You can verify futures margin requirements on the Margin Trading page of the IBKR website.
While there is no specific page dedicated to futures margin requirements for UK SIPP accounts, generally the margin requirement will be 3x (three times) the overnight margin listed on the Margin Trading page.
You can also see how the account's real time margin requirements would change when previewing an opening or closing order with the Check Margin Impact feature:
- In the Mosaic Order Entry panel (or any trading tool), click the Advanced icon and then select Check Margin (or Margin/Performance for option orders)
- From an order line in Classic TWS, use the right-click menu and select Check Margin Impact.
Find more information on how to preview margin requirements in our Users' Guide.