I am in the process of doing our taxes using QuickTax and the good news is we are getting a big fat refund from the Canada Revenue Agency. The bad news is we have given the government an interest-free loan. Sadly, the tax refund is an annual occurence as we use up the entire RRSP contribution room religiously every year.

To find out how much the interest-free loan cost me, I ran a quick calculation: Let’s say I am expecting a $6,000 refund on my taxes, which works out to $500 per month. I am also assuming that I can get a 5% risk-free, tax-free return by making a lump-sum prepayment on our mortgage. That works out to $216.45 in lost interest over a period of 15 months.

Since, every little bit adds up, I am going to file T1213 with CRA to reduce my tax deduction at source. It is amazing how sheer inertia could cost you money (I’ve been meaning to file T1213 every year but somehow never get around to it).