Including my clients' fee in my invoice

[newtolivewire]

I offer property services to a local estate agent who passes this cost onto his clients. He intends to add some onto my fee for his own business.

So, he has asked me to produce an invoce for the total fee of what I would charge plus his 'add-on' . He will then pay my invoice but minus the part which is his 'add-on'.

For example, if I want to invoice him £100, I would need to invoice him £120 and be paid £100.

I'm sorry if this is a bit confusing! I am really keen to do this work for this client but I need to make sure its o.k to do this. Can anyone help?

I'm new to using the 'ask a mentor' service and would be really grayeful for your help.