Expenses charged to client counted as income?

Hi, On some of my invoices I charge travel expenses and per diems to my clients as well as the job rate. The client reimburses the total invoice value including these expenses. Do I count the total invoice value as income when it comes to self assessment or do I take the extra expenses off and just declare the job rate? Thanks in advance

Hi,
You will declare the full amount on the invoice as income and then claim any relevant expenses on the return.
Thank you.