Tax Advice Essentials For Small Australian Businesses

Starting and running a small business in Australia is exciting - and getting your tax settings right from day one is a big part of building a sustainable, compliant business.

If you’ve wondered “how much tax will I pay?” or “what do I actually need to register?”, you’re not alone. The good news is that with a clear plan (and the right professional support when you need it), small business tax doesn’t have to be overwhelming.

Note: Sprintlaw does not provide tax advice. The information below is general only. For tailored tax or accounting advice, speak with a registered tax or BAS agent.

What Is Small Business Tax In Australia?

“Small business tax” is a catch‑all phrase for the taxes and obligations that may apply to your business, depending on your structure and activities. At a high level, expect to deal with the following:

• Income tax: Paid annually on business profits. How it’s calculated depends on your structure (for example, sole traders are taxed at individual rates; companies pay the corporate rate).
• Goods and Services Tax (GST): A 10% tax on most goods and services. Registration is required if your GST turnover is, or is likely to be, $75,000 or more in a 12‑month period.
• PAYG withholding: If you have employees, you must withhold tax from their wages and report and pay it to the ATO.
• PAYG instalments: Many businesses make quarterly prepayments towards their expected income tax. The ATO will notify you if you need to enter the PAYG instalments system.
• State and territory taxes: Depending on where and how you operate, payroll tax, land tax or stamp duty may apply.

Your legal structure and registrations also matter. Most businesses will need an ABN, and companies, trusts and partnerships will use their own TFN. If you’re considering a trust or company, it’s worth understanding the ABN, TFN and ACN requirements before you lock in your structure.

Tax Rates By Business Structure

Your structure drives how your profit is taxed and who lodges the return. Here’s how the main options work in Australia.

Sole Trader

As a sole trader, your business income is your personal income. There’s no separate “business rate”. You pay tax at individual marginal rates, and you can access the personal tax‑free threshold (currently $18,200) and any individual offsets you qualify for.

Pros include simplicity and low setup costs. The key trade‑off is that there’s no legal separation between you and the business, so you’re personally liable for debts and claims.

Partnership

A partnership doesn’t pay tax itself. Instead, it lodges a partnership tax return showing the net profit (or loss) and how it was split. Each partner includes their share in their personal return and pays tax at individual rates.

It’s wise to document roles, profit shares and exit terms in a Partnership Agreement. Clear terms reduce disputes and make tax time less stressful.

Company (Pty Ltd)

A company is a separate legal entity that pays tax on its taxable income at the corporate rate. The current headline rates are:

• 25% for base rate entities - companies with aggregated turnover of less than $50 million and where base rate entity passive income (like interest and dividends) is no more than 80% of assessable income; and
• 30% for other companies.

After company tax is paid, profits can be retained for reinvestment, paid as salary (deductible to the company and taxed to you as an employee), or distributed as dividends (often with franking credits reflecting tax already paid by the company). If you’re leaning toward a company, consider your liability protection, growth plans and the practicalities of setting up a company properly from the start.

Trust

With a trust, the trustee generally distributes net income to beneficiaries, who then pay tax at their individual rates on the amount they receive. If income is retained by the trust without a valid beneficiary entitlement, it may be taxed at the top marginal rate. Trusts can offer flexibility and asset protection in the right circumstances, but the rules are technical - get specialist tax advice before you proceed.

How Your Structure Affects Cash Flow

The structure you choose influences not just tax rates but also when tax is paid and how profits are extracted. For example, companies pay tax at year‑end then may use franked dividends to pass profits to shareholders, while sole traders and partners include business profit directly in their personal returns. Consider your expected profitability, reinvestment plans and risk profile when deciding which path suits you.

How Do You Calculate Your Business Tax?

While the detail varies by structure, the basic logic is straightforward. Here’s a plain‑English way to think about it.

Step 1: Add Up Assessable Business Income

Include sales, service fees, interest on business accounts and other income. Work with amounts excluding GST if you’re registered, because GST you collect is not part of your income for tax purposes.

Step 2: Subtract Deductible Expenses

Take away your ordinary business costs - for example, supplies, rent, marketing, software, insurance, professional fees, bank charges, staff wages, superannuation and depreciation. Keep invoices and receipts to substantiate the deduction.

Step 3: Arrive At Net Profit (Or Loss)

This is your taxable profit before applying the relevant tax rates or offsets. If you make a loss, different rules can apply (for example, companies may carry losses forward subject to continuity tests; individuals have non‑commercial loss rules).

Step 4: Apply The Correct Tax Rate

• Sole traders and partners: Combine the net business profit with your other personal income and apply individual marginal rates and levies.
• Companies: Apply 25% or 30% depending on whether you’re a base rate entity (as defined above).
• Trusts: Beneficiaries pay tax on their distribution. If income is not properly distributed, the trust may be assessed at the top marginal rate on that amount.

Step 5: Factor In Offsets, Credits And Prepayments

Depending on your circumstances, small business concessions and tax offsets may reduce the final bill. Also consider any PAYG instalments you’ve already paid during the year - these prepayments are credited against your year‑end assessment.

Don’t Forget GST And Invoicing Rules

GST is separate to income tax but affects your cash flow. If you’re registered, you’ll charge 10% GST on most taxable supplies and claim credits on your business purchases through your BAS. In some industries, you might use recipient created tax invoices (RCTIs) where the customer issues the invoice - make sure your contracts reflect this and you meet the ATO’s conditions.

Ongoing Tax Obligations And Registrations

Getting set up is step one. Staying compliant month to month is what keeps penalties away and gives you clear financial visibility.

Core Registrations

• ABN: Most businesses need an Australian Business Number for invoicing and dealings with the ATO. Companies and trusts will also have a TFN for entity‑level returns.
• GST: Register if your turnover is or will be $75,000 or more. Voluntary registration can make sense if you have significant input GST credits (e.g. early equipment purchases).
• PAYG withholding: Register if you pay salaries or wages, or certain types of payments to contractors where withholding applies.

Activity Statements And Lodgements

• Business Activity Statements (BAS): Report GST, PAYG withholding and (if applicable) PAYG instalments monthly, quarterly or annually, depending on your registration and turnover.
• Tax returns: Lodge annually - sole traders include business schedules in their individual return; partnerships, trusts and companies lodge separate entity returns.
• PAYG instalments: If the ATO places you in the instalments system, you’ll make periodic prepayments towards your expected income tax. You can often vary instalments if circumstances change - get advice before you do.

Employment, Super And Payroll

If you employ staff, ensure you’re meeting Fair Work and superannuation obligations. Superannuation is generally payable on ordinary time earnings, and missed payments lead to the Super Guarantee Charge - an avoidable and expensive outcome. Clear Employment Contracts and robust payroll processes help you stay compliant.

Record Keeping

Keep accurate records (invoices, receipts, bank statements, payroll, asset registers) for at least five years. Good records make BAS lodgements and returns easier, support your deductions and reduce stress in an audit. It’s also smart to set clear invoice payment terms to manage cash flow predictably.

Deductions, Concessions And Cash Flow Tips

Small business owners often leave money on the table by not claiming legitimate deductions or by missing out on concessions they’re eligible for. Here are practical ways to optimise your position while staying compliant.

Common Deductible Expenses

• Operating costs: Rent, utilities, insurance, software subscriptions, merchant fees, postage and stationery.
• Professional services: Legal, accounting and consulting fees that directly relate to running the business.
• Marketing and web: Website hosting, advertising, domain renewals, design and promotional costs.
• Staff costs: Wages, superannuation, training, and eligible fringe benefits (noting FBT implications).
• Motor vehicle and travel: Business‑use proportion of fuel, maintenance and work‑related travel (keep a logbook where required).
• Equipment and assets: Depending on the rules in the year, you may deduct the full cost up to the legislated threshold or depreciate over time.

Small Business Concessions (Subject To Eligibility)

• Small business income tax offset: For eligible unincorporated businesses, a percentage offset (capped annually) may reduce your tax on business income.
• Instant asset write‑off / simplified depreciation: In some years, eligible assets up to a threshold can be written off immediately; otherwise, simplified pooling rules may apply.
• Trading stock simplification: If stock movement is minimal (below the legislated threshold), you may not need a formal stocktake.
• GST and PAYG reporting options: Some small businesses can elect simpler, less frequent reporting.

Concession thresholds and criteria can change in Federal Budgets and mid‑year updates. Always check current ATO guidance or speak with your tax adviser before relying on a concession for planning or cash‑flow purposes.

Cash Flow And GST

GST affects pricing, invoicing and the timing of cash receipts. If you sell to other GST‑registered businesses, the ability to claim input tax credits can influence how you structure deals - for example, using RCTIs where appropriate or aligning contract milestones with BAS cycles. Your Business Terms and Conditions should clearly state whether prices are GST‑inclusive or exclusive and set expectations for payment timing, late fees and invoicing details.

Privacy And Data For Online Sales

If you collect customer information (for example, through an online store or email list), Australian privacy law may apply. A compliant Privacy Policy and sound data practices protect your customers and reduce legal risk - and they also support trust, which ultimately supports sales and cash flow.

Legal Documents And Risk Management

Strong contracts won’t change the tax law, but they make tax compliance easier by clarifying who is paying for what, when GST applies and how records will be kept. They also reduce the chance of disputes that drain time and money.

• Business Terms and Conditions: Your go‑to document for sales and services. It should cover pricing (including GST treatment), payment timing, scope, warranties, liability and termination. Clear terms help you issue correct invoices and manage cash flow.
• Service Agreement or Customer Contract: For project‑based or ongoing services, set out deliverables, milestones, invoicing triggers and RCTI arrangements if used.
• Supplier and Contractor Agreements: Lock in quality, delivery schedules, IP and confidentiality - and specify whether amounts are GST‑inclusive, who issues invoices and what records are required.
• Employment Contracts and Policies: If you have staff, put written Employment Contracts in place and ensure payroll, leave and super are treated correctly in line with law and your agreements.
• Shareholders Agreement: If you’re operating through a company with co‑founders or investors, a Shareholders Agreement clarifies decision‑making, dividends and exits - all of which have tax and cash‑flow implications.
• Invoice And Payment Processes: Standardise how you quote and bill, including clear payment terms and accepted methods. Consistency makes BAS preparation cleaner and reduces debtor days.

If your business model involves platforms or marketplaces, consider whether you should allow or require RCTIs, and ensure the legal document set actually supports your chosen invoicing method.

Common Mistakes And When To Get Advice

Most small business tax problems are preventable. Here are frequent pitfalls and how to avoid them.

• Blurring personal and business spend: Mixed receipts make it hard to substantiate deductions and can increase your tax bill. Use separate bank accounts and keep clean records.
• Incorrect GST treatment: Charging GST when you’re not registered (or failing to charge it when you are) creates compliance issues and pricing confusion.
• No cash set aside for tax: If you spend every dollar received, BAS and year‑end bills can sting. A simple rule of thumb is to move a percentage of each sale into a tax reserve account.
• Late superannuation payments: Missing due dates leads to the Super Guarantee Charge and lost deductions. Automate payroll where possible.
• DIYing complex structure changes: Moving from sole trader to company, introducing a trust or bringing in investors has legal and tax consequences. Get professional advice before you change course.

Professional advice is especially valuable when you’re selecting a structure, crossing the GST threshold, hiring staff, expanding to new states, taking investment or buying/selling significant assets. If you need help with the legal setup, our team can guide your company set up, contracts and ongoing compliance so your advisers can nail the tax brief with clean inputs.

Key Takeaways

• Your structure drives how your profits are taxed: individuals (sole traders/partners) use marginal rates; companies pay 25% or 30% depending on base rate entity status; trusts distribute income to beneficiaries.
• Calculating tax follows a clear path: income minus deductible expenses equals net profit, then apply the right tax rate and consider offsets and instalments.
• Stay on top of registrations (ABN, GST, PAYG), BAS cycles, payroll and super - the ATO will notify you if PAYG instalments apply, but good record‑keeping is your responsibility.
• Claim legitimate deductions and check eligibility for small business concessions each year - thresholds and rules can change with Budgets.
• Well‑drafted contracts (Business Terms, supplier/customer agreements, Employment Contracts) and a compliant Privacy Policy make compliance easier and reduce risk.
• Seek professional tax and legal advice at key milestones to avoid costly missteps and keep your cash flow healthy.

If you would like a consultation for your small business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.