If your build cost sits right on the border of a tier, the table won't help you realize that you might save money by reducing the contract price slightly to fall into a lower premium bracket. You have to do that mental math yourself.
The QBCC updates these tables to reflect legislative changes and levy adjustments. If you are looking at the official QBCC website, you can trust that the figures are current for the financial year. qbcc home warranty insurance premium table