Many taxpayers overlook legitimate tax deductions Australia allows each year, not because they are dishonest or careless, but because the full scope of what the ATO accepts as deductible is genuinely broader than most people realise. Work expenses, investment costs, education, donations, and insurance premiums all belong on the return when the conditions are met. At Tax NextGen, our Chartered Accountants work through returns from everyday Australians throughout the year, and the same legitimate claims get left off, year after year.
This guide breaks down every major deduction category the ATO currently accepts, with real examples, calculation methods, and the record-keeping rules you need to back each claim. By the end, you will know exactly what you can claim, how to apportion mixed-use costs correctly, and what to avoid so your return does not attract unwanted attention.
What the ATO accepts as work-related deductions
Before claiming anything, every expense must pass the ATO’s three-part test: you spent the money yourself, you were not reimbursed by your employer, and the expense directly relates to earning your assessable income. That filter applies to every category below. If an expense fails even one condition, it comes off the return.
Car and travel expenses, common tax deductions Australia allows
Work-related travel is deductible; ordinary commuting is not. The distinction matters. Driving from home to your regular workplace and back is a private journey. Travelling between worksites, visiting clients, attending off-site meetings, or transporting bulky equipment that cannot reasonably be stored at your workplace, those trips are deductible. A nurse driving between two hospitals has a legitimate car claim, as does a plumber travelling from the depot to a client’s property.
The ATO allows two calculation methods. The cents-per-kilometre method covers up to 5,000 work kilometres. Note that the rate changes each income year, for 2025, 26 it was 88 cents per kilometre, and the ATO publishes the updated rate for each new year at ato.gov.au; no logbook is required, but you need records showing why each trip was work-related. The logbook method uses your actual running costs multiplied by your business-use percentage, established through a continuous 12-week logbook recording every trip, odometer readings, and the purpose of each journey. A valid logbook holds for five years unless your driving pattern changes significantly.
Home office running costs
You can claim the work-related portion of electricity, gas, internet, phone, stationery, and the decline in value of office equipment used while working from home. The operative word is “portion.” The full household electricity bill is not deductible; only the additional cost attributable to your work activity is. The ATO currently provides two methods for calculating this, covered in detail in the apportionment section below.
Tools, equipment, and work clothing
Items costing $300 or less that you use exclusively for work can be claimed as an immediate deduction in the year of purchase. Items above that threshold are claimed over time through depreciation based on the asset’s effective life. A $900 laptop used 60% for work, for example, cannot be claimed in full upfront; you claim 60% of its decline in value each year.
Protective clothing, hard hats, safety glasses, steel-cap boots, and sunscreen used in an outdoor occupation are all deductible. Occupation-specific uniforms and compulsory uniforms with a registered logo are deductible. Plain clothing worn to work, even when an employer requires it, is not. The ATO is consistent on this point, and it is one of the most common areas where claims are incorrectly made.
Tax deductions Australia recognises for investment, education, and other expenses
Deductions extend well beyond a regular salary situation. The ATO allows claims wherever expenses are incurred in earning assessable income. Some categories, including gifts and donations to deductible gift recipients, income protection insurance premiums, personal superannuation contributions (with a valid notice of intent), and tax agent fees, apply under specific rules rather than the standard income-connection test.
Deductions linked to investment income
Interest on money borrowed to purchase income-producing assets (shares, managed funds, or similar investments) is deductible. So are account-keeping fees on investment accounts, management fees, certain financial advice costs related to your existing investment mix, and specialist investment journals or subscriptions. If an expense has a private and investment component, only the investment portion counts. These claims sit separately from rental property deductions, which have their own ATO schedules and rules.
Self-education expenses
The ATO applies a connection test: the course must relate to your current job, not a future career. An accountant completing a tax specialisation passes the test, as does a nurse completing a postgraduate clinical unit while working in that clinical area. Deductible self-education costs include course fees, textbooks, stationery, and travel to attend classes. Since 1 July 2022, the old $250 reduction no longer applies, meaning every dollar of eligible self-education expenses counts.
Other deductions people overlook
Several entirely legitimate deductions rarely make it onto a return. Charitable donations of $2 or more to a registered deductible gift recipient are deductible in full with a receipt. Income protection insurance premiums, where the policy is held outside superannuation and premiums are paid from your own funds, are deductible. Fees paid to a registered tax agent to prepare and lodge your return are deductible in the following income year. Personal superannuation contributions where you have lodged a valid notice of intent with your fund are also claimable under specific conditions.
The tax deductions Australia workers most commonly miss
This is where legitimate money gets left behind. These deductions are entirely within ATO rules but get skipped because people either do not know about them or have not kept the evidence to support the claim.
Phone and internet, calculating the work-use percentage
You cannot claim the full bill, but you can claim the work-related portion. The ATO’s accepted approach is a representative usage diary kept over four weeks, which establishes the percentage of calls and data used for work. That percentage is then applied to the full annual cost. As a practical example: an $80 monthly bill with a 25% work-use split produces a $240 annual deduction. That figure is real, it is legitimate, and it gets missed constantly.
Depreciation on assets over $300
The $300 instant write-off gets all the attention, but items above that threshold are still claimable, just spread across the asset’s effective life. A $900 laptop used 60% for work is claimed at 60% of the annual depreciation, not written off in one hit and not ignored altogether. The ATO expects a purchase receipt, your work-use percentage, and your calculation of effective life. Keep all three.
Professional memberships, union fees, and subscriptions
Annual union fees, professional association memberships, and work-related trade journals or online subscriptions are straightforward deductions that get skipped with surprising frequency. A teacher’s professional body membership, a registered nurse’s annual registration fee, and an engineer’s institute subscription are all generally deductible in full where they relate directly to the job. If the fee is work-related and you have the receipt, it belongs on the return.
How to correctly apportion mixed-use costs
Any expense with both a private and work-related component can only be claimed for the work-related share. The ATO expects the apportionment method to be fair, reasonable, and documented. “I estimated about half” is not documentation.
The two working-from-home calculation methods
The fixed-rate method is straightforward: multiply the total hours worked from home by the applicable rate per hour (70 cents under the current revised fixed-rate method). If you worked from home 1,152 hours during the year, the deduction is $806.40. That rate covers electricity, gas, internet, phone, stationery, and consumables. You need a record of the actual hours worked, not an estimate.
The actual-cost method requires you to calculate each additional running expense individually and apply your work-use percentage. If annual electricity, internet, and stationery costs total $1,200 and 40% of that use is work-related, the deduction is $480. This method suits people with high running costs or expensive home office equipment, but it requires more detailed records. Choose the method that reflects your genuine situation, not simply the one that produces a bigger number.
Splitting phone, internet, and vehicle costs
For phone and internet, the four-week usage diary establishes the work percentage, which is then applied to the full-year cost. For vehicles under the logbook method, the 12-week logbook records every trip with odometer readings and business purpose, producing a business-use percentage applied to actual running costs. Under the cents-per-kilometre method, no logbook is required, but you do need records showing each journey was work-related, up to the 5,000-kilometre cap.
What the ATO won’t allow, and why claims get rejected
Understanding what is not deductible is just as important as knowing what is. Certain categories consistently appear on the ATO’s disallowance list, and claiming them without basis creates compliance risk.
Common private expenses mistaken for deductions
The ATO consistently identifies these as non-deductible:
- Ordinary commuting between home and a fixed workplace
- Childcare costs
- Gym memberships, unless occupationally required in very specific roles
- Regular clothing, even if worn exclusively for work
- Entertainment and client meals in most circumstances
- Traffic fines and government penalties
Each of these fails the ATO’s three-part test because they are private in nature, even when they feel work-adjacent. Feeling like an expense relates to work is not the same as the expense satisfying the ATO’s connection test.
Why the ATO flags and rejects claims
The most common rejection triggers are: no receipts or logbooks to support the claim, figures inflated beyond what the taxpayer’s circumstances reasonably support, expenses reimbursed by an employer, and claims built on tax myths rather than actual ATO rules. The ATO’s data-matching programme compares your return against employer records, bank data, and industry benchmarks for people in similar occupations earning similar incomes. An unusually large work clothing or vehicle claim from someone in a desk-based role will stand out.
Record-keeping rules, and when a tax agent earns their fee
Good records are what convert a legitimate expense into an actual deduction. Without them, even a valid claim can be disallowed if the ATO reviews your return.
What records you need and for how long
The ATO’s standard retention period is five years from the date of lodgement. Written evidence must show the supplier name, the amount paid, a description of what was purchased, the date of the transaction, and the date the document was prepared. A bank statement alone is not sufficient because it typically does not capture all of those details. By category: keep receipts and invoices for tools and equipment, a 12-week logbook for vehicle claims under the logbook method, a record of hours for home office claims, and a four-week usage diary for phone and internet apportionment.
When a registered tax agent earns their fee
Straightforward returns with a single employer and standard deductions can be self-lodged through myTax without difficulty. Situations involving investment properties, capital gains, depreciation schedules, cryptocurrency, multiple income sources, or significant work-related claims benefit from a professional review. A registered tax agent understands which deductions apply to your specific occupation, how to calculate apportionment correctly, and which records will satisfy the ATO if the return is ever reviewed. The fee is itself deductible. Tax NextGen is staffed by Chartered Accountants and CPAs who can review your full situation and make sure nothing legitimate gets left off your return. Book a call to find out what they can do for you.
Use this as your starting point
Tax deductions Australia allows span employment expenses, investment costs, self-education, donations, insurance, and more. Many taxpayers are not claiming everything they are entitled to, and the gap between what is on the return and what should be on the return comes down to awareness and records.
Use the categories in this guide as a checklist before you lodge. Match each potential claim against the ATO’s three-part test, confirm you have the supporting evidence, and calculate any mixed-use apportionment correctly. If your situation involves any complexity, depreciation, investment income, multiple employers, or deductions outside the straightforward categories, a registered tax agent review is worth the cost, particularly given the fee itself comes back as a deduction the following year.
Tax NextGen offers a free initial consultation by phone, from anywhere in Australia, with no office visit required. If you would like a Chartered Accountant to work through your tax deductions Australia entitles you to claim before you lodge, you can book a time at taxnextgen.com.au.
