When to Borrow for an Established Investment Property

Negative Gearing Rules Change From July 2027

If you settle on an established investment property after 30 June 2027, you will not be able to offset a net rental loss against your salary or business income. Losses will be quarantined and can only be used to reduce other rental income or carried forward to offset future rental income or capital gains when you sell. This applies to established dwellings acquired after 7:30pm on 12 May 2026. Properties acquired before that date, including those under contract awaiting settlement at that time, continue under the current rules indefinitely.

The change matters in Mandurah because many buyers have been purchasing older villas and units in areas like Meadow Springs, Halls Head and Lakelands, holding them at a small loss for a few years, then claiming that loss against wages. From mid-2027 onward, that structure stops working for new purchases unless you are buying a newly built dwelling that increases housing supply.

Consider a buyer looking at a two-bedroom unit in an older complex near Mandurah Forum. Weekly rent sits around $420. Interest on a loan at current variable investor rates, plus strata fees, council rates and landlord insurance, might push annual costs to $28,000 while rent brings in $21,800. Under the old rules, you could claim the $6,200 shortfall against your wage. Under the new rules, if you settle after 30 June 2027, that $6,200 sits in a separate account and can only reduce tax when you receive other rental income or sell the property.

Some investors will still proceed because they are buying for long-term capital growth and the loss is manageable from cash flow. Others will need to reconsider deposit size, loan structure, or property selection to reduce or eliminate the annual shortfall. The timing of contract and settlement now determines which set of tax rules applies for the life of your ownership.

Lender Serviceability and the Debt-to-Income Cap

Banks assess your ability to repay an investment loan by adding a three-percentage-point buffer to the product rate and deducting all existing debts from your income. From February 2026, lenders also apply a debt-to-income cap that limits total borrowing to six times gross annual income for no more than twenty per cent of new investor loans in any quarter.

In practice, the serviceability buffer binds more often than the DTI cap for most Mandurah buyers. Rental income is shaded to eighty per cent of market rent to allow for vacancy and collection risk. If you already carry a home loan, car finance, or investment debt, the new loan reduces what remains available for living expenses. Lenders want to see a clear surplus after all commitments are covered at the buffered rate.

Consider a couple earning a combined $140,000 who own their home in Greenfields with $380,000 remaining on the mortgage. They want to borrow $450,000 to purchase a villa in Falcon. The lender will assess the home loan and the new investor loan simultaneously, shade the forecast rent, and apply the buffer. Even though the rent covers most of the new loan cost at the actual rate, the buffered cost often exceeds the shaded income, leaving a serviceability gap. Increasing the deposit to $500,000 borrowed, or reducing other debts before applying, often resolves the shortfall without needing a higher income.

If the DTI cap does apply, you may be referred to a lender with available capacity in that twenty per cent allocation, though those lenders typically price the loan higher or require a larger deposit to offset the concentration risk. Most buyers in the Mandurah market do not hit the cap unless they are building a portfolio quickly or carrying significant non-mortgage debt.

Interest-Only Periods and Principal Reduction

Most investor products allow interest-only repayments for up to five years, reverting to principal-and-interest afterwards. Interest-only lowers the monthly cost and can improve cash flow in the early years, particularly if you are holding the property at a loss. The offset is that you do not reduce the loan balance during that period, and the repayment increases when the interest-only term ends.

Interest deductibility depends on the loan purpose, not the repayment type. Both interest-only and principal-and-interest investment loans allow you to claim the interest portion as a deduction, provided the borrowing was used to acquire or hold the rental property. If you later redraw funds or refinance for a private purpose, that portion loses deductibility even if the security remains the investment property.

Some borrowers prefer principal-and-interest from the start to build equity faster and avoid the repayment step-up at year five. Others use interest-only and direct surplus cash flow into an offset account linked to their owner-occupied loan, reducing non-deductible interest while preserving the full deduction on the investment side. The right structure depends on your other debts, tax position, and whether you expect income or expenses to change materially over the next few years.

Fixed or Variable Rate for Investor Loans

Investor variable rates are typically priced fifteen to thirty basis points above equivalent owner-occupier variable rates. Fixed rates for investors carry a similar margin. The choice between fixed and variable depends on your tolerance for repayment changes and your view on rate direction, not on tax treatment, because both structures allow the same interest deduction.

Variable rates allow unlimited extra repayments into an offset account without penalty, which preserves flexibility if your circumstances change or if you want to use surplus rent to reduce other debt. Fixed rates lock in the cost for the agreed term but generally prohibit offset accounts and cap extra repayments at $10,000 to $30,000 per year. Breaking a fixed rate early can trigger substantial costs if wholesale rates have moved against you.

Some borrowers split the loan, fixing a portion for certainty and leaving the balance variable for flexibility. A typical split might be sixty per cent fixed for three years and forty per cent variable with full offset. The structure suits buyers who want repayment stability during the interest-only period but also want the option to pay down the variable portion if rental income exceeds expectations or if they refinance other debt and redirect cash flow.

If you expect to sell or refinance within two to three years, a variable rate avoids the risk of break costs. If you are holding long-term and want to fix borrowing costs while negative gearing is quarantined, a fixed term aligned to your cash flow forecast can make budgeting more predictable, provided the rate margin justifies the loss of offset access.

Loan-to-Value Ratio and Lenders Mortgage Insurance

Most lenders will lend up to eighty per cent of the property value for an established investment purchase without requiring Lenders Mortgage Insurance. Borrowing above eighty per cent attracts LMI, which is a one-time premium added to the loan amount to protect the lender if you default. The premium increases sharply above ninety per cent LVR and some lenders cap investor lending at ninety or ninety-five per cent regardless of willingness to pay the premium.

LMI premiums for investor loans are higher than for owner-occupiers at the same LVR because the lender's loss experience is worse when a rental property is sold under duress. At eighty-five per cent LVR, the premium might add $8,000 to $12,000 to a $400,000 loan. At ninety per cent, the premium can exceed $20,000. The premium is not refundable if you repay early, and it is not a deductible cost in the year it is capitalised, though you may be able to claim it over five years or on sale, depending on your structure and advice from your accountant.

If you have equity in your home, many lenders allow you to use that equity as additional security rather than paying LMI on the investment loan. The home is cross-collateralised with the investment property, lifting total security above the amount borrowed and keeping each individual loan below eighty per cent of its own property value. The trade-off is that both properties are now tied to the same lender, which can limit flexibility when refinancing or selling one asset. Structuring the loans separately from the start, even if it means paying a small LMI premium, often provides more options later if your strategy or circumstances change.

Deposit and Upfront Costs in Mandurah

Buyers typically need a ten to twenty per cent deposit, calculated from the purchase price, plus stamp duty and settlement costs held in cash or drawdown from another property. Stamp duty on investment property in Western Australia is calculated on the same schedule as owner-occupied residential property, without the First Home Owner concessions. For a property purchased in the Mandurah region, stamp duty on a $450,000 transaction is approximately $16,500. Add to that conveyancing, building and pest inspection, loan application fees, and initial landlord insurance, and you should budget another $3,000 to $5,000 in upfront settlement costs.

Lenders require evidence that your deposit is genuine savings, equity drawdown, or a permitted gift. Genuine savings means funds held in your name for at least three months in a standard savings account, term deposit, or offset account. If you are using equity from your home, the lender will revalue your property or accept a desktop valuation and approve an increased limit on that loan, with the released funds transferred to your solicitor at settlement. Mixing genuine savings with a small equity drawdown is common and usually straightforward, provided total borrowing across both loans remains within serviceability.

If you are purchasing through a family trust or company structure, lender requirements and deposit rules can differ. Most retail lenders will assess the loan on an individual guarantor basis, requiring personal income and asset disclosure even when the entity is the borrower. The deposit must be sourced from the entity or the guarantor's own funds, and stamp duty may be calculated at trust or corporate rates depending on the structure, which are higher than individual residential rates for certain transaction values.

When Refinancing an Existing Investment Loan Makes Sense

Many Mandurah investors who purchased three to five years ago are still on rates that are fifty to one hundred basis points above current offers. Refinancing can reduce your interest cost, release equity for further investment, or switch from interest-only to principal-and-interest if your cash flow has improved. The key decision is whether the rate saving and any equity release outweigh the discharge fees, application fees, valuation costs, and potential loss of existing features such as a redraw facility or offset account.

If your current loan has a redraw balance or offset balance, make sure the new structure replicates that facility. Some lenders do not offer offset accounts on investor loans, or they reserve them for packages that carry a higher annual fee. Losing offset access can cost more in lost interest savings than you gain from a lower headline rate, particularly if you are holding surplus rent or other cash in that account.

Refinancing is also the moment to review your loan-to-value ratio. If the property has increased in value since purchase, your LVR has fallen, which may qualify you for a lower rate tier or allow you to remove LMI from the loan if it was originally above eighty per cent. Lenders will order a new valuation as part of the refinance process. If the valuation comes in below your expectation, you may need to reduce the amount you release or accept a higher rate, so it pays to have a realistic view of current market value in your suburb before applying.

Capital Gains Tax and Cost Base Indexation From July 2027

Under the changes that take effect from 1 July 2027, the fifty per cent CGT discount on residential investment property is replaced with cost base indexation and a minimum thirty per cent tax rate on real gains. The new rules apply only to the portion of the gain that accrues after 1 July 2027. Gains that accrued before that date continue to be taxed under the current discount method.

In practical terms, if you buy in late 2026 or early 2027 and hold for ten years, most of the gain will be taxed under the indexed cost base and minimum rate. If you already own the property, gains up to 30 June 2027 remain under the discount method, and only appreciation after that date is subject to the new calculation. Newly built dwellings that qualify for negative gearing also retain an election between the fifty per cent discount and the indexed cost base with minimum rate, giving those properties a structural tax advantage at both the income and capital gains stage.

The capital gain is calculated when you sell or otherwise dispose of the property. If you hold the property for many years and inflation is moderate, indexation may produce a similar or lower tax result than the fifty per cent discount. If inflation is high or your marginal rate is above thirty per cent, the minimum rate can reduce your tax on the gain. The interaction between quarantined losses, carried-forward rental losses, indexed cost base, and the minimum rate is complicated and specific to your circumstances, so this is one area where advice from an accountant with investment property experience is worth the cost before you buy.

Rental Income and Vacancy Assumptions

Lenders use eighty per cent of market rent when assessing serviceability, regardless of the actual lease or your property manager's appraisal. That twenty per cent reduction accounts for vacancy, arrears, and periods between tenancies. If you are comparing two properties and one commands $500 per week while the other achieves $450, the lender will assess $400 versus $360, and that $40 difference flows through to how much you can borrow or how much surplus income you need to demonstrate.

Mandurah's rental market has pockets of strong demand, particularly for modern villas and townhouses within walking distance of the Mandurah Ocean Marina and the foreshore, where tenant retention is high and vacancy periods are short. Older strata units further from the water, particularly those without airconditioning or with dated interiors, can sit vacant for longer and attract tenants who move frequently. The lender does not adjust the eighty per cent assumption based on property quality, but your actual cash flow will, so it pays to factor in realistic holding costs when you model the annual return.

If you are purchasing with a tenant already in place, the lender will sight the lease and use the actual rent or eighty per cent of market rent, whichever is lower. A lease at $430 per week when market rent is $480 will be assessed at $384, which can reduce serviceability compared to a vacant property where the lender assumes the full market rate shaded to eighty per cent. Purchasing with a lease in place can be an advantage if you want immediate cash flow, but it can also be a disadvantage at assessment if the lease is below market or has a short remaining term.

Portfolio Lending and Serviceability Across Multiple Properties

If you already own one or more investment properties, each additional purchase is assessed on your total debt position, not just the new loan. The lender will include all existing investment loans, your home loan, and any personal debts when calculating serviceability. Rental income from all properties is shaded to eighty per cent and added to your wage or business income, and all loan repayments are calculated at the buffered rate.

In our experience, borrowers hit serviceability limits around the third or fourth property unless they have above-average income, minimal owner-occupied debt, or rental income that consistently exceeds buffered loan costs. Mandurah investors who started with a single unit or villa and want to build a portfolio often need to pay down their home loan or increase equity in existing investment properties before they can borrow for the next acquisition. Releasing equity from an existing investment property to fund the deposit on a new one increases total debt, which works against serviceability, so the strategy only succeeds if the new property's rental income adds more to assessed income than the new loan adds to assessed repayments.

Some lenders offer portfolio discounts on rate or fee once you hold multiple investment loans with them, but those discounts are rarely large enough to offset the advantage of splitting your properties across different lenders for refinancing flexibility. If all your properties are with one lender and that lender tightens policy or you have a serviceability issue on the next purchase, you have limited options. Structuring each property with a different lender from the start takes more effort during the purchase phase but provides materially more flexibility when you want to refinance, sell one asset, or access equity later.

We work with buyers across Mandurah who are purchasing their first investment property or adding to an existing portfolio, and the lending landscape has tightened noticeably since the DTI caps and tax changes were announced. What worked eighteen months ago often does not work now without adjusting deposit size, loan structure, or property selection. Call one of our team or book an appointment at a time that works for you, and we will walk through your income, existing commitments, and the numbers on the property you are considering, so you know what is possible and what structure makes sense before you make an offer.

Frequently Asked Questions