What bookkeeping costs a field service company, and what sets the fee
Updated 16 October 2026
A field service company sends a technician or a crew to the customer: plumbing, heating and cooling, electrical, garage doors, window cleaning, lawn care. Outsourced bookkeeping for these companies is usually quoted as one fee each month. The fee follows the work inside the books. The count of transactions, the count of accounts to reconcile, the payroll, the job costing and the state of the books today all move it. This page explains each of those, the ways a bookkeeper can bill, and what the monthly fee should buy.
What sets the monthly fee
Two heating and cooling companies with the same annual sales can receive different quotes. Sales are one input. The work behind the sales is the larger one. Six things set the hours a bookkeeper spends each month.
| Driver | What it adds to the month |
|---|---|
| Transactions | Each invoice, customer payment, card charge and supplier bill has to be coded and matched. |
| Accounts | Each bank account, credit card and loan gets its own reconciliation at month end. |
| Payroll and 1099s | Crews, prevailing-wage jobs and subcontractors paid on a 1099 add records to keep. |
| Job costing | Coding labor, parts and overhead to each job takes longer than coding to a general expense line. |
| Sales and use tax | Tracking what is owed in one or more jurisdictions adds a recurring task. |
| State of the books | Books that are behind need a one-time catch-up before the monthly work starts. |
Window Genie's 2026 Franchise Disclosure Document (FDD), the disclosure a franchisor hands a prospective franchisee, puts the average business at $549 a job. Averan's reading of the Window Genie page works that back to 866 jobs a year on $475,663 of sales. That is about 72 jobs a month, and each one is an invoice to record and a payment to match. A Window Genie owner's bookkeeping fee tracks those 72 jobs more closely than the $475,663.
Four ways a bookkeeper can bill
A flat monthly fee is the most common model. The owner knows the cost when the engagement starts, and the line goes into the budget at the same figure each month. Tiered packages set out levels of service. One tier covers the books only. A second adds payroll. A third adds job costing and reporting, so the owner moves up a tier as the company grows. Hourly billing is the third model. The bill follows the hours, and the hours rise in the busy season, when the owner has the least time to review a bill. The fourth is a cleanup fee, a one-time charge to bring old books current. It is quoted on its own because the work is a project with an end date.
A cooling company's bookkeeper logs 18 hours in February and 31 hours in July, when the call volume peaks. On an hourly bill, July costs 1.72 times what February costs. On a flat fee, both months cost the same amount. The figures are an illustration.
What the monthly fee should buy
- Every bank and credit card account reconciled each month.
- A chart of accounts set up for trade work, with separate lines for labor, parts, subcontractors and vehicles.
- Every transaction coded, with money owed to the company (receivables) and money the company owes (payables) tracked.
- A monthly package holding the profit and loss, the balance sheet and the month-end cash position.
- The same named contact each month, with every close reviewed by a senior accountant.
- Add-ons on request: job costing, payroll and tracking of sales tax owed.
Precision Garage Door Service's average business sold $5,737,824 in 2025 at $1,213 a job, which the Precision Garage Door page works out to 4,730 jobs a year. That is about 394 jobs a month, or about 18 a day. Each month the bookkeeper matches about 394 customer payments to deposits before the reconciliation can close. A Precision Garage Door owner asks how that matching is done and how many days it takes.
A staff bookkeeper or an outside firm
A staff bookkeeper's cost is more than the salary. Payroll taxes, benefits, software licenses and training all sit on top of it. An outside firm spreads review and backup across a team. When one person is out sick or leaves, the books still close on schedule, and a second person checks the work. A staff hire sits in the office each day, and that matters less when the books, the bank feeds and the receipts all live in cloud software. The owner compares the full yearly cost of each option with the work it covers.
A company plans a staff bookkeeper at a $52,000 salary. Payroll taxes add $4,000, benefits $8,000, software $3,000 and training $1,500. The full cost is $68,500 a year, which is $16,500 more than the salary alone. The owner sets the $68,500 against the yearly total of an outside quote. The figures are an illustration.
Why cleanup is quoted on its own
A cleanup brings neglected books up to date before the monthly service starts. The work is larger than a month-end close. Months of backlog get reconciled, transactions coded to the wrong account get moved, and the chart of accounts may be rebuilt. The bookkeeper scopes it once, prices it once and finishes it. The monthly fee starts after the books are current.
An electrical contractor's books were last reconciled in March, and it is now December. The company runs 2 bank accounts and 1 card account. The cleanup covers 9 months across 3 accounts, which is 27 reconciliations before the first regular close. The figures are an illustration.
What this means for an owner
The quote follows transactions, accounts, payroll, job costing, sales tax and the state of the books. A count of jobs per month is a closer guide to the work than annual sales. A flat fee stays the same in July and February. A staff hire costs salary plus taxes, benefits, software and training. A cleanup is a separate project that ends before the monthly fee begins.
Get a fee for your company
Send Averan your monthly job count, your list of accounts and whether you need job costing, and Averan will quote one monthly fee. The bookkeeping service page sets out what Averan does each month: reconciliations, the close and the monthly reports.
Where to next
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What happens next
Reading about it and having it done are different things. Here is exactly what happens if you want the second one.
- The call takes thirty minutesYou describe the business and where the numbers are letting you down. We give you an expert view of your situation, and what we would start with. There is no pitch deck.
- We look at the fileYou give us read access to the books as they are. We come back with what is wrong, what it will take to fix, and whether the answer is bookkeeping, controller work, or something else.
- We send a written scope and a priceIt lists what we do each month, what you get, the date it lands and the fee. We agree it before anything starts, and it does not change unless you agree.
- We take over the books and close the first monthWe set up access and systems and enter the opening balances. The first close lands on the date in the scope, and every one after it does too.