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Why Mortgages Aren’t Free

by | November 25, 2025

… Understanding the Cost of Money for Lenders

Have you ever wondered why mortgage rates aren’t just pulled out of a hat? Or why some lenders offer lower rates while others seem to tack on a premium? Behind every rate sheet is something called the cost of money, and if you’re in real estate or looking to buy a home, understanding this concept can give you a serious leg up. Not just for bragging rights at the next open house, but for helping you (or your clients) make sharper decisions, ask smarter questions, and understand why lenders price things the way they do.

Before we dive in, here’s what we’re going to cover today:

Topics We’ll Cover:

What Does “Cost of Money” Actually Mean?

How Lenders Borrow Money to Lend Money

Why Mortgage Rates Aren’t Just About You

How Realtors Can Use This Knowledge in Conversations

How Clients Can Leverage This When Shopping

A Story: The Agent Who Saved a Deal (and a Friendship)

What Does “Cost of Money” Actually Mean?

Think of it this way: lenders are just middlemen in the money world. They don’t have vaults stacked high with cash like Scrooge McDuck. Instead, they borrow money themselves—from depositors, from bond markets, even from other banks. That money costs them something, and that’s what we mean by the “cost of money.”

If a lender can borrow money at 4% and they lend it to you at 5%, that 1% spread is how they stay in business. They’ve got overhead, staff to pay, technology to maintain, and compliance headaches that keep lawyers very busy. That 1% isn’t all profit, but it’s essential to survival.

How Lenders Borrow Money to Lend Money

Picture the lender as someone who’s renting out a hotel room. They have to pay for the hotel first—whether that’s via bonds, mortgage-backed securities, deposits, or corporate lines of credit. These sources each come with their own costs, tied to things like the Bank of Canada’s overnight rate, inflation expectations, or even geopolitical events.

So when you see rates go up, it’s not just because the bank “feels like it.” It’s because the cost of their money—their inventory—just went up.

For example, in 2022 and 2023 when bond yields jumped, fixed mortgage rates followed suit. Why? Because the lenders’ cost of acquiring that money spiked.

Why Mortgage Rates Aren’t Just About You

A lot of borrowers think their rate is determined by their credit score alone. Not quite. That’s just one slice of the pie. Your rate is also determined by the lender’s appetite for risk, their funding sources, and market competition.

Here’s a bit of industry truth: sometimes lenders price aggressively not because they love you, but because they need to hit funding targets or move product faster than their competitors. Other times, they pull back because their funding lines are tighter than usual.

It’s like when your favourite coffee shop raises prices—it’s probably because the cost of beans and rent went up, not because they suddenly got greedy overnight.

How Realtors Can Use This Knowledge in Conversations

For realtors, knowing this isn’t just cocktail party trivia—it’s a tool for demonstrating expertise. When clients get spooked by rising rates, you can confidently say, “Hey, this isn’t about you or your finances. It’s about where lenders are getting their money right now.”

It helps position you as someone who’s not just selling houses but understands the full picture of homeownership. It’s a great way to build trust and deepen client relationships because you’re helping them interpret headlines and separate facts from fear.

How Clients Can Leverage This When Shopping

If you’re a homebuyer or refinancing, knowing the cost of money lets you shop smarter. For example, you might realize that today’s “special rate” isn’t so special if you understand why a lender is discounting it. Maybe they’re using it as a loss leader to sell you other products, or they’re temporarily aggressive to win more business.

You can ask better questions like:

  • “Is this rate reflective of today’s bond market?”
  • “What’s driving this lender’s strategy right now?”
  • “Is there a reason this rate seems unusually low/high?”

It’s not about being skeptical; it’s about being informed.

A Story: The Agent Who Saved a Deal (and a Friendship)

Let me tell you about a realtor I work with often. Last year, she had a client—let’s call him Tom—who was furious because his rate hold expired and the new rate was half a point higher. He was ready to walk away from his purchase and thought the lender was just trying to squeeze him.

My realtor partner, because she’s sharp and listens when we talk shop, explained the whole “cost of money” situation to him over coffee. She even pulled up a chart showing how bond yields had moved in the past 90 days.

Tom didn’t love the higher rate, but he understood it wasn’t personal. He closed the deal. A year later, Tom’s referring his friends to Sara because she took the time to educate him, not just sell to him.

Allen’s Final Thoughts

At the end of the day, mortgages aren’t just about rates—they’re about understanding how the financial world turns and how you can position yourself or your clients within it. Whether you’re a realtor helping buyers navigate uncertainty or a homebuyer trying to make the smartest choice, knowing the cost of money isn’t just “nice to know”—it’s a strategic advantage.

And that’s where I come in.

As your mortgage agent, I don’t just quote rates. I help you understand the market forces at play, advise you on timing, and ensure you’re not caught off guard by things you don’t control. I can arm you with talking points for your clients, help calm nerves when rates shift, and provide guidance on the best mortgage strategies in any market.

If you want someone in your corner who understands not just mortgages but the entire lending ecosystem, I’m here to help. Let’s make your deals smoother, your clients smarter, and your business stronger—together.

Reach out anytime. I’ve got your back.

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Allen Ehlert

Allen Ehlert

Allen Ehlert is a licensed mortgage agent. He has four university degrees, including two Masters degrees, and specializes in real estate finance, development, and investing. Allen Ehlert has decades of independent consulting experience for companies and governments, including the Ontario Real Estate Association, Deloitte, City of Toronto, Enbridge, and the Ministry of Finance.

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