Mortgage Rates: Understanding Variable vs. Adjustable Mortgages

Choosing between a fixed or floating mortgage rate can feel overwhelming, especially when the economy is shifting and market trends seem unpredictable. Many borrowers like the idea of a floating rate but hesitate because they’re unsure how variable and adjustable products actually work. While expert opinions can help guide the decision, those opinions naturally evolve as the market changes. What doesn’t change are the core mechanics of how floating‑rate mortgages operate.

Below is a clear breakdown of the two types of floating‑rate mortgages in Canada, how they behave, and what borrowers should consider before choosing one.

Floating Rates: Two Different Products

Floating‑rate mortgages come in two forms:

1. Variable Rate Mortgage (VRM)

A VRM is tied to the lender’s prime rate, but your payment amount stays the same even when prime rate moves. What does change is the distribution of each payment:

  • When prime increases, more of your payment goes toward interest, and less toward principal.

  • When prime decreases, more goes toward principal, helping you pay down your mortgage faster.

This shifting balance affects your amortization either shortening it or stretching it out depending on rate movements. If your mortgage allows pre‑payments, you can choose to increase your payment to offset rising interest costs.

2. Adjustable Rate Mortgage (ARM)

An ARM also moves with prime, but your payment amount changes whenever the lender adjusts their prime rate. This means:

  • Your monthly payment can increase or decrease throughout the term.

  • You need to be comfortable with payment fluctuations and ensure your budget can absorb potential increases.

Most lenders offer either a VRM or an ARM, not both so the product available to you depends on the institution you’re working with.

Do Floating Rates Change Often?

There’s a common misconception that prime rate changes constantly. In reality, movements are relatively infrequent. While the Bank of Canada adjusts its overnight rate based on economic indicators such as inflation, currency strength, supply and demand, and alignment with U.S. market trends, prime rate changes have historically been modest.

Over the past decade, there have been roughly a dozen prime rate changes, averaging about one per year. Most adjustments are 0.25%, with occasional 0.50% changes during periods of economic pressure.

Flexibility: Locking In or Exiting Early

One of the biggest advantages of floating‑rate mortgages is flexibility.

Locking In

You can convert a floating rate mortgage into a fixed rate at any time during your term. Each lender has its own guidelines for:

  • What fixed rate you qualify for

  • How the remaining term is structured

But the process is typically quick, simple, and often free of cost.

Breaking the Mortgage

Floating‑rate mortgages also offer a more affordable exit strategy. If you need to break your term early, the penalty is usually three months’ interest, calculated on the outstanding balance.

In contrast, fixed‑rate mortgages often use the Interest Rate Differential (IRD) calculation, which can be significantly more expensive.

So Which Is Better?

There’s no universal answer only what’s best for your financial situation and risk tolerance.

However, here’s a helpful guideline:

If the floating rate is meaningfully lower than today’s fixed rates, and you’re comfortable with potential fluctuations, a floating product may offer:

  • Lower interest costs

  • Faster amortization

  • Greater flexibility

  • A cheaper exit strategy

If stability and predictable payments matter more, fixed rates may be the better fit.

Final Thoughts

Floating‑rate mortgages can be an excellent tool when used strategically. Understanding the difference between VRMs and ARMs and how each responds to prime rate changes empowers you to make a confident, informed decision. As always, market conditions evolve, but the fundamentals of these products remain consistent.

If you’re considering a floating rate and want personalized guidance, our team is here to help you weigh the pros and cons based on your goals, budget, and long‑term plans.

MMG