What is bookkeeping?

By Book Keeping Pros
Sources checked 15 Oct 2026

Definition

Bookkeeping is the process of recording a business's financial transactions, such as sales, purchases, payments and receipts, and keeping those records organised and up to date. Good bookkeeping gives the business accurate figures for its reports, its decisions and the records it is required to keep.

Day to day, bookkeeping means entering transactions, matching them to bank statements, keeping track of unpaid bills and invoices, and filing the documents behind each entry. How often that happens depends on the volume of activity: a busy retail business may need attention every few days, while a consultant who sends a handful of invoices can often keep up with one session a month.

The result is a set of books from which the business, or your accountant, can produce reports such as the profit and loss statement and the balance sheet. Kept current, the same books tell the owner at any point in the year how much cash is on hand, which customers are late paying and which bills fall due next.

Business bookkeeping generally uses double entry, where every transaction is recorded in at least two accounts, one debited and one credited, so the books can be checked for balance. The records can live in a spreadsheet, a cash book or accounting software, but each entry still needs a source document such as an invoice, receipt or bank statement. Two early choices shape the rest: cash or accrual accounting, which sets when sales and costs are recorded, and the layout of the chart of accounts, which sets where they land.

In Australia

The ATO says businesses are legally required to keep records of the transactions its record-keeping rules cover, and that most records must be kept for 5 years. Records must be in English or easy to convert to English, and stored in a way that protects them from being changed or damaged. It adds that the minimum information on a record generally includes the date, amount and description of a transaction, what it was for and, where relevant, how the parties to it are related.

Companies have a further rule. Section 286 of the Corporations Act 2001 requires a company to keep written financial records that correctly record and explain its transactions, and to keep them for 7 years after the transactions are completed.

For records kept digitally, the ATO asks that they be identifiable, labelled or indexed as they are stored. Where an expense is partly for the business and partly personal, it expects clear documents showing the business share.

Common mistakes

Letting entries pile up until the end of the financial year, when the documents behind them are harder to find.
Mixing personal and business spending in one account without marking which is which.
Entering transactions from the bank alone and throwing away the receipts and invoices that explain them.
Coding the same kind of expense to a different account each month, so one month's report cannot be compared with the next.
Skipping bank reconciliations, so missed or doubled entries go unnoticed for months.

Common questions

What is the difference between bookkeeping and accounting?

Bookkeeping is the recording side: entering transactions, reconciling accounts and keeping the records in order through the year. Accounting builds on those records, using them to prepare financial statements, interpret the results and give advice. In a small business the bookkeeper keeps the books current month by month, and your accountant draws on them for year-end work. The cleaner the bookkeeping, the less time that later work tends to take.

Why is bookkeeping important for a small business?

Current books are how an owner sees whether the business is making a profit or a loss while there is still time to act on it. The ATO lists the benefits of accurate and complete records as including easier cash flow monitoring so payments go out on time, a clear view of money owed in both directions, sounder business decisions, and being able to show the business's financial position to lenders and prospective buyers.

What is the difference between bookkeeping and record keeping?

Record keeping means holding on to the documents that show what happened, such as invoices, receipts, contracts and bank statements, in a safe and organised way. Bookkeeping uses those documents to enter each transaction into the accounts so the business can report on it. Each depends on the other: books without records behind them cannot be checked, and records that are not entered in the books do not appear in any report.

Related terms

Related service

Small business bookkeeping

Your books kept current, every month.

More about small business bookkeeping

Sources

Overview of record-keeping rules for business
Australian Taxation Office. Current at 18 June 2026 (QC60718), released 18 June 2026. Checked 15 October 2026.
© Australian Taxation Office for the Commonwealth of Australia Licence: ATO website copyright notice (copy, adapt and distribute, without implying ATO endorsement).
Corporations Act 2001, sections 9 and 286
Federal Register of Legislation, Office of Parliamentary Counsel. Compilation No. 149, 19 September 2026, released 19 September 2026. Checked 15 October 2026.
Based on content from the Federal Register of Legislation at 15 October 2026. For the latest information on Australian Government legislation please go to https://www.legislation.gov.au. Licence: CC BY 4.0.