Small Business Tax Deductions: The Ultimate Checklist for Australian Business Owners

Most Australian small business owners leave money on the table every single year — not through dishonesty, but simply because they don't know what they're entitled to claim. The ATO allows a deduction for any expense genuinely incurred in earning your business income, and the list is much longer than most owners realise.

This guide covers every major deduction category available to Australian small businesses, what you can and can't claim, the common mistakes that trigger ATO attention, and how to make sure you've got the records to back it all up.

All 12 Deduction Categories at a Glance

1. Home Office

With so many Australian business owners working from home — at least part of the time — home office deductions are one of the most commonly claimed and most frequently mis-claimed categories. There are two methods:

Fixed Rate Method: 67 cents per hour

The ATO's revised fixed rate method allows you to claim 67 cents for every hour you work from home. This rate covers electricity, gas, phone, internet, stationery, and computer consumables. You do NOT need to have a dedicated home office — a dining table or spare bedroom counts.

To use this method, you must keep a representative 4-week diary showing your pattern of home working hours. You can then apply this pattern to the full year.

Actual Cost Method

The actual cost method lets you claim the real business portion of each home expense separately. This is more complex but can produce a higher deduction, particularly if you have a large, dedicated home office. Under this method, occupancy costs (rent or mortgage interest) may be claimable, but note that this can affect the main residence CGT exemption on your home.

2. Vehicle & Car Expenses

Car expenses are one of the ATO's most scrutinised areas for small business. Two methods are available for individuals and sole traders:

Logbook Method

You keep a logbook for a continuous 12-week period recording every trip — date, destination, odometer, purpose, and distance. This establishes your business use percentage, which you then apply to total annual car running costs (fuel, insurance, registration, maintenance, and depreciation). A logbook is valid for 5 years if your usage pattern doesn't materially change.

This is generally the better method for business owners with high business use — the deduction can be substantially higher.

Cents Per Kilometre Method

Claim a flat 88 cents per business kilometre (2024–25 rate) for up to 5,000 km per year. No logbook needed — but you need a reasonable basis for calculating the kilometres (diary, calendar, or route records). This is simpler but capped at a maximum of $4,400/year per vehicle.

Remember: Travel from home to your regular work location is private and NOT deductible. Travel between work locations, to clients, or to suppliers is deductible.

For utes, panel vans, and commercial vehicles used primarily for business, the non-private portion is deductible as a straight business expense — not subject to the car expense rules.

3. Equipment, Technology & Depreciation

The Instant Asset Write-Off allows eligible small businesses to immediately deduct the full cost of a depreciable asset (new or second-hand) in the year of purchase, rather than depreciating it over several years. For 2023–24, the threshold is $20,000 per asset.

Eligible assets include computers, laptops, phones, printers, tools, machinery, vehicles, and office furniture. The asset must be used (or installed and ready to use) for business before 30 June.

Assets over the threshold are added to a small business depreciation pool and written off at 15% in the first year, then 30% per year thereafter.

4. Staff, Wages & Superannuation

Wages and salaries paid to genuine employees are fully deductible — including the superannuation guarantee contributions you pay on their behalf. One critical rule: super is only deductible when actually paid to the super fund, not when it accrues. Paying super late (after the quarterly deadline) means you lose the deduction AND face the Superannuation Guarantee Charge.

Staff training, uniforms with company branding, protective clothing, and relevant work tools provided to employees are also deductible. Workers compensation insurance premiums are deductible.

5. Business Premises

If you lease a commercial premises, the rent is 100% deductible. Also deductible: council and water rates, body corporate levies, building insurance, cleaning, repairs and maintenance (but not improvements — those are capital). Utilities used for business purposes (electricity, gas, internet) are deductible.

6. Professional Services & Advice

The fees you pay your accountant, tax agent, bookkeeper, and business lawyer are all deductible in the year they're incurred. This is one that many business owners forget — including the cost of preparing this year's tax return, BAS preparation fees, and ongoing advisory retainers.

Legal fees are deductible if they're revenue in nature — for example, reviewing a commercial lease, drafting an employment contract, or recovering a business debt. Legal costs for acquiring a capital asset (e.g., buying a business) are capital and not immediately deductible.

7. Marketing & Advertising

All costs incurred to promote your business are deductible: Google Ads, social media advertising, SEO services, PR, print materials, trade show fees, and website costs (ongoing hosting is revenue; the initial build may be capital). Branded merchandise given as gifts or promotional items is deductible.

Note: entertainment (taking clients to dinner, events, sporting tickets) is generally NOT deductible as a marketing expense — see below.

8. Insurance

Business insurance premiums of all kinds are deductible: professional indemnity, public liability, business interruption, cyber insurance, and workers compensation. Vehicle insurance is deductible to the extent of business use.

Income protection insurance: if you hold this personally (not through super), it's claimed in your personal tax return, not the business. If you're a sole trader, this is fine. If you're a company or trust, you can't claim a deduction at the company level for income protection on the owner.

9. Software, Apps & Subscriptions

Cloud-based software subscriptions are fully deductible as a business expense in the year incurred. This includes accounting software (Xero, MYOB, QuickBooks), Microsoft 365, Adobe Creative Suite, industry-specific platforms, project management tools, e-commerce platforms, and any app you pay for in connection with your business.

10. Bank Charges & Interest

Monthly bank fees, overdraft fees, merchant facility fees, EFTPOS terminal costs, and payment gateway fees (Stripe, PayPal, Square) are all deductible. Interest on a business loan is deductible to the extent the borrowed funds are used for income-producing purposes. If you've mixed personal and business borrowings, only the business portion of interest is deductible.

11. Business Travel

Overnight business travel is deductible — airfares, accommodation, and meals during an overnight trip (up to the ATO's reasonable amounts for meals and incidentals). Day trips without overnight stays don't attract a meal deduction (unless away from home for an extended period). Travel insurance for business trips is deductible.

Keep detailed records: dates, destinations, purposes, and receipts. The ATO scrutinises travel heavily because the line between business and personal holidays is often blurry.

12. Professional Development & Education

Self-education expenses are deductible if the course or training maintains or improves skills in your current business. This includes industry conferences, webinars, trade publications, professional membership dues, and courses related to your field. A new career or unrelated course is not deductible.

What You Can NOT Deduct

The Full Checklist — Category by Category

Use this as your annual review checklist before speaking with your accountant:

The Record-Keeping Rule: 5 Years

The ATO requires you to keep records that substantiate every deduction you claim for 5 years from when you lodge your return (or 5 years from the date of the record — whichever is later). This includes receipts, invoices, bank statements, logbooks, diary entries, and electronic records.

Apps like Xero, MYOB, Hubdoc, and Dext make it easy to digitise receipts on the go. There's no excuse for not having documentation in 2025.

Common Mistakes That Lead to ATO Letters

• Claiming 100% of a vehicle without a logbook when there is obvious private use
• Claiming home office costs under BOTH the fixed rate method AND separately claiming phone/internet
• Deducting entertainment expenses as "marketing" or "staff amenities"
• Claiming a deduction for a course that leads to a new career (not deductible)
• Claiming super after the quarterly payment deadline and taking the deduction in the wrong year
• Not separating mixed-purpose borrowings and claiming 100% of interest as a business deduction
• Forgetting to declare income while claiming high deductions — a classic audit trigger ratio

Getting It Right: Work With a Specialist

The biggest mistake small business owners make isn't over-claiming — it's under-claiming through ignorance. A good accountant will typically find deductions that more than cover their fee, while also ensuring your records are solid if the ATO ever asks questions.

At Elite Accounting Solutions, we work with small business owners across Melbourne and Victoria to ensure their deductions are maximised, their records are compliant, and their tax position is optimised — not just at tax time, but throughout the year.