Sole Trader Tax Obligations 2026–27: A Clear Checklist

Trading as a sole trader is the simplest way to run a business in Australia. You are the business, you keep what the business earns, and you report the whole lot through your own tax return. What catches people out is not the structure itself, it is the list of obligations that hangs off it.

This is a plain-English checklist of what the ATO expects from a sole trader for the 2026–27 income year, based on how sole trader tax obligations were set out in official and industry guidance published for the 2025–26 year. Rates and thresholds are set by the ATO and do change, so treat any figure here as a starting point and confirm the current numbers before you lodge.

What trading as a sole trader actually means

As a sole trader you are trading as an individual. There is no separate legal entity sitting between you and the business, and no company return to lodge. In practice, sole traders are required to provide a personal tax return as well as the business's profit and loss statement at tax time.

That single detail drives everything else. Your business income is your income. Your business expenses are your expenses. The ATO sees one taxpayer, not two, which is why the profit and loss statement matters so much. It is the document that explains how your business performed, and it feeds straight into the income you declare.

The upside is simplicity and lower compliance costs. The trade-off is that you and the business share the same tax identity, so a bad year for the business is a bad year for your personal return too.

Obligation 1: lodge a tax return every year

If you operate your business as a sole trader, you must lodge a tax return, even if your income is below the tax-free threshold. That last part surprises people. There is a common assumption that a quiet year means no paperwork, but the obligation to lodge is not based on how much you earned.

A return is also how you declare deductions, report business income and keep your record with the ATO current. Skipping a year because the numbers looked small can create a mess that takes longer to fix than a straightforward return would have taken to prepare.

Obligation 2: understand how your profit is taxed

Sole traders pay tax at the individual income rate. That is the key structural difference between trading as a sole trader and trading through a company, and it shapes how much you keep from a good year.

Feature	Sole trader	Company
Tax-free threshold	Available, as the individual tax-free threshold applies	Not available in the same way
Tax rate applied	Individual income tax rates	Full company tax rate of 30%, with different rates for companies that are base rate entities
How income is reported	Personal tax return plus the business profit and loss statement	Company tax return

The practical effect is that a sole trader pays tax as per the standard marginal tax rates, and can claim a tax-free threshold of $18,200. If your total taxable income falls below $18,200, you will not owe any income tax at all, though you still need to lodge.

Obligation 3: get your return in by 31 October

Tax returns are due by 31 October for sole traders. That date applies to the return covering the income year that has just finished, and it is the one deadline worth putting in your calendar the moment the financial year ends.

If someone else lodges on your behalf, confirm the date that applies to you before you rely on it. Building your profit and loss statement early makes the deadline comfortable rather than stressful, because most of the delay comes from chasing missing receipts at the last minute.

When a tax bill does land, payment options include BPAY, credit card and debit card, so you are not limited to one method.

Obligation 4: watch for PAYG instalments

Once your business income reaches a certain level, the ATO can bring you into the PAYG instalment system. Instead of paying your whole tax bill after lodgment, you pay it in instalments through the year, based on the ATO's calculation.

This matters for cash flow planning. A sole trader who has never paid an instalment before can be caught short when the first notice arrives, particularly in a year where income grew quickly. The ATO sets the thresholds and calculates the amounts, so check your ATO account or any instalment notice you receive rather than guessing what applies to you.

Obligation 5: handle GST and BAS if you are registered

GST is a separate obligation from income tax, and it only applies once you are registered. Registration depends on whether your turnover reaches the ATO's registration threshold, so check your current figures against the ATO's guidance rather than assuming you are under or over it.

Once registered, you charge GST on your sales, claim the GST you paid on business purchases, and report both through a Business Activity Statement. The ATO also notes that a Medicare levy can form part of what you pay as an individual taxpayer, which is another reason to look at your total position rather than just the headline rate.

Obligation 6: claim what you are entitled to claim

Deductions are where sole traders either save money or quietly give it away. As a sole trader, you can claim a deduction for salary, wages and allowances you pay your workers on your tax return, which is a meaningful cost for anyone who has taken on help.

Beyond wages, the principle is consistent: a claim needs to relate to earning your business income, and it needs to be supported by records. That is especially true for vehicle use, tools, equipment, home office costs and anything you use for both business and private purposes. Where an expense is mixed, only the business portion belongs on the return.

Obligation 7: keep records that stand up to scrutiny

The record keeping side of sole trader tax obligations is the part most people underestimate. A profit and loss statement is only as good as the receipts, invoices and bank records behind it, and a deduction you cannot support is a deduction you may have to repay, with interest.

Practical habits that make lodgment easier include separating business and personal bank accounts, photographing receipts at the point of purchase, and reconciling your records against your bank statements before you hand anything to an accountant. If you drive for work, keep a logbook. If you work from home, keep a running record of the hours and costs involved. If you are registered for GST, reconcile your GST collected and paid as you go rather than reconstructing it months later.

A simple checklist for the year

Separate your business money from your personal money.
Record income and expenses as they happen, not in a rush at the end of the year.
Keep every receipt, invoice and logbook entry that supports a claim.
Check whether you have reached the ATO's GST registration threshold.
Check whether the ATO has placed you into the PAYG instalment system.
Set money aside for tax as you earn, rather than spending the lot.
Prepare your profit and loss statement alongside your personal return.
Lodge by 31 October, or confirm your date if someone lodges for you.
Review your figures at the end of the financial year and check what has changed.

Tools that take the sting out of the paperwork

Lodgya was built in Melbourne to deal with exactly this problem. It is a browser-based income and expense tracker for Australian tax, and the business tracker is aimed at sole traders, with a mileage logbook, GST and BAS reconciliation and CSV import for anything you already track elsewhere.

Lodgya also publishes free ATO-focused calculators and a tax calendar covering key due dates, which is useful when you are working out what applies to you and when. The tool is not tax advice and it is not a registered tax agent, but it does mean your records are ready when your accountant asks for them.

Frequently Asked Questions

Do I need to lodge a tax return if I earned less than $18,200?

Yes. If you operate your business as a sole trader, you must lodge a tax return, even if your income is below the tax-free threshold. Lodging is how you declare business income and any deductions, and it keeps your ATO record current. Below $18,200 of total taxable income you will not owe income tax, but the return is still required.

How much tax does a sole trader actually pay?

Sole traders pay tax at the individual income rates, not the company rate. The full company tax rate is 30%, with different rates applying to companies that are base rate entities, which is one reason some businesses incorporate. As a sole trader you can also claim the $18,200 tax-free threshold, so a low income year may mean no income tax at all.

When is the sole trader tax return due?

Tax returns are due by 31 October for sole traders. If someone lodges on your behalf, confirm the date that applies to you with them. The reliable approach is to have your profit and loss statement finished well before the deadline, because most of the delay comes from tracking down missing records rather than from the lodgment itself.

Can I claim wages I pay my workers?

Yes. As a sole trader, you can claim a deduction for salary, wages and allowances you pay your workers on your tax return. Keep clear records of each payment and who received it, since the claim needs to be supported. If you are unsure how a particular arrangement should be treated, check the ATO's guidance or ask a registered tax agent.

Do sole traders have to register for GST?

GST registration depends on whether your turnover reaches the ATO's registration threshold, so check your figures against the ATO's current guidance. Once registered, you charge GST on your sales, claim GST paid on business purchases, and report both through a Business Activity Statement. Lodgya's business tracker includes GST and BAS reconciliation to make that reporting simpler.