Interactive Brokers Australia currently offers margin lending to all clients EXCEPT Self-
managed Superannuation Fund account holders ("SMSF"). Click here for more information. For clients of Interactive Brokers Australia who are classified as retail, margin loans will be capped at AUD $50,000 (subject to change in IBKR Australia’s sole discretion). Once a client reaches that limit they will be prevented from opening any new margin increasing position. However, how much a client can borrow depends on
a number of factors, including: the value of the money or assets contributed by the client as security; which financial products the client chooses to invest
in, as we lend different amounts for different products under our risk-based model; and the maintenance margin requirement for the client’s portfolio. Once a client reaches their borrowing limit they will be prevented from opening any new margin increasing position. Closing or margin-reducing trades will be allowed. Refer to this link for information regarding margin accounts offered by IBKR Australia.
IBKR house margin requirements may be greater than rule-based margin.