Is the total amount I paid to a ticket broker for tickets to entertain business clients deductible?

No. There are 2 limitations that come in play. The deductible amount taken as an entertainment expense for tickets is the face value of the tickets. The excess amount paid to a ticket agent or scalper is not deductible. Secondly, all meals and entertainment expenses are limited to 50% of the cost. The deduction will be claimed on the business Schedule C Form or Form 2106. You should maintain a diary of all business expenses listing the person, the event, the date and the business agenda that was discussed.