A cost may belong on your Australian tax return only when it has a sufficient connection with earning assessable income, isn't private or capital unless a specific rule applies, and is supported by appropriate records. For eligible small businesses, the current instant asset write-off rules allow an immediate deduction for qualifying assets costing less than $20,000 when first used or installed ready for use between 1 July 2025 and 30 June 2026.
A sole trader is reviewing vehicle costs, home-office invoices and professional fees before lodging a return. The tempting approach is to add every work-related purchase to a tax right off list, but a deduction isn't an automatic refund. Eligibility generally depends on the income connection, private-use apportionment, timing, capital-versus-revenue treatment and evidence.
Who this article is for: individuals, employees, professionals and personal services income earners, sole traders, small businesses, property investors and not-for-profits reviewing potentially deductible costs.
Currency note: This article reflects Australian rules, thresholds and regulator guidance current as at 10/2026. Figures and time-sensitive rules should be checked against current Australian Taxation Office (ATO) guidance before you act. The ten categories below are useful prompts, not permission to claim every item. They cover work costs, education, vehicles, interest, assets, payroll, repairs, consumables, advice fees and bad debts.
Table of Contents
- 1. Work-related expenses and home office deductions
- 2. Professional development, training and education expenses
- 3. Vehicle and motor vehicle expenses
- 4. Interest on borrowed funds used to produce assessable income
- 5. Depreciation and capital allowances on business assets
- 6. Salaries, wages and employee benefits
- 7. Repairs and maintenance to premises and equipment
- 8. Office supplies, consumables and business sundries
- 9. Accounting, legal and professional advice fees
- 10. Bad debts and doubtful debts
- 10-Item Tax Deduction Comparison
- Make the evidence match the claim
- Frequently asked questions
1. Work-related expenses and home office deductions
A home-office claim stands or falls on the hours record and the method chosen, not on the fact that a spare room exists. An employee generally needs to have paid the cost themselves, connect it to their income-producing work and retain records. The deduction requirements for individuals should be checked before lodging a claim.
For eligible working-from-home hours under the fixed-rate method for 2025–26, the ATO allows 70 cents per hour for energy, internet and data, mobile and home phone, stationery and computer consumables. The ATO working-from-home guidance requires a record of total hours worked from home across the income year. An estimate is not enough.
Practical rule: Another person should be able to reproduce the claim from your timesheet, diary, invoices and calculation.
A sole trader may choose the actual-cost method, calculating the business-use share of eligible household expenses. Rent, utilities, phone and internet commonly require apportionment between private and income-producing use. Furniture and equipment may be revenue expenses in some circumstances, while other items are depreciating assets and are claimed over time rather than deducted immediately. The home office deductions guide provides a related explanation.
2. Professional development, training and education expenses
A CPD seminar for a registered practitioner and a postgraduate degree leading to a new profession sit on opposite sides of the income-connection test. Training that maintains or improves skills used in current work may support a deduction, while study that enables entry into a different profession may not.
For medical professionals, allied health practitioners, accountants and other regulated workers, current-practice seminars, technical journals and professional memberships can be relevant. Check whether the expense supports present assessable income rather than a future role. A practising membership connected to current duties also requires a different analysis from a non-practising or personal membership.
Apportion mixed-use costs. If a journal, subscription or membership serves both professional and private purposes, claim only the income-related share. Treat the cost according to its nature and the applicable self-education rules rather than assuming every course fee is an immediate deduction.
Keep the enrolment invoice, payment evidence, attendance records and course description. Record the current duties the training supports and the basis for any private-use apportionment. Review the ATO guidance on deductible expenses before claiming. Everglow's guide to tax-deductible costs provides a related explanation.
3. Vehicle and motor vehicle expenses
A vehicle deduction follows the vehicle's work-related use, not ownership. Fuel, servicing, insurance, registration and decline in value may be deductible to the extent the vehicle supports assessable income. Private travel must be excluded. Travel between home and a regular workplace is commonly private, while journeys between work locations may receive different treatment on the facts.
The method chosen affects the evidence required. A logbook method records business and private use in detail. A simplified method may apply in particular circumstances, but the taxpayer still needs reliable records of work-related journeys and must meet the relevant rules. Keep the method consistent with the records that support it.
Tom, a Brisbane tradie, uses his work vehicle between job sites and to carry tools. His records should show each journey's date, destination, purpose and odometer details, with private travel separated. Fuel receipts support the expense but do not establish the business percentage.
Vehicle records should explain how each journey produced or supported assessable income. A full tank of fuel does not show that every kilometre was business-related.
Vehicle costs can intersect with employee reimbursements, fringe benefits and business structure. Where an employer reimburses or pays for travel, review this guide to handling employee travel expenses before claiming the same cost personally. Apply the same discipline to the car tax deduction resource: keep the logbook current and reconcile it with fuel and servicing records at year-end, so the business percentage can be demonstrated without reconstructing the trips.
4. Interest on borrowed funds used to produce assessable income
The tax treatment of interest depends on how the borrowed funds are used. Borrowing applied to acquire or support an income-producing asset may produce a deduction, subject to Australian tax rules. Private use generally remains private, even if the borrower owns other investments.
The Nguyen family in Parramatta borrows $500,000 to purchase a rental property. Interest may form part of the rental calculation if the funds were applied to that property, taking account of the loan documents, ownership structure, rental activity and other requirements. The same conclusion does not automatically apply to a private redraw.
Mixed‑purpose loans require tracing and apportionment. Separate investment and personal borrowings where possible, then retain loan statements, drawdown records, settlement documents and evidence showing how each advance was spent. The interest claim should follow the income connection, not the property securing the loan.
Refinancing does not preserve the original tax character for additional funds used privately. Loan movements should be reviewed against the ATO's deductions guidance. Everglow's mortgage interest and tax deduction guide explains how tracing applies to redraws and offset accounts. Keep evidence that supports both the use of the funds and the calculation of any apportionment.
5. Depreciation and capital allowances on business assets
A business asset may be capital rather than an ordinary operating expense. Capital treatment usually means the cost is recognised over time under the applicable depreciation or capital allowance rules, rather than claimed as an immediate revenue expense.
The immediate write-off rules are particularly time-sensitive. Under current ATO guidance for 2025–26, an eligible business with aggregated annual turnover of less than $10 million may immediately deduct an eligible asset costing less than $20,000, where the asset is first used or installed ready for use between 1 July 2025 and 30 June 2026. The rule can apply to new and second-hand assets that meet the criteria. The threshold applies per asset, and the timing of first use or installation matters. See the ATO instant asset write-off guidance.
Tom, the Brisbane tradie, may be deciding whether to replace equipment before year-end. The decision shouldn't be based only on the possible deduction. Cashflow, private use, financing, eligibility, installation timing and future depreciation treatment also matter. Buying an asset solely for a deduction can leave the business with less cash and equipment it didn't need.
An asset register should record purchase date, cost, description, business-use percentage, method and supporting documents. Everglow's capital allowance and capital works explanation is relevant where the distinction is unclear.
6. Salaries, wages and employee benefits
Businesses may generally claim genuine employee remuneration connected with earning assessable income, subject to payroll, superannuation, fringe benefits and other obligations. This category is different for a sole trader. A sole trader generally can't claim their own drawings as wages, but may claim eligible payments to employees and other business costs.
A business should keep employment agreements, payroll reports, superannuation records, payment evidence and documents supporting bonuses or benefits. The amount and nature of the payment should reflect the services provided. A payment that is private, excessive or not properly documented can create both tax and governance concerns.
Castle Medical, a GP partnership, may incur salaries and support-staff costs while providing medical services. Its accounting records should distinguish employee remuneration, contractor payments, partner distributions and private expenditure. That classification matters because each category can have different tax and reporting consequences.
Employee benefits may also trigger fringe benefits tax or payroll obligations. A benefit isn't automatically a simple deduction because it appears on a business bank statement. Review the payment through payroll and tax records before finalising the return.
The ATO's business deductions guidance should be checked for the relevant entity and expense. Payroll documentation is part of the evidence, not an administrative afterthought.
7. Repairs and maintenance to premises and equipment
A repair generally restores an existing asset to its previous condition. Work that improves, extends or substantially changes the asset may instead be capital expenditure, with deductions determined under depreciation or capital works rules. The income connection matters, as does whether the expense relates to business, rental or private use.
Tom may pay a contractor to fix a leaking roof on his Brisbane workshop or replace a worn compressor component. Restoration may support a repair deduction, while increased capacity, a higher-grade replacement or an extension may require capital treatment. The accounting result depends on the work performed, not merely the payment description.
The same distinction applies to the Nguyen family's Parramatta property. If one project includes restoration and an upgrade, ask the contractor for two line items, one for restoring the existing asset and one for the improvement. Attach a short before-and-after condition note, because a bundled description can leave the apportionment to be reconstructed later.
Retain photographs, inspection reports, approvals, itemised invoices and payment records. Record the asset's use and exclude any private portion. The ATO deductions guidance can help assess the treatment before a significant claim is made.
8. Office supplies, consumables and business sundries
Routine consumables used in producing business income may be deductible as operating expenses. Examples can include stationery, printing, postage, packaging and cleaning supplies used for the business. The income connection still matters, particularly where the same goods are used privately.
A computer, printer, desk or other longer-lived item may not belong in the same expense category as paper or postage. It may be a depreciating asset, with the deduction determined under the relevant capital rules. Classifying everything as “office expenses” can hide that distinction.
Dr Anya Sharma, a Sydney sole trader, may buy stationery for her practice and use a separate computer for administrative work. She should retain supplier invoices and identify business use. If an item serves both the practice and private life, the private portion should be excluded or apportioned.
The ATO's deduction rules focus on whether the expense was incurred in earning income and whether the taxpayer can substantiate it. A bank statement may support payment, but it may not explain what was purchased or how it was used. A monthly supplier statement, itemised invoice and expense description create a stronger record.
9. Accounting, legal and professional advice fees
Professional fees may be deductible when the advice relates directly to current income-producing activities. Tax compliance, business contracts, commercial leases and operational legal advice can have a different character from personal estate planning, private disputes or the initial establishment of a structure.
Dr Anya may receive an invoice that combines business tax work with personal financial planning. The invoice should identify the services, and the taxpayer should separate the business-related portion from private advice. A bundled invoice that gives no useful description makes that allocation more difficult.
The Nguyen family may obtain advice about an investment property structure. The tax treatment can depend on the nature of the advice, the ownership arrangement and whether the expenditure is revenue, capital or private. A fee connected with acquiring or establishing an asset may not receive the same treatment as recurring income-producing management.
Ask advisers to itemise work by subject and entity. Keep engagement letters, invoices, payment records and advice summaries. Everglow's mortgage interest and tax deduction resource is relevant where advice fees and investment borrowings form part of the same decision, but the actual deduction remains dependent on the facts.
10. Bad debts and doubtful debts
A bad debt claim requires more than an overdue invoice. The debt generally needs to have been included in assessable income, and the business must have written it off as irrecoverable. That treatment differs from a general concern that a customer may not pay.
Castle Medical may bill patients or other parties on credit and later identify accounts that can't be recovered. Before claiming a bad debt, the practice should retain the invoice, ageing report, correspondence, payment arrangements, collection notes and the decision approving the write-off. The evidence should show why recovery was considered unreasonable or hopeless.
A cash-basis practitioner may not have the same bad-debt deduction because the unpaid amount hasn't been included in assessable income. The accounting method and the timing of income recognition therefore matter.
A doubtful-debt provision is not a substitute for reviewing individual debts. A general provision based only on a percentage of receivables may not establish that a particular debt was written off. Use a documented credit policy and review overdue accounts regularly.
10-Item Tax Deduction Comparison
| Item | 🔄 Implementation complexity | ⚡ Resource & record-keeping requirements | 📊 Expected outcomes & quality (⭐) | 📊 Ideal use cases | 💡 Key advantages / concise tips |
|---|---|---|---|---|---|
| Work-related expenses & home office deductions | Medium 🔄, apportionment and method choice (simplified vs actual) | Moderate ⚡, receipts, timesheets/logs or hours record; utility bills | High 📊, substantial recurring deductions; ⭐⭐⭐ (audit focus for large claims) | Employees, sole traders, professionals with a dedicated home office | 💡 Keep timesheets; use simplified rate for small claims; retain receipts for actual method |
| Professional development, training & education expenses | Medium 🔄, must demonstrate nexus to current work | Low–Moderate ⚡, invoices, certificates, attendance records | Moderate 📊, reduces tax on skills maintenance; ⭐⭐⭐ (not for initial qualifications) | Regulated professionals (doctors, lawyers, accountants) maintaining competence | 💡 Retain completion evidence; document relevance to current role; avoid claiming initial-study costs |
| Vehicle & motor vehicle expenses | High 🔄, method selection, logbook rules, commuting exclusions | High ⚡, 12‑week logbook or odometer records, fuel/repair receipts, trip purpose | High 📊, large deductions for heavy work travel; ⭐⭐⭐ (high audit scrutiny) | Trades, couriers, locums, frequent work travellers | 💡 Maintain contemporaneous logbook; don't claim commuting; choose method that maximises accurate claim |
| Interest on borrowed funds used to produce income | Medium 🔄, tracing loan use and apportionment for mixed-use loans | Moderate ⚡, loan agreements, bank statements, evidence of asset purchase/use | High 📊, significant deduction for leveraged investments; ⭐⭐⭐ | Property investors, margin loans, business asset financing | 💡 Segregate investment borrowing; keep loan drawdown records and apportion mixed-use loans |
| Depreciation & capital allowances on business assets | High 🔄, determine effective life, method (diminishing/prime), capital vs repair | High ⚡, asset register, purchase invoices, ATO effective-life references, disposal records | High long-term 📊, non-cash deductions improving cash flow; ⭐⭐⭐ | Businesses with plant/equipment or investment properties | 💡 Maintain fixed asset register; compare methods per asset; consider CGT effect on disposal |
| Salaries, wages & employee benefits | Medium 🔄, payroll, FBT and superannuation compliance | High ⚡, payroll system, contracts, PAYG, super records, FBT documentation | Very high 📊, often largest deductible expense; ⭐⭐⭐⭐ | Employers, partnerships, incorporated practices with staff | 💡 Ensure wages are market‑reasonable; document payroll policy; monitor super and FBT limits |
| Repairs, maintenance to premises & equipment | Medium–High 🔄, distinguish repairs vs capital improvements | Moderate ⚡, itemised contractor invoices, before/after records, scope documents | Moderate 📊, immediate deduction for genuine repairs; ⭐⭐⭐ (capital works treated differently) | Property owners, businesses maintaining premises or plant | 💡 Request itemised invoices; document original condition; get advice for large renovations |
| Office supplies, consumables & sundries | Low 🔄, straightforward expense treatment | Low ⚡, receipts or supplier statements; items under $75 may rely on summary evidence | Low–Moderate 📊, routine small deductions; ⭐⭐ (low audit risk) | All businesses for daily consumables and low-cost items | 💡 Bundle supplier invoices; separate consumables from capital purchases |
| Accounting, legal & professional advice fees | Low–Medium 🔄, show nexus to income; apportion bundled advice | Low–Moderate ⚡, itemised invoices, engagement letters, fee allocation | Moderate–High 📊, deductible and often tax‑efficient; ⭐⭐⭐ | Businesses and professionals needing tax, legal or compliance advice | 💡 Obtain itemised bills; allocate between personal and business work up front |
| Bad debts & doubtful debts provisions | High 🔄, accruals-basis rules and proof of recovery efforts | High ⚡, ageing schedules, collection correspondence, write-off approvals | Variable 📊, recovers tax where income not received; ⭐⭐ (strict substantiation) | Businesses extending credit or professional practices with receivables | 💡 Implement documented collection process; write off only after genuine recovery attempts |
Make the evidence match the claim
The core answer is straightforward, but applying it requires discipline. A cost may be deductible only when it is sufficiently connected with assessable income, correctly treated as private, revenue or capital, and apportioned where mixed use exists. The taxpayer also needs records that show what was purchased, when it was incurred, how it was used and why the claimed amount is reasonable.
The ATO says individual deduction records generally need to be kept for five years from the date the tax return is lodged. Where total deductions are more than $300, written evidence such as receipts or invoices is required. Where total deductions are $300 or less, the taxpayer still needs records such as a spreadsheet or calendar entries showing how the claim was calculated. See the ATO record-keeping guidance.
A useful file should bring together invoices, receipts, logbooks, home-working time records, loan statements, asset registers, payroll documentation and debt-recovery evidence. Digital records are acceptable when they remain accessible and clearly identify the underlying transaction.
Consider four taxpayers reviewing the same tax right off list. Dr Anya Sharma in Sydney may consider the business-use portion of home-office costs and professional education. Tom in Brisbane may review vehicle records and whether an equipment purchase costing less than $20,000 meets the current instant asset write-off conditions. The Nguyen family in Parramatta may trace investment-loan funds, while Castle Medical may review payroll and debts written off under its accounting method. Each decision depends on the taxpayer's circumstances and current ATO guidance.
A tax right off list is a starting point, not a claim by itself. The right approach depends on the taxpayer's income connection, private use, entity, timing, records and current ATO guidance.
Frequently asked questions
Can employees claim home-office expenses?
Employees may claim eligible working-from-home expenses where the cost has a direct connection with earning income, is not private or reimbursed, and is supported by records. For 2025–26, the ATO fixed-rate method is 70 cents per hour and requires records of total hours worked from home across the income year. The applicable method and eligibility depend on the circumstances.
Which vehicle method should a taxpayer use?
The suitable method depends on the vehicle, work-related travel, running costs and available records. A logbook method can support a detailed work-use calculation, while a simplified method may suit particular circumstances. Private travel must be excluded. Keep journey details, odometer information and supporting costs rather than relying on a retrospective estimate.
Is professional education deductible?
Education may be deductible when it maintains or improves skills used in a current income-earning activity. Study that enables entry into a new profession may not qualify. Keep the course description, invoice and evidence explaining the relationship between the study and existing work. Regulated professionals should review the position before enrolling in a substantial qualification.
How do repairs differ from improvements?
A repair generally restores an existing asset, while an improvement or substantial replacement may be capital. The distinction depends on the work's substance, not only the invoice label. Ask contractors to itemise restoration and improvement work separately, and retain photographs or reports showing the asset's condition before the work.
Is interest deductible on borrowed funds?
Interest may be deductible when borrowed funds are used to produce assessable income, subject to the relevant rules. Private borrowing generally doesn't qualify. Mixed-purpose loans require careful apportionment and tracing. Keep loan agreements, statements, drawdown records and purchase documents, particularly when refinancing or redrawing funds.
Can a business claim bad debts?
A business may be able to claim a bad debt where the debt was included in assessable income and was written off as irrecoverable. Collection efforts and the write-off decision should be documented. A cash-basis taxpayer may not be able to claim an unpaid amount that hasn't yet been included in assessable income.
If you would like clarity on how these principles may apply to your own circumstances, contact Everglow on 1300 913 929 or email contact@everglow.au.
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Everglow Prosperity can help professionals, sole traders and businesses review deductions alongside tax, cashflow, lending and broader financial structures. For a coordinated discussion about your records and decisions, visit Everglow Prosperity.
Tags: Australian tax deductions, tax right off list, small business tax, work-related expenses, home office deductions, instant asset write-off, vehicle tax deductions, Australian accounting
