The appellants challenged an application judge's decision denying them interest on legacies under their father's will.
The testator's final will left monetary legacies of $530,000 each to his two daughters and the residuary estate to his son.
The daughters challenged the will on grounds of undue influence but were unsuccessful.
They then claimed entitlement to interest on their legacies under the common law "rule of convenience," which provides for interest on legacies delayed beyond one year from the testator's death.
The application judge exercised discretion to deny interest, citing the daughters' status as estate trustees and their role in causing delay through the will challenge.
The Court of Appeal allowed the appeal, holding that the "rule of convenience" applied and that the application judge erred in principle by linking entitlement to interest to the reasonableness of distribution within the executor's year, by giving undue weight to the will challenge, and by characterizing interest as a reward or penalty.