A mortgage pre-approval is a lender's conditional estimate of how much it may lend you, at what rate, and for how long that rate is held — it is not a final approval, and it does not guarantee that funds will be advanced. This guide explains what a pre-approval locks, how long the hold usually lasts, and which parts can still change before closing.
A mortgage pre-approval is a lender's written, conditional estimate of how much it may lend you, at what rate, and for how long that rate is held — it is not a final approval, and it does not guarantee that funds will be advanced at closing. In Canada it works best as a budgeting tool: it tells you the price range you can shop in, subject to verification of everything you told the lender.
The word "approval" causes most of the confusion, because it sounds final. A pre-approval sits near the start of a longer chain that also includes the formal mortgage application, a property appraisal or valuation, a mortgage default insurance review where the down payment is under 20%, and the lender's own funding conditions. Any link in that chain can change the answer. The sections below explain what a pre-approval locks, how long it lasts, and what can still move before you get the keys.
| Question | What a pre-approval usually does |
|---|---|
| Does it lock my interest rate? | Often yes, for a set hold period, on one product and one term. |
| Does it guarantee the loan? | No. It stays conditional on income, down payment, credit, and the property. |
| Does it fix my maximum purchase price? | No. It estimates it from today's numbers and the lender's calculations. |
| Does it survive a job change? | Not automatically. Lenders typically re-verify employment before funding. |
| Does it cover any property? | No. The property has to qualify on location, type, condition, and value. |
What a pre-approval actually is
When you apply for a pre-approval, a lender or mortgage broker collects information about your income, employment, down payment source, existing debts, and credit history. In return you receive a written estimate of a maximum mortgage amount, a rate, a term, and an amortization period, plus the period for which the rate is held. The lender usually pulls your credit report, which matters because that inquiry is recorded. The Financial Consumer Agency of Canada explains what appears on a credit report and how repayment history and inquiries affect a score.
Because the pre-approval is built from documents you supply and a credit bureau snapshot, it is only as strong as those inputs. If your income includes overtime, commissions, bonuses, or self-employment earnings, the lender's calculation may use a conservative average, so the final figure can differ from what you expected. A pre-approval reflects the lender's view of your borrowing capacity on the day it was issued, not on the day you close. The FCAC's overview of mortgages sets out the general framework lenders operate within, including disclosure expectations.
What a pre-approval is not
A pre-approval is not a commitment to lend, and it is not a promise about a specific property. Until the lender reviews the signed purchase agreement, the appraisal or valuation, and your final documents, nothing is binding. It also does not lock the mortgage default insurance decision. Where the down payment is below 20% of the purchase price, the mortgage must be insured, and the insurer — CMHC or a private insurer — reviews the file independently under its own rules.
It also does not obligate you to borrow from that lender. You can walk away and use another lender, but the rate you were quoted does not travel with you. Nor does it stop a lender from declining the file later if your circumstances change. A useful comparison is a co-signer arrangement: both are forms of conditional support, and both depend on the underlying file staying healthy from application to funding.
What the rate hold locks, and what it does not
Many lenders offer a rate hold, sometimes called a rate guarantee, of roughly 90 to 120 days. During that window, if the lender's posted rate for that product rises, you generally keep the pre-approved rate; if rates fall, most lenders will let you take the lower rate. The exact length of the hold, whether it applies to fixed or variable products, and whether it covers only the rate or also fees, vary by lender and province, so read the commitment letter instead of assuming.
There are limits worth knowing. The rate hold usually applies to one property, one mortgage amount, and one product. It typically does not extend automatically if your closing date slips; you may need to request an extension, and the lender can decline or re-price. It also does not protect you from changes in your own qualifications. If your credit score drops or your debt load rises because you financed a vehicle between pre-approval and closing, the lender can revise the rate or the amount. Bank of Canada policy rates influence the market broadly, but the rate you are offered is the lender's own decision.
How long a pre-approval lasts
Rate holds commonly run about 90 to 120 days, although some lenders offer shorter or longer periods. That range exists because a pre-approval is designed to cover a normal house-hunting window, not a year of searching. The practical consequences are straightforward:
- If you have not found a property before the hold expires, ask about an extension before the deadline, not after it.
- If you buy after expiry, you are re-qualified at current rates and current lending rules.
- Even inside the window, the lender re-verifies employment, income, and down payment before funding.
- A short hold can push you into a rushed purchase; a long hold does not reduce your obligations.
Provincial land transfer taxes, legal fees, title insurance, and adjustments sit outside the pre-approval and outside the mortgage amount. The FCAC's section on loans covers the general cost-of-borrowing picture. Budget for closing costs separately, and test how different mortgage amounts change the monthly payment with our loan payment calculator rather than treating the maximum pre-approved amount as a spending target.
What can change between pre-approval and closing
Several things routinely move the final answer. Employment changes — a new job, a shift to contract or probationary work, a layoff — are the most common. New debt is the second: a car loan, financed furniture, or a new credit card changes your debt-service ratios and can shrink the approved amount. A large unexplained deposit can stall a file, because lenders must document the source of your down payment to meet anti-money-laundering requirements.
The property matters too. A lender will want an appraisal or an automated valuation. Unusual properties — a former grow-op, a leasehold unit, a home in a remote location, or an atypical construction type — may be declined by the insurer or the lender. Condo fees, property taxes, and heating costs are folded into qualification calculations, so two homes at the same purchase price can qualify differently for the same borrower.
Co-signers, guarantors, and joint borrowers
If you are relying on someone else's income to qualify, the lender assesses them as well, and their debts count against the file. A co-signer is typically on title and on the mortgage; a guarantor is not on title but promises to pay if you do not. In both cases the obligation appears on their credit file and affects their future borrowing capacity. The Financial Consumer Agency of Canada notes that lenders must disclose certain information to joint borrowers — see the FCAC guidance on joint borrower disclosure. A pre-approval built on a co-signer's strength can collapse if that person's own finances change before closing.
Common mistakes
- Treating the pre-approved maximum as a spending target instead of a ceiling that leaves no room for property taxes, maintenance, or a higher payment at renewal.
- Applying for new credit, financing a vehicle, or changing jobs between pre-approval and closing without telling the lender.
- Assuming the rate hold is automatic and indefinite; ask for the exact expiry date in writing.
- Confusing a pre-approval with a pre-qualification, which is often an unverified estimate based on numbers typed into a website.
- Forgetting that a down payment below 20% means mortgage default insurance and an extra layer of review.
- Ignoring closing costs — land transfer tax, legal fees, title insurance, and adjustments — which are not part of the mortgage amount.
- Letting a co-signer believe the mortgage will not affect their own borrowing capacity.
Read plainly, a pre-approval sets a ceiling, shows you a rate, and gives you a hold period. It does not guarantee a mortgage, a property, or a price, and it can be revised right up until funding. Treat it as a live estimate to be re-checked before you remove conditions.