Published 2 September 2026
A mortgage pre-approval is not a formal mortgage approval. It tells you the maximum a lender may be willing to lend, and it can hold an interest rate for you — anywhere from 60 to 130 days, depending on the lender. It does not guarantee that a mortgage will be approved. I say that plainly because you deserve a straight answer before you start looking. But here is the part nobody explains, and it should settle your nerves: when a pre-approval has been done thoroughly, the heavy lifting is already finished before you ever write an offer.
A ballpark number and a properly built file are two different things
You can walk into a branch, say what you earn and roughly what you owe, and walk out with a figure. That is a general calculation. Nothing has been checked. Lenders and brokers also use different names for these steps — prequalification, preauthorization, pre-approval — and mean different things by them, which is a good part of why buyers end up confused about what they are holding.
A thorough pre-approval is a different exercise. Your credit is pulled and reviewed. A full set of income documents is collected and read, line by line, before anyone talks about house hunting. It takes longer up front. That is the point. The questions about you get asked and answered while no offer deadline is hanging over anyone.
What I look at, and why I want all of it up front
A lender or broker looks at your assets, your income and your level of debt, and will normally pull a credit report. What I ask you for is identification, proof of employment, proof you can cover the down payment and the closing costs, information on any other assets, and on your debts and financial obligations. Proof of employment is usually a recent pay stub along with your position and length of service. If you work for yourself, it looks different: notices of assessment from the Canada Revenue Agency for the past two years. I walk self-employed borrowers through that separately.
Debts counted include credit cards, car loans, lines of credit, student loans, and child or spousal support. Two guidelines shape the number that comes out. Your total monthly housing costs — mortgage payment, property taxes, heating, and half the condo fees where they apply — are generally kept to no more than 39% of gross household income. Housing plus every other debt is generally kept to no more than 44%. Slightly higher is sometimes still possible; it simply means carrying more debt.
One more piece. Banks and other federally regulated lenders qualify you at the higher of 5.25% or your contract rate plus two percentage points, insured and uninsured alike. You have to show you could carry the payment at that rate, not only the one you are offered. And a weak credit profile can mean a decline, or a request for a co-signer. Far better to learn that sitting across from me than halfway through a purchase.
The home is the other half, and it comes second
The pre-approval is about you. The approval is about you and the property together. Before approving, a lender confirms the home meets certain standards, and those standards vary from lender to lender. The amount approved also depends on the value of the property and the size of your down payment.
That is not a trap; it is just the order things happen in. It also means your situation needs to still be holding when the file goes in — same job, same debts, no new car in the driveway. Keeping an eye on that between pre-approval and closing day is part of what I do for home buyers.
If a lender will not do the deal exactly as applied for, there is usually more than one road forward: a smaller mortgage amount, a higher interest rate, a larger down payment, or a co-signer. Fewer things are dead ends than people assume.
Three questions worth asking whoever sets yours up
- How long is the rate guaranteed for.
- Whether you would automatically get the lower rate if rates fall while you are pre-approved.
- Whether the pre-approval can be extended.
It is also fair to ask a broker which lenders they work with. We do not lend money ourselves; we arrange the transaction by finding a lender, and we do not all work with the same ones, so what is on the table genuinely varies. Some mortgage products are only available through a broker. Most of us do not charge you a fee, and are paid a commission by the lender instead. In Ontario, we are regulated by FSRA.
From Rob
Just because I can qualify for this much, how much should I actually spend? That is the question I wish more first-time buyers would ask. My job is not to get someone approved for the largest mortgage possible; it is to understand what they want life to look like after they buy, and once we have that conversation, the number often changes.
If you are getting ready to look
Come and have the conversation early, before you fall in love with a house in Burlington or Waterdown and find yourself in a hurry. An hour spent building the file properly buys you months of shopping with a clear head.
Sources
- Financial Consumer Agency of Canada, “Getting preapproved for a mortgage,” canada.ca (retrieved 2026-09-02; page last modified 2025-10-15)
- Financial Consumer Agency of Canada, “Preparing to get a mortgage,” canada.ca (retrieved 2026-09-02; page last modified 2025-10-15)
- Office of the Superintendent of Financial Institutions, “Minimum qualifying rate for uninsured mortgages,” osfi-bsif.gc.ca (retrieved 2026-09-02; page last modified 2026-01-29)
Information reviewed as of 2026-09-02.
About the author
Rob Cagnin is a Mortgage Broker with indi Mortgage, working with buyers and homeowners in Burlington, Hamilton, Waterdown and Oakville. Accredited Mortgage Professional (AMP) · Certified Financial Planner (CFP). More at robcagnin.ca · About
Related questions
How long does a pre-approval hold my rate?
Somewhere between 60 and 130 days, depending on the lender. That is a real window, and it is worth knowing exactly where yours ends before you start booking showings. Ask whether it can be extended, and whether you would automatically get the lower rate if rates fall while you are pre-approved. Those two answers change how you plan your search.
Can a lender still decline after pre-approving me?
Yes, a lender can. A pre-approval tells you the maximum a lender may be willing to lend; it is not a promise of a mortgage for that amount. What removes the uncertainty is doing the work early — credit pulled, documents collected and read — so the questions about you are settled long before there is an offer on a kitchen table.
I am self-employed. What do I need to bring?
Your notices of assessment from the Canada Revenue Agency for the past two years, alongside the usual identification, proof that you can cover the down payment and closing costs, and details of your other assets and debts. Self-employed files take a little more assembling. Getting them in front of me early is what makes the rest of it calm.
Why does the home I pick affect my approval?
Because the lender is lending against that specific property. Before approving, a lender confirms the home meets certain standards, and those standards are not identical from one lender to the next. The amount also depends on the property's value and your down payment. It is the second half of the file, and it is normal for it to come after the first.
Rob Cagnin · Mortgage Broker · Licence #M08003068 · indi Mortgage · FSRA licence 12403
Rob Cagnin, Mortgage Broker, Licence #M08003068, indi Mortgage, FSRA licence 12403. This article is general information for Ontario readers, not advice for a specific situation. Lender and insurer requirements vary. Information reviewed as of 2026-09-02.