Standby Generator Install Price Calculator

1. Equipment and fees

Generator cost to you ($)

Transfer switch ($)

Pad and mounting ($)

Permit and inspection fees ($)

Subcontractors: plumber, concrete, crane ($)

Startup and commissioning ($)

2. Gas and electrical runs

Gas pipe run (feet)

Gas pipe ($ per foot installed)

Gas meter or regulator upgrade ($)

Conduit and wire run (feet)

Conduit and wire ($ per foot)

3. Crew, risk and margin

Install hours on site (per person)

People on the crew

Labour ($/hour per person)

Driving (hours per person)

Callbacks (% of jobs)

Cost of one callback ($)

Margin wanted (% of the price)

Deposit (% of the price)

Minimum charge ($)

4. Service plan (optional)

Service plan price ($ a year)

What one plan year costs you ($)

Customers who take the plan (%)

Years you keep them

5. Size check: what must stay on (optional)

Air conditioner (tons)

Well pump (horsepower)

Sump pumps (number)

Electric range (1 = yes, 0 = no)

Electric water heater (1 = yes, 0 = no)

Lights, outlets, fridge, furnace fan (watts)

Enter the job and your costs, or load the example, then click Price this job.

Result

The same fixed price if the install runs over

Extra install hours	Hours per person	Cost	Profit	Margin

The price at other margins

Margin	Price	Profit

The arithmetic, and what it leaves out

Cost is generator, transfer switch and pad, plus the gas run (feet times your price per foot, plus any meter or regulator fee), plus the electrical run, the permit, subcontractors and commissioning, plus labour.
Labour is install hours plus driving, times people, times the rate. The expected callback is the callback rate times what one callback costs you.
Price is cost divided by one minus your margin, never below your minimum charge. The deposit target is what you buy before install day over the price.
The overrun table keeps the quoted price and stretches only the install hours.
The size check adds up the running watts you list, then swaps the largest motor's running watts for its starting surge (3.5 times for an air conditioner, 3 for a well pump, 2.5 for a sump pump) and rounds up to a common size.
Not modelled: sales tax, licences and insurance, utility or engineering fees, trenching beyond what you type, local code and clearance rules, and a real load calculation. Follow your code and the manufacturer; this only prices the job.

Common questions

How do I price a standby generator installation?

Add the generator, transfer switch and pad, the gas run and any meter upgrade, the electrical run, the permit, subcontractors and commissioning, and labour for the install days including the drive, plus the expected cost of a callback, then divide by one minus your margin. This tool does that and shows the price, the profit and the cash you need before the install day.

How much deposit should I take on a generator install?

Enough to cover what you buy before the crew arrives: the generator, switch, pad, gas materials, permit and subcontractors. The tool shows that amount against your deposit percentage and the deposit that leaves you carrying none of it.

What happens to my margin if the install runs over?

On a fixed price every extra hour comes out of profit. The table shows the same quote at 0, 25, 50 and 100 percent more install hours, so you can see how much slack the price has before the job stops paying.

Is a service plan worth selling with a generator?

Usually, because it is recurring profit on a customer you already have. Enter the plan price, what the visit costs you, the share of customers who take it and the years you keep them, and the tool shows the expected profit per install.

What size generator does a house need?

The tool gives a rough screen: the running watts of the loads the customer wants backed up, plus the starting surge of the biggest motor, rounded up to a common size. It is not a load calculation. Size from the manufacturer's tables and the electrical code, and have a licensed electrician confirm.

What does this leave out?

Sales tax, licences and insurance, engineering or utility interconnection fees, trenching beyond what you enter, and local code requirements. It is a bidding aid, not a quote, and not electrical or gas advice.

Is my data uploaded?

No. Everything runs in your browser tab and nothing is sent anywhere. There are no accounts. The share link keeps your numbers in the link itself, which you choose whether to send.