What Is a Sole Trader Tax Return

What a sole trader tax return includes

For sole traders, the annual income tax return is an Individual Tax Return (ITR) that includes the Business and Professional Items schedule. In that schedule you:

• Report business income earned under your ABN (sales, fees, other income).
• Claim deductible business expenses (e.g. software, tools, subscriptions, advertising, insurance, accounting and bank fees).
• Apply any small business concessions you are eligible for (e.g. simplified depreciation). Thresholds and eligibility change, so confirm current rules before you claim.
• Account for private use adjustments where necessary (e.g. home internet or motor vehicle apportionment).
• Include PAYG instalments already paid during the year so they offset your final tax.

If you employ staff, payroll obligations (STP, PAYGW and super) are handled during the year and do not replace your annual income tax return. If you are registered for GST, you will also lodge BAS monthly or quarterly to report GST collected and credits.

Key dates, registrations and links to BAS

• Lodgement due date: Generally 31 October if you lodge yourself. If you use a registered tax agent and are on their client list by the ATO cut‑off, later dates may apply.
• GST registration: Register if your GST turnover meets or is expected to meet the ATO threshold. Registered businesses must lodge BAS (monthly, quarterly or annually as allowed).
• PAYG instalments: The ATO may require quarterly instalments toward your annual tax; these appear on BAS or separate notices.
• Record keeping: Keep supporting evidence for at least five years, including invoices, bank statements, asset purchase documents and working papers for apportionment.

Unsure whether you need GST or PAYG instalments? Compare BAS agent services and tax accountant support to set the correct registrations and cycle.

What you need to lodge a sole trader tax return

• TFN, ABN and business details.
• Accounting file or bank statements covering the year.
• Sales records and tax invoices for expenses.
• Vehicle records (logbook or kilometres method documentation) if claiming car expenses.
• Home‑based business calculations (floor area or actual use method and power/internet apportionment notes).
• Asset purchases and finance agreements for depreciation and interest.
• PAYG instalment and BAS summaries (if applicable).
• Private health and super contribution statements where relevant.

Well‑organised bookkeeping makes this easy. See Best Bookkeeping Approach for Sole Traders and Best Way to Organise Tax Records.

Common deductions and mistakes for sole traders

Frequent errors include double‑claiming GST‑inclusive expenses when also claiming GST credits on BAS, claiming 100% of mixed‑use costs, ignoring PAYG instalments at year‑end, or missing super deductions due to incorrect notices of intent.

How to lodge: options and fit

• myTax: Suits simple sole traders with clean records who are comfortable preparing the business schedule.
• Registered tax agent: Best for growing businesses, multiple income streams, GST/BAS interactions, asset purchases, or where you want lodgement extensions and proactive advice.
• Software + bookkeeper + tax agent: A robust stack for ongoing accuracy and faster year‑end—see bookkeeping services and tax support.

If you also need payroll help or are hiring, consider payroll services. For broader guidance, see the small business accountant hub.

Costs and scope: what affects the price

• Complexity: Number of accounts, mixed GST treatment, assets/finance, and whether payroll is involved.
• Record quality: Well‑reconciled books cost less to finalise than manual or incomplete records.
• Advice needed: Compliance‑only work costs less than work that includes strategic tax planning and structure guidance.
• Timing: Urgent lodgements or catch‑ups may attract priority fees.

If your records need cleanup first, it can be faster and cheaper to book a tidy‑up before tax preparation. Compare bookkeeping and tax options to set the right order of work.

Best next steps

Confirm whether you need GST/BAS, check your bookkeeping is up to date, pull your source records together, then decide if you will self‑lodge or use a registered tax agent. If you’re unsure, a short scoping call can save time and reduce errors.

Use the related pages below to move into the most relevant subtopic, comparison page or service page, then make contact with a clear brief.