
Originally Posted by
Mike!
In Canada, how large a mortgage you can afford (with insurance through CMHC... a prime mortgage) is dependent on your gross monthly income and your other debt obligations. Two ratios are important. Gross Debt Service (GDS), the percentage of your monthly income that goes to the mortgage, property taxes, condo fees (if applicable) and heating cannot exceed 32%. Total Debt Service (TDS), which cannot exceed 40%, is those costs plus the monthly payments on all other debts. If you have credit cards or other revolving credit, they calculate the monthly payment based off of what it would be if the card was maxed out.
Further, for calculating the cost of the mortgage, they use a "qualifying rate" of interest currently at 5.24%, so even if you take today's lower rate of interest on your mortgage, you'll be able to still afford the mortgage if rates go up by renewal time. The longest amortization currently allowed is 25 years, and minimum down payment is 5%.
What all this means is having a $20k car loan isn't the issue. The issue is your monthly payment. For a $300/mo car loan to lower the house you can afford to $360k, you'd have to already be looking at housing costs within the 32% GDS threshold, and then have debt putting you over the 40% TDS threshold. 8% is a lot of wiggle room ($666/mo on a nominal joint gross annual income of $100k), so if $300 would affect it at all, you either have too much 'other' debt, or you don't have a high enough income to qualify for the more than $360k house to begin with even with zero debt.
Put another way, for your GDS calculation, the monthly payment on a $500,000 house in Oakville with 5% down ($475,000 mortgaged) at the qualifying rate is $2,844/mo, plus property taxes and heating. Add that on, say you're at $3,400/mo. You'd need a total gross income of $10,625/mo, or $127,500/yr in order to pass the GDS on that. If you're making that kind of money between the two of you, a $300/mo car payment shouldn't be enough on top of other debt payments to cap your TDS.
I've entertained the thought of future-proofing my vehicle choice before. My wife and I are married 3 years, still with no kids, and yet a couple years ago I was looking at 3-row vehicles like the Taurus X, Flex, and CX-9, entertaining thoughts about easier road trips with friends, but also future proofing for eventual kids. I'm glad I didn't. All it took was a couple test drives to realize I wasn't ready for that yet. Get it when you need it, and not before. There's plenty of time left.