Commission Math Looks Simple Until Payday
“10% commission” sounds straightforward — until tiers, accelerators, quotas, and base salary enter the picture. Many sales plans pay different rates on different slices of your sales: 5% on the first $10,000, 8% on the next stretch, 12% beyond that. Your effective rate ends up somewhere in between, and eyeballing it almost always gets it wrong.
This free commission calculator handles both worlds: a flat rate for simple plans, and a tiered structure that shows exactly what each slice of your sales earns. Add your base salary to see total take-home for the period.
Flat rate · tiered · with base salary
Please enter sales of $0 or more and a rate between 0% and 100%.
Your commission
Flat-rate commission
Tiered plan used here: 5% on the first $10,000, 8% on sales from $10,001–$25,000, 12% above $25,000 — a common accelerators-style structure. Your employer’s tiers may differ; adjust the idea, not just the numbers. Estimates only — actual payouts depend on your plan’s quota, clawbacks, and payout timing.
How to Use This Calculator
- Choose your structure: flat rate for one percentage on everything, or tiered for the 5% / 8% / 12% accelerator-style plan.
- Enter total sales for the period and your rate (flat mode).
- Add base salary if your plan includes fixed pay — it’s added to commission for total earnings.
- Click Calculate — see commission, effective rate, earnings per $1,000 sold, and (in tiered mode) what each tier paid you.
The Commission Formulas
Tiered: each slice of sales × its tier rate, then summed
Worked example (tiered)
$30,000 in sales on the 5% / 8% / 12% plan:
- First $10,000 × 5% = $500
- Next $15,000 × 8% = $1,200
- Final $5,000 × 12% = $600
- Total commission: $2,300 (effective rate 7.67% — not 12%, not 5%)
Splits: When One Commission Gets Divided Twice
In real estate and many agency models, the headline rate is only the start — the commission is then split, sometimes twice. Work a standard chain:
- A home sells for $400,000 with a 5% total commission: $400,000 × 5% = $20,000.
- The listing side and buyer’s side split it evenly: $10,000 to each side’s brokerage.
- An agent on a 70/30 split with their brokerage keeps 70% of their side: $10,000 × 70% = $7,000 (before any desk or transaction fees).
So an agent who “earned 5% on a $400,000 sale” actually banks $7,000 — 1.75% of the price. Splits commonly improve as an agent’s annual production grows, and some brokerages replace splits with an annual cap or flat per-deal fees. Whenever you evaluate an offer, run the full chain with this calculator: total commission first, then your side, then your split.
Working Backwards: The Sales Behind an Income Goal
Flip the formula around when you have a target. For a flat plan, sales needed = commission goal ÷ rate. Want $3,000 of commission at an 8% rate? You need $3,000 ÷ 0.08 = $37,500 of sales. Tiered plans take one extra step: run the calculator at a guessed sales figure, note the effective rate it reports, divide your goal by that rate, and run it again with the new figure — two passes converge on the real target, because the effective rate climbs as sales push into higher tiers. The same backwards logic exposes unrealistic quotas: if the plan’s best tier starts at a sales level no one on the team has ever reached, the advertised “top rate” is decoration, and the effective rate at your realistic volume is the number to negotiate around.
Common Commission Structures
| Structure | How it pays | Best for |
|---|---|---|
| Flat rate | One % on all sales | Simple, predictable plans |
| Tiered / accelerators | Rate rises with volume | Motivating bigger months |
| Base + commission | Fixed salary + % of sales | Income stability + upside |
| Gross-profit based | % of profit, not revenue | Margin-focused businesses |
Who This Calculator Is For
- Salespeople checking a paycheck or forecasting what a big month pays.
- Freelancers & affiliates comparing offers with different rate structures.
- Sales managers modeling what plan changes cost the company.
- Job seekers translating “OTE” (on-target earnings) into realistic monthly numbers.
Tips before you sign a comp plan
- Ask whether commission is paid on revenue or gross profit — profit-based plans pay less on discounted deals.
- Check when commission pays out (on booking, on cash collection?) and the clawback rules for refunds.
- Find the quota: some plans pay nothing below quota, then accelerate above it.
- Model your realistic sales, not your best month — tiers only help if you reach them.
Frequently Asked Questions
How do you calculate sales commission?
Multiply total sales by the commission rate: Commission = Sales × Rate. With a base salary, add it on top: Total Earnings = Base + Commission. For tiered plans, apply each tier’s rate only to the slice of sales inside that tier, then add the slices together.
What is a good commission rate?
It varies widely by industry: roughly 5–10% in retail and inside sales, 10–20% in B2B software and services, and 20–30%+ for independent reps with no base salary. Higher rates usually mean lower (or zero) base pay — compare total OTE, not just the percentage.
How does tiered commission work?
Different portions of your sales earn different rates. For example, with tiers of 5% to $10k, 8% to $25k, and 12% above: $30,000 in sales earns $500 + $1,200 + $600 = $2,300. The rate applies per slice, not to the whole amount — that’s the detail most people get wrong.
What is the difference between commission and base salary?
Base salary is fixed pay you receive regardless of sales; commission is variable pay tied to performance. Plans combining both give stability plus upside. “100% commission” roles have no base — higher risk, usually higher rates.
Are commissions taxed differently?
In the US, commissions are “supplemental wages” and employers often withhold federal tax at a flat 22% (as of recent rules), though your actual tax depends on total annual income. Set aside the difference if your withholding doesn’t match your bracket.
What is a commission clawback?
A clawback lets the company reclaim commission if a deal falls through — a refund, chargeback, or cancellation. Most plans spell out a clawback window (often 30–90 days). Always read that clause before counting a big commission as spent.
Is commission calculated on revenue or on gross profit?
Both models exist, and the difference is real money. A revenue plan pays the rate on the sale price — 8% of a $50,000 deal is $4,000 regardless of costs. A gross-profit plan pays on the margin: the same $50,000 deal at a 30% margin yields $15,000 of profit, and 30% of that is $4,500. Profit plans pay more on healthy deals but punish discounting — cut the price to win the deal and your own commission falls with the margin — so check the basis before comparing two offers.
What is a draw against commission?
A draw is an advance: the company pays you a set amount each period (say $2,000 a month) against commissions you are expected to earn later. If your commissions that period come to $2,600, you receive the extra $600; if they come to $1,400, you typically owe the $600 difference back against future earnings. A recoverable draw is a loan against future performance — a guaranteed (non-recoverable) draw is not. Ask which kind you are signing.
Final Thoughts
The headline rate is never the whole story — tiers, base pay, quota, and timing decide what actually lands in your account. Run your real numbers above before you celebrate a big month or sign a new plan.
Planning Your Income?
Convert your earnings with our wage conversion calculator and see overtime impact with our overtime calculator.