Sales Commission Calculator
Commission plans fail people in two places: tiered structures that get computed the wrong way (marginal tiers versus cliff tiers can differ by thousands of dollars on a single deal), and splits where the headline rate bears little resemblance to what actually reaches the rep after the side split, the brokerage cut, and the desk fee. This calculator handles all three structures — flat rate, marginal tiers with a per-tier breakdown, and a full broker-split waterfall — and shows the effective rate at every step. Amounts are formatted in US dollars; the math itself is currency-agnostic.
How to use the sales commission calculator
- Pick a tab: Flat rate for a single percentage, Tiered rates for accelerator plans, Broker split for real-estate style waterfalls.
- Flat: enter the sale amount and rate — commission is sale × rate.
- Tiered: edit the tier caps and rates. Each dollar is paid at its own tier's rate (marginal), with a per-tier breakdown table. Check the compare box to see the cliff/retroactive alternative where the whole amount earns the achieved tier's rate.
- Split: enter the sale price, total commission percentage, your side's share, your split with the brokerage, and any flat desk fee — the waterfall shows every cut down to your net.
- Fix any red validation hints (overlapping or non-increasing tier caps) — the inline messages tell you exactly which cap to raise.
Worked example: the $120,000 deal where structures diverge
Take the default tiers — 5% up to $50,000, 8% from $50,001 to $100,000, 10% above — and a $120,000 sale.
| Band | Amount | Rate | Commission |
|---|---|---|---|
| 0 – $50,000 | $50,000 | 5% | $2,500 |
| $50,000 – $100,000 | $50,000 | 8% | $4,000 |
| Above $100,000 | $20,000 | 10% | $2,000 |
Marginal total: $8,500 (effective 7.08%). The cliff alternative pays the whole $120,000 at the achieved 10% tier: $12,000 — a $3,500 gap, over 40% more, from the same words in a plan document. Cliff plans also create perverse incentives near thresholds: at a $99,000 sale a cliff rep earns $7,920 (8%), while closing $1,001 more vaults them to $10,000 — so deals mysteriously cluster just past the threshold, and sandbagging clusters just before quarter-end. If you design plans, marginal accelerators avoid both distortions.
Frequently asked questions
What is the difference between marginal and cliff (retroactive) tiers?
Marginal tiers pay each band at its own rate, like income-tax brackets: on a $120,000 sale with tiers of 5% up to $50,000, 8% to $100,000, and 10% above, you earn 2,500 + 4,000 + 2,000 = $8,500. A cliff (retroactive) plan pays the entire amount at the achieved tier's rate: $120,000 × 10% = $12,000 — $3,500 more on the same deal. Always ask which structure your plan document means by “10% above $100,000”; the words are ambiguous and the money is not.
How is real-estate commission actually split?
A typical chain: total commission — traditionally 5–6% of the sale price in the US, always negotiable and under added pressure since the 2024 NAR settlement — splits between the listing and buyer sides, usually 50/50; then each agent splits their side with their brokerage, commonly 50/50 to 70/30 in the agent's favor, and franchise or desk fees come off after that. On a $400,000 home at 5.5% with a 50% side share, a 70% agent split, and a $500 desk fee, the agent nets $7,200 — about 1.8% of the sale price, despite the 5.5% headline.
What is a draw against commission?
A draw is an advance paid against future commissions. A recoverable draw must be paid back from later earnings — if you draw $5,000 monthly and earn $4,000 in commission, you carry a $1,000 deficit forward. A non-recoverable draw resets each period with nothing owed. When evaluating a sales offer, ask which type it is and what happens to the balance if you leave: in some states a recoverable draw can legally become a debt you owe the employer on departure.
How do I read OTE in a sales job offer?
OTE (on-target earnings) = base salary + commission at 100% of quota. A “$100,000 OTE” role with a 60/40 split pays $60,000 in base and $40,000 in variable only if you hit quota. The questions that matter: what fraction of reps hit quota last year (industry surveys put the median near 50–60%), is the plan capped, are accelerators marginal or cliff, and when are clawbacks applied for churned customers.
Why does the calculator complain about my tier caps?
Tiers must be strictly increasing and contiguous, or the math is ambiguous. If tier 1 ends at $50,000 and tier 2 also says $50,000 (or less), the bands overlap and some dollars would be counted twice; if the last tier has a cap, sales above it would earn nothing — usually not what the plan intends. The inline hints name the exact tier and the minimum cap that fixes it; leave the final tier's cap blank to mean “no limit”.
How is commission income taxed in the US?
It depends on your worker classification. For W-2 employees, commission is supplemental wages: employers typically withhold federal tax at a flat 22% on commission paid separately from salary (37% on amounts over $1 million), but it is taxed at your ordinary rates when you file — the flat withholding often over- or under-shoots. For 1099 independent contractors (including most real-estate agents), commission is self-employment income: you owe self-employment tax of about 15.3% on net earnings plus income tax, you make quarterly estimated payments, and business expenses are deductible. Which side of that line you sit on changes both the withholding you see and the deductions you can claim.
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