It’s based on the value of the property, how much deposit you have and the total loan amount. There may be other factors that influence the cost, but a Home Finance Manager can let you know if any apply.
It’s a one-off payment and depending on your situation, you could pay it at settlement or add to your home loan. If you’re adding it to your home loan, just be aware you’ll be paying interest on it.
It isn’t refundable after the first year. If you decide to repay your home loan, refinance or switch to another lender within the first year, then you may be eligible for a partial refund.