Welcome to the forum kc1997.

Usually if you get a significant pay rise your trust deed payment will increase but the term will remain the same. That works on the principle that a trust deed only writes off the debts that you cannot afford to repay during the term.

There are two possible exceptions that we hear of here from time to time:

1: Your circumstances improve so much that (including the amounts you have already paid) you cover the original total of the debt, interest on the debt, and the trust deed fees.

2: Someone else, a third party, offers a lump sum to the trustee in lieu of the expected remaining payments due.