Most business owners ask the same question as EOFY approaches: “What can I legitimately claim to reduce my taxable profit?” The right answer is not to chase deductions for their own sake. It is to make sure every genuine business cost is captured, correctly apportioned and supported by records.
A well-managed deduction strategy can improve cash flow, reduce avoidable tax leakage and give you a clearer picture of how your business is performing. It also helps you make better decisions throughout the year, rather than scrambling to find receipts at tax time.
Start with the core deduction test
A business expense is generally deductible where it is incurred in earning assessable income or is necessarily incurred in carrying on a business for that purpose. However, deductions are not available to the extent an expense is capital in nature, private or domestic, or relates to exempt income.
In practical terms, ask three questions before treating an expense as a deduction:
- Was it connected to earning income or operating the business?
- Did the business actually incur the cost?
- Can you show how you calculated the business portion?
The expense does not need to produce income immediately. For example, advertising, professional software or business insurance may support future income rather than a particular sale. The key is that there must be a real and reasonable connection between the expense and the business.
It is also important to separate a deduction from a cash-flow decision. Spending money simply because it may be deductible rarely makes commercial sense. A deduction reduces taxable income, but your business still pays the balance of the cost itself.
Common operating expenses that businesses often overlook
Many day-to-day costs of running a business may be deductible where they are genuinely business-related. These are usually treated as operating expenses rather than capital purchases.
Depending on your circumstances, this may include:
- rent for business premises or a commercial workspace
- electricity, internet, telephone and software costs
- bookkeeping, accounting and tax agent fees
- advertising, website hosting, online marketing and design services
- bank fees and merchant charges
- business insurance premiums
- stationery, printing, postage and office supplies
- subscriptions to industry publications, professional memberships and business systems
- cleaning, repairs and maintenance costs connected with business premises or equipment
- salaries and wages paid to employees
- costs of engaging contractors, where the arrangement is properly documented and reported as required.
Salary and wage expenses can generally be deductible where they are incurred in the business. However, payments to owners, partners or beneficiaries need careful treatment. A sole trader cannot claim a deduction for drawings taken from the business, because the owner and business are not separate taxpayers for income tax purposes.
Related-party payments also need extra care. Paying a spouse, family member or associated entity does not automatically make an amount deductible. The work should be genuine, the payment should be commercially reasonable, and the arrangement should be properly recorded.
Professional costs can also be deductible where they relate to the ordinary operation of the business. For instance, ongoing accounting support, bookkeeping, debt collection and legal advice about trading agreements may be deductible. By contrast, costs connected with establishing, buying or restructuring a business can be capital in nature and may receive different tax treatment.
Assets, equipment and technology: claim the right way
Businesses regularly buy laptops, phones, machinery, tools, office furniture, point-of-sale equipment and specialised software. These purchases can be essential to growth, but the tax treatment depends on the type of asset, its cost, how it is used and the rules available to the business.
Under the general depreciation rules, a deduction may be available for the decline in value of a depreciating asset over time. The deduction must be reduced for any private or non-business use.
This means a laptop used partly for work and partly by the family should not be claimed as entirely business-related. The same principle applies to mobile phones, tablets, cameras and other equipment that can easily have mixed use.
Some small businesses may be able to access simplified depreciation measures or immediate deduction rules for eligible assets. These concessions can change, and eligibility can depend on matters such as business turnover, the asset’s cost, when it was first used or installed ready for use, and whether the relevant election has been made. It is worth confirming the current position before making a purchase based on an assumed tax outcome.
Keep detailed purchase records for assets, including:
- the invoice and payment evidence
- the date the asset was acquired
- when it was first used in the business
- how it is used
- any private-use percentage
- sale, trade-in or disposal details.
If your business is registered for GST and entitled to an input tax credit, the GST component that can be claimed as a credit is not also deductible for income tax purposes.
Home office, vehicles and travel need careful apportionment
Home-based businesses are common across Australia, especially for consultants, trades, online retailers and professional service providers. But working from home does not turn every household expense into a business deduction.
A business may be able to claim the business-related portion of running costs such as internet, phone, electricity, office supplies and the decline in value of relevant equipment. Where a home is genuinely used as the principal place of business, further expenses may be relevant, although claims for occupancy costs such as rent, mortgage interest, rates or land tax require particular care and can have wider tax consequences.
The important point is that the claim must reflect the actual business use. If a dining table is occasionally used for administration, it will not usually support the same type of claim as a dedicated and regularly used business workspace.
The ATO recognises both fixed-rate and actual-cost approaches for working-from-home running expenses in appropriate circumstances. Both methods require records, and the method that produces the highest claim is not necessarily the most suitable if it cannot be substantiated.
Motor vehicle claims require the same discipline. You can only claim the business-use portion of vehicle expenses. Depending on the business structure and vehicle type, different calculation methods may be available. A logbook is often valuable because it provides evidence of business use and can support a more accurate claim than relying on estimates.
Business travel may also be deductible where it is directly connected to earning business income. This can include travel to client sites, suppliers, temporary work locations, industry events or business meetings. Private travel, normal commuting and any personal component of a trip must be excluded.
For example, a sole trader who operates from a dedicated home office may travel to client meetings, purchase materials and attend an industry conference. Their records should separately identify business kilometres, parking, accommodation and conference costs, while excluding personal detours, holidays and ordinary private travel.
Superannuation, training and bad debts can be valuable deductions
Superannuation can be an important part of business tax planning, but timing and eligibility matter.
Employer contributions to a superannuation fund for employees may be deductible, subject to the relevant conditions. The deduction is generally available in the income year in which the contribution is made, rather than simply when the business intends or commits to make it.
Sole traders and partners may also be able to claim a personal deduction for eligible superannuation contributions. This requires meeting the applicable conditions, including giving the super fund a valid notice of intent to claim a deduction and receiving the fund’s acknowledgement. Contribution caps and other superannuation rules must also be considered before acting.
Training and self-education expenses can be deductible where they maintain or improve the skills or knowledge used in your current income-producing activities, or are likely to increase income from those activities. Expenses that help someone enter a new field, open a new income-earning activity or start a new profession may not be deductible.
Bad debts are another area that is sometimes missed. If a customer debt has become genuinely unrecoverable, a deduction may be available when the debt is properly written off. This is not simply a matter of an invoice being overdue. The business should have evidence of its collection efforts, the reason the debt is considered bad, and a clear record showing it was written off.
Know what not to claim
Maximising legitimate deductions also means recognising expenses that should not be claimed, or that require specialist review.
Common problem areas include:
- private groceries, personal clothing and household expenses
- owner drawings from a sole trader business
- the private component of phone, internet, vehicle or home-office costs
- expenses reimbursed by another party
- personal travel included within a business trip
- capital costs claimed as ordinary operating expenses
- entertainment expenses, which can have complex income tax and FBT implications
- fines and penalties
- costs incurred before a business is properly operating, depending on their nature.
A business payment made from a business bank account is not automatically deductible. Bank accounts show that money moved, but invoices, contracts, diary notes, logbooks and reconciliations help explain why the cost was incurred and whether it was business-related.
Good records protect your deductions
Strong record keeping is one of the simplest ways to protect your tax position. Business records generally need to explain transactions, be retained in writing or electronically, and be kept for the required period. In many cases, businesses need to keep records for at least five years, although some circumstances require longer retention.
A practical record-keeping system should capture:
- sales invoices and payment records
- supplier invoices and receipts
- contracts and quotes
- bank and loan statements
- payroll, superannuation and contractor records
- vehicle logbooks and odometer readings
- diary notes for travel, meals or mixed-purpose expenses
- asset registers
- GST and BAS records
- evidence supporting private-use adjustments.
Regular bookkeeping makes this process much easier. Rather than leaving decisions until EOFY, review expense categories each month or quarter. This can highlight missing receipts, incorrect coding, personal expenses paid through the business and opportunities to improve your systems before they become a problem.
Make deductions part of a broader profit strategy
The most effective tax strategy is not about claiming everything possible at the last minute. It is about structuring your records, spending and business decisions so that genuine deductions are identified as they arise.
Focus on commercial decisions first, then make sure the tax treatment follows the facts. Keep business and personal spending separate, document mixed-use expenses, review asset purchases before committing to them, and seek advice before relying on concessions that may have detailed eligibility rules.
This article is general information only and is not personal financial or tax advice. Tax outcomes depend on your business structure, records and individual circumstances. Speak with a registered tax agent or accountant, such as, for advice tailored to your situation.