I’d suggest retaining the records for 2 years after the individual’s employment ends since that’s the statute of limitations for bringing wrongful dismissal and other employment claims in BC. Exception: Claims for acts or omissions committed before June 1, 2013, are still subject to the old statute of limitations of 6 years. As a result, you might want to hang onto performance reviews provided on or before that date for 6 years after the employment ends.
Hope that helps and sorry to keep you waiting so long. Glenn