Why Lodging Your Own Tax Return Could Be Costing You More Than You Think
By The Aussie Accounting Team | Accounting Services Australia | Individual Tax Return Specialists
Key Takeways
- Lodging your own tax return using myTax ATO may seem simple, but it often leads to missed deductions and lower refunds.
- Most Australians underclaim key expenses such as home office costs, car expenses, self-education, and income protection insurance.
- A registered tax agent in Australia typically identifies significantly more deductions than DIY filers, often increasing refunds by hundreds or even thousands of dollars.
- DIY tax returns increase the risk of ATO errors, audits, and compliance issues, especially for people with investments, rental properties, or side income.
- Professional accounting services Australia not only maximise refunds but also provide compliance protection and expert tax planning.
- Tax agent fees are 100% tax-deductible, reducing the real cost of professional help.
- If your financial situation includes anything beyond a simple salary, using a tax agent is usually more cost-effective than lodging yourself.
Every year, millions of Australians open myTax, spend an hour clicking through pre-filled fields, and lodge their return feeling quietly satisfied — until they compare refunds with a colleague who used a registered tax agent and walked away with hundreds, sometimes thousands, of dollars more.
The ATO’s myTax platform is a genuine convenience for simple returns. But convenience and optimisation are not the same thing. The cold reality is that lodging your own tax return costs the average Australian taxpayer significantly more than professional accounting fees — through missed deductions, incorrect claims, and avoidable compliance errors that can trigger ATO reviews years down the track.
In this guide, the team at The Aussie Accounting — delivering accounting services across Australia — breaks down exactly why DIY tax returns leave money on the table, what the data says, and when it’s time to hand your return to a professional.
- The Numbers Behind DIY Tax in Australia
14.1 million — individual tax returns lodged in Australia in 2022–23 (ATO). 74% of Australians used a registered tax agent or accountant in 2022–23 (ATO Tax Statistics). Average refund via tax agent: $3,550 vs. average self-lodged refund: $2,576 — a difference of nearly $1,000 (ATO comparative data, 2023). The average tax agent fee for an individual return in Australia: $150–$350 — fully tax-deductible the following year.
The Hidden Cost of 'Free' Tax Lodgement
myTax is free to use. But free doesn’t mean cost-effective. The real cost of a DIY tax return isn’t the software — it’s the deductions you don’t know to claim, the income you misreport, and the compliance risk you carry without realising it.
The ATO pre-fills your return with data from employers, banks, and government agencies — but pre-filled does not mean complete. It does not know about your home office setup, your work-related car trips, your union fees, your income protection insurance premiums, your tools, or the professional development course you paid for in July. Claiming these correctly is the difference between an average refund and the maximum refund you are legally entitled to.
| What myTax Pre-Fills | What myTax Does NOT Know |
|---|---|
| Salary and wages from your employer | Home office expenses (actual cost or fixed rate method) |
| Bank interest earned | Work-related car trips and logbook claims |
| Government payments (Centrelink, etc.) | Union fees, professional memberships |
| Private health insurance details | Tools, equipment, PPE purchased for work |
| HECS/HELP debt balance | Income protection insurance premiums |
| Dividend income (some) | Self-education expenses related to current employment |
| Share disposals (some) | Rental property deductions (interest, repairs, depreciation) |
| ATO-matched bank data | Charitable donations to DGR-registered charities |
Every item in that right-hand column represents a genuine, legal deduction the ATO allows — and every item that goes unclaimed inflates your tax bill unnecessarily.
- Key Insight
The ATO does not tell you what deductions you are entitled to. It is your responsibility — or your tax agent’s — to identify and claim them correctly. A registered tax agent’s job is to know what you can claim. A DIY filer’s job is simply to fill in what they know about.
The Most Commonly Missed Deductions in Australia
According to the ATO’s own compliance data and tax agent industry research, these are the deductions most frequently under-claimed by self-lodgers:
- Work-related car expenses:
The ATO permits two methods — the cents-per-kilometre method (88 cents/km in 2024–25, up to 5,000km) or the logbook method, which captures actual vehicle costs proportionate to business use. Most self-lodgers use the cents-per-km method but undercount their kilometres significantly.
- Home office expenses:
From 1 July 2022, the ATO revised the fixed rate method to 67 cents per hour for all additional running costs (electricity, internet, stationery). The actual cost method can yield a larger claim for home-based workers but requires detailed records. Fewer than 40% of eligible self-lodgers use the optimal method for their situation.
- Rental property deductions:
Depreciation on depreciating assets (appliances, carpet, hot water systems) via a Quantity Surveyor’s report is one of the most powerful rental property deductions available — and one of the least claimed by self-managing landlords. Interest on investment loans, land tax, property management fees, and a proportion of council rates are also fully deductible.
- Self-education expenses:
Courses, textbooks, stationery, and even a portion of your internet costs are deductible if the education relates directly to your current employment. The common mistake: claiming courses for a career change rather than current role enhancement, which the ATO disallows.
- Income protection insurance premiums:
Premiums on income protection policies held outside of superannuation are fully tax-deductible. Many salary-earners hold these policies and have no idea they can claim them.
- Charitable donations:
Donations of $2 or more to ATO-registered Deductible Gift Recipients (DGRs) are fully deductible. Self-lodgers frequently forget to collate these, particularly smaller recurring donations via workplace giving schemes.
- The Deduction Gap Is Real
A 2023 analysis of ATO tax statistics found the average tax agent-lodged return claims 34% more in work-related deductions than a self-lodged return for comparable income levels. On a $90,000 salary, that gap can represent $800–$1,400 in additional refund — well above the cost of professional accounting services in Australia.
The Compliance Risk You Might Not See Coming
Missing deductions costs you money immediately. But incorrect claims — even unintentional ones — can cost you far more over time through ATO audits, interest charges, and administrative penalties.
The ATO uses sophisticated data matching to cross-reference what you report against third-party data from employers, banks, share registries, private health funds, property data, and even overseas tax authorities. If your return contains inconsistencies, you may receive a review notice — sometimes years after the original lodgement.
| ATO Risk Area | Self-Lodger Risk | Agent-Lodger Protection |
|---|---|---|
| Work-related expense claims | High — no professional review | Agent verifies records before lodging |
| Rental property deductions | High — frequent errors | Agent reconciles income & expenses |
| Capital gains (shares/property) | Medium-High complexity | Correct CGT calculation applied |
| Foreign income disclosure | High — often missed | Full income review included |
| Side income (gig economy) | High — often omitted | Correct classification applied |
| Crypto assets | Very High — misunderstood | ATO CGT rules applied correctly |
Importantly, registered tax agents are legally liable for the professional advice they give you. If they make an error, they carry professional indemnity insurance. If you make an error lodging your own return, you bear the full financial and legal consequences — including general interest charges (currently 11.38% p.a.) on any tax shortfall.
A properly structured cash flow statement breaks your business’s cash movements into three distinct categories, each telling a different part of the financial story:
- Agent Lodgement Deadline Advantage
One often-overlooked benefit of using a registered tax agent: extended lodgement deadlines. While self-lodgers must submit by 31 October, clients of registered tax agents typically have until 15 May of the following year — giving you months of additional cash flow before any tax owing is due.
When a DIY Return Is Fine — And When It Absolutely Is Not
To be fair: for some Australians, myTax is entirely appropriate. If your financial life is genuinely simple, a DIY return may be perfectly sufficient. But for most working Australians — especially those with any complexity in their finances — the cost-benefit calculation strongly favours professional accounting services in Australia.
| Your Situation | DIY Suitable? | Professional Advice Recommended? |
|---|---|---|
| One employer, no investments | Yes | No |
| Work expenses over $300 | Caution | Yes |
| Rental property | No | Yes |
| Shares/crypto sold | No | Yes |
| Sole trader income | No | Yes |
| Foreign income | No | Yes |
| Multiple income streams | No | Yes |
| Previous ATO review | No | Yes |
- Rule of Thumb
If your tax return involves anything beyond a single salary, standard bank interest, and a private health insurance rebate — you almost certainly have unclaimed entitlements that a registered tax agent will find. The fee pays for itself in the first return.
What Professional Accounting Services in Australia Actually Cost — And Return
The most common objection to using a registered tax agent is cost. It’s worth examining this objectively:
| Return Complexity | Agent Fee (AUD) | Extra Refund vs DIY | Net Benefit |
|---|---|---|---|
| Simple | $150–$220 | $400–$700 | Positive |
| Moderate | $220–$350 | $800–$1,500 | Strong Positive |
| Complex | $350–$700 | $1,500–$4,000+ | Very Strong |
| Business/Sole Trader | $500–$1,200 | $2,000–$6,000+ | Excellent ROI |
And critically: the tax agent fee you pay this year is a deduction on next year’s return. So if you pay $300 for accounting services in Australia, that amount reduces your taxable income next year — meaning part of the fee is effectively subsidised by the ATO.
- Proudly Serving Australians Nationwide
The Aussie Accounting provides individual tax return services and professional accounting services across Australia — Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart, Darwin, Canberra, and all regional areas. Our fully digital process means you can engage us from anywhere in Australia with zero paperwork hassle.
Frequently Asked Questions (FAQ)
No. Every Australian has the right to lodge their own tax return using the ATO’s myTax platform. However, using a registered tax agent is strongly recommended for anyone with investment income, rental properties, self-employment income, capital gains, or multiple deduction types — as the financial benefit routinely exceeds the cost.
Fees vary based on complexity. For a straightforward individual return, most registered tax agents in Australia charge between $150 and $350. More complex returns involving rental properties, share portfolios, or business income typically range from $350 to $700 or more. Importantly, this fee is fully tax-deductible in the following financial year.
For self-lodgers using myTax, the deadline is 31 October 2025. For taxpayers who engage a registered tax agent before 31 October 2025, lodgement can typically be extended to 15 May 2026 — providing an additional six months before any tax owing must be paid.
Yes. The ATO conducts random reviews and data-matching audits on self-lodged and agent-lodged returns alike. However, self-lodged returns statistically carry a higher audit risk due to common errors in work-related expense claims, rental income reporting, and capital gains treatment. If audited, a registered tax agent can represent you — self-lodgers must handle ATO correspondence themselves.
The most frequently missed deductions in self-lodged Australian returns include: home office running costs (correct method), work-related car expenses (logbook vs. cents-per-km), income protection insurance premiums, self-education expenses, professional membership and union fees, charitable donations to DGR organisations, and rental property depreciation via a quantity surveyor’s report.
All registered tax agents in Australia must hold a current registration with the Tax Practitioners Board (TPB) and display their registration number. You can verify any agent’s registration at tpb.gov.au. The Aussie Accounting is a registered tax agent delivering individual and business accounting services across Australia — visit theaussieaccounting.com.au to get started.
Yes — absolutely. Fees paid to a registered tax agent for the preparation and lodgement of your individual tax return are fully deductible under Section 8-1 of the Income Tax Assessment Act 1997. You claim this deduction in the financial year in which the fee is paid, not the year the return relates to.
The Bottom Line: What Is Your DIY Return Really Costing You?
Lodging your own tax return feels like a smart, cost-saving decision. But for the majority of Australian taxpayers — anyone with work-related expenses, investments, a rental property, side income, or any financial complexity — DIY lodgement is one of the most expensive financial habits you can maintain.
The data is consistent and unambiguous: Australians who use professional accounting services in Australia receive materially larger refunds, carry materially lower compliance risk, and benefit from deadline extensions that improve their cash flow. The fee is modest. The return is substantial. And next year, you can claim the fee back.
At The Aussie Accounting, we make engaging a registered tax agent as simple as logging into myTax — but with the expertise, accountability, and refund-maximisation that only a qualified professional can deliver.
- Get Your Maximum Refund This Year
Contact The Aussie Accounting today at theaussieaccounting.com.au. We offer individual tax return services, business tax advice, and comprehensive accounting services across Australia — fully online, fast turnaround, and transparent fees. Let us find what you have been leaving behind.