How sales commission structures work
A plain guide to commission-only, base plus commission and tiered plans, how each is calculated, and how draws and quotas change take-home pay.
The core calculation
At its simplest, commission is a percentage of a sale that a salesperson keeps. Multiply the sale amount by the rate written as a decimal: a 5 percent rate on a 10,000 sale pays 500. Everything else in a compensation plan is a variation on that single multiplication. Understanding the base calculation makes it easy to check a payslip or model what a deal is worth before you close it.
Commission-only versus base plus commission
In a commission-only plan, all pay comes from the percentage of sales, which rewards high performers but carries risk in slow months. A base plus commission plan pays a fixed salary on top of the commission, trading a lower rate for steadier income. This calculator models both: leave the base at zero for commission-only, or enter a salary to see total earnings as base plus commission. A 2,000 base on a 500 commission month totals 2,500.
Tiered and accelerated plans
Many teams use tiered plans where the rate rises once a rep passes a threshold, so early sales might pay 5 percent and sales above quota pay 8 or 10. To model a tiered plan here, split the sales into the portion in each tier, calculate each portion at its own rate, and add the commissions. Accelerators work the same way, applying a higher multiplier to revenue past target to motivate reps to keep selling once quota is met.
Draws, quotas and clawbacks
Some plans advance a draw against future commission, essentially a loan the rep repays out of what they earn, which is why one month's take-home can differ from the raw commission. Quotas set the sales target that unlocks accelerators or bonuses. Clawback clauses can reverse commission if a customer refunds or cancels. This tool gives the gross commission on a sale, a clean starting point before those plan-specific adjustments and before tax are applied.