What is a margin utilisation and how is it calculated? Updated February 19, 2019 16:07 Margin utilisation is a percentage of available funds reserved for maintaining margin positions. Margin utilisation = ((Maintenance margin reserved) / (Account Value - Not available as margin collateral)) * 100 Using below example: 10.16 % ≈ ((- 6,000.00) / (83,672.06 - 24,592.88)) * 100 Related articles Trade would exceed margin limits Why are my square positions not netted out and removed from the positions list? What is the account value shield? How to set up instructions to receive dividends as cash or securities? Margin utilization spike around Option Expiry?