Chart of accounts: designing one you will not have to redo

A chart of accounts is the list of categories every transaction is filed under: the accounts that make up your balance sheet and your profit and loss. It sounds administrative and it is not — it decides which questions your accounts can answer. A business that lumps all marketing into one account can never say what a channel costs, and no amount of reporting later recovers information that was never captured.

The opposite failure is more common. Someone creates sixty expense accounts in the first month, and within a year half of them hold one transaction each, half the transactions are in the wrong one, and every report needs manual regrouping.

What a chart of accounts contains

• Assets: bank accounts, money owed to you, stock, equipment and other things you own.
• Liabilities: money you owe — suppliers, loans, tax due, payroll not yet paid.
• Equity: what the owners have put in and what has been retained.
• Income: revenue, split by the lines of business you actually manage separately.
• Cost of sales: the costs that move with revenue, kept apart from overheads so gross margin is real.
• Expenses: overheads, grouped the way you would discuss them — people, premises, marketing, professional, technology.
• An account code per account, numbered in blocks by type so a code tells you where something sits.
• A one-line description of what belongs in each account, which is what keeps two people categorising the same way.

Number in blocks and leave gaps: assets 1000–1999, liabilities 2000–2999, equity 3000–3999, income 4000–4999, cost of sales 5000–5999, expenses 6000 upwards. The exact ranges matter less than leaving room — a scheme with no gaps forces new accounts to the end, and after two years the numbering tells you nothing.

Designing it

1. Start from the reports you want. Write the profit and loss you would like to read monthly, then create the accounts that produce it — not the other way round.
2. Ask your accountant for their standard chart for your entity type and jurisdiction, and start from that. It will match how your statutory accounts must be presented, which saves a mapping exercise every year.
3. Separate cost of sales from overheads deliberately. This one distinction produces gross margin, which is usually the most useful number in the business.
4. Split income only where you would act on the difference. Two revenue accounts you genuinely manage separately beat nine you never compare.
5. Add the description line for every account as you create it. Categorisation rules live in these sentences.
6. Keep it short at the start. Adding an account when a cost recurs is easy; merging fifteen unused accounts later means restating comparatives.
7. Review annually with your accountant: which accounts never move, which ones hide something worth splitting, which descriptions everyone ignores.

How detailed is detailed enough

The test is whether you would do something differently if the number changed. If knowing that software subscriptions cost more than expected would trigger a review, software deserves its own account. If you would never act on the split between stationery and printing, one account covers both. Where you need more granularity than the chart should carry — cost per project, per client, per site — the answer is usually a second dimension such as a tracking category or department code, not thirty more accounts.

Ettex Books is built around this: a chart of accounts structured the way accountants expect, double-entry journal entries with full debit and credit control, categories and auto-categorisation rules so recurring transactions file themselves consistently, attachments on any entry so the invoice sits with the transaction, multi-currency with rate tracking, instant search across all periods, and P&L, balance sheet and ledger export as PDF, CSV or XLS when your accountant asks. The written definitions — what belongs in each account — belong in Ettex Docs, and the sales side feeding revenue accounts sits in Ettex Invoices.

The boundary worth naming: Ettex Books does not come with a jurisdiction-specific statutory chart preloaded, does not file anything with a tax authority, and does not decide your accounting policies. It is a ledger with the structure you give it. Agree the chart with your accountant before you enter a year of transactions — that conversation is an hour, and skipping it is what produces the rebuild.

Provision and write-off need somewhere to land. A bad debt posted to a general expense line disappears from view, and a separate account for it is what makes the annual pattern visible.

Common mistakes

• Too many accounts too early, most of which end up holding one transaction.
• Cost of sales mixed with overheads, so gross margin is meaningless.
• Accounts named after suppliers rather than after what was bought — the supplier changes, the category does not.
• No description per account, so two people file the same cost in two places.
• A catch-all "miscellaneous" account that quietly grows into the largest expense line.
• Renumbering or merging mid-year, which breaks every comparison against last year.
• A chart that does not map to the statutory format, creating a manual reconciliation at every year end.

A chart of accounts is a decision about what your business will be able to see. Start from the report you want to read, separate cost of sales from overheads, write down what belongs where, and keep it short enough that everyone files the same way.