Strategies 1 to 4: Super, Offset and Investment Timing
The most powerful legal tax reduction strategies in Australia are built into the tax system - they are features, not loopholes. These four strategies deliver the largest tax savings for the majority of Australian earners.
- Strategy 1 - Salary sacrifice into superannuation: Concessional super contributions (salary sacrifice or personal deductible) are taxed at 15% - not your marginal rate (up to 47%). For a 37% taxpayer contributing $10,000 extra into super, the tax saving is $2,200 ($3,700 marginal minus $1,500 fund tax). The concessional cap is $30,000 for 2024-25 (including employer SG). Carry-forward unused cap from up to 5 prior years if TSB is below $500,000 - allowing contributions well above $30,000 in a high-income year. This is the single largest legal tax reducer available to most Australians.
- Strategy 2 - Mortgage offset account: Not technically a tax deduction - but the after-tax return equivalent of an offset account beats most taxable investments for homeowners on 32.5%+ marginal rates. Every dollar in the offset saves interest at the mortgage rate (6.0–6.5%) tax-free. A HISA paying 5% gross generates only 3.15% after tax at 37%. The offset account wins by approximately 3 percentage points - without any risk. Maximise your offset balance before making taxable investments.
- Strategy 3 - Prepay deductible expenses before 30 June: Investment loan interest, income protection insurance premiums, and other deductible expenses can be prepaid up to 12 months in advance. Prepaying before 30 June brings the deduction into the current year - valuable when your income is higher this year than expected next year. Example: prepaying 12 months of IP premiums in June 2025 claims the deduction in 2024-25 (rather than split across 2025-26).
- Strategy 4 - Hold investments for 12+ months (50% CGT discount): When selling a capital asset held for more than 12 months, only 50% of the gain is assessable. This effective halving of CGT applies to individuals and trusts - not companies. Always check whether you are within 12 months of the acquisition date before selling. Deferring a sale by a few weeks to cross the 12-month threshold can save tens of thousands in tax on a significant gain.
Strategies 5 to 7: Negative Gearing, Deductions and Business
For investors and business owners, the next tier of strategies involves structuring investments and business arrangements to maximise deductible losses and expenses.
- Strategy 5 - Negative gearing: An investment property (or share portfolio) where deductible expenses (loan interest, rates, insurance, depreciation, management fees) exceed rental income generates a tax loss. This loss is immediately deductible against other income - wages, business income, other investment income. At a 37% marginal rate, a $10,000 investment property loss generates $3,700 in tax savings, reducing the after-tax cost of holding the property. The deferred benefit is capital gain on eventual sale (50% CGT discount applies if held 12+ months). Important: the ATO requires a genuine profit expectation - a property held purely to generate losses without any prospect of profit will not be respected.
- Strategy 6 - Depreciation and capital works deductions: Investment property owners can claim depreciation on plant and equipment (Division 40 - carpets, appliances, hot water systems, air conditioners) and capital works (Division 43 - 2.5%/year on the construction cost of buildings built after 15 September 1987). A quantity surveyor's tax depreciation schedule ($600–$900 one-off cost) identifies all depreciable items and maximises deductions over the property's life. For properties purchased after 9 May 2017, second-hand plant and equipment (items previously used by another owner) cannot be depreciated by the new investor - new builds and new items only.
- Strategy 7 - Claim all legitimate business deductions: Self-employed individuals and business owners can deduct all genuine business expenses incurred in producing assessable income. Common missed deductions: bank fees on business accounts, proportion of mobile phone used for business, subscriptions and software, professional development, business insurance premiums, home office costs for genuinely home-based businesses (actual occupancy costs proportional to workspace), and vehicle costs (logbook method). The ATO allows deductions for expenses that are necessarily incurred - not expenses that are merely convenient.
Strategies 8 to 10: Income Splitting, Timing and Giving
These three strategies require either the right structure already in place or specific circumstances - but for eligible taxpayers they can deliver substantial additional tax savings.
- Strategy 8 - Income splitting via family trust: A discretionary trust can distribute income each year to family members in lower marginal rate brackets - adult children (over 18), a lower-income spouse, or a company beneficiary. Example: $100,000 of trust income split equally between two adult children on $20,000 each of their own income - each pays tax at 19% on $50,000 of trust income vs the trustee paying 47% on the whole $100,000. Tax saving: approximately $23,000. Important: PSI rules prevent income splitting where the income is derived primarily from one person's personal services. Trust distributions to minors (under 18) are taxed at penalty rates - not the adult rate - except for trust distributions from testamentary trusts. The ATO also has integrity provisions (Section 100A) targeting distributions that are part of an arrangement to reduce tax where the economic benefit flows back to a higher-rate taxpayer - avoid distributions to adult children that are immediately returned to parents.
- Strategy 9 - Sell assets in a low-income year: Capital gains are assessed at your marginal rate on the discounted gain. Timing a sale into a year when your income is lower - retirement year, parental leave year, career break, sabbatical, or year after a business sale - reduces the rate applied to the gain. On a $200,000 discounted capital gain: tax at 47% marginal = $94,000; tax at 32.5% marginal = $65,000; tax at 19% marginal = $38,000. The difference of $56,000 (between 47% and 19%) can be achieved purely through timing - no structural change required. A large concessional super contribution in the gain year also reduces the marginal rate applied.
- Strategy 10 - Donate to deductible gift recipients (DGR): Donations of $2 or more to organisations registered as Deductible Gift Recipients (DGRs) are tax-deductible. At a 47% marginal rate, a $10,000 donation to a DGR charity costs the donor only $5,300 after tax - the government effectively funds $4,700 of the gift. Donating appreciated shares directly to a DGR charity provides an additional benefit: no CGT is triggered on the unrealised gain, AND the donor receives a deduction for the market value of the shares at the date of donation. This is one of the most tax-efficient forms of giving available in Australia.
What to Avoid: Tax Evasion vs Tax Minimisation
Every strategy in this guide is a legitimate tax minimisation technique - using provisions of the tax law as Parliament intended. Tax evasion (hiding income, falsifying records, using offshore accounts without disclosure) is a criminal offence. The line between aggressive minimisation and evasion is sometimes blurry - the general anti-avoidance provision (Part IVA) gives the ATO power to undo arrangements that have no genuine commercial purpose other than generating a tax benefit.
- Part IVA - the general anti-avoidance provision: If the dominant purpose of an arrangement is to obtain a tax benefit, and a reasonable person would not have entered the arrangement for any other reason, the ATO can cancel the tax benefit and impose penalties. Part IVA is not triggered by normal tax planning (using salary sacrifice, claiming deductions, structuring investments through trusts) - it targets arrangements that have no non-tax rationale.
- Specific integrity provisions to be aware of: (a) Section 100A - trust distributions to low-tax beneficiaries who do not enjoy the economic benefit. (b) Division 7A - deemed dividends from private companies to shareholders. (c) PSI rules - income splitting for personal services. (d) Wash sale provisions - ATO guidance on crystallising losses to immediately reacquire identical assets. (e) Franking credit integrity rules - 45-day rule, related party rebate rules.
- Get advice: Tax law is complex and changes regularly. The strategies in this guide are general in nature - whether each strategy is appropriate for your specific circumstances depends on your income, structure, investment mix, and tax position. A registered tax agent (search the Tax Practitioners Board register at tpb.gov.au) or tax-specialising financial adviser can identify the strategies that deliver the most benefit for your situation and ensure compliance.
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