Record what each instructor earns from a course on the course itself. Splits live next to the sales they apply to, not in a side agreement that nobody can find when it is time to pay out.
Every instructor attached to a course carries a revenue share percentage. Add a co-instructor by email, set their percentage, and it is stored against that course. The instructor list is ordered by share, so the person carrying the largest stake appears first and the arrangement is legible at a glance.
Because the share is a property of the course, it stays attached to the thing that generates the revenue. When a course sells, you are not reconciling a spreadsheet against an order export and hoping the two agree. Instructors can see the orders on the courses they teach, so both sides are looking at the same record.
Course pricing surfaces the platform fee and resulting gross income for each price you set, so what an instructor share is a share of is visible while you are setting the price rather than discovered afterwards. That matters most on subscription courses, where the number a creator cares about is what actually lands per billing period.
A course can carry as many instructors as it needs, each with their own percentage. That covers the common marketplace case of a creator and the platform, the joint course between two independent creators, and the institutional course where a department retains a share alongside the named lecturers.
This is the mechanism a marketplace runs on. Every course carries the agreed split between your platform and the creator who built it, recorded per course rather than negotiated once and lost in email.
Bring in a guest expert for a joint course without either of you having to trust the other's arithmetic. The split is agreed once, recorded on the course, and both of you can see the orders it applies to.
Percentages stored on the course, not in a side agreement.
Instructors view the orders on the courses they teach.
Platform fee and gross income shown as you set each price.
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