Taxation Administration Act 1953

Work out the amount of an instalment you are liable to pay for an *instalment quarter as follows if, at the end of that instalment quarter, you are a *quarterly payer who pays on the basis of instalment income:

For the purposes of the formula in subsection (1):

unless paragraph (b) or (c) applies—the most recent instalment rate given to you by the Commissioner under section 45‑15 before the end of that quarter; or

if you have chosen an instalment rate for that quarter under section 45‑205—that rate; or

if you have chosen an instalment rate under section 45‑205 for an earlier *instalment quarter in that income year (and paragraph (b) does not apply)—that rate.

If you believe the Commissioner’s rate is not appropriate for the current income year, you may choose a different instalment rate under Subdivision 45‑F.