The stress test, and why approvals shrink

Almost everyone who gets a mortgage approval reacts the same way. The number is smaller than they expected, and often smaller than a payment they know they could comfortably make.

The stress test is usually why.

What it actually is

Lenders do not qualify you at the rate you are offered. They qualify you at a higher one, and then check that you could still afford the payment.

The rate they use is called the minimum qualifying rate, and it is the greater of your contract rate plus two percentage points, or 5.25 percent. Whichever of those two is higher is the rate your application is tested against.

So if the rate you are actually paying is low, the 5.25 percent floor applies. If your rate is higher, the contract rate plus two applies instead. Either way, the payment used to assess you is larger than the payment you will really make.

Why it exists

It came out of a concern that people were borrowing comfortably at low rates and would be in trouble when those rates eventually rose. The test builds in a cushion: if rates climb during your term, or at renewal, you should still be able to carry the mortgage.

Whatever you think of it as policy, the practical effect is straightforward. Your borrowing capacity is set by a payment you are not making, on a rate you are not paying.

Where the test actually bites

The qualifying payment feeds into two ratios, and both must pass.

Gross debt service compares your housing costs to your income: the mortgage payment at the qualifying rate, property tax, heating, and half of any condominium fee.

Total debt service adds everything else you owe monthly: car payments, credit card minimums, student loans, support payments, lines of credit.

On insured files the usual limits are thirty nine and forty four percent. Both have to clear. This is why existing debt reduces your mortgage approval by so much more than the debt itself suggests. It is the monthly payment being counted against you, not the balance.

The practical consequence

Two things follow that are worth planning around.

Clearing a small debt can unlock a large amount of mortgage. A car payment does not just cost you the car payment in borrowing capacity. Because it is measured against your income inside a ratio, removing it can free up considerably more mortgage than the loan balance. If you are close to the edge, paying out a car loan before applying is frequently the single most effective move available.

A higher rate squeezes you twice. You pay more, and you also qualify for less, because the qualifying rate moves up with the contract rate.

The change most people have not heard about

This is the part worth knowing if your term is ending.

Since November 2024, uninsured borrowers switching to a new lender at renewal are exempt from the stress test, provided it is a straight switch: the same mortgage amount and the same remaining amortization. Insured mortgages were already exempt at renewal.

Before that change, someone whose circumstances had tightened could be trapped. They could renew with their existing lender without requalifying, but they could not move to a better offer elsewhere without passing the test again. Lenders knew it, and renewal offers were priced accordingly.

That trap is largely gone. If you are renewing and keeping the same balance and amortization, you can shop the market without the stress test standing in the way. Our renewals page covers how a switch works.

Two conditions to keep in mind. Increase the mortgage or extend the amortization and it is no longer a straight switch, so the test applies again. And credit unions are provincially regulated rather than federally, so their rules can differ.

Working with it rather than against it

You cannot avoid the test on a purchase, but a few things genuinely change the outcome.

• Pay down or eliminate monthly obligations. The highest leverage action available, for the reason described above.
• A longer amortization. Thirty years rather than twenty five reduces the qualifying payment and raises the amount you qualify for. It also costs considerably more interest over the life of the mortgage, so it is a trade rather than a win.
• A larger down payment. Obvious, and worth saying: it reduces the amount being tested.
• Document every dollar of income. Overtime, bonus, commission and rental income can all count with the right history behind them. Income you cannot evidence does not exist as far as the test is concerned. Our note on what to have ready before you apply covers what that means in practice.
• Consider a co-borrower, understanding fully what that asks of them. See co-signers and guarantors.
• Look beyond federally regulated lenders. Credit unions are not bound by the federal rule, and alternative lenders assess differently again, at a cost. Our alternative lending page explains the trade-offs honestly.

The thing worth remembering

The stress test measures whether you could carry a payment you are not making. It is not a judgment about you and it is not a statement about what you can afford in real life.

It does mean the honest question to ask is not what a website says you can borrow, but what a lender will actually approve once the test is applied. Those are different numbers, and the gap is where people get disappointed late in the process.

Run your figures through the stress test calculator to see the effect, then send us the details and we will tell you what a lender would genuinely do with your file.