The Netherlands has annual reassessments, Denmark’s are biannual, and Sweden’s are every 3 years.

It’s been 6 years in Ontario.

Fair and productive property taxes require both good initial assessment and periodic re-evaluation to reflect changes in value.

These delays are contributing to an unfairness in our tax system and subsidizing the rich at the expense of the poor.

See this paper for more great information on property taxes and their reform: https://tspace.library.utoronto.ca/bitstream/1807/81246/1/imfg_paper_21_slack_bird_sept19_2015.pdf

Non paywall link: https://archive.ph/2023.07.24-120044/https://www.thestar.com/news/investigations/doug-ford-s-compromising-ontario-s-economic-competitiveness-with-property-assessment-delay-business-leaders-warn/article_6aea2cdf-7874-526b-80c9-bd5aa5db79d8.html