How to Compensate Permanent Recruiters?

Hello everyone! I hope you can help me out with a question that feels a bit dense—I’m seeking guidance from the seasoned pros in this community!

I launched a recruitment agency at the beginning of this year, and we’re doing well, generating around $60K per month, primarily through contract work. While I have considerable experience in temporary and contract recruitment, permanent placements are a whole new ballgame for me. As I grow my team, I’m trying to figure out how to handle billing and commission calculations for individual recruiters.

I plan to implement a salary plus commission structure. The idea is for recruiters to repay their salary with their billings while earning commissions on any amount they generate beyond that. I’m considering a commission model where they receive 30% for securing the job order and 25% for successfully filling the order.

Here’s an example:

If a recruiter’s monthly salary is $5K and they generate $30K in billings for the month, how should I calculate their commission? I apologize if this question seems basic, but I’m really struggling to understand this. Should their billings be based on the total fee of the job order they worked on, or just the portion they directly impacted?

According to my proposed plan, if a recruiter secures a job order but someone else fills it, they’ll still be eligible for a 30% commission after covering their salary. In that case, if the fee for a placement is $20K, would their commission be calculated on $15K (the original fee minus their salary)? Or would it be calculated on the entire $20K? I’m genuinely puzzled here—any insights would be greatly appreciated! Thanks so much!