Same surplus, two routes into the market. One is simple and needs no lender; the other adds a tax deduction and, if you draw equity, more exposure.
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If you hold a mortgage and invest your surplus, debt recycling the same surplus gives you the same investments and the same total debt, with the interest on the investment portion generally deductible. That deduction is the main difference, and it is small at first. Investing from cash flow wins when your tax rate is low, your horizon is short, your income is uncertain, or the structure costs more than it saves. Drawing extra equity on top is a separate leverage decision.
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Say you have $1,000 a month spare after the mortgage and living costs. You can buy shares or ETFs with it directly. Or you can use debt recycling: pay it onto the home loan, then redraw the same amount from a separate investment split and buy the same shares or ETFs.
Either way you end up owning the same investments. What changes is the loan behind them, and the paperwork.
Assumptions, all illustrative: a $500,000 home loan at 6%, $12,000 a year surplus, a 30% marginal tax rate plus the 2% Medicare levy, and the same ETFs bought either way. Returns and dividends are left out because they are identical in both paths.
| After 10 years | Cash flow investing | Debt recycling |
|---|---|---|
| Invested | $120,000 | $120,000 |
| Home loan (non-deductible) | Scheduled balance | Scheduled balance less $120,000 |
| Investment split (deductible) | $0 | $120,000 |
| Total debt | Same | Same |
| Deductible interest, year 10 | $0 | About $7,200 |
| Tax value of deductions, 10 years | $0 | About $12,700 |
In year one only $12,000 is recycled, so the deduction is worth about $230. It grows as each year's tranche is added. Putting the refunds back on the home loan adds a little more over time. Our debt recycling with shares and ETFs page shows how the split and the portfolio fit together.
Setup costs, such as any refinance or split fees, come off the debt recycling column. So does the time your accountant spends confirming the deduction each year.
Flexibility also differs. With cash flow investing, a bad month just means you skip a purchase. With recycling, the investment split stays in place and its interest is payable every month regardless.
The investment returns are the same either way, so neither route is safer on market risk when the surplus and the investments match. The figures are illustrative, not a forecast.
When you hold a mortgage and invest your surplus, you are already choosing not to pay that mortgage down. The investments are, in effect, funded by debt you kept. Debt recycling makes that link formal, so the interest on that portion becomes deductible.
That is why the example shows the same exposure and the same total debt. Recycling a surplus is not extra gearing; it is the same position with a different tax treatment.
The costs sit elsewhere:
Plain investing is not the lesser option. It is the better one in plenty of situations:
If several of these apply, investing directly, or simply paying the loan down, is usually the cleaner choice. Our comparison of debt recycling and extra repayments covers the pay-down route.
The case for recycling grows with three things: your tax rate, the size of your home loan and how long you will hold.
It also needs a stable income, a cash buffer and a lender whose splits and redraw suit the strategy. For high-income earners with a sizeable home loan, the deduction can be large enough to justify the setup and the record-keeping.
Many debt recycling plans also draw existing equity on day one, for example $100,000 invested at the start. That is no longer a like-for-like comparison. You hold more investments than your surplus alone would buy, and more total debt.
On the same assumptions, $100,000 at 6% costs about $6,000 a year in interest, with a deduction worth about $1,900 at 32%. The investments have to earn more than the after-tax cost to come out ahead, and in a market fall the loss is on borrowed money secured by your home.
Moneysmart puts it simply: borrowing to invest brings bigger returns when markets rise and larger losses when they fall. Whether that suits you is a question for your financial adviser.
We structure the lending, coordinate with your adviser and accountant, and tell you plainly when debt recycling is not the right fit.
Book a free call →The choice does not have to be all or nothing. Common middle paths:
Money taken from an offset and invested directly is your own cash, so it creates no deduction. It needs to go onto the loan and back out through the investment split for the interest to be deductible.
The offset-then-annual route keeps your savings reducing home loan interest for most of the year, gives you one clean drawdown to record, and lets you decide each year whether to recycle at all. For many households it is a simple way to test the strategy without changing how they invest month to month.
If the deduction would be worth little, or you value being able to stop at any time, investing from cash flow is the simpler path. If your tax rate, loan size and horizon line up, recycling the same money is the more tax-effective version of it.
The debt recycling calculator gives a quick estimate with your own figures. We check whether your loan can split cleanly and what it would cost to set up, and tell you if the setup costs look likely to outweigh the deduction.
Your financial adviser recommends the investments, and your registered tax agent confirms the tax treatment. We arrange the lending.
When you recycle the same surplus you would otherwise invest, mostly yes. You own the same investments and carry the same total debt. The extra steps, paying onto the loan and redrawing from a separate split, are what make the investment interest generally deductible. Whether those steps are worth it depends on your tax rate, loan size and horizon.
Not for your home loan interest. The home loan funded your home, so its interest is not deductible, even if you invest your spare cash instead of paying the loan down. Investment-related costs such as some account fees may be deductible in their own right. Your registered tax agent confirms what you can claim.
Recycling a regular surplus does not. You pay the home loan down and redraw the same amount to invest, so the total stays the same and only the mix changes. Drawing extra equity at the start does increase total debt and adds leverage, which is a separate decision to make with your financial adviser.
Yes. Many people invest directly first, then set up the loan structure once their income, mortgage size or tax rate makes the deduction worthwhile. Existing investments bought with your own cash stay as they are; only new money routed through the investment split creates deductible borrowing.
Often not at first. In our illustrative example, recycling $12,000 in year one creates a deduction worth about $230. The benefit builds as tranches accumulate, so it suits people who will keep going for many years. If setup costs, record-keeping and accountant time outweigh that, investing directly is simpler.
Written and updated byAlex GeeDirector & Mortgage Broker, Kingfisher Finance Group
Reviewed byJessica MaraisMortgage & Finance Broker, Kingfisher Finance GroupThe certainty of paying down against the upside of recycling.
Read more → GUIDEThe hurdle your returns need to clear.
Read more → CALCULATOREstimate the tax value with your own numbers.
Read more →
1. Arranged a loan when our small business situation made it difficult to qualify.
2. Met requirements to have funding available by a specified date.
3. Understood my needs to setup debt recycling to allow tax structuring.
4. Communicated well throughout.
I would use their services again.
Alex, Jess and the Kingfisher team were second to none and their process from start to finish was faultless. As a self-employed business owner, it can be difficult to obtain finance at the best of times. The Kingfisher team made this an easy and efficient proposition and their continued transparent and efficient communication ensured we were kept up to date at all times. Highly recommend them for your finance needs!
Alex and Jess dealt with our investment loan and provided a top tier service. They kept us up to date and communicated every step of the process making it a seamless and smooth experience! Awesome work team we will definitely be back for future loans!
Jess from Kingfisher was outstanding. I couldn't fault her communication, expertise or dedication to finding the best loan for our situation. The entire process was seamless from start to finish. We'll definitely be using Kingfisher again in the future. A top-tier organisation.
