Work-Related Expense Substantiation in Australia 2026: ATO Rules, the $300 Threshold, and How a Tax Agent Can Help

Work-related expense deductions are one of the most common areas of ATO scrutiny for Australian individual taxpayers. In 2026, the ATO continues to focus on claims that appear inflated, lack proper documentation, or include expenses that are private in nature. Understanding the substantiation rules — and how a registered tax agent can help you claim every legitimate deduction while staying compliant — is essential for anyone lodging a tax return this year.

Understanding Work-Related Expense Substantiation in Australia

To claim a work-related expense deduction, the ATO requires that three conditions are met. First, you must have personally incurred the expense and not been reimbursed by your employer. Second, the expense must be directly related to earning your assessable income — it cannot be private or capital in nature. Third, you must be able to substantiate the claim with appropriate records.

These are sometimes called the "three golden rules" of work-related expense deductions. All three must be satisfied for a deduction to be valid. Meeting two out of three is not sufficient — the ATO can and does disallow claims that fail any one of these tests.

The substantiation rules are set out in Division 900 of the Income Tax Assessment Act 1997. They specify what types of records are required, how long records must be kept, and what exceptions apply for small amounts. A registered tax agent can help you understand which rules apply to your specific circumstances and ensure your records are adequate before you lodge.

Written Evidence Requirements: What the ATO Accepts

For most work-related expenses, written evidence is required. The ATO specifies that a valid written evidence document must be in English (unless the expense was incurred outside Australia) and must clearly show the name of the supplier, the amount paid, the nature of the goods or services, and the date the expense was incurred.

Bank or credit card statements alone are generally not sufficient because they typically do not describe the nature of the goods or services purchased. Digital records, including clear photographs of receipts stored in a compliant record-keeping app, are accepted by the ATO. The key is that the record must contain all the required information.

If a receipt does not describe the nature of the goods or services, you may add a description to the document before lodging your return. However, you cannot alter the amount or other details. A tax agent can advise you on how to annotate incomplete records correctly.

Key Thresholds and Exceptions You Must Know

The substantiation rules include several important thresholds and exceptions that affect how you record and claim work-related expenses.

• The $300 rule — If your total work-related expense claims are $300 or less, you are not required to provide written evidence. However, you must still be able to explain how you calculated the claim and demonstrate that it is reasonable. This exception does not apply to car expenses, meal allowances, or travel allowance expenses, which have their own specific substantiation requirements.
• Laundry expenses up to $150 — Laundry claims of $150 or less (excluding dry-cleaning) do not require written evidence, but you must keep a record of how the amount was calculated. The ATO accepts $1 per load for work-only loads or 50 cents per load for mixed loads as a reasonable basis for calculation.
• Small expenses of $10 or less — For individual expenses of $10 or less, you may record the details in a diary or compliant app rather than keeping a receipt. The annual total for expenses recorded this way is capped at $200.
• Travel diaries — If your work-related travel involves six or more consecutive nights away from home, you must keep a travel diary recording the nature of each activity, the date and place, and the duration of each activity.
• Car expense methods — Car expenses can be claimed using either the cents per kilometre method (88 cents per kilometre for 2025-26, up to 5,000 kilometres) or the logbook method. The logbook method requires a logbook kept for a continuous 12-week period that records the odometer readings and purpose of each trip.

Working From Home Deductions: The 2025-26 Rules

Working from home deductions remain a significant area of ATO focus in 2026. The ATO offers two methods for calculating working from home expenses for the 2025-26 income year.

The fixed rate method allows a deduction of 70 cents per hour for each hour worked from home. This rate covers electricity and gas, internet, phone, and computer consumables. To use this method, you must keep a record of the actual hours you worked from home — estimates are not accepted. A timesheet, roster, diary, or similar record is required.

The actual cost method allows you to claim the actual work-related portion of each expense. This method requires more detailed record-keeping but may produce a larger deduction for some taxpayers, particularly those with high home office running costs. You must be able to apportion each expense between work and private use based on a reasonable method.

A registered tax agent can help you determine which method produces the best outcome for your circumstances and ensure your records are sufficient to support the claim.

Common Mistakes That Trigger ATO Scrutiny

The ATO uses data matching and benchmarking to identify tax returns with work-related expense claims that appear inconsistent with the taxpayer's occupation, income level, or industry. The following mistakes are among the most common triggers for ATO review.

• Claiming commuting costs — Travel between your home and your regular workplace is private travel and is not deductible, regardless of the distance, the time of day, or whether you are required to work overtime. This is one of the most frequently disallowed deductions.
• Claiming the full cost of items used for both work and private purposes — If you use a laptop, phone, or other item for both work and personal purposes, only the work-related proportion is deductible. You must apportion the expense based on actual use, not an estimate.
• Claiming clothing that is not a uniform or protective gear — Conventional clothing that could be worn outside work — even if you only wear it to work — is not deductible. Only registered uniforms, occupation-specific clothing, and protective gear qualify.
• Claiming self-education expenses that are not directly related to your current role — Self-education expenses are deductible only if the course or study is directly related to your current employment and is likely to result in an increase in your income from that employment. Study for a new career is generally not deductible.
• Not keeping records for the required five-year period — Records must generally be kept for five years from the date your tax return is lodged. If a dispute with the ATO arises, records must be kept until the dispute is resolved, even if this exceeds five years.

Australian Regulatory Context: ATO, TPB, and the Tax Practitioners Board

The ATO administers the substantiation rules and has broad powers to request records, issue amended assessments, and apply penalties for incorrect claims. Penalties for making a false or misleading statement in a tax return can range from 25 per cent to 75 per cent of the shortfall amount, depending on whether the behaviour was careless, reckless, or intentional.

Registered tax agents are regulated by the Tax Practitioners Board (TPB) under the Tax Agent Services Act 2009. To be registered, a tax agent must meet minimum education and experience requirements and comply with the Code of Professional Conduct. The Code requires tax agents to act honestly and with integrity, to maintain competence, and to act in the best interests of their clients.

Using a registered tax agent provides important protections. If you provide your tax agent with complete and accurate information and they make an error, the ATO may remit penalties and interest that would otherwise apply. This protection does not apply if you provide false or misleading information to your agent.

The ATO publishes occupation-specific guides for work-related expenses, covering industries including teachers, nurses, police officers, construction workers, and many others. These guides set out what expenses are typically deductible for each occupation and what records are required. A tax agent familiar with your industry can help you identify deductions you may have overlooked.

Questions to Ask a Registered Tax Agent About Work-Related Expenses

When engaging a registered tax agent to help with your work-related expense claims, consider asking the following questions.

1. Are my current record-keeping practices sufficient to support my work-related expense claims if the ATO requests evidence?
2. Am I using the most advantageous method for calculating my working from home deductions?
3. Are there any occupation-specific deductions I may be entitled to that I have not been claiming?
4. How should I apportion expenses that are used for both work and private purposes?
5. What records do I need to keep for my car expenses, and which method — cents per kilometre or logbook — is likely to produce the better outcome for my situation?
6. If I receive an ATO review or audit notice, what is the process and how can you assist me?

How MyMoney® Can Help You Find a Registered Tax Agent

Getting your work-related expense deductions right requires both knowledge of the substantiation rules and an understanding of what is deductible in your specific occupation. A registered tax agent can review your records, identify legitimate deductions you may have missed, and ensure your return is lodged correctly and on time.

MyMoney® connects Australians with registered tax agents who specialise in individual tax returns, work-related expense claims, and ATO compliance. Whether you are lodging for the first time, reviewing a previous return, or responding to an ATO query, our marketplace makes it easy to find the right professional.

Post a Brief to describe your tax situation and receive proposals from registered tax agents. Or Browse Tax Agents on the MyMoney® Marketplace to find a specialist in your area today.