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Municipal Property Assessment Corporation

The Municipal Property Assessment Corporation (MPAC) administers property assessments and appeals of assessment in the province of Ontario, Canada. MPAC determines the assessed value for all properties across Ontario. This is provided in the form of an Assessment Roll, which is delivered to municipalities throughout the province on the second Tuesday in December. Municipalities then take the assessment roll, and calculate property taxes for each individual property in their jurisdiction.

MPAC history
Pre-1970 Although property assessment originally came under the jurisdiction of Upper Canada, it was transferred to Ontario municipalities in 1849. Over time, each municipality developed its own assessment system and methods of valuing property. This resulted in inconsistencies in property assessment and the distribution of property taxes. Within a municipality, properties with a similar appearance and value could have very different assessments. There were also very different assessments from municipality to municipality. In 1963, the Provincial Government appointed the Ontario Committee on Taxation to study taxation and recommend changes. Its report, published in 1967, highlighted many inequities in the assessment system. ==See also==
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