Does Pre-Approval Affect Your Credit Score?

How credit pulls work when you're getting a mortgage

When you apply for mortgage financing, lenders run what's called a hard credit inquiry. It's how they figure out whether lending to you is risky, and it helps them calculate your debt-to-income ratio — basically, how much house you can afford. That inquiry does ding your credit score a bit, but not as much as you might think.

The grace period that protects you

Equifax (and the other bureaus) know you're going to shop around. So they use something called a rate-shopping window: if you rack up multiple mortgage inquiries within a short stretch — usually 14 to 45 days — they treat them as a single inquiry when they score your credit. That means you can compare offers without your score taking a beating every time.

What that means in Canada

The same logic applies here. You get a specific period to rate-shop without your credit score taking extra hits. Just remember that inquiries for different kinds of credit — say, a new credit card or a personal loan — don't get bundled together. Those still count separately and can add up.

Three things to keep in mind

First: do your mortgage shopping in one concentrated window. The tighter the timeframe, the better you use that grace period.

Second: check your credit report regularly. Make sure every inquiry is legit and that your information is accurate.

Third: keep up the basics — pay your bills on time, keep your credit card balances low. Those habits matter more than any single inquiry.

What to do next

If you're thinking about buying your first home, understanding how credit inquiries work gives you one less thing to worry about. Shop with confidence, stay organized, and don't be afraid to compare offers. That's exactly what the system is designed to let you do.

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