You own a home loan and a rental loan, and every spare dollar has two places to go. Which debt to attack first, why the non-deductible one usually wins, and the 2026 change that can reverse the order.
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Two loans, two interest rates and only one of them is subsidised by the tax system. Four things decide which balance to attack:
Interest on your home loan is paid with money you have already been taxed on and buys nothing back. Interest on the loan against your rental is generally deductible, so the tax system funds part of it at your marginal rate.
A dollar of home loan interest costs a full dollar. A dollar of investment loan interest costs a dollar less your marginal rate, which, for someone on 39% including the Medicare levy, is about 61 cents. Repaying the more expensive debt removes more cost.
Extra repayments on your rental loan shrink a deduction you already hold. The interest falls, the claim falls with it, and the tax benefit you were counting on gets smaller every year you keep going.
Less debt against the rental means lower repayments, less exposure if rates rise and a property closer to funding itself. Households under cash flow pressure sometimes take that trade knowingly. That is a cash flow decision, not a tax one.
Paying down the home loan does more than remove expensive interest. It creates the room to re-borrow through a separate split and invest, which turns the balance you just cleared into deductible debt.
Nothing equivalent exists on the rental side. Money redrawn from an investment loan is judged on what you use it for at the moment you draw it, so pulling it back out for anything private makes that portion non-deductible and leaves the account mixed for the life of the loan.
Recycling converts debt without adding any. You pay $30,000 off the home loan, you draw $30,000 through the investment split, and the combined balance is exactly where it started.
What does change is risk. Borrowed money moves out of bricks and into market-linked assets, and a fall in the portfolio leaves the loan behind it untouched. That is the real cost of the conversion.
The figures below are illustrative and use 2026-27 resident rates including the 2% Medicare levy. Assume a household on a 39% marginal rate, a home loan at 6.20%, an investment property loan at 6.55%, a new investment split priced at 6.45% and $50,000 of surplus cash to place:
| Where the $50,000 goes | Interest removed or added | Deduction at 39% | After-tax effect for the year |
|---|---|---|---|
| Off the home loan | $3,100 removed | None lost or gained | $3,100 saved |
| Off the investment property loan | $3,275 removed | $1,277 lost | $1,998 saved |
| Off the home loan, then re-borrowed as an investment split | $3,100 removed and $3,225 added | $1,258 gained | $1,133 saved, plus a $50,000 portfolio |
Illustrative only and a general guide. Lender pricing, your marginal rate and the rental's own position will each move these figures, and none is a forecast or a promise of any result.
Clearing home loan principal returns 6.20% after tax with no market exposure. The recycled route gives up $1,967 of that in after-tax interest on the new split, which is 3.93% of the $50,000, so the portfolio has to clear roughly 3.9% a year after tax before recycling is ahead of paying the home loan down.
Set against paying down the rental loan, the bar is far lower. That option saves $1,998 with certainty, and the recycled route saves $1,133 with certainty plus whatever the portfolio produces, so about $865 a year, or 1.7% on the invested amount, closes the gap.
Neither hurdle is a prediction. A portfolio can sit below both for years while the loan behind it keeps charging interest.
The $1,102 a year separating the first two rows is the cost of paying the wrong loan on these assumptions. Across a decade of steady surplus, that gap compounds into a material difference in when the home loan clears. The same arithmetic sits behind debt recycling versus extra repayments on a single mortgage.
The gap narrows as your marginal rate falls. At 30% plus the levy, the after-tax cost of the rental loan rises to about 4.5%, and at 17% including the levy it rises to about 5.4%, closing on the home loan without quite passing it at these rates.
The rule holds while the deduction on the rental is worth its full marginal value and the household can comfortably carry both structures. Six situations undo one of those conditions or both:
Most people who already hold a rental are unaffected. Under the 2026 Budget tax reform measures, existing arrangements are preserved for residential property held, or under contract, before Budget night, and investors who buy eligible new builds keep the ability to deduct losses against other income.
The exception under the 2026 negative gearing changes is established residential property bought after 7:30pm AEST on 12 May 2026. From 1 July 2027, net rental losses on those properties are deductible against residential property income or a capital gain on residential property, with any unused amount carried forward instead of reducing wages.
Where a property in that category already runs at a net rental loss, an extra repayment reduces interest that was producing no current-year deduction anyway. The after-tax cost of that debt moves back towards the full 6.55%, above the home loan, and the usual order reverses. The deduction is deferred and not destroyed, so the real question is timing, and it belongs with your registered tax agent.
At 17% including the levy, interest on a recycled split costs about 5.35% after tax, so the portfolio has to beat that before the strategy improves on a repayment carrying no market exposure.
The sequencing answer itself does not change at low rates, because the home loan still costs more after tax than the rental loan. What changes is whether the conversion step earns the volatility it adds.
Interest-only periods end, and the loan reverts to principal and interest over the remaining term. On a $460,000 investment loan at 6.55%, repayments move from roughly $2,510 a month to $3,120 on a 25-year reversion, and that increase is compulsory in a way extra repayments never are.
Committing surplus cash to a new split in the months before that date leaves less room to absorb it. Confirming the reversion date first and sizing the split around the higher repayment keeps both structures serviceable.
Debt recycling suits a long horizon, because the deduction accrues slowly and the portfolio needs time to compound. A rental you expect to sell inside a few years changes what the surplus is for, since the sale proceeds will clear that loan anyway.
Selling also brings capital gains tax (CGT) into view. The 50% discount is being replaced with a discount based on inflation, alongside a minimum 30% tax on gains arising from 1 July 2027, so the timing of a sale is work for your accountant and not a lending decision.
A negatively geared rental already consumes cash before any recycling starts. Adding an investment split adds interest immediately and returns income later, so the months in between come out of the buffer.
Where that buffer would not cover several months of repayments on both loans with the rental sitting vacant, the sequencing question is premature. Building the buffer first is the answer, even though it earns less than either repayment would.
You can only recycle what you pay down, so a home loan close to zero has very little left to convert. Households in that position usually end up comparing the rental loan against investing the cash outright.
Clearing the home loan entirely also removes the facility the strategy runs through. Where more recycling is intended, the split is worth establishing while the balance still supports it.
Tax settles what you should do. Lending settles what you can do, and a second property narrows both sides of that:
Usable equity is generally the property value taken to an 80% loan-to-value ratio (LVR) less the current balance, and most lenders go beyond that only where lenders mortgage insurance applies. A rental bought recently can absorb most of that equity.
The home usually carries the recycling split, because it is the cleanest security available and keeps the new account away from the property loan. The equity needed to start depends on the size of the split you want and the balance you are prepared to leave untouched.
Lenders assess a new split at your actual rate plus a buffer, which the Australian Prudential Regulation Authority (APRA) has kept at three percentage points. A split at 6.45% is tested near 9.45%, and the existing rental loan is tested the same way whether or not the rent covers it.
Rental income is usually shaded as well, commonly to around 80% of the gross figure. The property contributes less on an application than it does in your bank account.
From 1 February 2026, APRA limits lenders to writing no more than 20% of new mortgage lending at a debt-to-income (DTI) ratio of six times gross income or above, measured separately across owner-occupier and investor portfolios. The cap sits on the lender, not on you.
Two properties push many households towards that threshold, so which lender you approach can matter as much as what you earn. Where a current lender cannot produce the split, refinancing to a lender that can will not add to the total owed.
Where the home and the rental secure each other, releasing equity from one usually means the lender revalues both and reassesses the combined LVR, so a new split can end up secured over the entire package. That complicates every later move, including selling either property.
Separating the securities before recycling costs an application and some time. It is far cheaper than unwinding a cross-collateralised structure after a split has been built on it.
Sequencing is a series of checks, and each one can change the answer to the next:
A statement shows an account labelled as an investment loan. It does not show whether that account has stayed pure, and a single private redraw years ago is enough to make part of the balance non-deductible.
Confirming the position with your accountant before you place a dollar avoids optimising a deduction that is smaller than the paperwork suggests.
Three to six months of repayments across both loans, held in offset against the home loan, is a common starting point for households running two properties. Offset keeps the money reachable and reduces non-deductible interest.
A buffer built inside the investment split is not a buffer. Every withdrawal from it is fresh borrowing judged on its purpose at the time, and living costs have never been an investment purpose.
With the buffer set and the deductible balance confirmed, surplus goes to the home loan first in most cases.
Whether that repayment then becomes a recycled split is a separate decision, made on your timeframe and your tolerance for market risk, not on the tax result alone.
A mortgage broker structures the splits and confirms the lender will produce them. A registered tax agent confirms the purpose test is satisfied and that the tracing is documented. A licensed financial adviser selects the assets and matches them to your timeframe and tolerance for risk.
The gap between the two after-tax costs moves with interest rates, with your marginal rate and with the rental's own income. A promotion, a vacancy or a fixed term expiring can each change which loan should be receiving the surplus.
Reviewing once a year, and again after anything material, keeps the order current without turning it into a monthly decision.
The figures and timeframes above are a general guide only. Lender policy, buffer expectations and what suits a household all vary, and your own position should be confirmed with your broker and your accountant.
Most people arrive at this question having already sent years of surplus somewhere, and quietly worrying it was the wrong somewhere. Very few have done any damage. Money paid off the rental reduced real debt, and money paid off the home loan is still sitting there as usable equity, waiting to be converted.
What changes from here is that the next dollar has a reason behind it, and that reason holds until your rate, your income or the rental's position actually changes. That is enough to stop the decision being reopened every time a bonus lands.
The one piece worth settling early is capacity, because equity, serviceability and the DTI position decide whether the recycled route is open to you, and only a lender can confirm those.
Kingfisher Finance Group can model a split against your home loan, rental loan and equity, then show what the sequencing is worth over the term you have left. The free calculator gives an estimate to take to your accountant and financial adviser before any surplus moves.
Book a free call →Usually only once the non-deductible debt is gone, or where the cash flow case is compelling on its own. Extra repayments on a rental loan reduce a deduction you already hold and produce a smaller after-tax saving than the same dollar aimed at your home loan. Where the rental is a strain on the household budget, reducing that loan is a reasonable call. Making the reason explicit keeps it from being mistaken for a tax decision.
The facility may allow it, but the deductibility of the redrawn amount depends on what you use it for at the moment you draw it. Redrawing to buy income-producing assets generally supports a deduction. Redrawing for a car, a holiday or work on your own home does not, and it leaves the account mixed in purpose, with the interest apportioned for as long as the loan exists.
No. The deduction on the rental follows the borrowing behind it and the income the property produces, and repaying your home loan changes neither. What can change it is the 2026 negative gearing restriction, which applies to established residential property bought after 7:30pm AEST on 12 May 2026 and takes effect from 1 July 2027.
The interest deduction still applies against the rental income, and the quarantining rules only bite where there is a net rental loss to quarantine. A positively geared property adds assessable income to your return, which can lift your marginal rate and make a deduction on a recycled split worth slightly more. The sequencing logic is unchanged.
Not through the home, where no equity is left to release. A split can sometimes be written against the rental instead, though the purpose test still governs deductibility and the accounts need to be kept separate from the outset. A broker can confirm what your current lender will allow before you plan around it, because policy on splitting and redraw varies widely between lenders.
No. Recycling converts debt you already owe. The amount repaid off the home loan is the amount re-borrowed through the split, so the combined balance across the three accounts is the same the day after as the day before. What increases is the share of that debt which is deductible, along with your exposure to market movements on the invested portion.
That is an investment question for a licensed financial adviser and a tax question for a registered tax agent, because a sale triggers CGT and the treatment of gains arising from 1 July 2027 is changing. From the lending side, selling clears the investment loan and frees equity, which can leave a cleaner starting point. It also ends a deduction that is already running, so both sides need to be on the table before anyone lists the property.
Which does more with the same dollar.
Read more →ServiceStructuring around an existing rental.
Read more →UpdateWhat the changes mean for the strategy.
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