Lenders don’t pick a number out of the air. Your mortgage rate is built from a funding cost — a bond yield or prime — plus a margin for term, credit risk, loan-to-value, and whether the mortgage is insured. Understand the machine and you stop overpaying.
Bond yields drive fixedPrime drives variableRisk-based pricingInsured vs uninsuredLTV & down payment100+ lender view
Two borrowers walk into two banks the same afternoon and walk out with two different rates on the same house. Neither is being cheated — they’re being priced. A Canadian mortgage rate is assembled from a handful of moving parts: the lender’s cost of money (a government bond yield for fixed rates, the prime rate for variable), plus a margin that reflects your term, your credit, how much you’re putting down, and whether the mortgage carries default insurance. Miss how those pieces fit together and you accept the first number offered. Understand them and you know exactly which levers to pull — and which lender out of a hundred is priced for a file like yours.
What you get
Why Canadians choose Mortgage Squad Advisors.
See the two engines behind every rate: bond yields set fixed pricing, the prime rate sets variable
Understand the lender margin — the spread added on top of funding cost for profit and risk
Learn why insured (high-ratio) mortgages often price lower than uninsured ones
Grasp how loan-to-value and down payment size shift the rate you’re quoted
Know how credit risk is priced in — and why a stronger file earns a sharper number
See why term length (from 1 to 5+ years) changes the rate independent of everything else
Understand why posted rates and the rate you actually get are rarely the same
Learn how amortization and property type feed into risk-based pricing
Compare across 100+ lenders so you see the full price curve, not one bank’s slice of it
Use the knowledge with our rate-beat guarantee to make lenders compete for your file
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Every rate begins with what it costs the lender to source the money. For a fixed rate that anchor is the Government of Canada bond yield for a matching term; for a variable rate it’s the prime rate, which tracks the Bank of Canada’s policy rate. This is the floor no lender prices below.
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Add the risk-and-profit margin
On top of the funding cost the lender adds a spread. That margin widens or narrows with your credit strength, your loan-to-value, the term, the property, and whether the mortgage is insured. A clean, insurable, low-LTV file earns the thinnest margin — and the sharpest rate.
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Shop the whole curve, not one desk
Because each lender sets its own margin and appetite, the same file gets materially different quotes across the market. We run your profile past 100+ lenders, find the one priced for your situation, and hold them to our rate-beat guarantee so you land the number your file actually deserves.
How are mortgage rates calculated? The two-layer model
Every Canadian mortgage rate is really two numbers stacked on top of each other: a funding cost and a margin. The funding cost is what it costs the lender to obtain the money it’s about to lend you. For a fixed-rate mortgage, that anchor is the Government of Canada bond yield for a matching term — lenders raise fixed-term money in the bond market, so a 5-year fixed is priced off the 5-year bond. For a variable-rate mortgage, the anchor is the prime rate, which moves with the Bank of Canada’s overnight policy rate. This funding cost is the floor: no lender prices a mortgage below what the money costs them.
On top of that floor sits the margin — the spread the lender adds for profit and, crucially, for risk. That margin is where your individual file enters the equation. It widens for higher risk and narrows for lower risk, and the size of the spread is what separates a sharp quote from a mediocre one on the very same day. Understanding these two layers is the whole game, because it tells you which parts of your rate are set by the market (and beyond your control) and which parts are set by your file (and very much within it). To see where today’s market sits and get live pricing for your situation, start at our mortgage rates hub, then read how to secure the best rate.
Bond yields and the prime rate: the engines behind fixed and variable
Fixed and variable rates run on different engines, and knowing which is which explains why they move at different times. Fixed rates follow Government of Canada bond yields. When investors demand higher yields — often because inflation or economic growth is running hot — the cost of locking in term money rises, and fixed mortgage rates drift up with it. When yields fall, fixed offers tend to ease. Because bonds trade every day on fresh data and global sentiment, fixed-rate quotes can shift week to week, sometimes faster.
Variable rates follow the prime rate, which lenders set off the Bank of Canada’s policy rate. Your variable is quoted as prime plus or minus an adjustment; the discount is locked at approval, but prime itself floats, so a policy-rate change flows straight into your rate and often your payment. This is the fundamental trade-off in fixed vs variable: fixed buys certainty priced off bonds, variable buys flexibility priced off prime. Our prime rate page tracks the current figure, and the rate forecast lays out where the two engines may head next.
Risk-based pricing: LTV, insurance, credit and term
The margin a lender adds isn’t random — it’s risk-based pricing, and four inputs do most of the work. First, loan-to-value (LTV): the loan divided by the property value. A lower LTV (bigger down payment or more equity) is less risk and usually a sharper rate. Second, and closely tied, is insurance. Put less than 20% down and the mortgage is high-ratio and default-insured by CMHC, Sagen, or Canada Guaranty; that insurance shields the lender, so insured rates can actually undercut uninsured ones. The awkward middle — just over 20% down, uninsured — sometimes prices highest of all.
Third, credit risk: a strong credit profile earns a lender’s best margin, while thin or bruised credit pushes the file toward higher A-pricing or toward B and private lenders. You can move yourself into a better band before applying — see credit score for a mortgage and how to improve your score. Fourth, the term itself: each term draws on a different funding cost, so a 3-year and a 5-year can price quite differently at the same moment. Amortization length, property type, and whether it’s owner-occupied or rental all feed the same margin. The borrower-side of this — the levers you personally control — gets its own deep treatment on our what affects your mortgage rate page.
Posted rates vs the rate you actually get
One of the most expensive misunderstandings in Canadian mortgages is treating a posted rate as the price you must pay. Posted rates are a lender’s public benchmark — the sticker price — and the real, discounted rate available to a qualified borrower is typically well below it. The gap between posted and actual exists precisely because pricing is competitive and file-specific. Two things close that gap in your favour: optimizing your own inputs (credit, down payment, term, insurability) and forcing lenders to compete for your file.
That second part is where working across the whole market matters. Because every lender sets its own margin and its own appetite — some want insurable purchases, some want rentals, some want self-employed files — the same borrower gets materially different quotes depending on who’s asked. A single bank shows you one desk’s slice of the curve; a broker with access to 100+ lenders shows you the whole curve and finds the desk priced for a file like yours. If you’d rather compare rate-shopping directly, our bank vs mortgage broker page lays out the difference, and lowest mortgage rates covers how the sharpest numbers are actually reached.
Turning the mechanics into a lower rate
Knowing how a rate is calculated only pays off when you use it to change the number. The strategy is simple to state: optimize every input you control, then shop the input you don’t — the lender margin — across the entire market. On the controllable side, strengthen your credit before you apply, choose your down payment with insurability in mind (sometimes a slightly smaller down payment that keeps you insured beats a slightly larger one that doesn’t), and pick the term whose funding cost is cheapest for the risk you’re comfortable holding. Get pre-approved so you know your band before you house-hunt, and understand the difference between a soft pre-qualification and a real pre-approval.
On the uncontrollable side — bond yields and prime — you can’t change the market, but you can make lenders compete within it. That’s the entire value of running your file past 100+ lenders under one roof: you see the full price curve and land on the thinnest margin available for your profile. Mortgage Squad Advisors operates under FSRA brokerage licence #13737, and our rate-beat guarantee means if you bring us a valid lower quote on a comparable product, we’ll beat it or tell you honestly to take it. You can walk through the full playbook, apply in minutes, or ask Maya to price your exact situation right now — no credit check to start.
FAQ
Common questions, answered.
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How are mortgage rates calculated in Canada?
A mortgage rate is a funding cost plus a margin. The funding cost is what the lender pays to raise money — a Government of Canada bond yield for fixed-rate terms, or the prime rate (which follows the Bank of Canada) for variable-rate terms. On top of that base, the lender adds a spread to cover profit and risk, and that spread flexes with your credit, your down payment, the term, the property, and whether the mortgage is default-insured. The final quote is those two layers combined.
What sets fixed mortgage rates specifically?
Fixed rates track Government of Canada bond yields for a comparable term — a 5-year fixed loosely follows the 5-year bond. When bond yields rise, lenders’ cost of locking in money for that term rises, so fixed rates drift up; when yields fall, fixed rates tend to ease. Bond yields move daily on inflation data, economic growth, and global markets, which is why fixed-rate offers can change week to week. See our fixed vs variable page for how this compares to variable.
What sets variable mortgage rates?
Variable rates are quoted as the prime rate plus or minus an adjustment — for example, prime minus a set discount. Prime moves when the Bank of Canada changes its overnight policy rate, so your variable rate can shift during your term. The discount off prime is locked at approval, but the prime figure itself floats. Our prime rate page explains how the policy rate flows through to your payment.
Why do insured mortgages sometimes have lower rates?
When you put less than 20% down, your mortgage is high-ratio and carries default insurance (CMHC, Sagen, or Canada Guaranty). That insurance protects the lender against loss, so the lender takes on less risk and can price a thinner margin — which is why an insured rate can undercut an uninsured one even though you paid a premium. Uninsured and insurable rates differ because the lender’s risk differs, not because one borrower is ‘better.’
How does my down payment or loan-to-value affect the rate?
Loan-to-value (LTV) is the loan divided by the property value. A lower LTV — a bigger down payment or more equity — means the lender is lending a smaller slice of the home’s worth, which is lower risk and often a sharper rate. Counterintuitively, a very small down payment can produce a lower rate because the mortgage becomes insured; the mid-range (just over 20% down, uninsured) sometimes prices highest. We map where your LTV lands on the curve.
Does my credit score change the rate I’m offered?
Yes. Credit is a core input to the risk margin. A strong score signals reliable repayment, so A-lenders reserve their best pricing for it. Weaker or thin credit pushes a file toward higher-margin A pricing or toward B and private lenders, where rates are higher to offset the added risk. Improving your score before you apply can move you into a lower price band — see our credit-score-for-a-mortgage and improve-credit-score pages.
Why is the posted rate different from the rate I actually get?
Posted rates are a lender’s public benchmark and are usually higher than what’s available in practice. The real, discounted rate depends on your file and on competition among lenders for it. A broker with access to 100+ lenders sees the true market rate for a profile like yours, which is typically well below any single bank’s posted number. Never treat a posted rate as the rate you must pay.
Does the mortgage term length change the rate?
It does, independent of your credit or down payment. Different terms (1, 2, 3, 4, 5 years and beyond) draw on different funding costs, so a 3-year fixed and a 5-year fixed can be priced quite differently at the same moment. The shape of the bond yield curve decides which term is cheapest on any given day. Our 3-year vs 5-year page walks through how to choose.
Can I influence the rate I’m calculated, or is it fixed?
You can influence a surprising amount. You control your credit, your down payment size (and therefore LTV and insurability), your choice of term, and your choice of lender. What you can’t control — bond yields and the prime rate — is the market backdrop. The strategy is to optimize your own inputs, then shop the whole lender market so the margin you pay is the thinnest one available for your file.
