Commission Calculator

How to use this calculator

Four modes, each built for a different commission structure. Select the one that matches how your compensation is set up.

Percentage commission

The simplest structure. Three inputs:

Sale Amount is the total value of the deal you closed. Use the gross sale value, not the net. If you sold a $50,000 contract, enter $50,000.

Commission Rate (%) is the percentage your employer or agreement pays on the sale. A standard SaaS rep might earn 8-10% of contract value. Real estate agents typically earn 2.5-3% on each side. Car sales often run 20-25% of dealer profit (not sale price).

Base Salary is optional. If you earn a base plus commission, enter it here. The calculator adds it to your commission to show total payout. Leave it blank if you’re working pure commission.

Tiered commission

Earned when your commission rate increases as you hit volume milestones. You’ll see 3 rows pre-filled as a starting point.

Each tier has an upper cap and a rate. The calculator automatically applies the correct rate to each portion of the sale. A $45,000 sale with tiers at 5% up to $10,000, 8% on $10,001-$40,000, and 12% above $40,000 doesn’t earn 12% on the whole amount. It earns 5% on the first $10,000, 8% on the next $30,000, and 12% on the final $5,000.

Edit the tier thresholds and rates to match your specific plan. The third tier’s cap is automatic (everything above tier 2).

Fixed commission

Number of Sales is how many units or deals you closed in the period. Commission Per Sale is the fixed dollar amount per transaction. Enter base salary if applicable.

Split commission

Use this when a commission pool gets divided among a team. Enter the total commission pool (the full amount to be split), the number of reps, then adjust individual percentages. The “Distribute Equally” button sets everyone to an equal share. The sum must equal 100% before the calculation runs.

What this calculator actually helps you figure out

Commission structures hide real compensation in ways that are easy to miss.

The most common one: a job offer lists 8% commission on a $800,000 annual quota. That sounds like $64,000 in commission. But the quota is OTE (on-target earnings) at 100% attainment. If average attainment across the team is 72%, your expected commission is actually $46,080. And if the structure is tiered with accelerators only kicking in above 100%, hitting 80% earns less per-dollar than hitting 110%.

Running the calculation before you sign or negotiate clarifies what the real expected payout is at different attainment levels. It also quickly shows how sensitive total comp is to changes in the rate or quota.

The formulas

All four modes use different core equations.

Percentage commission:

Tiered commission (applied to each bracket):

Fixed commission:

Split commission:

The effective rate output is only shown for percentage and tiered modes because it’s the most useful benchmark for comparison. For fixed commission, the relevant benchmark is effective hourly rate (total commission divided by hours worked), which you’d calculate outside this tool.

Real-world examples

SaaS account executive, annual quota

Base salary: $70,000. Commission rate: 9% of contract value. Quarterly quota: $200,000 ARR. This quarter you closed $187,000.

Real estate agent

Sale price: $725,000. Total commission to brokerage: 5%. Buyer’s agent split: 50/50. Your brokerage takes 30% of your side.

Freelance recruiter, tiered placement fee

Placed a candidate with a $120,000 base salary. Tier 1: first $60,000 of base at 15% = $9,000 Tier 2: $60,001–$100,000 at 18% = $7,200 Tier 3: $100,001+ at 22% = $4,400

Commission structures across industries

Pharma and medical device reps often have much larger base salaries relative to commission compared to pure sales roles. SaaS and tech sales tend to be the most variable: top reps regularly earn 2-3x their base in good years.

What accelerators do to your calculation

Many tiered commission plans include accelerators above quota. This is where compensation really separates.

A common structure: 8% on sales up to 100% of quota, then 12% on everything above quota. If your quota is $500,000 and you close $650,000, the last $150,000 earns 50% more commission per dollar.

Enter each tier and rate manually in the tiered mode to model this. The tier breakpoint is the 100% quota mark; the upper tier gets the accelerated rate.

Common mistakes

Using gross sale price instead of the commission base. In auto sales, commission is usually a percentage of dealer gross profit, not the car’s sale price. A $45,000 car with $2,800 gross profit at 25% commission earns $700, not $11,250. Always check what the commission base actually is before calculating.

Forgetting clawbacks. Many B2B commission plans include clawback clauses: if a customer cancels within 90-180 days, the commission is reversed. A $10,000 commission on a deal that churns in month two may net you nothing. Calculate expected commission on expected-to-retain revenue, not total bookings.

Conflating effective rate with any single tier rate. In tiered structures, the effective rate is always lower than the top tier. A plan with a 15% top tier rate doesn’t mean you earned 15% on the deal. Running the actual tiered calculation gives the honest effective rate.

Ignoring the draw period. Some commission jobs pay a “draw against commission” during ramp-up: you receive guaranteed income that gets paid back from future commissions once you hit targets. That guarantee isn’t additional money. It’s an advance. Including it in total compensation calculations overstates what you actually earned.

Tax on commission income

Commission is ordinary income in most jurisdictions. That matters because large commission payments can push you into a higher marginal bracket or trigger estimated tax obligations if your employer’s withholding doesn’t account for variable pay.

In the US, employers typically withhold at the supplemental wage rate (22% federal in 2024 for amounts under $1M). That’s often lower than your actual marginal rate if you’re a high earner. The gap between withheld tax and owed tax shows up as an underpayment at tax time.

Self-employed people on commission (freelancers, independent agents) owe self-employment tax of 15.3% on net earnings up to the Social Security wage base ($168,600 in 2024), plus regular income tax. A freelance recruiter keeping 100% of a $20,000 placement fee pays roughly $3,060 in SE tax before income tax. The gross commission is not the take-home amount.

Strategies worth knowing:

Quarterly estimated taxes. If your commission income is significant and not withheld at the right rate, set aside 25-35% of each payment and pay estimated taxes quarterly (IRS Form 1040-ES). The penalty for underpayment is minor but avoidable.

Timing recognition. For self-employed people using cash accounting, large commissions received in late December can often be deferred to January. That shifts the tax obligation to the following year. Not always practical, but worth knowing.

Business expenses. Independent agents and freelancers can deduct legitimate business expenses: home office, vehicle mileage for client visits, professional memberships, relevant software. Track these against each commission period to reduce taxable income.

The bottom line

Commission calculators exist because commission structures are designed to be complicated. Tiering, splits, accelerators, clawbacks, and variable bases make the actual payout difficult to calculate in your head.

Run the calculation before you close a deal to know what it’s worth. Run it before you accept a job to know what OTE actually means at realistic attainment. Run it before negotiating rates to see the dollar impact of each percentage point.

The effective rate output is the most useful single number: it tells you what fraction of the sale you actually kept, regardless of how complex the structure is. If you can’t explain your own effective rate, you don’t fully understand your compensation plan.