How to Calculate Sales Commission — Formula, Examples, and What to Do When It Gets Complex
Learn how to calculate sales commission for tiered plans, accelerators, caps, clawbacks, and splits. Worked examples for every scenario a sales leader or rep.
By Compswell —
In this article: The basic commission formula and how quota changes it Worked examples for tiered plans, accelerators, caps, and clawbacks Split and ramp period calculations What to do when the numbers do not add up Calculating sales commission should be simple. Multiply the deal value by the commission rate and you have your number. In practice, almost no compensation plan works exactly like that. Real plans have tiers that change the rate at different performance levels. They have accelerators that reward overperformance. They have caps that limit upside. They have clawbacks that recover commission on deals that cancel. And they have split arrangements for deals that involve multiple people. This guide covers every calculation scenario you are likely to encounter — with worked examples for each one — and explains what to do when the numbers do not add up the way you expected. The basic formula The foundation of every commission calculation is: Commission = Deal value × Commission rate A salesperson closes a £40,000 deal. Their commission rate is 10%. They earn £4,000 in commission on that deal. That is the complete calculation for the simplest possible plan. Most plans are more complex than this. Quota based commission calculation Most plans do not simply pay a flat rate on every pound of revenue. They pay based on performance relative to a quota. The quota is the target. The commission rate applies to the revenue the rep generates, but the rate itself may change depending on how much of the quota they have hit. A rep with a £500,000 annual quota closes £420,000 in revenue. Their attainment is 84%. Attainment = Revenue closed ÷ Quota × 100 £420,000 ÷ £500,000 × 100 = 84% attainment At 84% attainment, what do they earn? That depends on whether the plan has a threshold, a standard rate, or a tiered structure. Threshold plans Many plans include a performance threshold — a minimum attainment level below which no commission is earned. Common thresholds are 50%, 60%, or 70% of quota. If a plan has a 70% threshold and a 10% commission rate: A rep at 65% attainment earns zero commission — they are below the threshold. A rep at 84% attainment earns commission at 10% on all their revenue — they are above the threshold. Important: most threshold plans are not retroactive. Passing the threshold does not unlock commission on the revenue earned below it. It only unlocks commission from that point forward, unless the plan explicitly states otherwise. Tiered commission calculation Tiered plans pay different rates at different performance levels. A typical structure: | Attainment | Commission rate | | | | | 0% to 70% | 0% — below threshold | | 70% to 100% | 8% | | 100% to 120% | 12% | | Above 120% | 16% | A rep closes £560,000 against a £500,000 quota — 112% attainment. Calculate each tier separately. Note that in this example the 0% rate on Tier 1 reflects the threshold design — the rep earns nothing on the first £350,000 of revenue. If your plan pays a reduced base rate below threshold rather than zero, substitute that rate in Tier 1 and recalculate accordingly: Tier 1 — 0% to 70% of quota: £350,000 × 0% = £0 Tier 2 — 70% to 100% of quota: £150,000 × 8% = £12,000 Tier 3 — 100% to 112% of quota: £60,000 × 12% = £7,200 Total commission: £0 + £12,000 + £7,200 = £19,200 The tiered calculation always uses the quota amounts as the tier boundaries, not the attainment percentages applied to total revenue. Accelerator calculation An accelerator is a higher commission rate that applies above a certain performance level. Accelerators are the most motivating element of a well designed commission plan — they make overperformance disproportionately rewarding. A simple accelerator plan pays 10% up to quota and 18% above quota. A rep closes £580,000 against a £500,000 quota. Commission on the first £500,000: £500,000 × 10% = £50,000 Commission on the additional £80,000: £80,000 × 18% = £14,400 Total commission: £50,000 + £14,400 = £64,400 Without the accelerator at a flat 10% they would have earned £58,000. The accelerator adds £6,400 for the same additional £80,000 of revenue. This is the design intent. The additional reward per pound of revenue above quota should be significantly higher than below quota to motivate the extra effort required to exceed target. Earnings cap calculation Some plans cap total commission at a defined amount — for example 200% or 250% of the on target variable pay. Above this cap, additional revenue generates no further commission. A rep has a £40,000 variable target at 100% quota. The cap is 250% of variable, meaning maximum commission is £100,000. If the rep's calculation produces £115,000 in commission before the cap, they receive £100,000. Caps are among the most contentious elements of any commission plan. They are usually implemented to manage Finance's cost model but they directly demotivate the highest performers — who are typically the reps most capable of leaving for an uncapped plan at a competitor. Use caps only when there is a genuine structural reason — for example in a market where one exceptional deal could generate commission that is economically indefensible. Clawback calculation A clawback provision allows the company to recover commission on deals that cancel or churn within a defined period — typically 30 to 180 days after payment. A rep earned £8,000 commission on a £80,000 deal — assuming a 10% commission rate. The deal cancels after 45 days. The plan has a 90 day clawback provision. The full £8,000 is clawed back from future commission payments. If the rep earns £15,000 in commission the following month, they receive £7,000 after the clawback. Some plans use partial clawbacks that scale by how far through the clawback period the cancellation occurs. A deal cancelled at day 30 of a 90 day window might trigger a 67% clawback rather than 100%. Clawback calculations must be documented precisely in the commission agreement. Ambiguity in the clawback mechanics is one of the most common sources of commission disputes — and one of the most common liabilities under EU Pay Transparency requirements, where inconsistent application of clawback rules across comparable roles creates justification gaps. Split commission calculation When multiple people contribute to a deal, commission is split between them. The split mechanics need to be defined in the plan before the deal closes — not after. A rep and a sales engineer both contributed to a £120,000 deal. The plan allocates 70% of quota credit to the rep and 30% to the sales engineer. Rep quota credit: £120,000 × 70% = £84,000 Sales engineer quota credit: £120,000 × 30% = £36,000 Each person then calculates their commission from their credited amount at their individual commission rate. Their attainment calculations also use only their credited revenue relative to their individual quota. Overlay roles — solutions engineers, product specialists, business development representatives — typically receive a percentage of the deal value as a flat bonus rather than full quota credit, because they contribute to multiple deals simultaneously and cannot hold a single threaded quota. Ramp period calculation New hires typically operate on a ramp schedule for their first three to six months. During ramp, their effective quota is lower to account for onboarding time. A rep's full quota is £500,000 annually. The ramp schedule is: | Month | Ramp percentage | Effective quota | | | | | | Month 1 | 25% | £125,000 | | Month 2 | 50% | £250,000 | | Month 3 | 75% | £375,000 | | Month 4 onwards | 100% | £500,000 | Commission is calculated against the ramped quota, not the full quota. A rep who closes £100,000 in month 1 is at 80% attainment against their ramped quota — not 20% against their full annual quota. Ramp calculations matter enormously for OTE accuracy. A rep who earns below OTE in their first year may be experiencing normal ramp effects rather than underperformance. Leaders who do not clearly separate ra
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