**Minimum repayment-income threshold: $67,000.**

Working for the first marginal band:

\[
\text{Compulsory repayment}=15\%\times(\text{repayment income}-\$67,000)
\]

Therefore, no compulsory repayment arises at or below $67,000; marginal repayments start above $67,000.

**Controlling authority:** HELP is administered by the Australian Government Department of Education under the *Higher Education Support Act 2003* (Cth). Compulsory repayments are administered by the Commissioner of Taxation through the Australian Taxation Office (ATO).