Why Your Bank's Pre-Approval Is Lying To You

You walked into your bank, sat down with a mortgage specialist, answered some questions, and walked out with a piece of paper that says you're "pre-approved for $620,000." It feels official. It feels like a green light. You start scrolling Realtor.ca with confidence.

I have to be honest with you: that piece of paper is closer to a coupon than a commitment.

What a bank pre-approval actually is

Most bank pre-approvals are rate holds, not credit decisions. The bank promises to honour today's rate for 90 to 120 days if you come back to them. They estimate what you might qualify for based on the numbers you typed into the screen. In many cases, nobody has actually pulled your credit, verified your income with documents, or run the file past an underwriter.

That's why the number on the paper can change dramatically once a real offer is on the table. I've seen "pre-approved" buyers get told three weeks before closing that their actual approval is $80,000 lower than the paper said. Sometimes the deal still closes. Sometimes it doesn't.

What it doesn't include

The bank's pre-approval almost never accounts for:

The property itself. Lenders care a lot about what they're lending against. A leasehold condo, a former grow-op, a cabin on a lake, anything rural, anything with a private well or septic, anything under 500 square feet, can all change your approval after the fact.

Your real income story. If you're self-employed, commission-based, on a probation period, on contract, recently changed jobs, or have any non-T4 income, the screen-based pre-approval rarely models you correctly.

Your actual credit picture. Some banks do a soft pull, some do nothing. A real application looks at your full bureau, your utilization, any late payments, and the trade lines that affect your TDS ratio.

What a real pre-approval looks like

A proper pre-approval, the kind a broker should be doing for you, includes pulling your credit, gathering and reviewing your documents (T4s, NOAs, paystubs, bank statements showing the down payment), running you through multiple lenders to find your best fit, and getting a real underwriter to look at the file. When that's done, the number you walk away with is something you can actually plan around.

It also gives you something the bank pre-approval almost never does: a clear answer on why the number is what it is, and what would move it. If your max is $580K and you wanted $640K, a good broker can tell you "pay off $200/month of debt and you're at $620K, save another $15K and you're at $635K." That's the conversation you actually need.

So what should you do?

Use the bank pre-approval as a starting point. Don't use it as a shopping budget. Before you write an offer on anything, get a real pre-approval from someone who actually pulls the file apart. It's free, it doesn't bind you to anything, and the worst-case scenario is you find out your real number a few weeks earlier instead of the day before closing.

The whole point of doing this work upfront is so that the most exciting moment of your adult life isn't also the most stressful. Walk in knowing the number. Walk in knowing why. That's the difference between hoping it works out and knowing it will.