This proposed amendment would provide that where there is a dispute in respect of an insured person’s entitlement to, or amount of statutory accident benefits, interest on overdue SABS payments is calculated at the prejudgment interest rate described in the Courts of Justice Act that is used for past pecuniary loss, and is payable from the date on which a mediation proceeding is commenced and ends on the date a settlement is reached or a decision is issued that finally disposes of the dispute.
http://www.ontariocanada.com/registry/view.do?postingId=15542&language=en
Courts of Justice Act, s.127
Postjudgment and Prejudgment Interest Rates
http://www.attorneygeneral.jus.gov.on.ca/english/courts/4th_Quarter_2014_CJA_Pre_Postjudgment_Int