The Government rebate is credited to your own account, so it won't necessarily sit there forever. If you do a similar thing as I do, & have direct deposits to your AGL account each fortnight, you can go online & cancel those deposits for a period of time. Check how much last year's bill was for the same period, & adjust for price increases. Then you need to determine what date to recommence the regular direct debits again. This can be done at the same time as you cancel the direct debits.