Build a clean, scalable chart of accounts from day one: numbering schemes, the accounts every small business needs, and the traps to avoid.
What a chart of accounts actually is
Think of it as a filing cabinet with labeled drawers. Every transaction gets filed into an account (a drawer), and accounts roll up into five big categories: assets (what you own), liabilities (what you owe), equity (what is left for the owners), revenue (what you earn), and expenses (what you spend). Most accounting software ships with a default chart — your job is to tailor it, not to invent it from scratch.
Step 1: Pick a numbering scheme
Account numbers group related accounts and leave room to grow. The classic scheme uses ranges by category:
| Range | Category | Example |
|---|---|---|
| 1000–1999 | Assets | 1010 — Business checking |
| 2000–2999 | Liabilities | 2010 — Business credit card |
| 3000–3999 | Equity | 3010 — Owner contributions |
| 4000–4999 | Revenue | 4010 — Service income |
| 5000–9999 | Expenses | 5010 — Office supplies |
Leave gaps between numbers (1010, 1020, 1030) so you can insert new accounts later without renumbering. Four digits look professional and sort cleanly in every system.
Step 2: List your real accounts
Walk through your actual money flows and give each a drawer. A typical small service business needs far fewer accounts than people assume:
- Assets: business checking, savings, petty cash, accounts receivable, equipment.
- Liabilities: business credit card, loans payable, sales tax payable, accounts payable.
- Equity: owner investment, owner draws, retained earnings.
- Revenue: one account per genuine revenue stream (services, products, consulting) — not per client.
- Expenses: the categories that matter for decisions and taxes — rent, payroll, software, marketing, travel, professional fees. See our categories list for the standard set.
Step 3: Name accounts precisely
"Miscellaneous" is where good bookkeeping goes to die. Name accounts so a stranger could file correctly: "Software subscriptions" beats "Tech stuff"; "Client meals — deductible" beats "Food". If you cannot explain what belongs in an account in one sentence, the name is wrong. Generate a first draft of category names with the accounting category generator, then sharpen each one against this test. Clear expense names also pay off later when receipts become reports — see our guide on how to write an expense report.
Step 4: Add sub-accounts sparingly
Sub-accounts (e.g. 5010 Software → 5011 Design tools, 5012 Hosting) give detail without cluttering the top level. Use them where you genuinely make decisions from the breakdown — marketing channels, cost centers, locations. Everywhere else, flat is fine. A chart with 200 accounts is a chart nobody maintains.
Step 5: Lock the structure and document it
Write a one-page guide: what each account is for, with two or three example transactions. This is what keeps a second bookkeeper, a VA, or future-you filing consistently. Revisit the chart once a year — add accounts for genuinely new activity, merge accounts that stayed empty.
Mistakes that haunt small businesses
- Too many accounts. Thirty well-used accounts beat a hundred half-empty ones.
- Personal and business mixed. No personal spending in the business chart, ever — it poisons every report.
- One giant "expenses" account. You cannot manage what you cannot see; split at least the big five (rent, payroll, marketing, software, travel).
- Renumbering mid-year. Renumber only at year-end, and keep a mapping of old to new.
- Revenue per client. Client detail belongs in invoices and CRM, not in the chart — one revenue account per stream.
Rule of thumb: if your profit-and-loss fits on one page and every line is a number you would act on, your chart of accounts is right-sized. The same care applies when you present the numbers: see our guide on budget report titles by audience for naming reports your readers will actually open.
FAQ
How many accounts does a small business need?
Most need 30–60. Freelancers can run on fewer than 30; product businesses with inventory need more. If you are past 100, you probably have clutter.
Can I change my chart of accounts later?
Yes — add accounts anytime, and merge or rename at year-end. Avoid renumbering mid-year because historical reports and tax filings reference the old numbers.
Do I need an accountant to set this up?
Not necessarily for a simple business, but a one-hour review with an accountant before your first tax year is cheap insurance — they will catch structural mistakes in minutes.
What is the difference between an account and a category?
Mostly vocabulary. "Account" is the formal bookkeeping term; "category" is what expense-tracking apps call the same thing. Our chart of accounts explainer covers the terminology.
Should inventory businesses do anything different?
Yes — add inventory asset accounts, cost-of-goods-sold accounts, and consider sub-accounts per product line. Inventory is where simple charts most often break.