Do sole traders need to issue invoices?

Sometimes, and the “sometimes” depends on who you sold to and whether you’re registered for GST. Selling to a consumer, a receipt is required by consumer law above a dollar threshold and on request below it. Registered for GST and a customer asks for a tax invoice, the ATO requires one within 28 days. Not registered and selling to another business, neither of those two rules compels you to issue anything - but you’ll still want to, because the invoice is the only evidence of what was agreed.

Two separate rule sets are at work here, and they get mixed up constantly. Sorting out which one applies to a given sale takes about ten seconds once you’ve seen them side by side.

General information, not tax advice. The ATO is the authority - see ato.gov.au or ask a registered tax or BAS agent.

Two rules people conflate

The first is a tax rule. It’s about GST, it comes from the ATO, and it’s about tax invoices - documents that let a GST-registered buyer claim a GST credit. It only bites if you’re registered for GST.

The second is a consumer rule. It comes from the Australian Consumer Law, the ACCC explains it, and it’s about receipts and proof of transaction for people buying as consumers. It applies whether or not you’re registered for anything.

Neither rule says “every business must issue an invoice for every sale”. That’s why the honest answer to the question is conditional. What follows is each rule on its own terms.

If you’re registered for GST

Registered sellers issue tax invoices, and the timing rule is specific. The ATO’s tax invoices page states that if a customer asks for a tax invoice, you have to provide one within 28 days, unless the sale is $82.50 including GST or less.

Two details matter in that sentence. It’s triggered by the customer asking, not automatically. And the small-sale carve-out is low - $82.50 including GST - so on most commercial work the obligation is live.

What the document has to contain is a separate question with a precise answer: 7 required details for a taxable sale under $1,000, plus the buyer’s identity or ABN once the sale reaches $1,000. The full list is in what must legally be on an Australian tax invoice.

If you’re not registered for GST, none of this applies. You don’t issue tax invoices at all, and a document headed that way would be wrong.

Selling to consumers

Here the obligation isn’t conditional on GST and isn’t triggered only by a request. The ACCC’s guidance on receipts, bills and proof of purchase is that businesses have to give consumers a receipt for anything costing over $75. Below that, the consumer can ask for a receipt and the business has to provide it within 7 days. The threshold is close enough to an everyday job that a sale sitting either side of $75 is not somewhere to rely on the boundary, which is what the last section of this post is about.

The ACCC sets out what a receipt has to include: the business’s name, its ABN or ACN, the product or service, the date it was supplied, and the price. A receipt can be a GST tax invoice, a cash register docket, a handwritten document, or a digital receipt - the format is open, the content is not.

There’s a companion obligation for services. A consumer can ask for an itemised bill, and the business has to provide it within 7 days. An itemised bill shows how the price was worked out, including labour hours and hourly rate where relevant, and materials and what was charged for them. Consumers have 30 days after receiving the original bill to ask for the itemised version.

That last one is worth internalising if you do trade or professional work at a fixed price. A month after the job, someone can ask you to break a single number into hours, rates and materials. If your pricing was worked out on the back of a quote you can still find, that’s a five-minute job. If it wasn’t, it’s an uncomfortable reconstruction.

Not registered, selling to businesses

This is the only combination where neither the GST rule nor the consumer rule compels a document. Other obligations can still apply - a contract that requires an invoice before payment, or the documentation rules some state licensing regimes place on trades such as building, plumbing and electrical work - so the terms you signed and the rules for your trade are worth a look. It’s also the combination where not issuing one hurts the most.

Without an invoice there’s no agreed record of what was delivered, what was charged, or when payment was due. If the customer disputes the amount, you’re arguing from memory. If they simply don’t pay, you have nothing to escalate with, because a letter of demand or a tribunal application starts with a document showing what was owed and from when.

There’s a second, quieter cost. An invoice with no ABN on it triggers a withholding obligation for a business payer, and no invoice at all leaves their accounts payable with nothing to process. Both outcomes end the same way: your money sits on someone else’s desk.

What to keep, and for how long

Whatever the sale, the record-keeping obligation is the same and it’s the ATO’s. Its record keeping rules for business require most records to be kept for 5 years, generally from when the record was prepared or obtained, or the transaction completed, whichever is later. Digital records count, provided they’re a true and clear reproduction and you can produce them.

The records that support income are the ones people are loosest with, because expense receipts feel more like homework. Both sides matter, and the expense side has its own set of traps - small business deductions and record keeping covers those.

Note the asymmetry. The obligation to issue a document is conditional. The obligation to keep records of your income and expenses isn’t. Even a cash job to a private customer under $75 leaves you with income you have to be able to evidence.

The practical rule

The simplest habit is to invoice everything, every time, regardless of which of the rules above applies to the sale.

The conditional obligations are genuinely conditional, but working out which one applies on a per-sale basis costs more attention than just issuing the document. A single consistent habit removes the question entirely: every job gets a numbered invoice, every invoice carries your ABN, and the copy is kept. You’ll never be caught deciding whether this particular customer counts as a consumer, or which side of $75 this particular sale fell on, or scrambling to produce something within 7 days when someone asks.

It also removes an awkward conversation about cash work. A business that invoices everything has no category of sale that’s handled differently, which is a simpler story to tell yourself. The mechanics - numbering, dates, terms, what to send and when - are in how to invoice as a sole trader.

How Apsis helps

The reason people skip invoices is friction, so the fix is to make issuing one take less effort than deciding whether to. In Apsis, an invoice is a few fields on top of a client you’ve already saved: it numbers itself, carries your business name, ABN and payment terms automatically, and goes out as a PDF from your phone or laptop. The copy stays in the invoice list, searchable years later, which is what the 5-year rule actually asks of you. Quotes, invoices, and expenses with receipt uploads are all on the free plan, which covers 5 clients and 20 invoices a month, so the income and expense sides of the record live in the same place.