Running a business in Australia means dealing with more than just customers and cash flow. There’s BAS lodgements, PAYG withholding, GST reconciliations, and a tax system that doesn’t forgive disorganisation. For most business owners, the financial side isn’t why they went into business. Getting it wrong, though, has real consequences.

These are the five mistakes we see most often, and what to do about each one.

1. Mixing personal and business finances

When personal and business transactions run through the same account, you lose visibility over both. It muddies actual business performance, makes expense tracking unreliable, and creates problems at tax time when your accountant is trying to work out what’s deductible and what isn’t.

The fix: open a dedicated business bank account and route all business income and expenses through it. If you’re paying yourself wages or drawings, transfer those as a line item. Don’t just spend from the business account whenever you need something.

2. Falling behind on record-keeping

Receipts get lost. Invoices pile up. Before long you’re spending a weekend before BAS is due trying to reconstruct three months of transactions from bank statements.

Capture receipts as they happen, reconcile weekly rather than monthly, and put BAS due dates in your calendar now. Quarterly lodgements are due 28 days after the end of each quarter. The ATO doesn’t offer extensions because you forgot.

3. Miscategorising expenses

Throwing everything under “miscellaneous” makes your Profit and Loss statement useless. You can’t see where you’re overspending, what’s tax-deductible, or how costs compare to budget. Everything gets coded to one bucket and the reports tell you nothing.

Every transaction needs a specific category from your Chart of Accounts: rent, wages, marketing, vehicle expenses, subscriptions. Takes a few seconds per transaction. Saves hours at year end and gives you P&L data you can actually use.

4. Leaving tax to the last minute

The ATO isn’t flexible on due dates. Penalties for late BAS lodgements start at $313 for small businesses and increase from there. PAYG instalments, quarterly BAS, income tax — the obligations stack up throughout the year and they all have hard deadlines.

Set aside a percentage of every payment received specifically for tax. A lot of small businesses work on 25–30% of net revenue into a separate account, adjusted once the actual tax position is clear. Talk to your accountant about what suits your situation. If you’re registered for GST, track the GST component of every sale and purchase separately. That portion was never yours to spend.

5. Trying to manage it all yourself

At some point, doing your own books costs more than it saves. Your time has a dollar value. If you’re spending four hours a month on reconciliations that a professional bookkeeper could clear in one, the maths doesn’t work in your favour.

Bookkeeping and accounting aren’t the same job. A bookkeeper handles the daily and weekly work: transaction coding, bank reconciliations, accounts payable and receivable, keeping records clean and current. An accountant handles tax planning, compliance, financial reporting, and the advice that actually shapes business decisions. Both are needed. One doesn’t cover the other.

If your books are behind, your BAS is stressful, or the numbers coming out of your software don’t feel reliable, that’s worth acting on. Good bookkeeping costs less than most business owners expect, and it gives back time that can go toward the parts of the business you’re actually good at.

Stop spending Sundays on your books

Most of the businesses we work with came to us after the DIY approach stopped working. The books fell behind, tax time became a scramble, and the cost in time and stress outweighed whatever they thought they were saving.

Outback Accounting works with Sydney small businesses on bookkeeping, BAS lodgements, and financial management that stays current rather than catching up.

What that looks like in practice:

• BAS lodged on time every quarter, without you chasing paperwork the week it’s due
• Books reconciled and current, so your reports reflect what’s actually happening in the business
• Your tax position is clear before EOFY, not something you find out about in a letter from the ATO
• When you need to make a call on hiring, pricing, or spending, there are numbers behind it.
  
  

Get in touch to talk through what your business needs.