Bookkeeping for service businesses: a setup that survives busy season

Bookkeeping is the daily and weekly work of recording what came in and what went out, with proof. Accounting is what your accountant does with those records: tax returns, adjustments, advice. Most owners of small service companies do some of their own bookkeeping, or have a spouse or office manager do it, and hire out the accounting. That split works well as long as the bookkeeping is kept current.

This guide covers the setup and habits that matter for a contractor or home-service company. It is general information, not tax or accounting advice. Your accountant should approve your chart of accounts and your accounting method.

Why start by separating business and personal money?

Because every later step depends on it. When the business has its own checking account and its own card, the bank statement becomes a complete list of business transactions. When personal groceries and business materials share a card, someone has to sort them one by one, forever.

The SBA puts protection first among the reasons for a business bank account, saying that a separate business account gives some limited protection from personal liability. If you have not done it yet, start with our bank account setup guide, then come back here.

Pay yourself by transfer from business to personal (an owner draw, or payroll if your structure calls for it). Do not pay personal bills from the business account. When you slip, record it as a draw, not an expense.

What records does the IRS expect you to keep?

The IRS says that, except in a few cases, the law does not require any special kind of records; you may choose any recordkeeping system suited to your business that clearly shows your income and expenses. What it does expect is supporting documents. Its records page groups them like this:

For vehicle and travel expenses, the IRS points to Publication 463 for what you need to substantiate. For a service company with trucks, that usually means a mileage or use log of some kind; ask your accountant what method you use.

A photo of each receipt, attached to the transaction in your bookkeeping software the day you buy, beats a glovebox full of faded paper. Many apps let you snap and attach receipts from a phone.

How long should you keep records?

The IRS rule is that you must keep records as long as they may be needed to prove the income or deductions on a tax return. Its retention guidance gives the usual periods:

• 3 years in the ordinary case.
• 6 years if you fail to report income that is more than 25% of the gross income shown on the return.
• 7 years if you claim a loss from worthless securities or a bad debt deduction.
• At least 4 years for employment tax records, after the tax is due or paid, whichever is later.
• Indefinitely if you do not file a return.
• Property records (a truck, equipment) until the period of limitations expires for the year you dispose of the property, because they support depreciation and gain or loss.

The IRS also reminds you that insurers and lenders may want records longer than the tax rules require. Digital storage is cheap; many owners simply keep everything.

What chart of accounts fits a service business?

A chart of accounts is the list of categories every transaction lands in. Default lists in bookkeeping software are built for every kind of business, so they are long and vague. A service company does better with a short list arranged so the P&L reads cleanly:

• Income: one line per main service line (for example, residential, commercial, maintenance plans), plus a line for other income.
• Job costs: field wages, field payroll taxes and workers' comp, materials, subcontractors, equipment rental and disposal for specific jobs.
• Overhead: office wages, vehicles, insurance, rent, marketing, software and phones, professional fees, bank and card fees, office supplies, training.
• Balance sheet items: bank accounts, credit cards, loans, equipment, customer deposits, sales tax collected (if you collect it), owner draws.

Fewer categories, used consistently, give a better report than many categories used randomly. Our guide to reading a profit and loss statement shows why the job cost and overhead split matters so much.

Which transactions trip up service businesses?

• Card payouts. When a customer pays $500 by card, your processor may deposit something less than $500 after fees. If you record the deposit as $500 of revenue you are wrong, and if you record the net amount as revenue you understate sales and lose the fee as an expense. Record the full sale, then the fee. Matching payouts to invoices is far easier when your invoicing and payments live in the same system; see online payments for contractors.
• Customer deposits. A deposit for a job you have not done yet is money you owe in work. Your accountant may want it held as a liability until the job is complete, especially on accrual books.
• Sales tax. If you collect sales tax, it is not your revenue. It belongs to the state and should sit in a liability account until you file. Whether your work is taxable at all depends on your state; see sales tax on services explained.
• Subcontractors. Get a signed W-9 from every subcontractor before you pay them anything. The IRS uses Form 1099-NEC to report nonemployee compensation, and the filing thresholds and deadlines are in its instructions. Having the W-9 on file in January saves a scramble.
• Loan payments. Split each payment into principal (reduces the loan balance) and interest (an expense). Recording the whole payment as an expense overstates costs.
• Equipment. A large purchase usually goes on the balance sheet as an asset, and your accountant decides how it is depreciated or expensed.

Should you use cash or accrual bookkeeping?

IRS Publication 538 describes the two main methods. With the cash method, income counts in the year you receive it, actually or constructively. With an accrual method, you report income when earned and deduct expenses when incurred. Many small service businesses keep books on a cash basis because it matches the bank account. Eligibility and switching rules are technical, so the decision belongs to your accountant. What matters for you is consistency, and knowing which basis a report is on before you read it.

What weekly and monthly routine works?

Every week (15 to 30 minutes):

1. Categorize every new bank and card transaction. Attach receipts that are missing.
2. Match customer payments to invoices and follow up on anything past due.
3. Check that every finished job was invoiced. Unbilled work is the most expensive bookkeeping error a service company makes.

Every month:

1. Reconcile each bank and card account to its statement.
2. Run the P&L, the balance sheet and an aging report of unpaid invoices.
3. Move money set aside for taxes; see estimated taxes for self-employed contractors.

Every year: collect W-9s, issue 1099s if required, send your accountant clean books and the asset purchase list, and keep the filed return with its records.

Do it yourself, hire a bookkeeper, or both?

The SBA lays out three options: a CPA, who typically costs more; a bookkeeper, for day-to-day functions at a lower cost; and online services. A common pattern for a company with a few trucks is a part-time bookkeeper for the weekly work and a CPA for taxes and year-end. Owners who do their own books should still have an accountant set up the chart of accounts and review it once a year.

The biggest time saver is upstream of bookkeeping. If quotes, jobs, invoices and payments live in one system, the books can be fed from clean data instead of rebuilt from memory. It is why we put our own service companies on a custom CRM and why we build the same kind of system for other owners. If you would like us to look at how leads and jobs flow through your business today, start with a free system quote.

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