How this calculator works
No black box - this is the arithmetic the tool runs, written out.
commission = job price × rate ÷ 100
- job price
- The contract value the commission is calculated on.
- rate
- Commission percentage.
A single percentage. The thing worth pinning down is not the arithmetic but the basis: commission on gross contract value and commission on gross profit produce very different cheques on the same job.
Profit-based plans align a salesperson with the health of the business, because discounting to close a deal comes out of their own commission too.
What it looks like with real numbers
Starting from
- Job price
- $14,000
- Commission rate
- 8%
The working
14,000 × 8 ÷ 100 = 1,120
$1,120 commission
Reading it: Simple arithmetic - the real question is the basis. Eight percent of contract value and eight percent of gross profit are very different cheques on the same job, and they create very different incentives.
How the calculation runs
Four operations, in this order. Nothing is hidden behind a button.
- Take the job price the plan pays on.
- Apply the commission percentage.
Getting your inputs right
The answer is only as good as what goes in. This is where estimates usually go wrong.
Agree the basis in writing
Contract value or gross profit. This is the term that causes disputes, and it should not be ambiguous.
Define when it is earned
On signature, on job completion, or on payment collected. These are materially different for cash flow on both sides.
Write down the chargeback rule
What happens on a cancellation or a job that never gets paid should be settled before it happens, not after.
What changes your number
A calculator applies an average. These are the things that decide where in the range you actually land.
- Commission basis Gross value plans reward volume; gross profit plans reward disciplined pricing. Profit-based plans make discounting cost the salesperson too.
- Tiers Many plans step the rate up past volume thresholds, which this flat calculation does not model.
- Splits Where a setter and a closer both touch a deal, the commission is divided and the effective rate per person is lower.
- Draws A draw against future commission is an advance, not extra pay, and it has to be reconciled.
Common mistakes
Every one of these is something people genuinely do, and most of them cost real money.
- Paying on contract value with no floor A percentage of gross rewards closing at any price. Without a margin floor it can pay best on the least profitable work.
- Paying before the money arrives Commission paid at signature on a job that later cancels or goes unpaid has to be clawed back, which is uncomfortable and often unsuccessful.
- Leaving the plan verbal Commission disputes are almost always definitional. Write down the basis, the timing, and the chargeback rule.
How roofing commissions work
Roofing sales pay is usually a percentage of the job price (often 5-10%) or a share of the gross profit (which rewards protecting margin). Profit-based plans discourage discounting to close. This tool figures a simple price-based commission; for profit-based plans, price the job first with the markup & margin calculator.
Cost ranges reflect 2026 U.S. installed prices (BLS producer/labor data, Remodeling Cost vs. Value, and manufacturer pricing). Your real price depends on your roof, region, and pro - see the full cost guide.
Where this stops being accurate
This calculates gross commission on the basis you enter. It does not model draws, tiered rates that step up at volume thresholds, chargebacks on cancelled or unpaid jobs, or splits with a setter.
This is a free estimating tool, not a quote. When you want a number somebody will stand behind, get matched with local pros - they measure the roof before they price it.
The terms on your quote, explained
A roofing quote is written in trade vocabulary. These are the words that actually change what you are paying for.
- Square
- 100 square feet of roof surface. The unit the entire trade orders, prices, and quotes in - a 2,400 sq ft roof is 24 squares.
- Pitch
- The slope, written as rise over a 12-inch run. A roof climbing 6 inches per 12 horizontal inches is "6/12".
- Decking (sheathing)
- The structural panels over the rafters that everything else fastens to. Its condition is unknown until the old covering is off.
- Underlayment
- The water-resistant layer between decking and covering. Synthetic or felt; it is the roof's second line of defense.
- Ice-and-water shield
- A self-adhering membrane at eaves and valleys that seals around fasteners. Commonly required by code in freeze-thaw climates.
- Flashing
- Metal that seals the joins - around chimneys, walls, valleys and vents. Most roof leaks are flashing failures, not covering failures.
Roofing Commission Calculator questions
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