Adding a subcharge can be done when a new charge is being created.

After the charge amount and VAT % section, you will see a subcharge section, with an add button.

• Click add to start adding a subcharge
• Select a payee from the dropdown. The list of payees is your suppliers list
• Enter a reason for the subcharge
• Enter a reference for the subcharge. This is the payment reference for the subcharge
• Enter the net amount (exclusive of VAT) for the subcharge
• Adjust the VAT %, if applicable
• Finally, just click add charge

None of the subcharge details are visible by the landlord. The landlord will be charged by whoever is the payee of the main charge.