Commission Calculator

Two calculators sit above. The first handles a straight percentage on a single sale. The second handles the structures that actually appear in pay plans, with a base amount and rates that change as sales grow. Every commission field takes either a percentage or a flat dollar amount, and switching between the two converts the figure rather than just relabelling the box, so 3% of a $200,000 sale becomes $6,000 and back again.

What a commission is

A commission is pay tied to what someone sells. It exists to link effort to earnings: the more a salesperson sells, the more they take home, which is a stronger motivator than a flat salary for work whose output is easy to measure.

In its simplest form it is a percentage of revenue. A salesperson on 3% who sells a $100 product earns $3. That is not the only model. Commission can be paid on profit rather than revenue, paid as a bonus at a threshold, or paid alongside an hourly wage or a salary. Some people are paid entirely on commission; most are paid a mix.

Commission only

Compensation comes entirely from sales. A real estate agent on 3% of a $500,000 house earns:

$500,000 × 3% = $15,000

The formula is as short as it looks:

sale price × commission rate = compensation

Motivation is at its strongest here, because nothing sold means nothing earned. So is the risk, which is why this structure is common where the seller controls their own pipeline and unusual where they do not.

Base salary plus commission

Here a salesperson earns a base and a commission on top. Someone on $500 a month plus 1.5% who sells a $25,000 car earns:

$500 + $25,000 × 1.5% = $875

Two cars at the same price makes it $1,250. One car at $25,000 and two at $33,000 gives total sales of $91,000, so:

$500 + ($25,000 + $33,000 × 2) × 1.5% = $1,865

Written out in full, where n is the number of items sold at each price:

base + (n₁ × price₁ + n₂ × price₂ + …) × commission rate

The base is normally lower than a comparable salaried job pays, so selling is still the point, but it removes the cliff edge of a bad month. The "sales price" field above is total accumulated sales, so add the deals together before entering them.

Tiered commission

The rate changes as sales accumulate. A plan might pay 3% on the first $20,000, 5% from $20,000 to $25,000, and 10% above $25,000.

The point people get wrong: someone selling $27,000 does not earn 10% of $27,000. They earn 10% only on the part above $25,000. Each rate applies to its own slice, exactly like income tax brackets:

$20,000 × 3% + $5,000 × 5% + $2,000 × 10% = $1,050

That is $600 plus $250 plus $200, an effective rate of 3.89% rather than 10%. The flat misreading would give $2,700, more than twice the real figure. In general:

t₁ × c₁ + (t₂ − t₁) × c₂ + … + (sales − tₙ₋₁) × cₙ

where c is each tier's rate and t is each tier's upper limit, up to the highest tier reached. On the defaults above, $200,000 with 3% to $20,000 and 5% beyond earns $600 + $9,000 = $9,600, an effective 4.80%.

One variant is worth knowing because it behaves very differently. Some plans are retroactive, sometimes called back-to-dollar-one: crossing a threshold re-rates everything sold below it at the higher rate, so that $27,000 really would pay $2,700. Retroactive tiers create a large jump in pay at each threshold and a strong incentive to push a deal over the line before the period closes. The calculator above uses the standard marginal method; if your plan is retroactive, apply the top rate to the whole amount instead.

The parts of a pay plan the formula leaves out

Reading a commission plan means checking a handful of terms that decide what the percentage is actually worth.

Draw. An advance against future commission, paid so income does not swing wildly month to month. A recoverable draw is a loan repaid out of later commission, so a slow quarter leaves you owing the company. A non-recoverable draw is a floor that is never clawed back. The difference between the two is significant and is not always obvious in the paperwork.

Clawbacks. If a customer cancels, refunds, or fails to pay, many plans reverse the commission already paid. Common in insurance, subscription software, and anywhere revenue arrives over time rather than at signing.

Caps and accelerators. A cap stops commission above a ceiling, and predictably stops selling with it. Accelerators do the opposite, raising the rate past quota, which is the tiered structure used deliberately.

Revenue or margin. Paying on gross margin rather than revenue changes behaviour immediately, because a discount then costs the salesperson directly. Plans that reduce commission when a discount is granted exist for the same reason, and they make sellers noticeably less willing to cut price to close.

What counts as a sale. Booked, invoiced, shipped, or paid. On long sales cycles the gap between these is months of cash flow.

Quota and OTE. On-target earnings is base plus commission at 100% of quota. A 50/50 split between base and variable pay is a common benchmark in software field sales, and the ratio tells you how much of the advertised number is guaranteed.

Real estate, where most people meet commission

A residential sale in the U.S. has traditionally carried a total commission around 5% to 6% of the price, split between the listing brokerage and the buyer's brokerage, then split again between each brokerage and its agent. So an agent's share of a 3% side is well under 3% once the brokerage takes its cut, and marketing costs come out of what remains.

This changed in August 2024 following the National Association of Realtors settlement. Offers of compensation to buyer brokers can no longer be published on the MLS, and buyers working with an agent must sign a written agreement setting out that agent's fee before touring homes. In practice commissions are now negotiated more openly and more often, so treat any quoted percentage as a starting point rather than a standard.

Commission and the law

Two points that come up repeatedly, both U.S.-specific.

Commission-only pay does not remove minimum wage obligations. Under the Fair Labor Standards Act, a non-exempt employee must still receive at least minimum wage for all hours worked in a workweek, whatever their commission comes to. A separate provision, section 7(i), exempts some commissioned retail and service employees from overtime, but only where their regular rate exceeds one and a half times minimum wage and more than half their pay over a representative period comes from commission.

Commission is also taxed differently at the point of payment. The IRS treats it as supplemental wages, which employers commonly withhold at a flat 22% federally, rising to 37% on supplemental wages above $1 million in a year. That is withholding, not the tax owed. A big commission check often looks over-taxed and evens out at filing, so judge the plan on gross pay and use our Take-Home Pay Calculator for the net.

Reading the result

The effective rate is the figure worth watching in the tiered calculator. It is total commission divided by total sales, and on a marginal structure it always sits below the top tier rate while creeping toward it as sales grow. The curve chart shows exactly that: a kink at each threshold, with the line steepening as higher rates take over.

If you are designing a plan rather than checking one, build it in the second calculator and slide the sales price up and down. Where the line bends is where behaviour changes, and putting a threshold just above typical performance is what makes a tiered plan do its job. The Percent Calculator and Margin Calculator cover the neighbouring arithmetic.