Sales Commission Calculator

Sales, rate, quota and base pay in — commission, total pay and what it costs the business out

Updated 2026-09-28

Sales in the period

Commission rate up to quota

Quota (0 = flat rate on everything)

Rate on sales above quota

Base pay for the period

Gross margin on what they sell

Commission earned: $2,640.00
Total pay (base + commission): $5,640.00
Effective commission rate: 5.5%
Commission as share of gross profit: 15.7%
Employer cost incl. 7.65% FICA: $6,071.46

Tiers here are marginal: the higher rate applies only to sales above quota, so there is no cliff at the quota line. Unemployment tax, workers' comp and benefits are extra.

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A commission plan answers two questions at once: how much the salesperson takes home, and how much of each sale the business gives away. Most calculators answer only the first. This one works out commission with an optional quota and a higher rate above it, adds base pay, and then shows the side owners need — the effective rate, how much of your gross profit it consumes, and the employer payroll tax on top.

How commission is calculated

Flat commission = sales × rate. $48,000 of sales at 5% is $2,400.

With a quota and an accelerator, the rate steps up only on sales above quota. At 5% up to a $40,000 quota and 8% above it, the same $48,000 pays $40,000 × 5% = $2,000 plus $8,000 × 8% = $640, for $2,640 in commission — an effective rate of 5.5%. Add a $3,000 base and total pay for the month is $5,640.

Marginal tiers versus retroactive tiers

In a marginal (stepped) plan, each rate applies only to the sales inside its band, like tax brackets. In a retroactive plan, crossing the quota applies the higher rate to every dollar sold. Retroactive plans create a cliff: at $39,999 of sales the rep earns $1,999.95; at $40,000 they earn $3,200 — about $1,200 more for one extra dollar of sales. That invites deals being held back or pulled forward across period ends. The calculator uses marginal tiers for that reason; if your plan is retroactive, set the quota to zero and enter the higher rate.

5% to a $40,000 quota, 8% above it
Sales	Marginal plan	Retroactive plan
$30,000	$1,500	$1,500
$39,999	$1,999.95	$1,999.95
$40,000	$2,000	$3,200
$48,000	$2,640	$3,840
$60,000	$3,600	$4,800

Commission as a share of gross profit

A 5% commission sounds small until you compare it with margin. If the products sold carry a 35% gross margin, $48,000 of sales produces $16,800 of gross profit, and the $2,640 commission takes 15.7% of it. On a 20% margin product the same commission would take 27.5% of gross profit. That is why many businesses selling a mix of high- and low-margin lines pay commission on gross profit instead of revenue — 15% of $16,800 gross profit pays $2,520 and automatically discourages discounting.

Base pay, draws and what the business really pays

Commission paid to an employee is wages: the employer owes its share of Social Security and Medicare (7.65% combined, up to the Social Security wage base) plus unemployment tax and workers' compensation. On the $5,640 month above, employer FICA alone adds $431.46, for $6,071.46 before unemployment tax and benefits. The employee cost calculator adds the rest.

A draw is an advance against future commission for new or seasonal reps. A recoverable draw is paid back from later commission; a non-recoverable draw is effectively a guaranteed minimum. Put the type of draw in writing — several US states require commission plans to be written and signed.

Setting a plan that works

Pay on collected revenue, or claw back on refunds, so commission is not paid on sales that never become cash
Keep the quota reachable by most of the team; accelerators should reward the top performers, not replace base pay for everyone
Model the plan at a bad month, a typical month and a record month before announcing it
Record commission in the same period the sale is recognised so your monthly margins are honest

Keep the numbers in a spreadsheet

Ready-made Excel and Google Sheets templates that pick up where this calculator stops. One-off purchase, instant download.

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Frequently asked questions

How do I calculate commission on sales?

Multiply sales by the commission rate. With a quota and accelerator, apply the base rate to sales up to quota and the higher rate to sales above it, then add the two.

What is a typical sales commission rate?

It depends on the industry and on how much of the rep's pay is base. Rather than copy a market rate, check what share of your gross profit the commission would take using the calculator.

Is commission taxed differently from salary?

Commission is treated as wages for payroll tax. For federal income tax withholding, employers may treat it as supplemental wages; the employee's actual tax is settled on their annual return.

What is the difference between a marginal and a retroactive commission tier?

Marginal tiers apply the higher rate only to sales above the threshold. Retroactive tiers apply it to all sales once the threshold is crossed, which creates a pay cliff at the quota.

Should commission be paid on revenue or gross profit?

Revenue is simpler to explain; gross profit protects your margin when reps can discount or sell a mix of high- and low-margin products.

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