Everything You Need to Know About Investment Loans

Understanding Investment Loan Structure for Hills District Property

An investment loan is a mortgage secured against a residential property you intend to rent out rather than occupy. The lender assesses your ability to service the loan using rental income from the property, your existing income, and any other investment returns, then applies a serviceability buffer of at least 3.0 percentage points above the loan rate. In Baulkham Hills, where the median house sits around $1,995,000 and the median unit around $975,000, most investors borrow between 80 and 90 per cent of the purchase price, depending on whether they choose to pay lenders mortgage insurance or use equity from an existing property.

Consider a scenario where a dual-income household in Baulkham Hills owns a home valued at $1,800,000 with $600,000 remaining on the mortgage. They have $1,200,000 in usable equity and want to purchase a unit in Parramatta at the suburb's median of around $620,000. They could release equity to cover the deposit, stamp duty and settlement costs without needing to sell or disrupt their existing loan. The investment loan would then be structured separately against the Parramatta property, with interest and holding costs deductible against rental income of approximately $680 per week, which translates to a gross yield near 5.7 per cent. The rental income is assessed by the lender at a discount, typically 80 per cent of the stated market rent, to account for vacancy and maintenance periods.

How Recent Tax Changes Affect Property Acquired After May 2026

Properties purchased after 7:30pm on 12 May 2026 are subject to new negative gearing and capital gains tax rules that took effect from the 2027-28 income year. Losses on established residential investment properties acquired after that date can only be offset against income from other residential properties, not against salary or other forms of income. Losses that cannot be used in a given year are carried forward and remain available to offset future residential property income, including capital gains when the property is eventually sold.

New builds remain exempt. A dwelling constructed on previously vacant land, or a development that increases the number of dwellings on a site, retains full negative gearing treatment and continues to allow losses to be deducted against all income. A unit purchased off-the-plan in a new complex would qualify, but a knock-down rebuild that does not increase dwelling numbers would not. A new build that has been owner-occupied for more than 12 months before being sold loses the exemption for the next purchaser.

For capital gains, the 50 per cent discount on gains accruing before 1 July 2027 is preserved. From that date forward, gains on affected properties are calculated using cost base indexation and subject to a 30 per cent minimum tax rate on the real (inflation-adjusted) component. Properties owned before 1 July 2027 and sold after that date are taxed under both regimes, with gains split between the pre-July 2027 period (taxed under the old rules) and the post-July 2027 period (taxed under the new rules). Investors can obtain a market valuation as at 1 July 2027 or use an apportionment formula published by the ATO. New builds offer the option to choose between the 50 per cent discount and the indexed treatment at the time of sale.

Variable Rate Versus Fixed Rate for Investment Property Finance

Most investment property finance is written on a variable rate because it allows offset accounts, which can be particularly useful for investors who want to park rental income or surplus cash against the loan balance without triggering a principal reduction. Interest is calculated daily on the net balance, so every dollar in offset reduces the interest charged without affecting the deductible loan balance.

Fixed rates do not permit offset in most cases and carry break costs if you repay the loan or refinance before the fixed term ends. Break costs are calculated based on the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term. In a falling rate environment, break costs can run to tens of thousands of dollars. A split structure, where part of the loan is fixed and part is variable, allows some rate certainty while preserving access to offset and redraw on the variable portion.

For investors purchasing in Baulkham Hills or nearby suburbs, a variable rate also provides flexibility if you later decide to access equity for a second purchase or to refinance into a different product as your portfolio grows. Rental income can be directed into the offset account attached to the variable loan, reducing interest without reducing the deductible balance, and can be withdrawn when needed for maintenance, vacancy periods or further deposits.

Interest-Only Repayment Structure and Borrowing Capacity

An interest-only repayment structure allows you to pay only the interest portion of the loan for an agreed period, typically five years, with the option to extend or revert to principal and interest repayments at the end of that term. The loan balance does not reduce during the interest-only period, which means the full amount borrowed remains deductible and your monthly repayments are lower.

Lower repayments improve cashflow, which is particularly relevant in the Hills District where house rental yields sit between 2.2 and 2.9 per cent and most house purchases are negatively geared even after accounting for all deductible expenses. Consider a borrower who purchases a house in The Ponds at the suburb's median of around $1,650,000, borrowing $1,320,000 at 80 per cent LVR. Rental income of approximately $912 per week generates $47,424 per year. At current variable rates, interest on the loan would be around $79,200 per year, before adding council rates, insurance, property management and other holding costs. An interest-only structure keeps the repayment at $79,200 annually, whereas principal and interest repayments over 30 years would be close to $100,000 per year. The difference materially affects serviceability and borrowing capacity.

Lenders assess interest-only loans more conservatively than principal and interest loans. Under the prudential framework, interest-only loans attract higher risk weights, which flows through to pricing and policy. Some lenders cap interest-only lending at a lower LVR, commonly 90 per cent rather than 95 per cent, and most require a clear investment purpose and evidence of rental income or a lease agreement.

Loan to Value Ratio, Lenders Mortgage Insurance and Deposit Planning

The LVR is the percentage of the property's value that you borrow. An 80 per cent LVR means you provide a 20 per cent deposit plus costs. Borrowing above 80 per cent typically requires lenders mortgage insurance, which protects the lender if you default and the property is sold for less than the outstanding loan balance. The premium is paid by you, calculated on a sliding scale based on the loan amount and LVR, and can be capitalised into the loan or paid upfront.

LMI for a $780,000 loan at 90 per cent LVR on a Baulkham Hills unit valued at $975,000 would generally fall between $15,000 and $25,000 depending on the insurer and lender. Some lenders offer LMI waivers for certain professions, including doctors, dentists, accountants and lawyers, which can materially reduce the upfront cost of entering the market at a higher LVR. If you are eligible for a waiver, you can borrow up to 90 per cent without paying the premium, which preserves capital for settlement costs, retention of an emergency buffer, or a second deposit.

Deposit funds can come from savings, equity release, or a combination. Equity release involves borrowing against an existing property you own, either by refinancing that property to a higher balance or by taking out a separate loan secured against it. The equity loan is typically structured as a line of credit or separate split, with the funds drawn down at settlement of the new purchase. Using equity allows you to enter the investment market without selling an existing asset and without needing to accumulate a cash deposit over several years. It also means you can act quickly when an opportunity arises, which is relevant in the Hills District where stock suitable for investors, particularly well-located units near transport and amenities, can move within days of listing.

Tax Deductions, Claimable Expenses and Structuring for Long-Term Wealth

Interest on the portion of borrowings used to acquire or hold the investment property is deductible, along with council rates, water rates, strata levies if the property is in a body corporate, insurance, property management fees, repairs and maintenance, and depreciation on the building and fixtures. Loan establishment fees and LMI premiums paid can also be claimed, either in the year incurred or amortised over five years or the loan term, whichever is shorter.

Rental income must be declared in full, and deductions are claimed in the same financial year they are incurred. Where deductible expenses exceed rental income, the loss can be offset against other income for properties held before 12 May 2026 or acquired as new builds. For established properties acquired after that date, losses are quarantined and carried forward to offset future residential property income.

Baulkham Hills investors often structure their borrowing to preserve flexibility for future purchases. This means keeping the investment loan separate from the owner-occupied home loan, using interest-only terms where cashflow is a constraint, and ensuring any cash or offset balances are clearly attributed to the correct loan. Mixing purposes or cross-collateralising multiple properties can limit your ability to refinance, release equity, or sell one property without affecting the others. A clear structure also simplifies tax reporting and ensures you can substantiate deductions if reviewed by the ATO.

For investors focused on portfolio growth, the ability to leverage equity from one property into the next is a key driver of wealth accumulation over time. Each property purchased at a sustainable LVR, held through a full cycle, and supported by genuine rental demand contributes to both passive income and long-term capital growth. In the Hills District, unit stock in suburbs like Northmead and Parramatta offers stronger rental yields and lower entry prices than houses, which makes them more suitable for investors prioritising cashflow and faster equity accumulation. Houses in suburbs like Castle Hill and Bella Vista are oriented toward capital growth and suit investors with longer time horizons and the capacity to carry negative cashflow for several years.

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