The property buyer (person or business) or whoever receives the asset (even as a gift) pays stamp duty in WA (unless an exemption applies). Keep in mind that stamp duty is an additional cost you need to factor in on top of your property cost, conveyancing and insurance.
The good news is that most lenders will allow you to increase the principal amount of your home loan to account for stamp duty. This will increase your home loan repayments. If you're buying a property with the help of a conveyancer, they may take care of the paperwork and lodge the payment with the revenue office on your behalf.
When is stamp duty in WA payable?
In Western Australia, stamp duty is payable within 30 days of when your duties assessment notice is issued. Late payment penalties apply. Your conveyancers must apply for the duties assessment notice with the local revenue office within two months of settlement.