12 Legal Ways to Reduce Income Tax in Australia for Small Business Owners

The Legal Difference Between Tax Minimisation and Tax Evasion

Before diving in: reducing your tax through legitimate deductions, concessions and structures is entirely legal. The Australian tax system is designed with these provisions intentionally — Parliament created them to incentivise specific behaviours like investing in super, buying equipment and employing people.

Tax evasion is different. Evasion involves hiding income, fabricating deductions or deliberately misrepresenting transactions. That is illegal and carries serious penalties including prosecution.

Everything in this article is legal tax minimisation — using the rules as they were intended to be used.

1. Maximise Concessional Superannuation Contributions

This is the single most powerful tax reduction tool for most Australian small business owners earning above $45,000.

Concessional (before-tax) super contributions are taxed at only 15% inside the super fund, rather than at your marginal income tax rate. For someone in the 30% bracket, that's a 15% saving on every dollar contributed. For someone in the 37% bracket, it's a 22% saving.

The concessional contributions cap for 2025–26 is $30,000 (including your employer's SG contributions if applicable). Sole traders can make personal contributions and claim them as a tax deduction by lodging a Notice of Intent to Claim with their super fund before their tax return is filed.

If you haven't maximised concessional contributions in prior years, unused carry-forward amounts from the last five years can be accessed if your super balance is under $500,000 — allowing potentially large catch-up contributions in high-income years.

2. Claim Every Legitimate Business Deduction

The rule is simple: expenses incurred in producing assessable income are deductible. The problem is that most small business owners claim too few deductions because their books aren't clean enough to identify all of them.

3. Use the Instant Asset Write-Off

For eligible small businesses, the instant asset write-off lets you deduct the full cost of a qualifying asset in the year it is first used or installed, rather than depreciating it over several years. For 2024–25 the threshold was $20,000 per asset for small businesses (turnover under $10 million). Check the ATO's website for the 2025–26 threshold, as it may change with the Budget.

Timing matters: the asset must be installed ready for use before 30 June for the deduction to apply in that year. Ordering equipment that arrives in July means the deduction falls into the next year.

4. Prepay Deductible Expenses Before 30 June

Small business entities can prepay up to 12 months of deductible expenses and claim them in the current financial year. This accelerates the deduction. Common examples:

• Business insurance premiums (prepay before 30 June for coverage starting in the new year)
• Rent for business premises
• Professional subscriptions renewed before 30 June
• Advertising contracts
• Trade and industry memberships

The 12-month rule requires the prepayment period to end on or before the last day of the income year following the year in which the expenditure is incurred. So a payment in June 2025 covering a period ending no later than 30 June 2026 qualifies.

5. Defer Income Where Legitimate

If your income is tracking significantly higher this year than you expect next year, delaying some income until after 30 June shifts it into a lower-income year. Practical examples:

• Delaying the issue of an invoice until 1 July (noting the work was completed after that date)
• Structuring a contract payment schedule to spread income across years
• Deferring the sale of an asset to a lower-income year

This is not about hiding income — the income is still fully declared, just in the appropriate year based on when it was earned. Cash basis taxpayers recognise income when received, which gives more flexibility. Accrual basis taxpayers recognise income when earned, which is less flexible.

6. Write Off Bad Debts Before 30 June

If you have invoices that are genuinely uncollectable, writing them off as bad debts before 30 June allows you to claim a deduction and potentially access a GST credit for the GST component. To qualify, the debt must be:

• Previously included in your assessable income
• Genuinely bad — not just overdue or disputed
• Written off in your accounts during the income year

Review your debtors list before year end. Old invoices outstanding for 90+ days are worth investigating and writing off if collection is unlikely.

7. Make Deductible Charitable Donations

Donations of $2 or more to registered Deductible Gift Recipients (DGRs) are fully deductible. There is no cap on charitable deductions. A donation of $5,000 to a DGR charity reduces your taxable income by $5,000, saving you tax at your marginal rate. The catch: only donations to DGR-registered organisations qualify. Check the ABR or ATO's DGR register before claiming.

8. Consider Your Business Structure

Sole traders pay income tax at individual marginal rates. Small companies pay a flat 25% company tax rate on profit. If your business profit exceeds roughly $100,000–$120,000, modelling a company structure is worth doing — retained earnings inside a company are taxed at 25% rather than the 37–47% you'd pay personally on that income.

The catch: when you take money out of the company as salary, PAYG applies. When you take dividends, they're franked at 25% — which means a top-rate individual (45% + 2%) pays only the shortfall. Restructuring has costs, so the modelling needs to account for the transition and ongoing compliance costs, not just the headline rate difference.

9. Pay Wages to Spouse or Family Members (Legitimately)

If your spouse or adult family member genuinely works in your business, paying them a market-rate wage for their contribution shifts taxable income from your higher bracket to their lower one. The wage must be:

• Reasonable — comparable to what you'd pay an unrelated employee for the same role
• For work actually performed
• Accompanied by proper payroll, super and STP reporting

The ATO scrutinises these arrangements, particularly when the amount is high relative to the work performed. Keep employment records, a position description and evidence of the work completed.

10. Use a Family Trust for Income Distribution

A family trust can distribute income to beneficiaries at different tax rates, rather than concentrating it on the highest earner. A beneficiary in the 0% or 19% bracket receiving a trust distribution pays significantly less tax on it than the trustee would if the income stayed undistributed.

This strategy is legitimate but increasingly under ATO scrutiny via Section 100A. Section 100A applies where there's an informal agreement that the actual economic benefit flows back to someone other than the documented beneficiary — essentially paper distributions without real money movement. Legitimate distributions flow to beneficiaries who actually receive and use the money.

11. Bring Forward Capital Expenditure

If you know you need new equipment, vehicles or technology in the coming year, buying and placing into use before 30 June allows the deduction in the current year. This works especially well when combined with the instant asset write-off or when this year is a higher-income year than expected next year.

12. Review and Vary Your PAYG Instalment Amount

The ATO sets quarterly PAYG instalment amounts based on last year's income. If this year is tracking significantly lower, you can vary your instalment to a lower amount and reduce the cash going out the door — keeping it in your business until tax time. You can vary to any amount you reasonably estimate will cover your actual liability.

Varying too low intentionally (below what you end up owing by more than 15%) results in an interest charge. But if your income has genuinely dropped, varying is smart cash flow management, not a tax avoidance strategy.

The Role of Clean Bookkeeping in Tax Minimisation

Most of these strategies depend on one thing: knowing your numbers. If your Xero is unreconciled and your income and expense categorisation is wrong, you cannot confidently claim deductions, you cannot model super contribution timing, and you cannot make informed prepayment decisions.

At True Tally, we see businesses overpaying tax every year — not through lack of strategies, but because their books don't surface the opportunities until it's too late to act. Clean, categorised, monthly Xero reconciliation turns these strategies from theory into actual tax savings before 30 June.

Frequently Asked Questions