Mortgage Approval in Canada: GDS & TDS Explained

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Oct 6, 2025

In Canada, mortgage rate holds are one of the most misunderstood elements of the mortgage process. Many buyers hear the term and assume it means their rate is “locked in” at the very best available interest rate until their closing date. Unfortunately, that’s not how rate holds really work.

Understanding how lenders treat rate holds can save you from disappointment—and help you make smarter mortgage decisions. Let’s break it down.

How Long Do Rate Holds Last?

Most lenders offer rate holds between 30 and 120 days. The most common is 120 days, which gives buyers time to shop for a property without fear of rates rising before they close.

In special cases—such as new construction purchases—some lenders may extend rate holds well beyond 120 days. The catch? These longer-term holds rarely match the sharpest rates on the market. You’ll pay a premium for the extra security.

Why Rate Hold Rates Are Higher

Here’s a detail that surprises many: rate hold rates often come with a built-in premium.

For example, let’s say the best available “live” 5-year fixed mortgage today is 4.09%. If you wanted to hold a rate with that lender, the rate-hold-eligible option might actually be a fair bit higher, let’s say 4.29%. Why would a lender do this?

What many borrowers don’t realize is that offering a rate hold—especially one as long as 120 days—can be surprisingly expensive for lenders. On average, the cost of holding a rate on $100,000 of mortgage principal can range from $400 to $900 over the 120-day period. These costs come from several areas:

Hedging: Lenders often use financial tools to protect themselves from rising rates, and these hedges cost money—especially in volatile markets.
Operational and compliance costs: Rate holds require back-end administration, regulatory oversight, and additional processing—even if the loan doesn’t close.
Opportunity cost: If rates rise, the lender loses the chance to lend at those higher rates, reducing long-term interest revenue.
Fallout risk: This is key. A large percentage of borrowers who request rate holds never actually close their mortgage. When a borrower walks away, the lender still eats the hedging and admin costs without seeing a dollar in return.

This is why some lenders bake a small premium into their rate hold offers—to help absorb the costs of “dead files” (applications that don’t complete).

Variable Rate Holds Work Differently

For variable-rate mortgages, what’s held is not the Prime Rate itself—but the discount off Prime.

Example: If today’s offering is Prime – 1.00%, your hold will lock in that –1.00% discount. If Prime rises or falls before closing, your contract rate will move with it—but the discount remains intact.

Do Rate Holds Adjust Automatically?

Another common misunderstanding: rate holds do not automatically adjust if the market improves.

If rates drop during your hold period, you won’t get the lower rate unless you—or your broker—request an adjustment. Some lenders are very flexible and will allow multiple adjustments; others limit the number of times you can reset your rate. And a few don’t allow adjustments at all.

That’s why working with an experienced mortgage broker matters. Brokers know which lenders allow adjustments, how often, and under what circumstances. Without that knowledge, you could miss out on significant savings.

Why Rate Holds Still Matter

Despite the limitations, rate holds provide valuable peace of mind. In volatile markets, knowing you won’t be caught off guard by a sudden rate hike is worth the trade-off of paying a small premium.

Think of it as insurance against rising rates. If rates go up, you’re protected. If they go down, you’ll need to act quickly with your broker to adjust your hold—or switch lenders entirely to take advantage of the drop.

Final Thoughts

A mortgage rate hold isn’t a perfect shield. It doesn’t guarantee the lowest possible rate, and it doesn’t automatically adjust if the market shifts in your favor. But when used strategically, it can be a powerful tool—especially for buyers navigating competitive markets or longer purchase timelines.

The key is understanding the fine print: