How Debt Changes What You Can Buy in Edmonton

Key takeaways

• GDS 39% covers housing. TDS 44% covers housing plus everything else.
• A monthly payment hurts your ratios more than a large balance with a small payment.
• Credit cards are counted on a minimum-payment basis even at a zero balance.
• The stress test applies on top, so you qualify at a higher rate than you pay.
• Lenders re-check before closing. New debt after pre-approval can end the deal.

Who this guide is for

Edmonton renters with a car payment, a student loan, or a line of credit, wondering how much difference it actually makes — and whether to pay something off before applying.

The two ratios, plainly

Gross Debt Service is what the home costs you monthly, as a share of gross income: mortgage principal and interest, property taxes, heating, and where applicable half of the condo fee. The usual ceiling for an insured mortgage is 39%.

Total Debt Service is that plus every other monthly obligation: car payments, credit card minimums, lines of credit, student loans, support payments. The usual ceiling is 44%.

Both must pass. In practice, for anyone carrying meaningful debt, TDS is the one that binds — and the gap between the two is only 39% to 44% of gross income for everything that is not the house.

Why a payment matters more than a balance

Lenders underwrite cash flow. A large debt with a small payment can affect you less than a small debt with a large one, because it is the monthly obligation that goes into the ratio.

That is why a car loan is so heavy. It is a large fixed monthly payment, often several hundred dollars, and it consumes the same room in your TDS that mortgage payment would have. A car payment can move what you qualify for by a strikingly large amount of house.

How each kind of debt is counted

• Car loan or lease — the actual monthly payment, in full, until it ends.
• Credit cards — typically a minimum payment calculated from the balance, commonly no less than 3% of the outstanding balance.
• Lines of credit — usually a calculated payment based on the balance or the limit, depending on the lender.
• Student loans — the required monthly payment, including where repayment has not yet started in some cases.
• Support payments — counted, and documented.

The detail that surprises people: an unused card with a high limit can still matter to some lenders, and a card carrying a balance certainly does.

The stress test sits on top

Your ratios are not calculated at the rate you were quoted. Under the qualifying rules used by federally regulated lenders, you must qualify at the greater of your contract rate plus 2% or 5.25%.

So the mortgage payment used in your GDS and TDS is larger than the payment you will actually make. This is why an online calculator using your real rate flatters your borrowing power, and why the number from a broker comes back lower than people expect.

Pay down, or save more?

This is the genuinely useful question, and the answer is often counterintuitive: clearing a high-payment debt can increase your purchase price by more than adding the same money to your down payment.

A dollar added to a down payment buys a dollar of house. A dollar of monthly payment eliminated frees room in your TDS, and room in your TDS translates into a multiple of itself in mortgage principal.

• Target the debts with the highest payment relative to their balance.
• Fully clearing a debt is usually worth more than partially reducing several.
• Do not drain your closing-cost money or your emergency fund to do it.
• Ask your broker to run both scenarios — they can do it in minutes and the answer is specific to you.

Do not guess at this one. The arithmetic depends on your rate, your income and the particular debts, and it is exactly what a mortgage professional is for.

What not to do after pre-approval

A pre-approval is a snapshot. Lenders re-verify employment and finances before funding, and changes between approval and closing can undo the whole thing.

• Do not finance a car, furniture, or an appliance package.
• Do not take a new credit card or increase a limit.
• Do not change jobs if you can avoid it, particularly to self-employment or probation.
• Do not make large unexplained deposits into your account.
• Do not co-sign anything for anyone.

“It was only for the furniture” is a sentence people say after a deal has collapsed a week before possession.

A worked comparison

Take two buyers with identical income and identical savings. One has a car payment; the other paid cash for an older car years ago.

The one without the payment has that room available inside their 44% TDS ceiling, and it goes toward mortgage instead. The difference in what they qualify for is not the size of the car payment — it is the mortgage principal that payment could have serviced over an amortisation, which is a very much larger number.

That is the whole argument for looking at your debts before you look at houses. It is also why two friends earning the same salary can be shopping in visibly different parts of the Edmonton market.

Where credit score fits alongside this

The ratios decide how much. Your credit score influences whether, and at what rate.

They are separate tests and both matter. A strong score with heavy debt still runs into TDS; clean ratios with a damaged score can still mean a higher rate or a narrower set of lenders. For an insured mortgage there is generally a minimum score in the region of 600, though individual lenders set their own bars higher.

The useful part is that the two respond to the same behaviour: paying down revolving balances improves your ratios and, usually, your utilisation and therefore your score.

Debt that is not necessarily bad

None of this means debt disqualifies you. Plenty of Edmonton buyers close with a car payment and a student loan.

What it means is that debt has a price expressed in house, and you should know that price before you decide it is worth paying. A clear picture of your ratios is also the fastest route out of the vague anxiety of not knowing whether you can buy at all.

Sources

• CMHC — calculating GDS and TDS
• Office of the Superintendent of Financial Institutions — minimum qualifying rate
• Financial Consumer Agency of Canada — qualifying for a mortgage

Frequently asked questions