Accounting fundamentals

Why it matters

Every financial decision you make, from pricing to hiring to borrowing, rests on your accounting records. If the records are wrong or late, the decisions are guesses. Clean books also make BAS and tax time cheap and quick, reassure lenders, and are the first thing a buyer or investor will ask to see. Owners who understand the basics also get far more value from their accountant, because they can ask better questions.

The accounting equation

Everything in accounting flows from one relationship: what the business owns (assets) equals what it owes (liabilities) plus what belongs to the owners (equity). Assets include cash, money customers owe you, stock and equipment. Liabilities include supplier bills, loans, GST you have collected but not yet paid, and wages owed. Equity is what is left over: the money you put in plus the profits you have kept in the business.

Double-entry bookkeeping exists to keep this equation balanced. Every transaction touches at least two accounts. When you buy a $5,000 laptop on the business credit card, assets go up by $5,000 (equipment) and liabilities go up by $5,000 (credit card). Nothing is created or lost; it just moves. Modern software does the double entry for you, but knowing the logic helps you spot when something looks wrong.

Cash versus accrual accounting

Cash accounting records income when money arrives and expenses when money leaves. It is simple and matches your bank balance, which is why many sole traders start there. Accrual accounting records income when it is earned (when you invoice or deliver) and expenses when they are incurred (when you receive the bill), regardless of when cash moves.

The difference matters most when customers pay slowly or you buy stock ahead of sales. Under cash accounting a strong month of invoicing looks like a weak month because nobody has paid yet. Accrual accounting shows the true trading result and reveals the gap between profit and cash, which is exactly the gap that gets growing businesses into trouble. Note that the method you use for your books and the method you use for GST reporting can differ; the ATO sets eligibility rules for cash-basis GST reporting, so check the current rules or ask your tax agent.

The chart of accounts is your filing system

The chart of accounts is the list of categories every transaction is coded to. A good chart is short enough to read on one page and detailed enough to answer the questions you actually ask. Split revenue by the two or three things you sell, split cost of sales from overheads, and keep owner drawings and loans out of the expense lines.

Resist the urge to create an account for everything. Forty well-chosen lines beat two hundred vague ones. If you cannot explain what a line is for in one sentence, merge it. Set up the chart with your accountant once, then change it rarely, so reports stay comparable from year to year.

• Revenue: one line per product or service family, plus other income.
• Cost of sales: materials, subcontractors, direct labour, merchant fees.
• Operating expenses: rent, wages, marketing, software, insurance, vehicles, professional fees.
• Balance sheet: bank accounts, receivables, payables, GST, PAYG, super, loans, equipment, equity.

Reconcile or the reports are fiction

Reconciliation means matching every line in your accounting software to a line on the bank statement, and explaining anything that does not match. If the books say you have $42,000 and the bank says $38,500, one of them is wrong and it is never the bank. Unreconciled books produce reports that look precise but are not.

With bank feeds this is a weekly ten-minute job rather than a monthly ordeal. The discipline is to never let it slide more than a fortnight, and to reconcile credit cards, loan accounts and payment platforms, not just the main account. A clean reconciliation at month end is the signal that your profit and loss can be trusted.

How to set up accounting that works

1. Open a dedicated business bank account Every business dollar in and out goes through it. No exceptions, even as a sole trader.
2. Choose cloud accounting software Pick one your accountant works in. Connect the bank feed on day one.
3. Build a short chart of accounts Set it up with your accountant and keep it stable so reports compare across years.
4. Decide cash or accrual Accrual books for anything beyond the simplest sole trader; check GST reporting eligibility separately.
5. Reconcile weekly Match every transaction to the bank and code it. Chase missing receipts the same week.
6. Close the month Confirm reconciliations, review the profit and loss and balance sheet, and write down three things you noticed.
7. Review with your accountant quarterly Use BAS time to ask what the numbers mean, not just to lodge.

Real-world example

A Hobart landscaper discovers the gap between profit and cash

Derwent Gardens is a two-person landscaping business run by Marcus. For his first year he tracks everything on a spreadsheet by bank balance. The account looks healthy, so he buys a second trailer. Two months later he cannot pay his BAS: the healthy balance included $14,000 of GST he had collected on behalf of the ATO and $9,000 in customer deposits for jobs he had not yet bought materials for.

His accountant moves him to accrual books in cloud software with a bank feed. Now his balance sheet shows GST owing as a liability and deposits as unearned income, so the “real” cash he can spend is visible. He reconciles every Friday, closes each month, and opens a second bank account where he parks GST and tax as invoices are paid. The next BAS is paid on time without a scramble, and he can see for the first time that his planting jobs make twice the margin of his paving jobs.

Common mistakes

• Treating the bank balance as profit The balance includes GST, deposits and money for unpaid bills. Read the balance sheet, not the ATM screen.
• Letting reconciliation slide Three months of uncoded transactions takes days to fix and makes every report meaningless in the meantime.
• A chart of accounts with 200 lines Too much detail hides the picture. Keep it to what you will actually compare month to month.
• Paying personal costs from the business account It creates untidy owner loans, wastes bookkeeping time and clouds whether the business is profitable.
• Using the accountant only at tax time Once-a-year books are compliance, not management. Quarterly conversations are where the value is.

KPIs to track

• Days to close the month From month end to reconciled reports. Under ten working days is a sensible target for a small business.
• Unreconciled transactions Should be close to zero at any time. A growing number is the earliest warning the books are drifting.
• Accounts receivable days Average time customers take to pay. Compare it to your stated terms; the gap is your collection problem.
• Tax and GST set aside Cash held against the next BAS and income tax as a percentage of what will be due. Aim for 100%.

Frequently asked questions

Do I need a bookkeeper or an accountant?

They do different jobs. A bookkeeper records and reconciles transactions, often weekly. An accountant (ideally a registered tax agent) prepares tax returns, advises on structure and reviews the big picture. Many small businesses use both; very small ones do the bookkeeping themselves and use an accountant for tax and advice.

Can I keep my books on a spreadsheet?

You can, but cloud accounting software with a bank feed is cheap, reduces errors, produces BAS figures automatically and is what your accountant will want. Most owners who switch wish they had done it sooner.

What records do I have to keep and for how long?

The ATO requires records that explain all transactions, generally kept for five years, and electronic copies are acceptable. Check the ATO website for the current requirements for your structure.

What is the difference between an expense and an asset?

An expense is used up in the period (rent, wages, fuel). An asset lasts longer and sits on the balance sheet (vehicle, equipment), with its cost spread over time as depreciation. Tax rules on instant write-offs change often, so ask your tax agent.

Key takeaways

• Assets equal liabilities plus equity; every report is a view of that one equation.
• Accrual books show true performance and expose the gap between profit and cash.
• A short, stable chart of accounts makes reports comparable and readable.
• Reconcile weekly; unreconciled books produce confident-looking fiction.
• Use your accountant for questions and decisions, not just lodgements.