Debt Recycling: How Aussies Make Their Mortgage Tax-Deductible (The Honest Maths)

Same $50,000. Same shares. Same market risk. About $15,752 more - and the entire difference is a tax label on a loan. That's debt recycling: a long-standing Australian strategy that turns part of your non-deductible home loan into deductible investment debt. We run the honest after-tax maths on a persona - Sarah, $150k, mortgage at 6.1% - show exactly what it's worth at each tax bracket, and walk through the three ways people wreck it. It's powerful, and it's easy to botch - so we do both halves. Free offset & debt-recycling calculator - now runs the recycled line too, for your rate, your bracket, your timeline. A learning tool, not advice: https://offset-invest.netlify.app Chapters 0:00 The $15,752 question 1:09 Meet Sarah - the setup 1:45 Two kinds of debt - the rule it hangs on 2:32 Debt recycling in four moves 3:34 What the tax office chips in 4:11 The 10-year picture - three ways 5:10 The refund scales with your bracket 6:08 Does the 2027 change break it? 7:06 Wreck #1 - mixing the split 8:00 Wreck #2 - the rate premium 8:47 Wreck #3 - doing it for the deduction 9:33 When the maths favours it 10:34 The honest verdict New here? The full offset vs shares head-to-head this follows on from:    • A Boring Offset Account Nearly Beat the AS...   Subscribe for Aussie money decisions with the actual maths, not vibes - a whole series, one honest number at a time. General information only - not financial, tax or legal advice. I am not a licensed financial adviser. Debt recycling is a complex, higher-risk strategy that is not suitable for everyone; whether it's appropriate, and how it must be structured and documented, depends entirely on your personal circumstances - get advice from a licensed financial adviser and a registered tax agent before acting. All figures are illustrative examples based on stated assumptions, loan and split at 6.1% owner-occupier variable, RBA Jun-2026, split modelled interest-only at the same rate - some lenders price investment splits higher, which reduces the benefit; S&P/ASX 200 Accumulation 8.1% p.a. over 20 years - past performance is not a reliable indicator of future returns; effective marginal rates 32/39/47% incl. Medicare; 50% CGT discount on assets held over 12 months, paid at disposal; 4% dividends 75% franked; refunds assumed banked to an offset compounding at the loan rate; figures nominal, before brokerage, fund and loan fees; assumes sufficient taxable income to absorb deductions. Interest deductibility depends on the purpose of each borrowing tracing to income-producing use; mixed-purpose accounts can permanently compromise deductibility, and this simplified description is not a structuring guide. The 1 July 2027 change referenced is a proposed, not-yet-legislated measure concerning capital gains; the final law may differ or not proceed. The free calculator linked above is an illustrative educational tool only. Always verify current figures with the ATO and obtain personal advice from licensed professionals before making any decision. Do your own research.