If you run a service business, most bookkeeping advice was not written for you. It was written for retail and software companies and then loosely applied to everyone else. This is the version for operators with trucks, crews, and recurring work.
What bookkeeping actually is
Bookkeeping is the recording. Accounting is the interpretation. Your bookkeeper records what happened, reconciles it against the bank, and produces financial statements. Your CPA takes those statements and files your taxes.
The important consequence: your CPA can only be as good as the books they are handed. Most tax surprises are bookkeeping problems that arrived in April.
Cash or accrual, which one should you use
This is the first real decision and most owners never consciously make it.
Cash basis records revenue when money arrives and expenses when money leaves. It is simple, it matches your bank account, and it is what most small service businesses start on.
Accrual basis records revenue when you earn it and expenses when you incur them, regardless of when cash moves. It is more work and it is the only one that tells you the truth month to month.
For a service business with recurring contracts, accrual matters more than it does for most industries. If you collect a year of service up front and book it all as revenue that month, your year is a rollercoaster that has nothing to do with the work you performed. Accrual spreads it across the twelve months you actually service the customer.
The practical answer for most operators: run accrual for management reporting so your months are comparable, and let your CPA handle any cash-basis conversion for the tax return.
The chart of accounts, and why it decides everything
Your chart of accounts is the list of categories every dollar gets sorted into. It sounds like filing. It is closer to the foundation.
The split that matters most in a service business is cost of service against operating expense. Cost of service is what it costs to do the work: field labor, materials, fuel, vehicle costs on the route. Operating expense is what it costs to keep the doors open: rent, insurance, office staff, software, marketing.
Get that line in the wrong place and your gross margin is wrong, which means your pricing is wrong, which means everything downstream is wrong.
We tested how much this actually moves. Across 107 service business operators and roughly $230 million in combined revenue, running the same period under one standardized structure moved the median reported gross margin by 18 points. If you want the detail, see the full write-up on chart of accounts for a service business.
The monthly close
A month is closed when every account is reconciled and the statements are final. In practice, here is what should happen and roughly when.
- Days 1 to 5. All transactions imported and categorized. Bank and credit card accounts reconciled to the statement.
- Days 5 to 10. Accounts receivable and payable updated. Deferred revenue adjusted for prepaid contracts. Payroll accrued.
- Days 10 to 15. Statements produced and reviewed against the prior month and against the budget.
If your financials routinely arrive after the 20th, they are a historical record rather than a management tool. It also helps to see how monthly bookkeeping actually runs before you decide who should do it.
The three reports and what each one tells you
Profit and loss
Revenue minus expenses over a period. It tells you whether the business made money. It does not tell you whether you have any.
Balance sheet
What you own, what you owe, and the difference, at a single moment. This is where receivables, equipment, and debt live. Most owners ignore it, and it is where the cash answers usually are.
Cash flow statement
How cash actually moved. It reconciles the profit number to the bank balance and explains the gap between them. In a service business with slow-paying commercial accounts, this is often the most useful of the three.
Job costing, the thing most service businesses skip
Job costing means assigning revenue and direct cost to individual jobs, routes, or service lines rather than lumping everything together.
Without it you know the company made money. With it you know which work made the money, which is the only version that lets you price, hire, or cut anything with confidence.
It is not an add-on you bolt on later. It requires the chart of accounts to be built for it from the start, which is why retrofitting it is a real project.
Do it yourself, or hire it out
DIY makes sense when the business is small enough to hold in your head. One truck, no employees, revenue under roughly $200,000. A clean QuickBooks file and monthly discipline is genuinely enough.
It stops making sense at the point where the questions get harder than the records. Once you have crews, recurring contracts, and more than one service line, the constraint is no longer recording transactions, it is structuring them so they answer questions.
For what the options cost, see what bookkeeping should cost. If you are in one specific trade, we go deeper on pest control books specifically.
Common mistakes
Mixing personal and business spending. It makes every report unreliable and it weakens the legal separation of the entity. One business account, one business card, no exceptions.
Booking prepaid contracts as immediate revenue. Makes your good months look better than they are and your quiet months look like failure.
Filing everything as overhead. The default in most generic charts of accounts, and the reason so many service businesses have a gross margin that means nothing.
Waiting for tax season. Books reconstructed in March are books nobody used to make a decision all year.
Never comparing to anything. Your numbers only mean something against a reference point. Your own history is a start. Other operators your size is better.
Common questions
What is the difference between bookkeeping and accounting?
Bookkeeping is recording and reconciling transactions and producing financial statements. Accounting is interpreting those statements, planning, and filing taxes. Most service businesses need bookkeeping monthly and accounting a few times a year.
Should a service business use cash or accrual accounting?
Accrual for management reporting, because it makes months comparable and handles recurring contracts correctly. Many still file taxes on a cash basis. Your CPA can run both.
How often should the books be closed?
Monthly, finished within about fifteen days of month end. Quarterly is too slow to act on and annual is only useful for filing taxes.
What is the most common bookkeeping mistake in service businesses?
Putting cost of service in overhead. It is invisible, it is in most default charts of accounts, and it makes gross margin meaningless. In our 107-operator study the median business was affected by 18 percentage points.
Where to start
If you do one thing after reading this, pull your last P&L and check what percentage of your total spend is sitting in overhead. If it is much above half, your cost of service is probably in the wrong place and your margins are not telling you what you think they are.
FRAXN keeps the books for 250+ service operators and $450M in managed revenue, all of them in the trades.
