The figures of the Parliamentary Budget Officer differ from ours by about 10%. If I am not mistaken, he uses the Social Policy Simulation Database and Model. It is a model that is available at Statistics Canada and which is probably not as precise as the administrative base used at the Department of Finance. There are a few differences that are among other things probably caused by the sources of the data. However, in general, his results were not very far from ours.
On April 12th, 2016. See this statement in context.