Your marginal tax rate is the single biggest lever on how well debt recycling works. Every dollar of investment-loan interest you claim is worth exactly that rate in tax saved — so the difference between the 32% bracket and the 47% bracket can turn debt recycling from "nice to have" into "genuinely powerful". Here's exactly where the brackets sit for 2025–26 and how they feed into the strategy.
2025–26 resident income tax brackets
The rates below apply to Australian resident individuals for the income year 1 July 2025 to 30 June 2026. They are the redesigned Stage 3 tax cuts that took effect on 1 July 2024.
| Taxable income | Tax on this portion |
|---|---|
| $0 – $18,200 | Nil |
| $18,201 – $45,000 | 16% |
| $45,001 – $135,000 | 30% |
| $135,001 – $190,000 | 37% |
| $190,001 + | 45% |
On top of these rates, most taxpayers pay the 2% Medicare Levy, bringing the effective marginal rates to 18%, 32%, 39% and 47% for the four taxed brackets respectively. (Low-income earners below certain thresholds may pay a reduced levy or none at all — more on that shortly.)
What the redesigned Stage 3 cuts changed
The original Stage 3 plan — legislated under the Morrison government — would have collapsed everything from $45,001 to $200,000 into a single 30% bracket. The Albanese government redesigned the package before it took effect on 1 July 2024, keeping four brackets instead and delivering a tax cut to every taxpayer rather than concentrating relief at higher incomes.
The key changes were a new 16% rate on the $18,201–$45,000 bracket (down from the pre-existing 19%), a lift to the 37% threshold from $120,001 to $135,001, and a lift to the 45% threshold from $180,001 to $190,001. For debt recyclers, the net effect is slightly lower marginal rates across the board — which marginally reduces the value of each dollar of deduction but also leaves more after-tax cash to feed into the recycling loop.
Coming 1 July 2026: The 16% rate on the $18,201–$45,000 bracket is legislated to drop to 15%. If you earn within or through that bracket, your effective marginal rate (including Medicare) will fall from 18% to 17%. For most debt recyclers on higher incomes the practical impact is modest — roughly $268 in extra annual tax relief — but it's worth noting when projecting long-term scenarios.
Why your marginal rate drives the deduction
When you borrow to invest in income-producing assets, the interest on that loan is deductible under section 8-1 of the ITAA 1997. The ATO cares about the use of the borrowed funds — not which property secures the loan. That's why a clean loan split is essential: the investment portion's interest is deductible, the home portion's is not.
A deduction reduces your taxable income starting from the top dollars you earn. If your taxable income before deductions is $160,000, every dollar of interest you claim comes off income taxed at 39% (37% plus 2% Medicare Levy). The deduction is literally worth 39 cents per dollar to you.
That has a direct impact on the after-tax cost of your investment loan. The formula is simple:
After-tax interest cost = headline rate × (1 − marginal rate incl. Medicare)
Here's what a 6% investment-loan rate actually costs at each bracket:
| Effective marginal rate | Headline rate | After-tax cost | Tax saved per $100k borrowed |
|---|---|---|---|
| 47% | 6.00% | 3.18% | $2,820 |
| 39% | 6.00% | 3.66% | $2,340 |
| 32% | 6.00% | 4.08% | $1,920 |
| 18% | 6.00% | 4.92% | $1,080 |
A taxpayer in the 47% bracket saves $2,820 in tax for every $100,000 of investment debt at 6% — almost three times what someone in the 18% bracket saves. That gap is why debt recycling is most commonly associated with higher-income earners: the after-tax borrowing cost is lowest, so the spread between borrowing cost and expected investment return is widest.
Which bracket the deduction actually lands in
Your marginal rate is not a flat rate across all income. It applies only to the dollars in the highest bracket you reach. Because deductions peel off from the top, the first dollars of interest you claim are worth your highest marginal rate — but if your deductions are large enough to push your taxable income down into a lower bracket, the remaining portion is worth less.
For most debt recyclers this isn't a concern in the early years — a $500,000 investment split at 6% generates $30,000 in deductible interest, which would need to push you across a bracket boundary to matter. But it's worth keeping in mind if your income fluctuates or if your deductible debt grows substantially over time. Modelling the interaction in a calculator beats guessing.
A note on the Medicare Levy low-income thresholds
The 2% Medicare Levy applies in full once your taxable income exceeds the relevant threshold — for 2025–26, approximately $26,000 for singles (the exact figure is indexed annually). Below that, you pay a reduced rate or nothing at all. Families, seniors and pensioners have higher thresholds.
If your taxable income, after deductions, falls near these thresholds, the effective marginal rate picture can shift. In practice, very few people actively running a debt-recycling strategy earn below the single threshold — the strategy generally requires meaningful surplus cash flow — but it's a detail your tax professional should check if your circumstances are unusual.
Key takeaways
- The 2025–26 brackets (redesigned Stage 3) set effective marginal rates at 18%, 32%, 39% and 47% including the 2% Medicare Levy.
- A tax deduction is worth your marginal rate in cents per dollar — so it saves more for higher-rate taxpayers.
- At 6% interest, the after-tax cost ranges from 3.18% (47% bracket) to 4.92% (18% bracket) — a significant gap.
- Deductions reduce your top dollars first, making them most valuable to higher earners.
- From 1 July 2026, the lowest taxed bracket drops from 16% to 15%.
Model the tax impact on your own numbers
Plug in your income, loan rate and investment split to see exactly how your marginal rate affects the outcome — with 2025–26 brackets, franking credits and CGT built in.
Open the free calculator →Common questions
Does the Medicare Levy Surcharge affect debt recycling?
The Medicare Levy Surcharge (1%–1.5%) applies to higher earners without adequate private hospital cover. It doesn't change the deductibility of your investment interest, but it does increase your effective marginal rate — which actually makes each dollar of deduction worth slightly more. If you're subject to the surcharge, factor it into your modelling.
Can deductions push me into a lower bracket?
Yes. Deductions reduce your taxable income, so large enough claims can move your top dollars into a lower bracket. In that case, only the portion of the deduction that falls in the higher bracket is worth the higher rate. For most debt recyclers the effect is small, but it's worth modelling if your income sits close to a bracket boundary.
Do these rates apply to investment income as well?
Yes. Dividends, interest and other investment income are added to your assessable income and taxed at your marginal rate. Franking credits attached to Australian company dividends can offset some or all of the tax on those dividends — and any excess credits are refundable.