Commission Calculator
Whether you're the one earning the commission or the one paying it, the questions are the same: how much is the commission, and what's left of the sale? Enter the sale amount and rate — and, for real-estate-style arrangements, an agent's share — to see every figure at once.
Commission on a sale
Example: 6% of a 350,000 sale is 21,000.
New to the base-confusion traps behind splits, tiers, and stacked discounts? The companion guide, Commission and discount arithmetic, walks through each one with worked fictional examples, and the full set of guides sits on the guides hub.
The arithmetic of a commission
Commission = sale amount × rate ÷ 100 — a straight percentage, which is why a general percentage calculator can do the first step. What this page adds is the rest of the picture in one pass: on a 350,000 sale at 6%, the commission is 21,000 and the seller's side of the ledger keeps 329,000. Every number here is generated by the same tested function the form uses, at build time.
The engine does only two things with your inputs, and does them in a fixed order. First it validates: the sale amount must be greater than zero, the rate must fall between 0 and 100, and anything non-numeric or outside the documented range comes back as a plain, readable error instead of a number. Then it multiplies — sale by rate, divided by a hundred — and subtracts that result from the sale to get what it calls the net to the seller. Nothing is rounded between those steps; the two decimal places you see are produced only by the display layer, exactly as the methodology describes. A 18,500 sale at a 4.5% rate, for instance, returns a commission of 832.5 and a net of 17,667.5.
When no split is involved there is a quiet identity worth noticing: the commission is exactly the rate percent of the sale. The 5% rate on the 4,800 simple example yields 240, and 240 is, by construction, 5% of 4,800. That sounds trivial, but it is a fast sanity check for a misplaced decimal — if the commission is not visibly the right fraction of the sale, a digit has gone astray in the rate before any of the later figures can be trusted.
Splits: a percentage of a percentage
Where agents work under a broker, the commission itself gets divided, and the split is quoted against the commission — not the sale. A 50% share of the example's 21,000 commission is 10,500, which works out to 3% of the sale price. Quoting "I'm on 50%" and "I earn 3% of the sale" describe the same paycheck, and conflating the two framings is the standard source of commission surprises. If you're converting commission earnings into an hourly or annual equivalent, the salary calculator takes it from here.
The share need not be an even 50/50. Supply any share between 0 and 100 and the remainder goes to the broker: a 65% agent share of a 120,000 sale at 6% splits the 7,200 commission into 4,680 for the agent and 2,520 for the broker. The engine then restates both as a percentage of the sale — 3.9% and 2.1% respectively — because that is the figure people actually set beside a flat "I earn this much of every deal" arrangement when comparing offers.
Reading the effective percentage of the sale
The two restated percentages are what a split is usually read for, and they follow a rule that makes them easy to predict. The agent's cut as a percentage of the sale equals the rate times the share, divided by a hundred — the sale amount cancels out of the arithmetic completely. On the alternative split above, 6 times 65 over 100 is 3.9%, and that same 3.9% holds whether the sale is 120,000 or ten times that. The consequence is practical: a percentage-of-sale quote is portable across deal sizes in a way a raw dollar amount is not, which is why it is the right number to carry when comparing two plans rather than two individual paychecks.
The restatement also means the books always reconcile without adding the shares by hand. The commission plus the net to the seller is always the whole sale, and the agent's amount plus the broker's amount is always the whole commission. Both identities hold at full internal precision before any display rounding, so if the printed figures ever look a cent off, that is the six-decimal display policy showing through rather than an error in the split — the methodology sets out exactly how and when that rounding is applied, and why a tiny nonzero result is never shown as a bare zero.
The home example makes both checks concrete. Its 21,000 commission and 329,000 net add back to the whole 350,000 sale, and on the even split the agent's 10,500 and the broker's 10,500 add back to the whole 21,000 commission. Neither sum is a figure the engine stores separately; each is a consequence of the same two operations, which is why the parts can never drift from the whole no matter how the split is set.
Three ways a commission figure gets misread
The arithmetic is simple; the misreadings are predictable. The first is treating the commission as take-home pay. The 21,000 on the example sale is a gross, pre-split figure: once a 50/50 split is applied, the agent sees 10,500, and tax has still not entered the picture at all. The second is assuming a larger sale earns a larger rate. It does not — unless a tiered schedule explicitly says so, the rate is flat, and a bigger sale simply multiplies the same percentage by a bigger base. The commission on the 350,000 example and on the 120,000 alternative differ because the sales differ, not because the 6% changed.
The third is reading "net to seller" as proceeds. It is only the sale minus this one commission; a real settlement subtracts other costs the engine never sees. Each of these is a base error rather than an arithmetic slip — the multiplication is right, but it was run against the wrong quantity, or read as answering a question it did not. The calculator shows every related figure at once precisely so the base is visible before it hardens into a number someone acts on.
Where the commission arithmetic stops
What this page computes is deliberately narrow, and knowing its edges is part of using it well. Every figure is gross — the commission before income tax, self-employment treatment, or any withholding, because those depend on a jurisdiction and a situation the engine knows nothing about. The net to the seller is the sale minus the commission and nothing else; it is not a closing statement.
The calculator also models a single rate on a single base. A tiered schedule that pays one rate up to a threshold and another above it is not one calculation but several added together — run each slice at its own rate, sum the results, and treat any single blended rate as a summary that exists only after the fact. Which base the rate applies to is your decision too: most arrangements pay on the sale amount, but a plan that pays on gross margin or on collected revenue is the identical multiplication with a different number in the sale field. The engine multiplies what it is given; choosing the right base, and the right plan, is judgment it cannot make for you. The commission and discount guide works a tiered schedule, stacked discounts, and the related price-change arithmetic through in full.
Frequently asked questions
Is commission charged on the sale price or on the profit?
This calculator applies the rate to the sale amount, the most common arrangement: 5% of a 4,800 sale is 240. Some sales roles instead pay on gross margin or collected revenue — if yours does, enter that base figure in the sale-amount field and the arithmetic is identical.
How does an agent-broker split work?
The split percentage is the agent's share of the commission, not of the sale. On a 350,000 sale at 6%, the commission is 21,000; a 50/50 split gives agent and broker 10,500 each — 3% of the sale apiece.
What does "net to seller" mean?
The sale amount minus the commission — what remains before any other costs of the transaction (transfer fees, taxes, outstanding balances). It answers the seller's first question, but it is not a closing statement.
How do I handle a tiered commission?
Tiered plans pay different rates on different slices — say 3% up to 100,000 and 5% beyond. Run each slice through the calculator at its own rate and add the results; a single blended rate only exists after the fact.
Is the commission shown before or after tax?
Before. Commission income is typically taxable and often subject to self-employment treatment, but rates vary by jurisdiction and situation, so this page stays with the gross arithmetic.
What inputs will the calculator refuse to answer?
The sale amount must be greater than zero, and both the commission rate and the agent's share must sit between 0 and 100. A share of exactly 100 is allowed and simply gives the whole commission to the agent. Anything non-numeric, infinite, or outside the documented ±10¹⁵ range is reported as an explicit error rather than guessed at, so a mistyped figure never silently becomes a plausible-looking answer.
Does the agent's percentage of the sale depend on how large the sale is?
No — and this is a useful check. The agent's effective cut as a percentage of the sale equals the rate multiplied by the share, divided by 100, and the sale amount cancels out entirely. A 6% rate with a 65% share is 3.9% of the sale whether the sale is 120,000 or ten times that. The money changes; the proportion does not.
Can I work backwards from a known commission to the sale amount?
This page runs forward: it takes the sale and the rate and returns the commission. To reverse it, divide the commission by the rate expressed as a decimal — a 240 commission at a 5% rate implies a 4,800 sale, which a general percentage calculator will confirm. The split fields do not reverse this way, because a share tells you nothing about the rate or sale that produced the commission it divides.
Sale figures are computed in your browser and never sent anywhere. Commission structures vary by contract — confirm the terms that govern yours. Implementation notes live on the methodology page.