There’s a quiet pattern the ATO sees every year
Two businesses earn similar income. One lodges smoothly, claims everything it’s entitled to and moves on. The other scrambles, estimates and leaves money on the table or worse, attracts unwanted attention.
The difference isn’t clever tax strategy.
It’s record keeping.
And heading into 30 June, that gap is only widening.
The non-negotiable rule: no records, no deduction
The ATO is explicit: if your expense requires substantiation and you don’t have the evidence, it’s not deductible.
For business owners, this sits alongside the “three golden rules” of deductions – only claim what’s related to earning income, apportion private use and keep records to prove it.
That last point is where most issues start.
Because in practice, “keeping records” isn’t just about saving receipts; it’s about being able to clearly explain:
- what the expense was
- why it relates to income
- how you calculated the claim.
Without that, even legitimate deductions can fall over.
Habit #1: Capturing the right detail (not just the transaction)
A common trap is relying on bank or credit card statements. They show that money was spent but not what it was spent on.
The ATO expects written evidence (typically receipts or invoices) that include:
- supplier name
- amount
- date
- nature of the goods or services.
If that detail isn’t there, the claim becomes harder to defend. This is where strong operators differ: they capture the full story of the expense at the time it happens, not months later when memory fades.
Habit #2: Separating business and private use early
Many expenses aren’t black and white. Phones, vehicles, home offices often have mixed use. The ATO requires you to apportion and keep records showing how you worked it out.
That might mean:
- a logbook for vehicle use
- a diary over a representative period
- a floor-area calculation for home offices.
The key is timing. Trying to reconstruct this at year-end rarely holds up. The businesses that get it right build these records progressively throughout the year.
Habit #3: Avoiding estimates altogether
It’s tempting to “round up” or back-fill missing details.
The ATO is clear: don’t use estimates when preparing returns or BAS – claims should be based on complete and accurate records.
There is a limited exception:
- If total work-related expenses are $300 or less, written evidence isn’t required but you still need to show how the claim was calculated.
Beyond that, the expectation is evidence (not approximation).
Habit #4: Keeping records for long enough (and knowing when longer applies)
The standard rule is simple: keep records for longer than five years (typically seven years) from when you lodge your return.
But this is where many businesses get caught out. Some records must be kept longer, particularly where they:
- relate to assets or capital gains
- are used across multiple years
- support carried-forward losses.
In those cases, records must be retained until the relevant review period has passed for the last year they affect. In other words: five years is the baseline, not always the finish line.
Habit #5: Keeping records that tell the full financial story
Good record keeping isn’t just about deductions, it’s about completeness.
The ATO expects businesses to maintain records of:
- all income and sales
- all expenses (including cash purchases)
- GST, payroll and super obligations
- assets and stock movements.
This is what allows your tax return to reconcile properly. When records are incomplete, inconsistencies start to appear and that’s where risk increases.
Habit #6: Making records accessible and usable
Records don’t just need to exist – they need to be usable. They must be:
- in English (or easily translated)
- stored in a way that can be retrieved if requested
- an accurate reflection of transactions.
This is where digital systems have an edge—but only if they’re used consistently.
A folder full of uncategorised receipts isn’t a system. It’s just a different kind of mess.
EOFY reality: small habits, big consequences
At EOFY, record keeping becomes visible.
- Strong records → faster lodgement, confident claims, fewer queries
- Weak records → delays, missed deductions, increased scrutiny.
And importantly, poor records don’t just reduce deductions – they can lead to adjustments, penalties and compliance costs that far outweigh the original claim.
The bottom line
There’s no shortcut here. The businesses that get the best outcomes at tax time aren’t guessing, reconstructing or defending – they’re simply prepared.
Because throughout the year, they’ve built habits that make EOFY straightforward:
- capture detail early
- separate business and private use clearly
- avoid estimates
- retain records properly
- keep everything consistent and accessible.
Do that, and your tax return becomes a process—not a problem.
If your record keeping feels reactive rather than reliable, now is the time to reset. Reach out to your Omnis adviser to review your systems, close any gaps and make EOFY 2026 a process, not a problem.
Sources
- Australian Taxation Office (June 2025), Records you need to keep, Australian Government
- Australian Taxation Office (November 2025), Documents to support and verify your claims, Australian Government
- Australian Taxation Office (July 2025), Business deductions, Australian Government
- Australian Taxation Office (November 2019), Records required for your business’s tax return – deductions, Australian Government
- Australian Taxation Office (October 2022), Record-keeping tips, Australian Government
- Australian Taxation Office (August 2025), Records to keep longer than five years, Australian Government
- Australian Government 2026, Record keeping, business.gov.au
- Australian Government 2026, Tax deductions – records you need to keep, business.gov.au
