Let’s get straight to the point: as a sole trader in Australia, you don’t have a separate “business” tax rate. Your business profit is considered your personal income and is taxed using the same brackets as any other individual taxpayer. This means your tax bill is directly linked to your total taxable income for the financial year.
Quick Answer: Your Rate is the Individual Tax Rate
The Australian Taxation Office (ATO) treats you and your business as one entity for tax purposes. This simplifies matters: you don’t need a separate business tax return; all your business income and expenses are reported in your personal income tax return.
Your tax bill is calculated on your taxable profit (business revenue minus allowable deductions) using the individual resident tax brackets, plus the Medicare levy.
Here are the resident tax rates for 2024-25, which will apply to the tax return you lodge in 2025.
Australian Resident Tax Rates 2024-25
| Taxable Income | Tax on this Income |
|---|---|
| $0 – $18,200 | Nil |
| $18,201 – $45,000 | 16% of amount over $18,200 |
| $45,001 – $135,000 | $4,288 plus 30% of amount over $45,000 |
| $135,001 – $190,000 | $31,288 plus 37% of amount over $135,000 |
| $190,001 and over | $51,638 plus 45% of amount over $190,000 |
Source: ATO. Note that non-residents have different rates.
In addition to income tax, you’ll also be responsible for the Medicare levy, which is typically 2% of your taxable income.
How to Calculate Your Sole-Trader Tax (5 Steps)
Calculating your sole trader tax doesn’t have to be complicated. By following a structured process, you can confidently determine what you owe. Consider it as building your tax outcome step by step, starting with your total earnings and refining it down to a final amount.
The 5-Step Calculation Process
- Work Out Assessable Income: First, sum up all your business revenue. Don’t forget to include any other income you’ve earned during the financial year, like a salary from a part-time job or earnings from investments. This total is your assessable income.
- Subtract Allowable Deductions: Deduct legitimate business expenses from your assessable income. The resulting figure is your taxable income – the crucial number the ATO uses for its calculations.
- Apply Resident Tax Brackets: Use the tax rates table above to calculate the base income tax payable on your taxable income.
- Add the Medicare Levy: For most taxpayers, this is 2% of your taxable income. Note that low-income thresholds and exemptions can apply.
- Subtract Offsets and Credits: Finally, reduce your tax bill by applying any tax offsets you’re eligible for, like the Small Business Income Tax Offset (SBITO). This is also where you subtract any PAYG instalments you’ve already paid throughout the year.
Key Takeaway: You are always taxed on your profit, not your total revenue. Maximizing your legitimate deductions is the most effective way to lower your taxable income and, consequently, your final tax bill.
Worked Examples (2024-25)
Let’s see how this process plays out with a couple of common scenarios.
Example 1: Freelancer with $80,000 Profit
- Taxable Income: $80,000
- Income Tax: $4,288 + (30% of $35,000) = $14,788
- Medicare Levy (2%): $1,600
- SBITO (est.): -$1,000 (maximum offset)
- Total Tax Payable: $15,388
Example 2: Consultant with $160,000 Profit
- Taxable Income: $160,000
- Income Tax: $31,288 + (37% of $25,000) = $40,538
- Medicare Levy (2%): $3,200
- SBITO (est.): -$1,000 (maximum offset)
- Total Tax Payable: $42,738
What Counts as a Deduction for Sole Traders?
Once you’ve totaled your income, the next step is reducing that figure with allowable deductions. This is the most effective way to decrease your taxable income and your final tax bill. For sole traders, a deduction is any expense directly related to earning your business income.
The government only taxes your actual profit. Every legitimate business expense you claim helps provide a clearer, more accurate picture of what that profit truly is.
- Operating Expenses: These are the day-to-day costs of keeping your business running: software, tools, insurance, professional development courses, and fees for your accountant.
- Car Expenses: If you use your car for work, you can claim its running costs using either the cents-per-kilometer method (up to 5,000 km) or the logbook method, which often results in a larger claim for high-mileage drivers.
- Home-Based Business Costs: Running your business from home? You can claim a portion of household expenses like internet, phone, and electricity. Be cautious with methods that claim occupancy costs (like rent or mortgage interest), as this can affect your main residence exemption from Capital Gains Tax (CGT) if you sell your home.
- Instant Asset Write-Off: This tax break allows you to immediately deduct the full cost of eligible business assets. The threshold changes, so always check the latest ATO legislation for the relevant financial year.
- Super Contributions: Making personal concessional contributions to your super fund is a powerful tax-saving tactic. These contributions are generally tax-deductible, up to your annual concessional cap, directly lowering your taxable income.
If there’s one golden rule for deductions, it’s this: keep good records. The ATO needs to see proof (receipts, invoices, logbooks) for your claims. A separate business bank account makes this whole process much easier.
For a deeper dive, check out our comprehensive small business tax deductions guide for 2025.
Offsets & Concessions That Reduce the Bill
After calculating your tax, offsets and concessions directly reduce the amount you have to pay. Unlike a deduction, which lowers your taxable income, an offset is a dollar-for-dollar reduction of your tax bill.
- Small Business Income Tax Offset (SBITO): This is a key benefit for sole traders. It allows you to reduce the tax on your business income by a percentage, capped at $1,000 per year, according to ATO instructions.
- Low Income Tax Offset (LITO): If your total taxable income (from business and other sources) is below certain thresholds, you may be eligible for the LITO. Note that the Low and Middle Income Tax Offset (LMITO) ended on 30 June 2022.
- Carried-Forward Losses: If your business has a loss in one year (i.e., deductions exceed income), you can generally carry that loss forward to offset against future business profits, reducing your tax in a more profitable year.
GST, BAS and How They Interact with Income Tax
When you’re running your own business, you’ll encounter GST and BAS lodgements. It’s crucial to understand they are separate from your income tax.
- GST Registration: You must register for GST when your projected or actual gross turnover (before expenses) reaches $75,000 in a 12-month period. Rideshare drivers must register from their first dollar earned.
- Business Activity Statement (BAS): Once registered, you must lodge a BAS (usually quarterly) to report the GST you’ve collected on sales and claim back GST credits on your business purchases.
- GST is Not Your Income: A common mistake is treating GST-inclusive amounts as business income. The GST you collect is held on behalf of the ATO and is not part of your taxable profit.
PAYG Instalments for Sole Traders
Pay As You Go (PAYG) instalments are a system for pre-paying your income tax. Instead of facing a large bill once a year, PAYG smooths things out by having you pay your estimated income tax in smaller, regular amounts (usually quarterly).
The ATO will usually enroll you into the PAYG instalment system automatically once your business income on a tax return exceeds a certain threshold. You’ll receive a notice each quarter to pay an instalment towards your final tax bill. These instalments are then credited against your final tax assessment when you lodge your annual return.
If your income changes significantly during the year, you can vary your instalment amount to better match your expected profit. We dive deeper into this in our guide to the quarterly PAYG instalment notice.
Pro Tip: Sync your PAYG instalment due dates with your BAS due dates to simplify your quarterly compliance.
Sole Trader vs Company: What’s Cheaper?
As your business grows, you’ll eventually face a decision: is the sole trader structure still right, or is it time to incorporate as a company? This impacts your tax rate, asset protection, and administrative costs.
A sole trader’s profit is taxed at their individual marginal rate, which can be up to 45% (plus Medicare). A company is a separate legal entity and pays a flat corporate tax rate (currently 25% for small businesses) on its profits. However, when you take that profit out of the company as a dividend, you pay “top-up” tax at your personal rate (though franking credits reduce this).
A company structure provides a separation between your personal assets and business debts—a significant advantage a sole trader lacks. But this comes with higher setup costs and more complex annual compliance rules.
Sole Trader vs Company: A Quick Comparison
This table highlights the key differences between the two most common structures.
| Factor | Sole Trader | Company |
|---|---|---|
| Tax Rate | Individual marginal rates (0% – 45% + Medicare) on all profit. | Flat company rate (e.g., 25%) on profit retained in the business. Dividends are taxed at personal rates. |
| Profit Retention | All profit is automatically treated as your personal income. | Profit belongs to the company and can be reinvested at the lower company tax rate. |
| Asset Protection | Unlimited liability; your personal assets are at risk. | Limited liability; personal assets are generally protected from business debts. |
| Admin & Cost | Simple and low-cost to set up and run. | Higher setup costs, annual ASIC fees, and more complex tax/accounting requirements. |
| PSI Risk | Personal Services Income (PSI) rules can limit deductions. | PSI rules still apply and can affect tax benefits if not managed correctly. |
The decision often comes down to your income level, whether you need to reinvest profits back into the business, and your risk tolerance.
Deadlines & Lodgement Checklist
Keeping track of your tax obligations is the best way to avoid stress and penalties. Mark these key dates in your calendar.
- Tax Return Due Dates:
- 31 October: Deadline for self-lodgers.
- 15 May (following year): General deadline if lodging through a registered tax agent (subject to your specific circumstances).
- BAS Quarterly Dates:
- 28 October: (Q1: Jul-Sep)
- 28 February: (Q2: Oct-Dec)
- 28 April: (Q3: Jan-Mar)
- 28 July: (Q4: Apr-Jun)
- Super Due Dates (if you have staff): Superannuation guarantee payments for employees are also due quarterly on these dates.
Documents to Prepare for Your Tax Return:
- Profit & Loss statement
- Depreciation schedule for assets
- Bank statements (business and personal)
- Vehicle logbooks
- Records of super contributions
- PAYG instalment notices
FAQs
Let’s clear up some of the most common questions sole traders ask.
Do sole traders pay tax on revenue or profit?
You are always taxed on your taxable profit, not total revenue. Taxable profit is your total business income minus all your allowable business deductions. Maximizing deductions is the key to lowering your tax bill.
Do I have to pay super for myself?
No, as a sole trader, you are not legally required to pay yourself super. However, making personal concessional contributions is a highly effective way to save for retirement while also getting a tax deduction that lowers your taxable income.
What tax rate if I have a side-hustle + salary?
The ATO combines your business profit and your employment salary to determine your total taxable income. This combined figure is then used to work out which tax bracket you fall into. This means your side-hustle profit is effectively taxed at your highest marginal tax rate.
How does the Medicare levy apply?
The Medicare levy is an additional 2% of your taxable income, charged on top of your income tax. It helps fund Australia’s public health system. Low-income earners may be eligible for a reduced rate or an exemption.
Should I register for GST under $75k?
Voluntarily registering for GST (if turnover is below $75,000) can be strategic. It allows you to claim GST credits on your business purchases, which is beneficial if you have high setup costs or expenses. The downside is the added compliance of lodging a regular BAS.
Will PAYG instalments reduce my final bill?
Yes, absolutely. PAYG instalments are pre-payments of your income tax. Every dollar you pay throughout the year is credited against your final tax assessment, reducing the amount you have to pay when you lodge your annual tax return.
When should I switch to a company?
Consider switching from a sole trader to a company when your profits are consistently high (e.g., pushing you into the top tax brackets), you want to reinvest significant funds back into the business for growth, or you need the legal protection of limited liability to separate your personal assets from business risks.
Need someone to manage the numbers and provide clear advice? Nanak Accountants and Associates can handle your BAS/PAYG setup, find every possible deduction, and help you decide if staying a sole trader or becoming a company is the right choice for 2025. Book a quick 15-minute chat to get started.
