Figuring out what a sale is actually worth to you shouldn't take a spreadsheet. This sales commission calculator turns a sale price and a rate into a real payout in seconds — flat rate, tiered, or a draw against future earnings. Enter any two values and the third fills in instantly, whether you're a salesperson sanity-checking a deal or a sales manager building next quarter's comp plan.
How to Calculate Commission
The math behind every commission structure starts with the same building block: take the sale price, multiply it by the commission percentage, and divide by 100. As a formula:
$$ \text{Commission Amount} = \text{Sale Price} \times \frac{\text{Commission Percentage}}{100} $$
Say a rep closes a $70 sale at a 14% rate. The commission amount is $70 \times 14 / 100 = \$9.80$. That's the entire calculation for a flat-rate deal — the same formula this online commission calculator runs every time you change a field.
Who Pays the Commission: Percentage Decrease vs Percentage Increase
Once you know that number, the next question is who absorbs it. Most of the time the seller covers it, which means you apply a percentage decrease to find real revenue: $\text{Real Revenue} = \text{Sale Price} \times (1 - \text{Rate}/100)$. In our example, that's $70 - \$9.80 = \$60.20$. Less commonly, the buyer covers the salesperson's cut, and you apply a percentage increase instead: $\text{Price With Commission} = \text{Base Price} + \text{Base Price} \times \text{Rate} / 100$, giving $70 + \$9.80 = \$79.80$.