Common Mistakes with Investment Loan Structures

The loan structure you choose when purchasing an investment property shapes your tax outcome, borrowing capacity and ability to buy again.

Rosebud's coastal location and steady rental demand make it a practical option for property investors looking to build passive income. Whether you're considering a unit near the foreshore or a house closer to the Eastbourne Road shopping precinct, the loan structure you use will determine how much of your deposit stays accessible, how much interest you can claim, and whether you can borrow again without refinancing everything.

Interest Only or Principal and Interest for Investment Property

Interest-only repayments keep your monthly outgoings lower and preserve cash flow, which matters when rental income doesn't always cover the full loan cost. With an interest-only period, you're not reducing the loan balance, so the full interest charge remains deductible if the property is tenanted. Principal and interest repayments build equity faster but reduce the deductible portion of each payment over time, because part of what you're paying is loan reduction, not interest.

Consider a buyer who purchases a two-bedroom apartment in Rosebud with a loan amount of 80 per cent of the purchase price. They elect a five-year interest-only period. Monthly repayments sit lower than they would on principal and interest, and because the loan balance doesn't reduce, every dollar of interest paid remains a claimable expense. At the end of the interest-only term, they switch to principal and interest. By that point, rental income has increased and the repayment change is manageable. The structure gave them breathing room early, when cash flow mattered most.

Interest-only periods typically run between one and five years, depending on the lender. Not all investment loan products offer the same terms, and some require you to revert to principal and interest automatically. If you're planning to hold the property long-term and build equity, principal and interest from the outset makes sense. If cash flow is tight or you're managing multiple properties, interest-only can give you room to move.

Splitting Your Loan Between Fixed and Variable Rates

A split structure divides your loan amount into two portions: one on a fixed interest rate, the other on a variable rate. The fixed portion locks in your repayment for a set period, usually between one and five years. The variable portion moves with the market and lets you make extra repayments or redraw without penalty.

In our experience, investors who split their loans are looking for certainty on part of their repayment while keeping flexibility on the rest. If rates rise, the fixed portion stays unchanged. If they fall, the variable portion drops. You're not fully protected, but you're not fully exposed either.

A split also matters if you plan to use equity later. The variable portion can be redrawn or refinanced without triggering break costs, which gives you access to future equity without unwinding the whole loan. That's useful if you're planning to buy again or renovate.

Separate Loans for Each Property

Each investment property should sit on its own loan facility, not combined with your home loan or another investment property. Keeping loans separate preserves the deductibility of interest and makes it easier to sell or refinance one property without affecting the others.

When loans are cross-collateralised, the lender holds security over multiple properties under one credit contract. If you want to sell one property, the lender may require you to refinance the others or pay down part of the remaining debt. That slows down settlement and adds cost. Separate loans mean you can sell, refinance or restructure each property independently.

Deductibility also stays cleaner. If you redraw funds from an investment loan to pay for a holiday or a car, that portion of the interest is no longer claimable. If the loan is separate and used only for the investment property, every dollar of interest remains deductible as long as the property is tenanted or genuinely available for rent.

For Rosebud investors holding more than one property, keeping each loan standalone also makes portfolio growth more flexible. Lenders assess your borrowing capacity based on the debts you carry. If all your properties are tied together, refinancing one loan can mean reapplying for the entire portfolio. Separate loans mean smaller, faster transactions.

Offset Accounts and Investment Loans

An offset account linked to an investment loan reduces the interest you're charged, but it also reduces the amount you can claim as a deduction. Every dollar sitting in the offset lowers your loan balance for interest calculation purposes, which lowers your repayment but also lowers your claimable interest.

If your goal is to maximise tax deductions and you don't need daily access to surplus cash, an offset account on an investment loan works against you. You're better off keeping surplus funds in an offset linked to your home loan, where the interest isn't deductible anyway, and leaving the investment loan balance untouched so the full interest charge remains claimable.

That said, an offset can still be useful if you're holding cash for a future deposit or managing irregular income. The key is knowing what you're trading off. Lower interest costs now mean lower deductions later. If you're managing multiple properties or planning another purchase, structure your offsets and redraws carefully so you're not accidentally mixing personal and investment funds on the same facility.

Borrowing Capacity and Loan to Value Ratio

The loan to value ratio on your investment property affects whether you'll pay Lenders Mortgage Insurance and how much equity you'll have available later. A deposit of 20 per cent or more keeps your LVR at 80 per cent and avoids LMI. A smaller deposit pushes your LVR higher and adds an insurance premium to your upfront cost.

Lenders also assess rental income differently depending on your LVR. Most lenders apply a shading factor to rental income, typically around 80 per cent, to account for vacancy and maintenance costs. The higher your LVR, the more conservative the assessment. If you're borrowing at 90 per cent LVR, some lenders will reduce the rental income they're willing to count, which lowers your borrowing capacity for future purchases.

For buyers in Rosebud, where body corporate fees and coastal insurance premiums can be higher than inland suburbs, keeping your LVR at 80 per cent or below gives you more breathing room when lenders assess serviceability. It also means you'll have accessible equity sooner if property values rise, which matters if you're planning to leverage that equity into a second purchase.

Variable Rate Features That Matter for Investors

Most variable rate investment loans include a redraw facility, but not all redraws work the same way. Some lenders let you access extra repayments immediately through online banking. Others require a formal application and charge a fee. If you're planning to park surplus cash in the loan and pull it out later for another deposit, check how the redraw works before you settle.

Rate discounts on investment loans are typically smaller than on owner-occupied loans, and they're often linked to your LVR and loan amount. A loan amount above a certain threshold might unlock a deeper discount. Refinancing after your property increases in value can sometimes improve your rate, because your LVR drops and you may qualify for a different pricing tier.

Some lenders also offer portability, which lets you transfer your loan to a new property if you sell and buy again quickly. That's uncommon on investment loans but worth asking about if you're planning to trade up within a short timeframe.

Tax Changes from July 2027 and What They Mean for New Purchases

From 1 July 2027, rental losses on residential investment properties purchased after 12 May 2026 can only be offset against other residential rental income or carried forward. You won't be able to use a rental loss to reduce your salary or wage income unless the property qualifies as an eligible new build. Properties purchased before that date, or under contract before 7:30pm on 12 May 2026, continue under the existing rules.

For Rosebud buyers considering an established dwelling, this means negative gearing as a strategy has a deadline. If you purchase before 30 June 2027, you'll have a short window where losses can still offset other income, but from 1 July 2027 onward, those losses are quarantined. If you're comparing an established unit near the foreshore with a new build further inland, the tax treatment will differ depending on when you settle and whether the dwelling qualifies as new.

The capital gains tax discount is also changing. For properties purchased after 1 July 2027, the 50 per cent CGT discount is replaced with cost base indexation and a 30 per cent minimum tax rate on real gains. Eligible new builds retain access to the discount. If you're holding for long-term capital growth, the structure of the loan matters less than the timing and type of property you choose.

These changes don't affect the deductibility of loan interest, but they do change the value of structuring a loan to maximise deductions. If losses can't reduce your taxable income, the benefit of interest-only repayments or high LVR borrowing diminishes. You're still entitled to claim interest, but the cash flow benefit is delayed until you have other rental income to offset or until you sell.

How Loan Structure Affects Your Ability to Borrow Again

Every investment loan you hold reduces your borrowing capacity for the next one. Lenders assess your ability to service all existing debts, including investment loans, using a buffer rate that sits around 3 percentage points above the actual rate. Rental income is shaded, usually to 80 per cent, and your other commitments are added in.

If your first investment property is structured with principal and interest repayments and no offset, your committed monthly outgoing is higher than it would be on interest-only. That higher repayment reduces how much you can borrow for a second property. If you're planning to build a portfolio, structuring your first loan with interest-only repayments and a variable rate gives you lower serviceability costs and more flexibility when you apply again.

For Rosebud investors, this also means thinking about where your next purchase will be. If you're planning to buy interstate or in a higher-priced market, your borrowing capacity needs to stretch further. Structuring your Rosebud loan to minimise repayments and preserve equity access makes that second purchase more achievable. A loan health check before you start looking again can show you exactly where your capacity sits and whether restructuring your existing loan would help.

If you're ready to structure your investment loan in a way that supports your goals and keeps your options open, call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions