Service Price & Profit Margin Calculator

The calculator builds the job's cost from its parts rather than asking for one lump figure, so you can see which part of it is eating the margin.

Labor hours and labor cost ($/hr) – The hours you bill for the job, and what an hour of technician time actually costs you. Use the target billable rate from the Hourly Labor Rate Calculator — it already carries payroll tax, benefits, and overhead.

Parts cost (optional) – Materials, equipment rentals, subcontractors, permits, disposal fees. Labor plus parts is what most contractors call Cost of Goods Sold (COGS): the cost that exists only because this job exists.

Overhead allocation (optional) – This job's share of the expenses that would exist anyway. Office rent, insurance, software subscriptions, vehicle expenses, fuel, advertising, utilities, administrative salaries, licensing fees.

Total hours paid for (optional) – Every hour the job cost you, not just the hours on the invoice: drive time, setup, the second trip for the part. This is the field most people skip, and it is the one that turns a margin into a labor-efficiency picture.

Then you choose what you want out of it. Price for a target margin takes the margin you want and returns the price that hits it. Margin for a target price goes the other way — give it the number you were going to put on the estimate and it tells you what that price actually leaves you.

How to Calculate the Profit Margin

The profit margin measures how much of your revenue remains after covering your costs. The basic formula is:

Profit Margin (%) = (Profit ÷ Total Revenue) × 100

One note on which profit. The calculator subtracts everything you entered, so if you filled in the overhead allocation, the profit it reports is already net of overhead rather than a gross figure. Leave overhead blank and you get gross profit instead.

Example

You complete a residential HVAC installation:

• Total revenue: $8,500
• Labor: 30 billable hours at $90/hr = $2,700
• Parts and materials: $2,000
• Cost of Goods Sold (COGS): $4,700
• Overhead allocated to the job: $1,600
• Total hours paid for: 40

Step 1: Add up the cost. $2,700 + $2,000 + $1,600 = $6,300

Step 2: Calculate the profit. $8,500 − $6,300 = $2,200

Step 3: Calculate the profit margin. ($2,200 ÷ $8,500) × 100 = 25.9%. Twenty-six cents of every dollar billed remains after covering direct costs and allocated overhead.

Step 4: Check labor efficiency. Of the 40 hours the technician was paid for, only 30 were billable to the customer — a billable ratio of 75%. The other 10 went to drive time, setup, and paperwork. Divide the profit two ways and you get two different numbers:

• $2,200 ÷ 30 billable hours = $73.33 per billable hour
• $2,200 ÷ 40 hours paid for = $55.00 per hour paid for

Why both numbers matter. Profit per billable hour is the flattering one, and it is easy to misread: it rises whenever the denominator shrinks. Run the identical job — same price, same costs, same 30 billed hours — but let it swallow 50 paid hours instead of 40, and the margin still reads 25.9% and the profit per billable hour still reads $73.33. Neither figure noticed the ten hours you lost. The billable ratio drops to 60% and profit per hour paid for drops to $44.00, and those are the two that did.

This is why the billable ratio matters as much as the margin percentage. Two jobs can post the same 25.9% margin, and the one with the higher billable ratio earns more for the time it actually took.

Revenue doesn't measure business success on its own. Two companies can generate the same sales and produce very different profit depending on their labor efficiency, material costs, overhead, and pricing strategy.

Regularly calculating profit margin helps you identify underpriced services, improve estimating accuracy, and monitor job performance — which is what ultimately informs your growth strategy.