Mortgage jargon is tricky territory to navigate and the terms "pre-qualification" and "pre-approval" are no exception. Don't make the common mistake of assuming that the two terms are interchangeable. They each have their own place and do not hold the same weight in the process of acquiring a mortgage.

1. Mortgage pre-qualification

Mortgage pre-qualification is essentially a first pass at being approved for a mortgage and comes prior to pre-approval. Consequently, pre-qualification is a straightforward procedure to get a rough estimate of the loan amount that you could be approved for. You can do this free of charge, on the internet or over the phone. Simply provide some basic financial information including your assets, income and debt.
 
Keep in mind, that since this is an unofficial process, it will not give you a complete picture of where you stand.  This is primarily because mortgage pre-qualification does not take into account your credit rating which is a crucial factor in determining your eligibility. However, the major advantage of such a step is that you are able to evaluate where your affordability threshold stands.