Centre provides colonoscopy and other endoscopic services from its outpatient facility on Major MacKenzie Drive West.
If you have received an abnormal FIT result, have a family history that may put you at increased risk or have been advised by your physician to undergo a colonoscopy, your doctor can arrange the appropriate referral.
Understanding the difference between average-risk screening and diagnostic colonoscopy is important. If you are between 45 and 74 and at average risk, speak with your healthcare provider about FIT screening and whether it is appropriate for you. If you have symptoms or increased risk, your doctor can determine whether colonoscopy or another investigation is more appropriate.
Ontario’s screening recommendations can change over time, so it is important to rely on current guidance from Ontario health authorities and your healthcare professional.