To determine the number of sales reps needed for the next year in SaaS, you need to calculate the revenue target and attainable quota.Multiply the quota by a yield factor to account for reps who may not meet their quota, and consider the load of sales managers and support staff.Specialized sales processes may require additional roles like SDRs, BDRs, and SEs.Many founders underestimate the headcount needed and should budget properly for scaling sales teams.