How to Reduce Debt in Australia: Strategies That Actually Work

Not all debt is equal. The interest rate on each debt determines how urgently it needs to be addressed. Before choosing a strategy, map every debt you carry with its balance, interest rate, and minimum payment.

• High-cost debt (immediate priority): credit cards charge 19-22% per annum; store cards 25-30%; payday loans 48%+ (capped under ASIC's small amount credit contract rules at 20% establishment + 4%/month). These destroy wealth rapidly
• Medium-cost debt: personal loans 8-18%; car loans 6-15%; buy-now-pay-later (BNPL) products (Afterpay, Zip) that charge late fees and interest when not paid in full
• Lower-cost debt: home loans 5.5-7.5% (variable); fixed mortgages; student HECS-HELP (no real interest - only CPI indexation, currently returning to ~3% after the 2023 spike)
• HECS-HELP is uniquely low-cost: it carries no interest (only CPI indexation), repayments are mandatory once income exceeds $54,435, and the debt is discharged on death. Prioritising HECS repayment over high-cost credit card debt is a mathematical error
• The 'effective after-tax return' principle: paying off a 20% credit card generates a guaranteed 20% after-tax return - far better than almost any investment. Paying off a 6% home loan generates a 6% return - which is below long-term share market returns (historically 9-10% pre-tax for Australian shares)
• Total debt audit: list every liability (mortgage, car, credit cards, BNPL, personal loans, HECS, family loans) with current balance, interest rate, and minimum payment - this one exercise reveals the optimal attack order

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Two systematic approaches dominate personal debt reduction. The avalanche method is mathematically optimal; the snowball method is psychologically powerful. The best method is the one you actually stick to.

• Debt Avalanche: pay minimums on all debts, then direct every extra dollar to the highest-interest debt first. Once paid off, redirect that payment to the next highest-rate debt. Minimises total interest paid over the repayment period
• Example avalanche: $3,000 credit card at 21%, $8,000 personal loan at 13%, $15,000 car loan at 9%. Attack the credit card first - at $500/month extra, it's gone in 7 months, saving $370 in interest. Then the personal loan. Then the car
• Debt Snowball: pay minimums on all debts, then direct extra payments to the smallest balance regardless of interest rate. Quick wins build momentum and motivation
• Snowball benefit: behavioural research (Ariely, Amar) shows that people who see accounts eliminated entirely stay more committed to their debt plan - even if they pay slightly more total interest
• Hybrid approach: if you have one very small debt (under $1,000) and one very high-rate debt, pay off the small one first for the psychological win, then switch to avalanche order for remaining debts
• Automation is critical: set up automatic extra repayments on your highest-priority debt immediately after each pay day - money that hits your transaction account disappears into discretionary spending if not automatically redirected

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Balance transfer cards offer 0% interest for a promotional period - allowing you to pay down principal rather than interest. Used correctly, they accelerate debt elimination significantly.

• How it works: transfer an existing credit card balance to a new card offering 0% for 12-30 months. During the promotional period, every dollar of payment reduces principal - not interest
• Balance transfer fee: most Australian cards charge 1-3% of the transferred amount as an upfront fee. On $5,000 transferred with a 2% fee = $100 cost to potentially save $1,000+ in interest
• Discipline requirement: you must not use the new card for purchases (purchases often revert to a high rate immediately) and must pay off the entire balance before the promotional period ends - otherwise the remaining balance is charged the revert rate (typically 20-22%)
• Realistic scenario: $6,000 credit card debt at 20%. Balance transfer to 0% for 18 months with 2% fee. Monthly payment of $345 clears the debt in 18 months, paying only $120 in transfer fees vs $1,800+ in interest if left on the original card
• Credit score impact: applying for new credit temporarily reduces your credit score. Multiple applications in a short period (credit inquiries) can compound this effect - apply for one card, not several
• Australian providers offering balance transfers: St George, Westpac, ANZ, NAB, Citi, and various smaller issuers - compare at moneysmart.gov.au to find current offers

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An offset account is a transaction account linked to your mortgage. Every dollar in the offset reduces the mortgage balance on which interest is calculated - delivering a guaranteed return equal to your mortgage interest rate.

• How offset works: $500,000 mortgage at 6.2%. Keep $50,000 in the offset account. Interest is calculated on $450,000 - saving $3,100/year in interest. The $50,000 in offset earns an effective 6.2% tax-free return
• Tax-free benefit: unlike savings account interest (taxable at marginal rate), offset savings are not interest earned - they are interest not charged. This tax treatment makes the offset equivalent to a much higher pre-tax interest rate
• After-tax comparison at 37% marginal rate: a 6.2% offset saves 6.2% after tax. A savings account would need to pay 9.8% to match this after-tax return. The offset wins comfortably
• Mortgage shortening: $500,000 at 6.2% over 30 years with $50,000 sitting in offset throughout reduces the loan term by approximately 7 years and saves over $165,000 in interest - without making a single extra repayment
• Offset vs redraw: redraw funds sit inside the mortgage account and may contaminate the deductibility of the loan if later used for investment purposes (ATO considers redrawn funds to have a new purpose). Offset funds remain separate, preserving the tax character of the original loan
• Partial offset accounts: some lenders offer 100% offset (full credit for every dollar) and partial offset (e.g., 40%). Always choose 100% offset - partial offset is a marketing compromise that costs you money

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Making extra repayments on your mortgage is mathematically equivalent to investing at your mortgage interest rate - guaranteed and risk-free. Compared to equity investing, it's lower return but lower risk.

• The rule of thumb: if your after-tax investment return exceeds your mortgage interest rate, invest. If your mortgage rate exceeds your after-tax investment return, repay the mortgage
• At 6.2% mortgage: the share market historically returns 9-10% pre-tax over long periods. At 37% marginal rate, a 9% share return becomes approximately 5.7% after tax on capital gains (with 50% CGT discount). The 6.2% mortgage repayment beats this - favouring extra repayments
• Timing matters: early extra repayments have a disproportionately large effect because they reduce the principal on which 25-30 years of future interest compounds. A $10,000 extra payment in year 1 of a 30-year mortgage saves approximately $32,000 in total interest
• Round-up strategy: if your minimum repayment is $2,734/month, round up to $3,000. The extra $266/month shortens the loan by approximately 5 years and saves $75,000+ in interest
• Offset vs extra repayment: money in an offset account is accessible for emergencies - money in extra repayments may only be accessible via redraw (which some lenders restrict or charge fees for). Offset provides the same interest saving with much greater flexibility
• HECS vs mortgage: if your mortgage rate exceeds HECS CPI indexation (currently ~3%), prioritise the mortgage over voluntary HECS repayments - the mortgage is more expensive debt

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The invest-vs-repay question has no universal answer - it depends on interest rates, tax position, time horizon, and risk tolerance. Here is a practical framework for making the right call.

• Always repay first: credit cards (19-22%), personal loans above 12%, payday loans (48%+) - no investment consistently beats these guaranteed after-tax returns
• Usually repay first: personal loans 8-12%, car loans above 8% - investment returns need to be very strong to justify carrying this debt
• Borderline case (invest or repay based on circumstances): mortgage debt 5.5-7.5%, car loans 6-8%. At these rates, long-term equity investing may outperform after tax - but margin of outperformance is narrow and depends on timing
• Usually invest first: HECS-HELP debt (only CPI indexation ~3%), low-rate personal loans below 5% - long-term investment returns are likely to exceed the cost of this debt
• Superannuation as a debt repayment alternative: salary sacrificing into super at 37% marginal rate generates a guaranteed 22% instant return (37% minus 15% tax). This often beats making extra mortgage repayments - particularly for employees more than 10 years from retirement
• Emergency fund first: before accelerating debt repayment or investing, maintain 3-6 months of expenses in an accessible savings account. Debt-free but cash-flow-negative leads to resorting to credit cards during emergencies - undoing progress

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