Top Strategies to Structure Investment Loan Features

The right loan structure for an investment property depends on what you need the asset to do.

Interest-only periods, offset accounts, redraw facilities and split-rate structures each serve different purposes, and the combinations you select will shape your cashflow, tax position and capacity to add to your holdings over time. With significant changes to negative gearing and capital gains tax taking effect from 1 July 2027, the features you prioritise now matter more than they have in a decade.

Interest-Only Repayments and Cashflow Management

An interest-only loan requires you to pay only the interest charged each month, leaving the principal balance unchanged for a set period.

For an investor holding a property in Somerville and relying on rental income to cover the loan, an interest-only arrangement keeps monthly repayments lower during the initial holding period. That difference can be directed toward other uses such as offsetting debt on a primary residence, building a deposit for a second property, or covering holding costs during vacancy. In our experience, most investors in growth corridors along the Mornington Peninsula use interest-only terms to free up capital while the asset appreciates.

Consider a buyer who purchases a three-bedroom rental property and arranges a five-year interest-only term. Monthly repayments remain lower than a principal-and-interest loan on the same amount, and the difference is either saved or applied to offset the home loan. At the end of the interest-only period, the loan can be refinanced, extended, or converted to principal and interest depending on the investor's circumstances at that time. The outcome is greater flexibility and improved cashflow in the early years when it typically matters most.

Variable Rate, Fixed Rate or Split

A variable rate loan moves in line with market conditions and lender pricing decisions, while a fixed rate locks in a set rate for a defined period.

Most investors hold at least part of their loan on a variable rate to retain access to offset accounts and full redraw without restriction. Offset functionality is particularly valuable for investors because interest is calculated daily on the net balance, and every dollar in the offset account reduces the interest charged without affecting the deductibility of the loan. A fixed rate portion can provide certainty over repayments during periods of rate volatility, but it typically removes access to offset and may carry break costs if repaid early.

A split structure allows you to hold part of the loan on a variable rate and part on a fixed rate, giving you partial protection from rate increases while preserving offset access on the variable portion. In Somerville, where many buyers are also servicing a mortgage on their owner-occupied home, this approach allows them to direct surplus funds into an offset linked to the investment loan and reduce interest costs without compromising flexibility.

Offset Accounts and Tax-Deductible Interest

An offset account is a transaction account linked to your loan, and the balance in the account reduces the amount on which interest is calculated.

Because interest on an investment loan is generally deductible where the property is rented or held to produce income, reducing the balance through offset also reduces your deductible interest. For that reason, most investors use offset accounts linked to owner-occupied loans rather than investment loans, and direct surplus funds there first. If the investment loan carries a higher rate than the home loan, or if the investor has no owner-occupied debt, an offset on the investment loan can still be useful for managing short-term surplus or holding funds between purchases.

The calculation is straightforward. Interest charged on the loan is based on the daily balance after offset, so a loan of $500,000 with $30,000 in offset is charged interest on $470,000. The investor's deductible interest expense is reduced accordingly, but the cashflow benefit of lower repayments may outweigh the marginal reduction in tax deductions depending on the investor's marginal rate and overall position.

Redraw Facilities and Access to Extra Repayments

A redraw facility allows you to withdraw any extra repayments made above the minimum required amount.

Unlike offset, where funds remain separate and accessible at any time, redraw pulls money back out of the loan itself. That distinction matters for two reasons. First, redraw is typically subject to lender approval, minimum withdrawal amounts, processing times and sometimes fees. Second, withdrawing funds that have already reduced the principal can create complications for the deductibility of interest if the withdrawn amount is used for a private purpose rather than a further income-producing investment.

For investors holding property in Somerville and planning to acquire additional assets over time, redraw can provide a buffer if used carefully. However, the access is not as immediate or certain as offset, and the tax treatment requires attention. If you intend to use surplus funds to build a deposit for another investment property, holding those funds in offset rather than making extra repayments and relying on redraw is usually the clearer approach.

Portfolio Lending and Cross-Collateralisation

Portfolio lending allows you to use equity in one property as security for the purchase of another without selling or refinancing the first loan.

This arrangement can speed up borrowing capacity assessments and reduce upfront costs when acquiring multiple properties, but it also links your assets under a single security pool. That means the lender holds a charge over both properties, and selling or refinancing one property may require consent and trigger valuation or discharge processes across the portfolio. In a rising market, cross-collateralisation can be managed without issue, but in a softening market or if one property underperforms, it can limit your options.

Most brokers recommend keeping investment loans separate where possible, particularly when the properties are in different locations or serve different purposes within the investor's broader strategy. Somerville has seen steady demand from investors targeting long-term capital growth supported by the area's proximity to Frankston, Mornington and the planned Baxter train station, and many hold properties both on the Peninsula and in metro growth corridors. Maintaining separate loan facilities for each asset preserves flexibility and simplifies refinancing or disposal down the line.

Loan Structure and the 2027 Tax Changes

From 1 July 2027, net rental losses on residential properties acquired on or after 7:30pm on 12 May 2026 can only be offset against residential rental income or carried forward, not against salary or other income.

The change does not prevent you from claiming interest deductions or other rental expenses, but it quarantines the net loss if your rental income does not cover those costs. Properties held before that date, including those under contract before 7:30pm on 12 May 2026, continue under the existing rules until sold. Newly constructed dwellings that meet the definition of an eligible new build remain fully negatively geared even after 1 July 2027.

If you are acquiring an established property in Somerville after the threshold date and expect to run a net rental loss in the early years, the features you select become particularly relevant. Maximising offset on your owner-occupied debt rather than your investment loan, using interest-only terms to preserve cashflow, and ensuring your loan structure allows for future refinancing or portfolio expansion without triggering break costs or lender restrictions are all considerations that carry more weight in the new environment.

Lenders Mortgage Insurance and Loan-to-Value Ratio

Lenders Mortgage Insurance is a one-off premium charged when your loan exceeds 80 per cent of the property's value, and it protects the lender in the event of default.

For investors, LMI is calculated at a higher rate than for owner-occupiers, and the premium can be capitalised into the loan amount or paid upfront. Whether it makes sense to borrow above 80 per cent depends on your deposit, the property's projected growth, and whether you have other uses for those funds. In many cases, paying LMI to preserve capital for a second deposit or to offset debt elsewhere produces a greater return than waiting to save a larger deposit, but the decision should be modelled against your specific circumstances and holding period.

Somerville's median has moved in line with broader Peninsula trends, and most lenders will value properties in the area without issue provided comparable sales support the purchase price. If you are refinancing an existing investment loan and have built equity, moving to an 80 per cent loan-to-value ratio or below can open access to better rates and remove any remaining LMI burden from future top-ups or splits.

Prepayment and Break Costs on Fixed Rates

A fixed rate loan that is repaid in full or partially repaid above the allowable limit before the end of the fixed term may attract break costs.

These costs reflect the lender's cost of unwinding the fixed rate hedge, and they can be substantial if market rates have fallen since you fixed. The calculation is based on the difference between your fixed rate and the wholesale rate for the remaining fixed period, applied to the amount being repaid early. Most fixed rate products allow up to $10,000 or $30,000 in extra repayments each year without penalty, but selling the property or refinancing the full balance will typically trigger the break cost if done during the fixed term.

If you are considering a fixed rate portion on an investment loan, ensure the term aligns with your expected holding period and that you understand the conditions under which break costs apply. For investors in Somerville who may wish to sell or refinance within a few years to take advantage of equity growth or changing family circumstances, a shorter fixed term or a larger variable portion provides more flexibility without the risk of a significant exit cost.

The features you select should reflect the role the property plays in your overall position, the likelihood of future purchases or refinances, and the tax treatment that will apply both now and from mid-2027. Each loan is different, and the right structure depends on what you need the asset to do over the period you intend to hold it.

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