Margin Estimator

Read below for information about this page or make your selection from the drop down box below. You can only select one underlying security or index at this stage.

This tool will estimate any margins which may be payable on option positions.

If you only buy options, then margins are not payable. It is when you write (sell to open a position) options that margins may be payable.

Please take note:

1. This is an estimate of Australian Clearing House (ACH) margins. Please confirm with your broker the exact margin payable. Your broker may charge you a different amount, which is a matter for discussion between you and your broker.
2. This is only an estimator and will not calculate exactly.
3. Data used by the estimator is updated on a weekly basis.

First you need to select an underlying security or index by highlighting it and pressing the "Go" button. The calculator will store the security you have selected and then ask you to select one or more option series.

You can only select one underlying security/index at this point. If you return to this page at another time you can select another security.

This calculator uses calculation software provided by

Comprehensive help is available for this estimator, it will open a new browser window.