Your income increased over the years. That does not mean that you will definitely be required to retroactively adjust upwards your child support payments. Many people believe that if your income has gone up, then a retroactive adjustment simplistically and automatically follows. Keown v. Mainer (Man. Q.B.) reminds us that the analysis here is much more nuanced. A careful reading of the Supreme Court of Canada decision of S. (D.B.) v. G. (S.R.) (known as "D.B.S." for short which is extensively referenced in Keown v. Mainer, assists in the analysis. To help one understand the factors at play, read Keown v. Mainer. If you are a really keen investigator, then try to read D.B.S.. This blog post can be your basic introduction to the retroactive child support issue.