Tax is one of the largest expenses for high-income Australians. Over a working lifetime, effective tax planning can save hundreds of thousands of dollars — money that compounds in your investments and accelerates your path to FIRE. This guide covers the key tax strategies for Australian FIRE seekers, from salary sacrifice to franking credits to timing capital gains.
Understanding Australian tax brackets
Australia uses a progressive tax system where income is taxed at increasing rates as you earn more. For FY2024-25, the brackets are:
- $0 to $18,200: 0% (tax-free threshold)
- $18,201 to $45,000: 19%
- $45,001 to $135,000: 32.5%
- $135,001 to $190,000: 37%
- $190,001 and above: 45%
On top of income tax, most taxpayers pay the 2% Medicare levy on taxable income (with a low-income threshold), bringing the effective top marginal rate to 47%.
Understanding your marginal rate is crucial because every dollar of tax savings is worth more at higher rates. A $10,000 tax deduction saves $4,700 for someone in the top bracket but only $1,900 for someone in the 19% bracket.
Salary sacrifice to superannuation
Salary sacrifice is the most accessible tax strategy for most employees. You direct part of your pre-tax salary to super, where it is taxed at 15% instead of your marginal rate.
How it works
You arrange with your employer to reduce your salary by an amount that is instead contributed to super. For example, on a $150,000 salary, you might salary sacrifice $15,000:
Without salary sacrifice: $15,000 taxed at marginal rate (37% + 2% levy) = $5,850 tax
With salary sacrifice: $15,000 taxed at super rate (15%) = $2,250 tax
Annual tax saving: $3,600
Over 10 years, this single strategy could save $36,000 in tax — money that compounds in your super.
Contribution caps
For FY2024-25, total concessional contributions (employer SG + salary sacrifice + personal deductible) are capped at $30,000. Exceeding the cap means excess contributions are taxed at your marginal rate, negating the benefit.
Example calculation:
- Salary: $180,000
- Employer SG (11.5%): $20,700
- Maximum additional salary sacrifice: $30,000 - $20,700 = $9,300
Our superannuation tracking feature helps you calculate the optimal contribution level.
Franking credits
Franking credits are a uniquely Australian feature that can significantly benefit FIRE seekers, particularly in early retirement when taxable income is low.
How franking credits work
When an Australian company pays tax on its profits (at 30% or 25% depending on size), shareholders receive a credit for tax already paid. A fully franked dividend of $700 comes with $300 in franking credits, representing the $300 of company tax paid on the underlying $1,000 of profit.
You declare the grossed-up amount ($1,000) as income and receive the franking credits ($300) as a tax offset. If your tax liability on that $1,000 is less than $300, you receive the difference as a refund.
Franking credits in early retirement
This is where FIRE seekers gain a significant advantage. If your taxable income in early retirement is below the tax-free threshold ($18,200), you pay no tax but can still claim franking credit refunds.
Example:
- Taxable income from capital gains: $15,000 (after CGT discount)
- Fully franked dividends: $14,000 (gross $20,000 including $6,000 franking credits)
- Total taxable income: $35,000
- Tax on $35,000: ~$3,200
- Less franking credits: $6,000
- Refund: ~$2,800
This makes Australian shares particularly attractive for early retirees. Our franking credits feature models this in your projections.
Capital gains tax discount
One of the most valuable tax concessions is the 50% CGT discount for assets held longer than 12 months. Only half of the capital gain is added to your taxable income.
How it works
Example:
- Buy shares for $50,000
- Sell after 18 months for $80,000
- Capital gain: $30,000
- Taxable amount (after 50% discount): $15,000
- Tax at 37% marginal rate: $5,550
Without the discount, tax would be $11,100. The 50% discount saved $5,550.
Timing capital gains
Because CGT uses your marginal rate, timing matters enormously. Selling assets in a low-income year can dramatically reduce the tax paid.
Same $30,000 gain sold in early retirement (low income):
- Taxable amount: $15,000
- Falls within tax-free threshold and 19% bracket
- Tax: ~$0 to $1,000 (depending on other income)
Planning to realise gains in the first years of early retirement — when you have no salary income — can save thousands in tax.
Tax-loss harvesting
Capital losses can offset capital gains in the same year or be carried forward indefinitely. "Harvesting" losses strategically can reduce your tax bill.
How to harvest losses
1. Identify investments trading below your purchase price
2. Sell to crystallise the loss
3. Use the loss to offset gains
4. Reinvest in a similar (but not identical) investment to maintain exposure
Important: The "wash sale" rules prevent you from selling and immediately rebuying the same asset. While Australia does not have a specific wash sale rule like the US, the ATO can apply Part IVA (anti-avoidance) if you sell and repurchase the identical asset purely for tax purposes. Reinvesting in a similar but different ETF is generally acceptable.
Tax-effective investment order
Where you hold different investments matters for tax. The general principle: hold tax-inefficient investments in tax-advantaged accounts.
Inside super (15% tax on earnings)
- Bonds and fixed income (interest is fully taxable)
- REITs and high-distribution investments
- International shares without franking
Outside super (marginal rate)
- Australian shares with franking credits (credits offset your tax)
- Growth assets you plan to hold long-term (CGT discount applies)
- Property (depreciation and negative gearing deductions)
In your own name vs structures
For most FIRE seekers, holding investments in your own name is simplest. Trusts add complexity and cost that may not be justified unless you have specific asset protection or income-splitting needs. Company structures are rarely appropriate for passive investments due to the lack of CGT discount.
Negative gearing
Negative gearing occurs when investment property expenses exceed rental income. The loss reduces your taxable income, providing a tax benefit in high-income years.
How it works
Example:
- Rental income: $30,000
- Interest: $25,000
- Other expenses: $8,000
- Net loss: $3,000
- Tax benefit at 37% marginal rate: $1,110
The property is "negatively geared" — you are subsidising the shortfall, but the tax benefit reduces the out-of-pocket cost.
FIRE considerations
Negative gearing works best when you have high taxable income. In early retirement, with low or no income, the tax benefit disappears. A negatively geared property that costs you $3,000 per year provides no tax benefit when you are not paying tax.
If property is part of your FIRE strategy, aim to own it outright or have it positively geared before you stop working. Our property tracking feature helps you model rental income and expenses.
Offset accounts and debt recycling
Mortgage offset accounts
An offset account reduces the interest charged on your mortgage. If you have a $500,000 mortgage at 6% and $100,000 in an offset account, you only pay interest on $400,000 — saving $6,000 per year in interest.
For FIRE seekers, offset accounts serve multiple purposes:
- Emergency fund that effectively earns your mortgage rate (tax-free)
- Flexibility to withdraw for investments while maintaining offset benefit
- Better after-tax return than most savings accounts
Debt recycling
Debt recycling converts non-deductible debt (home mortgage) into deductible debt (investment loan). The basic process:
1. Pay down home loan
2. Redraw or use a separate split to invest
3. Interest on the redrawn amount becomes deductible (if invested in income-producing assets)
Example:
- Pay extra $20,000 off home loan
- Redraw $20,000 and invest in shares
- Interest on $20,000 (e.g., $1,200/year at 6%) is now tax-deductible
Over time, you convert your entire home loan to deductible debt while building investments. This is a legitimate strategy but requires careful record-keeping and understanding of the rules.
HECS-HELP strategy
HECS-HELP debt is unique: it is indexed to inflation (not interest) and repayments are income-contingent. For FY2024-25, repayments start at $51,550 income, beginning at 1% and rising to 10% for incomes above $151,200.
FIRE implications
Because HECS-HELP only requires repayment when income exceeds the threshold, it is low-priority debt for FIRE planning. In early retirement, if your income drops below $51,550, repayments pause entirely.
Voluntary repayments no longer attract a discount, so there is almost never a financial reason to pay HECS-HELP early. The money is better directed to investments earning a return above inflation.
Tax strategies for different FIRE phases
Accumulation phase (working)
- Maximise salary sacrifice to super (save tax at marginal rate vs 15%)
- Use negative gearing if appropriate for your situation
- Hold growth assets for 12+ months for CGT discount
- Build offset account balance
- Consider debt recycling if you have home mortgage
Early retirement (before 60)
- Realise capital gains in low-income years
- Draw from assets with franking credits to claim refunds
- Minimise taxable income to avoid HECS-HELP repayments
- Consider non-concessional super contributions to move assets into tax-advantaged environment before 60
- Harvest losses to offset any gains
Post-60 retirement
- Draw from super (tax-free from taxed funds)
- Use super pension to shelter investment earnings (0% tax vs 15% in accumulation)
- Structure remaining non-super assets for tax-efficiency
- Manage asset levels relative to Age Pension thresholds if applicable
Common tax mistakes
Selling too soon
Selling assets within 12 months forfeits the 50% CGT discount. Unless you need the funds urgently, waiting past the 12-month mark can halve your tax on gains.
Ignoring franking in early retirement
Some FIRE seekers avoid Australian shares because dividends are "taxable income." But in early retirement, franking credits often result in a net refund, making fully franked Australian shares highly tax-efficient.
Over-contributing to super early
While super is tax-advantaged, it is inaccessible until 60. Contributing heavily to super at 30 means the money is locked for 30 years. Balance super contributions with building accessible non-super wealth.
Poor record-keeping
Capital gains calculations require knowing your cost base. Keep records of purchase prices, brokerage, and any capital returns. Poor records can mean paying more tax than necessary.
Getting professional advice
Tax law is complex and changes regularly. While this guide provides general strategies, your specific situation may require different approaches. Consider consulting a registered tax agent or financial adviser who understands FIRE planning.
Particular situations that warrant professional advice:
- Complex investment structures (trusts, companies, SMSFs)
- Significant property portfolios
- Business income or self-employment
- International income or assets
- Large one-off events (asset sales, redundancy, inheritance)
Our tax calculations feature models your projected tax position, but it is not a substitute for professional advice on your specific circumstances.
Putting it together
Tax efficiency accelerates FIRE. By minimising tax during accumulation and optimising withdrawals in early retirement, you keep more of your returns working for you.
The key strategies for most Australian FIRE seekers:
1. Salary sacrifice to super up to the cap (or as much as you can while building non-super assets)
2. Hold growth investments for 12+ months for the CGT discount
3. Include Australian shares with franking credits in your portfolio
4. Use offset accounts for emergency funds and flexibility
5. Time capital gains for low-income years (early retirement)
6. Draw from tax-free super after 60
Use our FIRE calculator to model your projections with Australian tax rules built in. See our complete guide to FIRE in Australia for the broader picture.