Sales Margin Calculator
Calculate job costs, gross profit, revenue-based commission, remaining contribution and target pricing from your own inputs. Runs locally in your browser.
Created by Tim Nussbeck — 20+ years in home improvement sales, founder of GhostRep
Know what remains from the job.
Enter each cost once. Use zero where a category does not apply. Commission is calculated on revenue; overhead is a dollar allocation for this job.
Complete all seven inputs to see the calculation.
Created by Tim Nussbeck
Founder of GhostRep · 20+ years in home improvement sales
Every tool on this page comes from real field experience and GhostRep's production AI workflow, not filler templates.
What Is a Sales Margin Calculator?
See what remains from a job after the costs you enter. Separate materials, labor, other direct costs, commission and allocated overhead so the same expense is not counted twice. The calculator above uses arithmetic in your browser; it does not ask an AI model to estimate the answer.
Use a consistent cost definition and compare an estimate with actual job costs after completion. Gross margin shows revenue less direct job costs. The remaining contribution after commission and overhead is shown separately. A target margin is your planning choice, not a published industry guarantee.
Compare the result with the job estimate and your cost records. Change an input to see how the commission basis, allocated costs or target margin affect the required revenue.
How to Use This Tool
Enter the job revenue
Use the contract revenue for the scenario you are reviewing. Keep revenue and cost entries consistent about taxes and other amounts included in the job.
Separate direct costs
Enter materials, direct labor and other direct costs once each. Add the dollar amount of overhead allocated to this job separately. Use zero for a category that does not apply.
Set commission and your target
The commission input is a percentage of revenue. The target is the contribution percentage remaining after the entered costs. If your compensation plan uses another basis, calculate its dollar cost separately and include it once in the relevant cost field with commission set to zero.
Review the result and assumptions
The results update as you change inputs. Compare the estimate with actual job costs later. Target revenue assumes entered dollar costs stay fixed and commission remains a percentage of revenue.
Common Mistakes to Avoid
| What Most Reps Do | What Works Better |
|---|---|
| Counting a cost twice | If commission is already included in a direct-cost entry, set the commission percentage to zero. |
| Treating allocated overhead as a universal rate | Enter the dollar allocation your company uses for this job and reconcile it with actual costs. |
| Assuming a computed target is a market price | The result is the revenue required by your entered costs and target; it does not establish what a buyer will pay. |
Pro Tip
Load the illustrative example to see the arithmetic, then clear it and enter your own figures. No job information is sent to an AI model.
Frequently Asked Questions
Does this calculator use AI?
No. It calculates locally in your browser from the numbers you enter. It does not send the job data to the generation API.
What commission basis does it use?
Commission is a percentage of revenue. For another basis, compute the commission amount using your plan and include it once in other direct costs, with the percentage set to zero.
What does remaining contribution mean?
Revenue less entered direct costs, revenue-based commission and allocated overhead. It excludes any cost you did not enter and is not automatically company accounting net profit.
Why can a target be impossible?
When the target percentage plus commission percentage reaches or exceeds 100%, there is no positive share of revenue left to cover the entered dollar costs under this model.
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