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Do I Need a Tax Agent as a Sole Trader in Australia?

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The short answer for sole traders

If you trade under your own ABN — as a contractor, freelancer, gig-economy driver, consultant, or any business structure that flows income to your individual tax return — the answer is "almost certainly yes" for most sole traders. Here's why.

Sole-trader returns include a Business and Professional Items schedule that myTax does not pre-fill for you. You're declaring gross business income, then claiming the business deductions against it. The ATO scrutinises this schedule more heavily than salaried-employee deductions, and the rules for what's deductible vs personal use are nuanced.

A standard Registered Tax Agent fee for a sole-trader return is AU$300–600+ at traditional accountants. a registered tax agent (see the directory)


What makes a sole-trader return harder than a salaried return

1. The Business schedule itself

myTax has a Business schedule but the ATO assumes you understand:

  • Cash basis vs accruals basis accounting (most sole traders use cash; some have to use accruals)
  • GST registration threshold ($75,000 turnover) and what to do if you crossed it mid-year
  • Trading stock on hand at 30 June (if you sell physical goods)
  • PSI (Personal Services Income) rules — if more than 80% of income is from one source, PSI rules may push deductions back into your personal income
  • Apportionment of mixed personal / business expenses (phone, internet, vehicle, home office)

2. Mixed personal-business expenses

Almost every sole-trader expense has a personal component. The ATO expects you to:

  • Keep a diary or log for vehicle use (logbook method) or claim cents-per-km up to 5,000 km
  • Apportion home-office costs by floor area used for business
  • Apportion phone and internet by work-use percentage with evidence
  • Track depreciation schedules for assets >$300

Mis-apportioning is the most common cause of ATO follow-up letters for sole traders.

3. Specific high-risk areas the ATO targets

The ATO publishes annual focus areas. For sole traders the recurring high-scrutiny items are:

  • Vehicle expenses — especially when claimed without a logbook
  • Home office / business use of home — especially full electricity / depreciation claims
  • Travel between business locations — vs home-to-work (which isn't deductible)
  • Capital purchase vs immediate deduction — instant asset write-off thresholds change yearly
  • Entertainment / meal expenses — generally NOT deductible despite common myth

A Registered Tax Agent identifies these traps proactively.

4. PSI rules — the trap that catches contractors

If 80%+ of your income comes from one client (common for IT contractors, design freelancers, consultants), you may fall under Personal Services Income (PSI) rules. PSI restricts:

  • Deductions for home office, motor vehicle to/from home, payments to spouse
  • Ability to split income with a family member via a trust

Whether PSI applies depends on the results test, unrelated clients test, employment test, and business premises test. Getting this wrong is a common audit trigger. A Registered Tax Agent runs through the tests for you.


When DIY via myTax might still be enough

Some sole traders have very simple returns that fit comfortably in myTax:

  • Income from one consistent activity (e.g., Uber driving only, freelance writing only)
  • Under $50k gross income (not GST-registered)
  • No home office or vehicle apportionment (or only cents-per-km up to 5,000 km)
  • No depreciating assets above $300
  • All income from clients who issue you proper invoices/RCTIs

For this profile, the myTax Business schedule is workable in a couple of hours.


The realistic financial breakeven

Need a professional? Browse every TPB-registered tax agent near you in the AusTax directory, or post a request and matching practices will contact you — free.

For the cost to be "worth it" purely on tax outcome, the agent needs to find an extra deduction of:

  • $1,200+ (at 32% marginal rate, returns $384 — covers a $400 traditional accountant fee)

For most sole traders, this threshold is crossed easily on one of:

  • Properly apportioned home office costs (often $1,000+ deduction missed in DIY)
  • Logbook-method vehicle deductions (often higher than cents-per-km cap)
  • Forgotten subscriptions / software / cloud-tools deductions
  • Correct depreciation schedule for laptops / phones / equipment

So the breakeven analysis favours Agent assistance for most sole traders. Add the time saved (4–8 hours of myTax Business schedule work) and audit risk reduction, and the case is strong.


Need a professional?

Through partnerships with TPB Registered Tax Agents:

  • Upload your gross income records and any expense receipts
  • AI organises expenses by category and flags likely deductions
  • A TPB Registered Tax Agent partner reviews everything (typically 24–72 hours)
  • The agent applies the PSI tests, apportions mixed expenses correctly, identifies missed deductions, and lodges with the ATO
  • a registered tax agent (see the directory) The fixed-price covers standard individual sole-trader returns.

    If you want to compare paths before committing, see the full decision guide.


    The 4 questions to answer right now

  • Did your gross business income exceed $75,000? → GST registration check needed
  • Is more than 80% of your income from one client? → PSI tests likely apply
  • Do you use your home / vehicle / phone for business? → Apportionment required
  • Did you buy any equipment over $300? → Instant write-off vs depreciation choice required
  • Need a professional? Browse every TPB-registered tax agent near you in the AusTax directory, or post a request and matching practices will contact you — free.

    AI analysis on this page is general information only, not tax advice. Specific PSI / GST / business-deduction questions benefit from review by a Registered Tax Agent who can examine your circumstances.


    Need Help With Your Tax Return?

    Complex situation? a registered tax agent (see the directory) Our partner agents review every detail for accuracy and compliance.

    *Disclaimer: This is general information only and does not constitute personal tax advice. Consult a registered tax agent for advice tailored to your specific situation. Always verify against the latest ATO guidelines at ato.gov.au.*

    Need a professional?

    Find a registered tax agent near you

    • • Every TPB-registered practice in Australia, by suburb
    • • Post what you need — matching practices contact you
    • • Free, and your details stay private

    AusTax is a directory, not a tax agent. A listing is not an endorsement.

    Authoritative sources

    All tax rules and figures cited above are sourced from the Australian Taxation Office (ATO).

    Frequently Asked Questions

    Do sole traders need a tax agent in Australia?

    Most sole traders benefit from Registered Tax Agent assistance because the Business and Professional Items schedule, PSI rules, and mixed personal-business expense apportionment are nuanced and often misfiled in DIY myTax. Cost-benefit usually favours agent assistance once total deductions are claimed correctly.

    What are PSI rules and how do they affect contractors?

    Personal Services Income (PSI) rules apply when 80%+ of your income comes from one client. They restrict deductions for home office, vehicle from home, and payments to spouses. Whether PSI applies depends on the results test, unrelated clients test, employment test, and business premises test.

    How much does a tax agent cost for a sole trader return?

    Traditional accountants charge AU$300–600+ for sole trader returns. AusTax AI's Complete Tax Service is AU$129 one-off (inc GST) through partnerships with TPB Registered Tax Agents — substantially below traditional accountant rates.

    Can I self-lodge a sole trader return via myTax?

    Yes if your situation is simple: single activity, under $50k gross, no home/vehicle apportionment, no depreciating assets above $300, all income from clients with proper invoices. Above that complexity threshold, agent assistance typically pays for itself in correctly applied deductions.

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