MJMarginJob
Built for contractors & small service crews
Know before you quote

Price the job.
Protect your profit.

A clear, no-accounting-speak calculator for contractors who need to know what a job really costs—and what to charge.

No sign-upRuns in your browserYour numbers stay private
Job profit calculator

Enter the job numbers

Use your best estimates. You can change any number.

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Before sales tax
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hrs
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Your target

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Saved jobs

Pricing tool

Markup Calculator

Start with what the job costs. Set the profit margin you want. Get the customer price without mixing up markup and margin.

Step 1

Cost and target

Use the full estimated job cost.

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Customer price = cost ÷ (1 − target margin). A 25% margin is not the same as a 25% markup.
Cost control tool

Labor Burden Calculator

See what one paid hour really costs after payroll taxes, workers’ comp, benefits, and paid non-working time.

Step 1

Build the true hourly cost

The displayed values are a worked example. Replace every rate with current business records.

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Productive-hour cost = paid-hour cost ÷ (1 − paid non-working time). Rates vary by state, trade, insurer, employee, and business.
Scope control tool

Change Order Calculator

Price extra work with labor, materials, overhead, and profit shown separately—before the added work starts.

Step 1

Price the added scope

Enter only the extra work created by this change.

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hrs
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Document the description, schedule impact, and approval separately. This tool prices the numbers only.

Four tools. One clear price.

Move from true cost to a quote that protects your profit.

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Markup Calculator

Turn job cost and desired margin into a clean customer price.

Open calculator →
HR

Labor Burden

Find the true hourly cost after payroll taxes, insurance, and benefits.

Open calculator →
CO

Change Order Price

Price added labor, materials, overhead, and profit without guessing.

Open calculator →

Built for the person pricing the work

No finance dashboard. No spreadsheet setup. MarginJob uses plain labels, large touch targets, and a result you can read beside the truck, at the supply house, or before sending a quote.

✓Shows cost, profit, and margin separately
✓Explains the price needed for your target
✓Works on phone, tablet, and desktop

How the job profit calculation works

Add every cost required to complete the work, allocate overhead, then subtract that total from the customer price. Margin measures profit as a percentage of revenue—not as a percentage of cost.

Formula

  1. Labor cost = labor hours × true hourly labor cost
  2. Direct cost = materials + subcontractors + labor + other job costs
  3. Total job cost = direct cost + (direct cost × overhead rate)
  4. Profit = customer price − total job cost
  5. Profit margin = profit ÷ customer price
Example total cost$5,640.32
Price$8,500
Profit / margin$2,859.68 / 33.6%
Planning estimate only: sales tax, income tax, financing cost, retainage, callbacks, and contract risk are not added unless you include them in your inputs.

Job profit questions

What belongs in overhead?

Use a consistent allocation for costs that keep the business running but are not tied to one job, such as office expense, software, vehicles, and administrative time.

Is profit the same as cash flow?

No. A profitable job can still create a cash shortage if deposits, progress payments, retainage, or vendor payment dates do not line up.

Should sales tax be included?

Rules vary. The calculator treats customer price as pre-tax revenue. Confirm taxable items and tax handling for your location.