If you run your business as a sole trader, it is easy to assume tax is something you deal with once a year at EOFY. In reality, you may have several tax obligations during the year, depending on whether you are registered for GST, have employees, or have entered the PAYG instalment system.
The simple answer is that a sole trader generally reports their income tax annually through an individual tax return. However, many sole traders also lodge a BAS and make PAYG instalment payments during the year. Understanding which obligations apply to you can make cash flow easier to manage and help avoid an unexpected tax bill.
A sole trader pays tax as an individual
A sole trader is not a separate legal entity from the person operating the business. Your business income forms part of your personal income for tax purposes.
This means you do not lodge a separate company tax return for the business. Instead, you include your sole trader income and allowable business deductions in your individual income tax return.
Your taxable position is worked out after considering your full financial situation for the income year. This can include:
- Income from your sole trader business
- Salary or wages from other employment
- Investment income, such as interest, dividends or rent
- Allowable business expenses
- Other deductible expenses that apply to you personally
- Tax already paid through PAYG instalments or PAYG withholding
If your business makes a profit, that profit is generally included in your assessable income. If it makes a loss, the treatment can depend on your circumstances and the rules that apply to business losses.
The key point is that money taken from the business bank account is not automatically a deductible wage to you. As a sole trader, you and the business are the same taxpayer. What matters is the business’s income and deductible expenses, not how much cash you transfer to yourself during the year.
When you may need to lodge a BAS
A business activity statement, commonly called a BAS, is used to report and pay certain business tax obligations. GST is the most common reason a sole trader lodges a BAS, but it is not the only one.
Your BAS may include amounts for:
- GST collected on taxable sales and GST credits claimed on business purchases
- PAYG instalments towards your expected income tax
- PAYG withholding amounts if you have employees or other workers from whose payments you must withhold tax
- Other less common business tax obligations, where relevant
Not every sole trader needs to lodge a BAS. If you are not registered for GST, do not have PAYG instalment obligations and do not have PAYG withholding obligations, you may only need to deal with tax through your annual individual tax return.
GST registration and BAS lodgment
You are generally required to register for GST if you are carrying on an enterprise and your current or projected GST turnover reaches the registration turnover threshold. For most businesses, the current threshold is $75,000.
GST turnover is not the same as profit. It is broadly based on the value of relevant sales over a rolling 12-month period, rather than the amount left after expenses.
You may also choose to register for GST voluntarily if you are below the threshold. Voluntary registration can be useful for some businesses, particularly where they have significant GST-bearing expenses or mainly deal with GST-registered business customers. However, it also brings reporting, record-keeping and lodgment responsibilities.
If you are GST-registered, your GST reporting cycle will usually be quarterly. Quarterly BAS periods and standard due dates are:
| BAS period | Standard due date |
|---|---|
| July to September | 28 October |
| October to December | 28 February |
| January to March | 28 April |
| April to June | 28 July |
The due date shown on your BAS is the date to rely on. If it falls on a weekend or public holiday, the next business day generally applies. Some businesses may also be eligible for additional time when lodging online or through a registered tax or BAS agent.
Most smaller GST-registered businesses report quarterly. Monthly reporting can apply where turnover is higher, where the ATO requires it, or where a business chooses to report monthly. A voluntarily GST-registered business that remains below the registration threshold may also be able to elect annual GST reporting, subject to the applicable conditions.
BAS is not the same as an income tax return
This distinction causes plenty of confusion.
A BAS reports selected obligations for a particular month or quarter. It does not calculate your final personal income tax for the year. Your annual tax return is still required if you have a lodgment obligation.
For example, a quarterly BAS may report GST on sales and purchases made during that three-month period. It may also include a PAYG instalment. Your annual tax return then brings together your full-year income, deductions, tax offsets and tax credits to determine your final position.
PAYG instalments: paying income tax progressively
PAYG instalments are regular prepayments towards the income tax you are expected to pay on business and investment income.
They are not an extra tax. They are credits paid during the year, which are taken into account when your annual tax return is assessed.
The ATO may place you into the PAYG instalment system after reviewing information in your tax return. This commonly happens when you have business or investment income and an income tax amount to pay. The ATO will notify you if PAYG instalments apply.
For many sole traders, PAYG instalments are paid quarterly through a BAS or instalment notice. Some eligible taxpayers can pay annually instead. Monthly PAYG instalments can apply in particular circumstances, although this is less common for smaller sole trader businesses.
There are usually two ways to calculate quarterly PAYG instalments:
- Instalment amount method: You pay the amount calculated and shown by the ATO.
- Instalment rate method: You apply an ATO-provided rate to your instalment income for the period.
The rate method can be helpful where income varies significantly during the year. A seasonal business, for instance, may earn much more in one quarter than another. The amount method can be simpler where business income is relatively consistent.
Can you vary a PAYG instalment?
Yes. If the amount or rate on your activity statement no longer reflects what you reasonably expect to earn, you can vary it.
This may be relevant if your business has experienced:
- A fall in sales
- Higher deductible expenses than expected
- A pause in trading
- A major contract ending
- A change in the mix of taxable business or investment income
- A strong increase in income that may make the prefilled amount too low
A variation should be based on a genuine and well-supported estimate. Reducing instalments without a reasonable basis can lead to general interest charge if the final tax outcome shows you significantly underpaid during the year.
Before varying, review your year-to-date sales, expenses, expected work pipeline, investment income and other taxable income. Good bookkeeping is especially important here. A variation should reflect current information, not simply a desire to improve short-term cash flow.
Your individual tax return is generally an annual obligation
Sole traders generally report their business income and deductions in their individual tax return after the end of the financial year.
For individuals who lodge their own tax return, the usual due date is 31 October following the end of the income year. Different due dates may apply if you use a registered tax agent, provided you engage them in time and meet the conditions of the relevant lodgment program.
Your annual tax return is where the final calculation happens. It reconciles:
- Your total income for the year
- Your allowable deductions
- Any business income or business loss
- PAYG instalments paid during the year
- Tax withheld from employment or other payments
- Any relevant offsets, levies or repayments
If your PAYG instalments and tax withheld are more than your final tax liability, you may be entitled to a refund after assessment. If they are not enough, there may be an amount left to pay.
This is why it is important not to view PAYG instalments as the final word on your tax. They are an estimate-based payment system. Your tax return confirms the actual result.
A practical example of how the obligations can work together
Consider a freelance graphic designer who operates as a sole trader. Their business grows during the year and they become registered for GST. They also receive a notice that they must begin paying PAYG instalments.
Each quarter, they prepare a BAS. It includes GST collected from clients, GST credits on eligible business expenses and a PAYG instalment towards their expected income tax.
At EOFY, they prepare their individual tax return. It includes the business’s full-year income and deductions, as well as interest earned on a savings account. The PAYG instalments already paid through the year are credited against the final income tax assessment.
The BAS payments did not replace the annual tax return. Instead, they spread some tax payments through the year and dealt with GST reporting as the business traded.
Keeping on top of tax throughout the year
The easiest way to manage sole trader tax is to treat it as a regular business process, rather than an EOFY task.
A practical routine might look like this:
Record income and expenses consistently. Keep invoices, receipts, bank records and supporting documents organised as transactions occur.
Separate business and private spending. A separate business bank account can make bookkeeping clearer, even though the business and owner are the same taxpayer.
Review GST registration regularly. Monitor your rolling turnover, particularly if your business is growing quickly or you win a major contract.
Set aside funds for tax. GST collected from customers and money needed for PAYG instalments should not be treated as available spending money.
Check PAYG instalments against actual performance. Review them before each BAS due date, especially if income has changed materially.
Prepare for EOFY before June ends. Reconcile accounts, follow up missing records and consider whether there are legitimate business expenses or income timing issues that need attention.
Business records generally need to be kept for at least five years, although longer retention can be necessary in some situations. Records should be complete enough to support the income, deductions and GST amounts reported.
The key takeaway for sole traders
Most sole traders deal with income tax annually through their individual tax return. If you are registered for GST, have PAYG instalments or need to withhold tax for workers, you may also have monthly, quarterly or annual activity statement obligations.
The right reporting cycle depends on your GST registration, turnover, staffing arrangements and tax history. A clear bookkeeping system and regular review of your BAS and PAYG instalments can make tax payments more predictable and reduce EOFY pressure.
This article is general information only and is not personal financial or tax advice. Tax obligations can differ depending on your business activities and circumstances. Speak with a registered tax agent or accountant, such as Ample Finance, for advice tailored to your situation.