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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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 →
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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

Price the added scope before work begins

A change order should recover the direct cost of the extra work, the overhead it creates, and the profit margin required by your business. The calculator applies overhead to direct cost, then prices the total cost for the selected margin.

Worked example

$780 in materials, $250 in equipment or subcontractors, and 12 hours at $38 produce $1,486 in direct cost. At 12% overhead, total cost is $1,664.32. A 25% margin produces a change order price of $2,219.09 and estimated profit of $554.77.

Price is only one part of a change order. Document the revised scope, exclusions, schedule impact, payment terms, and written approval.

Change order questions

Why include overhead and profit?

Extra work still consumes coordination, administration, insurance, tools, and business capacity. Direct cost alone does not recover those items.

Should work start before approval?

Contract requirements vary, but written approval helps establish scope, price, and schedule expectations before costs are incurred.

What is not included here?

Taxes, permit fees, bonds, financing, delay costs, and contract-specific markups are not automatic. Add them where applicable.

Latest Insights

Where contractor jobs quietly make or lose money.

Why a 20% Markup Is Not a 20% MarginThe pricing mix-up that shrinks margin.5 Costs Contractors ForgetThe lines that vanish from a quote.Why Busy Contractors Still Lose MoneyA full schedule is not a profitable one.

All insights →  ·  Pricing by trade →