Quick answer
In Australia, the ATO requires you to keep tax invoices and other business records for a minimum of 5 years from the date the transaction was completed (or when the record was prepared, whichever is later). Records can be paper or digital, but they must be in English and readable on request. If a transaction is under dispute, the 5-year clock starts again from when the dispute is resolved.
Note: this is general information, not tax advice. Refer to ato.gov.au for the authoritative rules.
What “records” actually means
“Records” doesn’t just mean the invoice itself. The ATO expects you to keep anything that explains a transaction. For a typical sole trader that includes:
- Sales invoices (tax invoices issued to clients)
- Purchase invoices and receipts (for expenses you’ve claimed)
- Bank statements showing payments received and made
- Records of GST collected and paid
- Records of cash transactions (which still count!)
- Quotes, contracts, and timesheets that explain the work
- Credit notes, refund records, and write-offs
Each record should be linkable to the transaction it relates to. If the ATO asks “why did you claim this $850 expense?”, you should be able to produce the receipt within minutes, not days.
Paper or digital? Both are fine
The ATO explicitly accepts electronic records. A PDF in cloud storage, an emailed invoice archive, or invoices stored in an invoicing app all qualify, as long as:
- The files aren’t altered after the fact
- You can produce them on request (no “the hard drive died” excuses)
- They’re in English (or translated on request)
- They’re readable — a PDF beats a phone photo of a faded receipt
In practice, digital is dramatically easier. Paper fades, gets lost in moves, and can’t be searched. A cloud-backed digital archive is the modern default.
How to organise digital invoice records
Whether you use a dedicated invoicing tool or just folders on your computer, the same structure works:
- Folder per financial year (e.g.
FY 2024-25). Australian financial years run 1 July — 30 June. - Sub-folders for sales and purchases within each year.
- Consistent file naming — something like
INV-0042 ClientName 2025-05-12.pdf. Sortable, searchable, and easy to audit. - Two backup locations. One cloud service (Dropbox, iCloud, OneDrive, Google Drive) is a single point of failure; two is resilient.
- Annual archive. After each financial year wraps up, zip the year’s folder and keep it untouched as your audit-ready snapshot.
The 5-year clock: when does it start?
The clock starts on the later of:
- The date the transaction was completed
- The date the record was prepared
For an invoice issued on 1 July 2024 and paid the same day, you must keep the record until 1 July 2029 at minimum. If the same invoice is disputed and the dispute resolves on 1 March 2025, the clock starts from that date instead — meaning you must keep the record until 1 March 2030.
What if you lose an invoice?
During an ATO audit, gaps in your records can lead to disallowed deductions and GST credits. The penalty isn’t for the missing file itself — it’s for the claim you can no longer substantiate. If you claimed a $5,000 deduction and can’t produce the supporting invoice, that deduction can be reversed, and you may owe back tax plus interest.
The cheapest insurance is a backup. If your invoices live in an invoicing app with cloud storage, you’re already protected against the most common failure modes (lost phone, dead laptop, accidentally deleted folder).
How Free Invoice App keeps you covered
Every invoice you create in Free Invoice App is stored in your account permanently — well beyond the 5-year ATO minimum. You can search by client, date, or status, export PDFs on demand, and access them from any device. Cancelled or refunded invoices stay in your history with their full status trail.
If you need to hand records to an accountant or the ATO, you can export an entire financial year as a single batch. Get started free — your invoice history starts building from invoice #1.
Frequently asked questions
Can I keep invoices as PDFs instead of paper?
Yes. The ATO explicitly accepts electronic records. PDFs in cloud storage are valid as long as they aren’t altered after the fact and you can produce them on request.
Does the 5-year rule start from the invoice date or the financial year?
From the later of the transaction date or the date the record was prepared. An invoice dated 1 July 2024 must be kept until at least 1 July 2029.
What if my invoice is under dispute?
Keep the records until the dispute is resolved, then for a further 5 years. The clock resets from the resolution date.
Do I need to keep records of unpaid or cancelled invoices?
Yes. The ATO requires records of all business transactions, including cancelled, voided, and unpaid invoices. They form part of your audit trail.
What if I lose an invoice during an audit?
The ATO can disallow related deductions or GST credits, leading to back tax, penalties, and interest. Cloud-backed digital records are now the practical standard.