How Interest Rates Move Home Prices in the GTA

Interest rates are the single most powerful short-term force on housing prices, and the mechanism is simpler than the commentary suggests: rates set how much a monthly payment buys.

The arithmetic

Most buyers shop by monthly payment, not purchase price. When rates rise, the same payment supports a smaller mortgage. Roughly speaking, each one-percentage-point increase in mortgage rates reduces borrowing capacity by about 10%. That doesn't drop prices 10% overnight, but it removes buyers from the top of every price band and pushes the rest down a tier.

The stress test amplifies it

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Canadian borrowers must qualify at a rate higher than the one they'll pay. So a rate increase hits qualification twice, the contract rate and the qualifying rate both move. This is why Canadian housing reacts faster to rate changes than many other markets.

The lag

• Sales volume reacts within weeks. Buyers pause first.
• New listings react next, as sellers watch and hesitate.
• Prices react last, usually a quarter or two later, because sellers resist marking down before they have to.
• On the way down, the same lag runs in reverse: rate cuts show up in traffic and offer counts long before they show up in average prices.

What it means practically

• Cuts don't automatically mean higher prices, they mean more buyers, which matters only if supply doesn't rise faster.
• Rate announcements create short bursts of buyer activity. Listing into one can help.
• If you're buying and selling in the same market, rate moves largely cancel out. The gap between the two properties matters more than the absolute level.
• Fixed-rate renewals coming due are a supply story worth watching: they influence how many homeowners become sellers.