A chart of accounts is the list of categories your bookkeeping system uses to record every transaction. Each sale, bill, loan payment and owner withdrawal is posted to one of these accounts. Because every report is built from them, the chart of accounts quietly decides what your profit and loss and balance sheet can tell you.

The five account types

Almost every chart of accounts is organised into five groups:

  1. Assets: what the business owns, such as bank accounts, receivables, inventory and equipment
  2. Liabilities: what it owes, such as credit cards, loans, sales tax collected and payroll taxes withheld
  3. Equity: the owner's stake, including contributions, draws and retained earnings
  4. Income: revenue from sales and services
  5. Expenses: the costs of running the business

Assets, liabilities and equity appear on the balance sheet. Income and expenses appear on the profit and loss.

Why the structure matters for tax

The IRS explains in Publication 583 that businesses should choose a recordkeeping system that clearly shows income and expenses, and its recordkeeping guidance stresses keeping records that support each item on a return. A chart of accounts that roughly mirrors the expense lines on your business return makes year-end preparation much faster, because your preparer can map accounts to lines instead of digging through a single "miscellaneous" account.

How many accounts do you need?

Fewer than most people think. A good test is whether you would make a different decision if two costs were reported separately. If you would, keep them separate; if not, combine them. Many small businesses work well with fifteen to thirty expense accounts. Use sub-accounts or classes when you need more detail, for example to report by location or service line, rather than creating near-duplicate accounts.

Accounts that are often missing

  • Sales tax payable: tax collected belongs to the state, not to you, so it should never sit in income
  • Payroll liabilities: withheld taxes and deductions waiting to be paid over
  • Owner contributions and draws: money moving between you and the business is not income or expense
  • Undeposited funds or clearing accounts: to match card processor batches to bank deposits
  • Loan principal: so loan repayments reduce the liability instead of appearing as expenses

Common mistakes

  • Creating a new account every time a new vendor appears
  • Using "Ask my accountant" or "Uncategorized" as a permanent home
  • Mixing cost of goods sold with operating expenses, which hides gross margin
  • Renaming accounts mid-year so comparisons no longer line up

Key terms

  • Account number: an optional numeric code that keeps accounts in a predictable order, for example assets starting with 1 and expenses with 6.
  • Sub-account: a child account that rolls up into a parent, useful when you need detail without cluttering the main report.
  • Class or location: a tag applied to transactions to report by department, property or channel across all accounts.
  • Inactive account: an account hidden from day-to-day use but kept so history stays intact.
  • Trial balance: a list of every account and its balance, used to check that debits equal credits before reports are prepared.

Keeping it tidy

Review the chart once a year. Merge accounts that hold only a few transactions, mark unused ones inactive rather than deleting them, and write a one-line description for each account so anyone posting transactions uses them consistently.

If your chart has grown messy, our bookkeeping services include a clean-up as part of onboarding. You may also find our guide to monthly bank reconciliation useful.