Quick answer
Track every business expense against a category, keep digital evidence (receipt or invoice) for each one, and keep it all for 5 years minimum. Australian sole traders use a small set of standard categories aligned to the ATO’s deduction schedule — tools, vehicle, software, home office, professional fees, supplies, marketing, and a few others. Done consistently, this turns tax time from a panic into a 30-minute export.
Note: this is general information, not tax advice. Refer to ato.gov.au or your accountant for authoritative guidance specific to your situation.
Why bother tracking at all?
Three reasons, in order of how often they matter:
- Lower tax bill. Every legitimate business expense you can prove reduces your taxable income. Sole traders who don’t track expenses routinely pay tax on money they shouldn’t have to.
- Audit defence. The ATO can ask for evidence years after the fact. Without records, claimed deductions get reversed and you owe back tax plus interest.
- Pricing decisions. Once you know what it actually costs you to deliver an hour of work (software, vehicle, materials), you can quote properly. Most underpaid freelancers have no idea what their cost base is.
The 13 standard sole-trader expense categories
Australian sole traders and freelancers commonly use these categories. Each one maps to a line in the ATO’s deduction schedule, so totals at tax time are straightforward.
- Tools and equipment. Trade tools, cameras, laptops, phones (apportioned if used personally).
- Software and subscriptions. Cloud services, design software, invoicing tools, hosting, domain names.
- Vehicle and travel. Fuel, registration, insurance, servicing, tolls — for business use, either log-book method or cents-per-kilometre.
- Home office. Internet, electricity, depreciation on furniture — apportioned by the floor area or hours used for business.
- Professional fees. Accountant, lawyer, bookkeeper, financial adviser.
- Insurance. Professional indemnity, public liability, contents (business portion), income protection.
- Materials and supplies. Stock, consumables, on-site materials charged to clients.
- Professional development. Courses, books, conferences, certifications.
- Marketing and advertising. Ads, business cards, website, photography, stickers, signage.
- Communications. Mobile plan (business portion), business broadband.
- Bank and merchant fees. EFTPOS fees, payment processor fees, business account fees.
- Subcontractor / labour hire. Other ABN-holders you pay to do work.
- Other operating expenses. Anything genuinely business-related that doesn’t fit elsewhere.
What counts as evidence
The ATO requires written evidence for any work expense over $10 (and once total work-related claims exceed $300 in a year, evidence is required for every claim regardless of size). Acceptable evidence:
- The original receipt or tax invoice from the supplier
- A digital copy — clear photo, scan, or PDF download
- An emailed receipt (forward it straight into your expense log)
- Bank or credit card statements as a fallback if the receipt is lost
For each receipt, you should be able to identify: who you paid, how much, what for, the date, and the GST amount (if the supplier is GST-registered). Faded thermal-paper receipts are a real problem — photograph them the day you receive them.
The three habits that make tracking actually work
1. Log on the same day, every day
The single biggest failure mode is letting receipts pile up. You buy a $40 tool, throw the receipt in the ute, and three months later have no idea what it was for. Same-day logging (snap the receipt, set the category, done) takes 15 seconds. Doing it once a quarter takes a whole evening and you’ll still miss things.
2. One business account, one card
The most reliable defence against personal-vs-business muddle is a dedicated business transaction account and a single card you use for everything business. Every transaction on that account is a business expense. Personal stuff goes through your personal account. This alone saves hours of categorisation work.
3. Match every expense to its category
Unsorted expenses are worse than missing ones — they require manual reclassification at tax time. Pick the right category as you log. If you’re unsure, “Other operating expenses” is a fine bucket; an accountant can reclassify later.
Turning expense data into pricing decisions
Tracking isn’t just for the ATO. The data tells you what an hour of your work actually costs.
A simple worked example: a web designer with $9,000/year in software, $3,000 in professional development, $4,000 in vehicle and home office costs, and $2,000 in everything else has an $18,000 annual cost base. If they bill 1,200 hours a year, their base cost is $15/hour before any profit, super, tax, or insurance. Quoting at $50/hour, the actual take-home is much lower than they think.
Most freelancers underprice because they don’t see this number. Categorised expense data makes it visible.
How this connects to BAS and tax
If you’re GST-registered, every expense with GST contributes to a credit you claim back from the ATO each quarter via BAS. Categorised expenses with the GST amount captured let you total this in minutes. See how to prepare for BAS for the full workflow.
At end of financial year (30 June), your category totals feed straight into the deduction section of your individual tax return. Combined with your invoice income totals, this is your profit and loss — the number tax is calculated on. Records stay on file for the ATO’s 5-year minimum, covered in detail in how long to keep invoices and records.
How Free Invoice App tracks expenses
Free Invoice App ships with the 13 sole-trader categories above. Log an expense in seconds on mobile, attach a photo of the receipt, and the app calculates per-category totals across any date range. GST is captured per expense so it flows straight into BAS preparation. Combined with your invoice income data, you get a real-time profit-and-loss view, plus revenue and client reports. Get started free — the Starter plan tracks expenses and generates P&L reports at no cost.
Frequently asked questions
What expenses can I claim as a sole trader?
Any expense incurred in earning business income — tools, software, vehicle (business portion), home office portion, professional development, insurance, supplies. Personal expenses can’t be claimed; mixed-use items must be apportioned.
Do I need paper receipts?
No. The ATO accepts clear digital copies — photos, scans, PDFs. Just keep them unaltered and produceable for 5 years.
Can I claim expenses without a receipt?
Generally no for work expenses over $10. Bank statements can sometimes substitute but are weaker evidence.
How long do I keep expense records?
Five years from the date of the transaction. Disputes reset the clock from the date of resolution.
Should I track by category or by date?
Category. It aligns to ATO deduction lines and makes tax-time totals trivial.