Your revenue is pass sales: the price of the pass times the number you sell. Both numbers are in your hands, along with the list of businesses and the way you get the word out.
Up to three amounts come out of each sale: the share you pay the participating businesses, if you promised one; the commission for businesses that sell the pass at their counter, if you pay one; and the platform and payment processing fees. You agree on the first two directly with your businesses. With Arsom, the platform costs an annual subscription plus a small commission per paid pass sold, quoted per project.
What’s left pays for the illustration, printing, promotion, professional advice and your time. The number of passes sold matters most and is the hardest to predict, so base your estimates on a conservative sales volume before you promise the businesses a share. Discovery pass costs and revenue goes through each cost line and how to work out your break-even.