As a general rule in tax litigation, the initial onus is on the appellant-taxpayer to “demolish” the Minister’s assumptions that form the basis of the disputed assessment. This initial onus is met where the appellant makes out at least a prima facie case. If this is done, the burden then shifts to the Minister to prove, on a balance of probabilities, that the assumptions were correct. The primary reason for this rule is that the taxpayer generally has the best knowledge of his/her own affairs in a self-reporting tax system.
However, the TCC has held that the initial onus may not be on the taxpayer in the context of so-called “derivative assessments” such as assessments against directors pursuant to director’s liability provisions for underlying corporate assessments (ss. 323 ETA and 227.1 ITA) and against transferees pursuant to non-arm’s length transfer rules for underlying assessments against the transferor (ss. 325 ETA and 160(1) ITA).