… Why Loan-to-Value Can Make or Break Your Mortgage Rate
When you’re house hunting, refinancing, or even just thinking about tapping into your home equity, there’s one little number that keeps popping up: Loan-to-Value (LTV). It sounds technical—and it is—but once you get it, you’ll see why lenders, insurers, and even private investors obsess over it. And here’s the kicker: your LTV doesn’t just decide if you qualify, it directly impacts the rate you’ll pay.
In this article, I’ll walk you through:
What Loan-to-Value means (and how to calculate it)
Why 80% LTV is the magic line in the sand
How CMHC changes the premium you pay based on LTV
How lenders—especially alternative lenders like Community Trust—change your rate with higher LTVs
How LTV impacts refinancing through HELOCs and second mortgages
How LTV impacts getting a private mortgage
How LTV plays into construction loans
Real-world examples for clients and realtors to put into practice
What Is Loan-to-Value
At its core, Loan-to-Value is the ratio between how much you’re borrowing and what your home is worth. It’s simple math:
Loan-to-Value = (Mortgage Amount ÷ Property Value) x 100%
For example, if you’re buying a $600,000 home with a $120,000 down payment, your mortgage is $480,000.
480,000 ÷ 600,000 = 0.80 → 80% LTV.
That number tells the lender how much skin you’ve got in the game. Lower LTV? You’ve got more equity, less risk for the lender, and often a sweeter deal. Higher LTV? You’re borrowing closer to the max, which means higher risk—and lenders price for risk.
Why 80% LTV is the Magic Line in the Sand
Here’s the biggie: if your LTV is over 80%, you must have default insurance through CMHC, Sagen, or Canada Guaranty. That insurance doesn’t protect you—it protects the lender. But you’re the one paying the premium.
And the higher the LTV, the higher the premium. For example:
- 95% LTV → 4.00% premium on the loan amount
- 90% LTV → 3.10% premium
- 85% LTV → 2.80% premium
So, on that same $600,000 home, if you only had 5% down ($30,000), you’d need a $570,000 mortgage. At 95% LTV, the premium would be $22,800 tacked right onto your mortgage.
That’s why hitting that 20% down payment is such a game-changer—it saves you thousands in premiums and often opens doors to better rates.
How Lenders Adjust Rates Based on LTV
Even once you’re under 80%, lenders still adjust your rate based on LTV. Big banks are a bit more subtle, but alternative lenders like Community Trust or Home Trust? They’re up front about it.
- A deal at 65% LTV might get you a lender’s best promo rate.
- At 80% LTV, that rate could be 0.25%–0.50% higher.
- If you’re over 80% and insured, sometimes the rate is lower (yes, lower!) because the risk is offloaded to the insurer.
Here’s a quick story:
A client of mine had a condo in Oshawa worth $500,000. With a $250,000 mortgage (50% LTV), Community Trust offered him a stellar rate, well below their usual. His friend, buying with 20% down (80% LTV), was shocked to see his rate was higher—even though he had “more down.” The difference? Lenders love the extra cushion at lower LTVs, and they reward you for it.
How LTV Impacts Refinancing and HELOCs
When you refinance, lenders cap you at 80% LTV—that’s a hard line set by government regulation. If your home is worth $800,000, the most mortgage debt you can carry is $640,000.
So, if you’ve already got a $500,000 mortgage, you can only pull out another $140,000, no matter how much equity you’ve built beyond that.
For HELOCs, it’s even stricter: lenders usually only allow you up to 65% LTV in a revolving line of credit. Want more than that? You’ll need to blend it with a regular mortgage to get up to that 80% cap.
How LTV Shapes Second Mortgages
Second mortgages are usually capped at 80% LTV combined with your first mortgage.
Let’s say your house is worth $1,000,000. You’ve got a $600,000 first mortgage (60% LTV). A second mortgage lender might go up to 80% combined—meaning you could borrow another $200,000.
But if you already had a $750,000 first mortgage (75% LTV), your second mortgage options shrink dramatically—maybe you’d only get $50,000 more before hitting that cap.
Private Mortgages and the LTV Factor
Private lenders are all about risk. They don’t look at your income the same way banks do. They care about equity and exit strategy.
- At 65% LTV or less, private lenders might give you rates starting at 8–9%.
- Push it to 80% LTV, and suddenly you’re paying 10–12%.
- Over 85% LTV, very few private lenders want in, and those who do charge sky-high rates.
Here’s an example:
I had a client in Whitby with bruised credit but a ton of equity. Her home was worth $700,000 with a $350,000 mortgage—50% LTV. A private lender was thrilled to give her a $100,000 second mortgage at 8.5%. If she had been sitting at 80% LTV, that rate would have been over 11%, costing thousands more in annual interest.
What About Construction Loans and LTV?
Now, let’s talk about building from scratch or adding that shiny new custom home to your portfolio. Construction financing is a different beast altogether, and LTV plays a starring role here too.
Most lenders want to see that you’ve got at least 35% equity or down payment in the deal before they’ll touch it. That usually means an 65% maximum LTV based on the completed value of the home (sometimes called the “as completed” or “appraised” value). Some private lenders will go to 75% LTV. I know of an alternative lender that will do 75% of the completed valueor 80% of the budge on a Laneway or Garden suite construction with a maximum loan size of $200,000.
For example:
If the finished home is expected to be worth $1,000,000, most lenders will only fund up to $650,000. You’ll need to bring in $350,000 either through land equity (if you already own the lot) or as a cash down payment.
Some lenders may allow a bit more flexibility if the land is already owned free and clear—your land value becomes part of your equity. But here’s the catch: if you’re tight on equity and sitting above that 80% LTV, it becomes very difficult to qualify for a traditional construction mortgage. In those cases, borrowers often have to turn to alternative lenders or even privates, who will lend on construction—but at higher rates and usually capped at 65–75% LTV instead.
Here’s a quick story to bring it home
One of my clients in Clarington bought a lot for $400,000 cash and wanted to build a $600,000 custom home. The completed value was estimated at $1,000,000. Because the land was owned outright, that $400,000 counted as equity, giving them a 60% LTV. The lender was thrilled, approved the $600,000 build financing, and released funds in stages. Had they only had a small down payment and no land equity, the whole project would have been dead in the water.
NOTE: When it comes to construction financing, you basically have to go to a Prime lender, like a big bank, but they will want strong credit, stable income, a proper budget, builder contracts, permits, and a lot of other paper work. Or, you could to private lenders who are much more flexible but they’ll want to see that you’ve got enough equity or cash in the deal and a viable exit strategy. Plus you are looking at higher rates, lender and broker fees. But for some borrowers, it’s the only way to get shovels in the ground.
Most Alternative lenders won’t touch construction financing because they are collateral lenders, and until you build that house, there is no collateral.
Bottom line: when it comes to construction, you need a lot more skin in the game. Your LTV decides whether the build can get off the ground—or whether you’re stuck sketching floorplans at the kitchen table.
Allen’s Final Thoughts
Loan-to-Value might sound like boring math, but it’s one of the most powerful levers in the mortgage world. It affects your rate, your insurance premiums, your ability to refinance, and even whether private lenders or construction lenders will give you the time of day.
As your mortgage agent, my job is to help you play the LTV game to your advantage—whether that’s structuring your down payment, advising you on timing a refinance, or finding the right lender fit for your situation.
At the end of the day, you don’t need to memorize all these numbers—that’s my job. What you need is someone who can look at your big picture, explain your options in plain English, and guide you to the most cost-effective path.
So whether you’re buying, refinancing, building, or just curious about your equity, know this: I’m here to crunch the numbers, handle the lenders, and fight for your best rate.
