When you borrow more than 80% of the property's value, the lender may charge extra because the loan is considered higher risk.
This extra cost can be charged in different ways, depending on the lender.
A low equity margin is usually an additional interest rate margin added to your normal home loan rate while your loan remains above the lender's equity threshold.
A low equity premium may be charged differently depending on the lender. In some cases, it may be a one-off fee. In other cases, it may work more like an interest rate premium.
Some lenders may also limit access to their best advertised rates until you have more equity in the property.
The exact cost, structure, and removal rules vary by lender. This is where a mortgage broker can help by comparing the options, explaining the real cost, and helping you understand which lender may be the best fit for your situation.