Where does the money actually come from when you get a mortgage?
The money your bank lends you didn't come from someone else's savings account. In most cases, it didn't exist until the moment your mortgage was approved. Here's the real story — and why it matters for the rate you pay.
The Bond Market
Your rate is set by the bond market, not your bank
The base rate for your fixed mortgage comes from Government of Canada bond yields — not from an internal formula at your bank.
Most people assume their bank picks a mortgage rate based on their credit score and some internal formula. Your credit score matters — but it determines which tier of rates you qualify for, not the base rate itself.
The base rate comes from the bond market. Specifically, it comes from Government of Canada bond yields — and the bond term matches your mortgage term. If you're taking a 5-year fixed mortgage, the benchmark is the 5-year GoC bond yield. A 3-year fixed? The 3-year GoC bond yield. The principle is the same regardless of term.
The lender's spread covers their operating costs, risk of borrower default, and profit margin. For a major bank on a standard insured mortgage, this spread typically runs 1.5% to 2.0%. For alternative lenders, it's wider — more on why shortly.
This is why mortgage rates shift from week to week. One Tuesday a lender posts 4.79%; the next Tuesday it's 4.89%. Nothing changed about borrower qualifications. The bond market moved, and rate sheets followed — sometimes within a day.
When you do lock in a rate — through a rate hold or mortgage commitment — you're protected from increases. If bond yields spike between your commitment and closing day, your rate stays put. If yields drop, most lenders will honour the lower rate. The rate hold is your shield. But the next borrower walking in the door gets whatever today's bond yield dictates.
This is also why mortgage brokers keep a close eye on Bank of Canada announcements — not because the Bank of Canada sets fixed rates directly, but because bond traders react to the Bank's commentary in real time. The Bank signals a hawkish stance on inflation, bond traders reprice expectations, yields move, and rate sheets follow. The Bank of Canada is the spark; the bond market is the transmission mechanism.
The formula behind your fixed rate
A moderate bond yield in this range is typical of a stable economy. Fixed rates in the mid-4s to low-5s are normal here.
Default yields are approximate as of March 2026 and are illustrative only. Actual rates depend on lender, qualification, and market conditions.
Different bond yields reflect different market expectations. Right now, shorter-term GoC yields can be higher or lower than the 5-year depending on the shape of the yield curve. When the yield curve is inverted — shorter bonds yielding more than longer ones — 3-year fixed rates can actually be higher than 5-year rates, which surprises borrowers who assume a shorter commitment means a lower rate. Your broker watches the yield curve, not just a single number.
Money Creation
The money didn't exist five minutes ago
When your mortgage funds, the bank doesn't move money from somewhere else — it creates brand new money from scratch.
Here's where it gets strange — and where most explanations of mortgages quietly get it wrong.
You probably picture something like this: the bank goes to a vault, pulls out $500,000 that belongs to other depositors, and lends it to you. You pay it back with interest, the depositors get their money back, and the bank keeps the difference.
That's not what happens — at least not when the lender is a deposit-taking institution like one of Canada's major banks.
When your mortgage funds on closing day, the bank creates the money from scratch. It makes two entries on its balance sheet at the exact same moment: a new asset ("This borrower owes us $500,000" — your mortgage) and a new liability ("We've placed $500,000 in the lawyer's trust account" — a brand new deposit).
These two entries create each other. The deposit in the lawyer's account didn't come from anywhere — it was created by the act of recording the loan. The $500,000 your seller receives is brand new money that didn't exist five minutes earlier.
If this sounds impossible, you're in good company. But it isn't controversial among economists. The Bank of England published a paper in 2014 explicitly stating that the majority of money in the modern economy is created exactly this way — by commercial banks making loans. The Bank of Canada has said the same. Loans create deposits, not the other way around.
And the money doesn't last forever. It's gradually destroyed as you make your monthly payments over the next 25 years. Each payment shrinks both sides of the ledger — your debt goes down, and money leaves circulation. The creation and destruction are two halves of the same cycle.
Bank's balance sheet
Assets
Liabilities
Watch both entries appear at the exact same moment.
Some of Canada's biggest mortgage lenders — like First National and MCAP — aren't deposit-taking banks. They can't create money directly. Instead, they borrow from a major bank on a short-term credit line (called a warehouse line), and the bank creates the money on their behalf. The money creation still happens at the bank level — these lenders are essentially renting a bank's money-creation power.
This distinction matters for what happens next, because these non-bank lenders must sell the mortgage quickly to repay that credit line and free up capacity for the next deal.
After Closing
What happens to your mortgage after closing
Your lender has a timing mismatch — short-term funding, long-term asset. What happens next determines who ultimately holds your mortgage.
The bank now has a problem.
It just created $500,000 that could walk out the door tomorrow. That deposit in the lawyer's trust account? As soon as your seller cashes their cheque, that money moves to another bank. But the mortgage — the asset on the other side of the ledger — won't be fully repaid for 25 years.
Depending on the lender and the type of mortgage, one of two things happens next.
The lender bundles your mortgage with thousands of others into a standardized financial product called a mortgage-backed security. In Canada, this happens through a program run by CMHC (the Canada Mortgage and Housing Corporation). CMHC guarantees that investors will receive their payments on time, even if some borrowers default. This guarantee makes the security almost as safe as a government bond — but with a slightly higher return.
Who buys these? The Canada Pension Plan. Teachers' pension funds. Insurance companies like Manulife and Sun Life. These are institutions that need safe, predictable income streams stretching decades into the future. Your monthly mortgage payment is exactly that.
Once the lender sells the security, it gets its cash back and the cycle starts over.
Alternatively, major banks with large deposit bases sometimes keep the mortgage on their own books, funding it with the deposits and savings accounts they already hold. This is more common with conventional uninsured mortgages, which don't qualify for CMHC's securitization program. The bank earns the interest spread for the life of the mortgage, but ties up its balance sheet in the process.
Either way, there's a good chance your monthly payment ends up in the hands of a pension fund or another depositor. The bank is the intermediary — the engine that creates the mortgage and routes the cash flows.
Bank creates mortgage
New money enters the economy
Mismatch problem
Short-term funding, long-term asset
Mortgages bundled into securities
Your mortgage joins thousands of others
CMHC guarantees the payments
Backed by a Crown corporation
Pension funds buy the bonds
CPP, teachers' pensions, insurers
Lender gets cash back
Ready to fund the next mortgage
Lenders like First National and MCAP don't hold deposits, so holding the mortgage on their own balance sheet isn't available to them. They fund every mortgage through short-term credit lines from major banks, then must securitize quickly — typically within 30 to 90 days — to repay the line and free up capacity.
This is why these lenders securitize 100% of their insured mortgages. It also explains why they can sometimes offer rates that compete with or beat the major banks: their entire business model is optimized for the securitization pipeline, with lower overhead than a full-service bank branch network.
Lender Economics
This is why different lenders charge different rates
The rate you're quoted isn't arbitrary — it's the cost of the pipeline your mortgage flows through.
If you've ever been quoted a rate by an alternative lender that was noticeably higher than what a major bank offered, you might have assumed you were being penalized for your credit history or income situation. That's part of it — but there's a structural reason that has nothing to do with you.
Different lenders access money through different channels, and those channels have very different costs.
A major bank with an insured mortgage has the cheapest funding path: it securitizes through CMHC's program, pension funds buy the bonds, and the whole machine runs efficiently. The bank's cost of funds might sit only 0.4% to 0.6% above the government bond yield.
A major bank with an uninsured mortgage — which is most conventional mortgages from borrowers with 20% or more down — can't use that CMHC pipeline. It funds those mortgages through more expensive channels: its own deposits, or by issuing its own bonds without a government guarantee. Cost of funds: roughly 0.8% to 1.5% above government bonds.
An alternative lender doesn't have a massive deposit base or a government-backed securitization channel. It borrows from larger banks on short-term credit lines and taps private capital markets. Cost of funds: 1.5% to 3.0% or more above government bonds.
A private lender — a mortgage investment corporation or private syndicate — funds directly from investor capital. Those investors expect returns of 8% to 12%. The cost of money is the highest in the market.
Each of these lenders adds their own operating margin on top. But the starting point — the raw cost of the money itself — is fundamentally different. The rate you're quoted isn't arbitrary. It's the cost of the pipeline your mortgage flows through.
This is one of the reasons working with a mortgage broker matters. We see across the full landscape of lenders and can match your situation to the lender whose funding model gives you the best rate — not just the posted rate from one institution.
Your mortgage rate = lender's cost of funds + their operating margin. The cost of funds is the piece that varies most between lenders. Based on illustrative GoC 5-year yield of 3.2%.
Because alternative lenders rely on private capital markets for funding, their rates are more volatile than bank rates. When credit markets tighten — as they did in early 2020 — the buyers of privately securitized mortgage bonds pull back, wholesale funding costs spike, and alternative lender rates jump even if bank rates stay flat.
The reverse is also true: in calm, competitive markets, private investors chase yield and alternative lending spreads can compress significantly. If your rate quote from an alternative lender seems high, it may partly reflect where credit markets are at that moment, not a permanent premium.
Key Takeaways
What this means for you
Now that you can see the machinery, here are three things worth keeping in mind:
Watch the bond market for fixed rate direction.
The Bank of Canada's overnight rate drives variable rates directly — when it cuts, variable rates follow within days. But fixed rates are driven by bond yields, and the bond market moves on expectations of where the Bank of Canada is headed, not where it is today. Fixed rates often drop before the Bank of Canada cuts, and can sometimes rise even while the Bank is cutting — if inflation expectations shift.
If your rate seems high, ask why.
It might be the lender's funding cost, not your risk profile. A borrower with solid income and a 700 credit score might still get quoted a high rate if they're dealing with a lender that has expensive funding. A mortgage broker can often find a lender with a more efficient funding pipeline for your specific situation.
Rate holds are your friend — understand what they cost.
When a lender locks your rate for 90 or 120 days, they're betting that bond yields won't spike before you close. That bet has a cost, and it's baked into the spread. Longer holds mean wider spreads. If your closing date is soon and certain, a shorter hold can sometimes get you a better rate.
Have Questions About Your Rate?
Want to understand what's driving the numbers on your mortgage? We're happy to walk you through it.