Canadian fixed-rate mortgages compound semi-annually by law; US loans compound monthly. On the default numbers that makes the Canadian payment $3,024 against about $3,040 US-style — a small monthly gap that adds up over a 25-year schedule, and the reason a US calculator quietly overstates a Canadian payment.

Any Canadian down payment under 20% requires mortgage default insurance. The premium is 4.00% of the loan at 5–9.99% down, 3.10% at 10–14.99%, and 2.80% at 15–19.99% — rolled into the mortgage itself, so you pay interest on the premium too. The calculator applies the right tier the moment the down-payment slider crosses each line.

Half the monthly payment every two weeks means 26 half-payments a year — thirteen months of payments squeezed into twelve. On the default mortgage that ends the 25-year schedule in about 21.5 years and keeps roughly $62,900 of interest, without any single payment feeling bigger.

Canadian lenders must qualify you at your contract rate plus 2% (or the benchmark rate if higher). At 5% you are being tested on whether you could carry the payment at 7% — the calculator's note shows your test rate so the bank's number does not arrive as a surprise.