Bookkeeper for Garage Door Companies

How does money flow through a garage door company?

A garage door company makes money from doors, parts, new installations, repairs, and emergency calls, and each of those keeps its own income line. That is not just bookkeeping neatness. The trades have different margins, different ticket sizes, and different payment habits, so lumping them together hides which part of your business actually pays.

Most of what you bill runs at one of two pricing models. Flat rate is a fixed price says what it is, no matter how long the job takes. That is a standard thing on a routine repair or clean install. Time and materials is a real hours plus the parts, and it fits a scope that grows, like a simple opener replacement that becomes damaged tracks and a new rail. The books need to record which model you used, because flat rate hides loose time and time and materials creates the materials bills you must collect.

The money flows differently by the source. A repair call is usually one flat invoice paid on the spot, emergency work commonly a higher price and a slower check, and a commercial project can have a deposit, progress payments, and a final invoice. Good books do not call all of that same thing, because a deposit is not that comfortable until the job is closed.

Which costs eat the most in this trade?

Parts and installs are the biggest direct cost, what you spend on springs, cables, rollers, openers, panels, tracks, hinges, remotes, and the hours the technician gives the site. It is where the profit actually lives, and parts alone can easily be the number that breaks a job.

The overhead side is where the edge gets back up and eats the margin. Trucks eat fuel, maintenance, insurance and tires; tools and equipment go out; lead generation and marketing bills show up every month; warehouse or shop rent, utilities, general liability and auto insurance, licensing, and accounting all add to the stack. One source, a licensed California garage shop, says a typical operation spends from $100,000 to $250,000 or more every year before the owner sees any of it (https://www.admgaragedoors.com/resources/california-business-costs). Those lines are the ones to watch, because they arrive even on the slowest week.

The ghost in the next is cost of callbacks. Warranty work is a zero-dollar invoice that still consumes parts, truck time and a technician. It never shows up on a normal P&L because the invoice line is zero, so it quietly disappears from the margin. Good bookkeeping counts each one and puts it in the cost lines it truly came from.

"We aim for a minimum of 40% profit per install.", an owner in r/GarageDoorService, 2025, unverified, https://www.reddit.com/r/GarageDoorService/comments/1jr9c09/profit_margins_on_selling_garage_doors/. That 40% number is a field quote, and what survives by the time overhead is net, not the number. The working range most sources agrees on for a whole shop is 10 to 20% net. Profit per install and profit of the whole shop are two different numbers, and a good monthly close shows both.

There is also a tax structure plant inside the items. A shop making $40,000 to $50,000 a year net usually will own an S-corp election, because the owners only pay self-employment tax on the drawn salary, not on the rest of the profit (https://www.calculustax.com/garage-door-accountant). The books have to be clean enough to follow a reasonable salary, source decisions like that one, and both taxes are worth some planning.

How do I track parts and cost of goods sold?

Have your cost of goods in two real buckets, the parts you put on the door and the labor that installs them. When every part sits in one bucket called 'parts', the P&L cannot tell you whether springs are selling differently from openers, or whether a bunch of panels is worth the room it eats.

In practice, that means what arrives off a supplier truck goes to the parts bucket, and what is used on a job gets moved, in that same job, to the job's cost, not to an expense category. The technician put in the hours, those hours belong on that job. None of that is a year-end trick; it is how you actually know whether a $4,000 install left you any money after the parts, the straps and the drive-time.

How do warranty work and callbacks get recorded?

A callback is a $0 job. You send the truck, you use parts, you pay a technician, and no one pays you for it. Bookkeeping treats it the way it is, a line that costs the business money, even though the invoice the customer received says zero.

So the right way to record a callback is simple: the parts and the labor go to cost of goods sold, as they do on a paid job, and the revenue line stays empty. That makes every callback and its margin drain away. Owners often avoid the subject, so the $0 jobs tend to vanish and the books look healthier than the bank feels. When we work with a garage door client, we ask what the callback count is, and we schedule it to come up in the month-end review (https://homeservicescorecard.com/articles/garage-door-business-profitability/).

Should I track each job separately, or is a profit and loss enough?

Each job should have its own revenue and its own cost, or you cannot tell the difference between a money-making call and a job that just wore out a truck.

The more clear that is, the faster you can answer the most common question: which of these lines of jobs actually keep the business standing when overhead is gone.

What does the books tell me the business is worth?

Valuation starts with the books because the standard measure is a multiple of annual profit or earnings. The informal rule tossed around in owner forums is that a small service company often sells for two to three times its yearly profit (unverified, https://www.facebook.com/groups/2815042615255352/posts/24426116090388026/), and the formal market studies put garage door type ranges on seller's discretionary earnings from about 1.8x to 4.5x, in a familiar government range setting (https://www.tupelosmb.com/blog/how-to-value-a-garage-door-business).

But your own example says it all. An owner who keeps every spring and every hour in its own bucket can walk a buyer through what the shop really makes now. A set of books that shows only a single line of income at the end of the year gives a buyer two choices: an adjustment or a walk. If a sale ever comes to mind, the cleanest thing you can do is keep the books current, ready and complete.