Investment Loans: What Not to Overlook When Buying

If you're buying an investment property as a builder, the loan you choose will determine how much cash you keep in your pocket each month and how much equity you can pull out later.

The difference between a property that drains your cash flow and one that funds the next deposit comes down to loan structure, not just the rate. Builders often assume their income makes approval straightforward, but lenders assess investment loans differently to owner-occupied lending. Your ability to service the debt depends on rental income projections, not just your wage, and that changes what you can borrow and how much deposit you'll need.

Investment Loan Deposit Requirements for Builders

Most lenders require a minimum 10% deposit for an investment property loan, but you'll pay Lenders Mortgage Insurance (LMI) on any loan to value ratio above 80%. LMI on an investment loan can add thousands to your upfront costs, and unlike owner-occupied lending, there are fewer LMI waivers available for investors.

Consider a builder purchasing an investment property who has 15% deposit saved but wants to borrow 85% to keep cash aside for settlement costs and initial maintenance. That 5% gap between 80% and 85% LVR triggers LMI, which could add another $8,000 to $12,000 depending on the loan amount. The lender also applies a rental income discount, typically 20%, meaning they only count 80% of the expected rent when assessing your ability to repay. If the property is expected to rent for $500 per week, the lender will assess it as $400 per week. That discounted figure, combined with your existing debts and living expenses, determines how much you can borrow.

If you're planning to use equity from your owner-occupied property to fund the deposit, you'll need a valuation that supports the amount you want to release. Lenders won't let you borrow against unrealised gains without proof.

Interest Only Repayments vs Principal and Interest

An interest only loan lets you pay just the interest portion of the loan for a set period, usually one to five years, which keeps your repayments lower and improves short-term cash flow. This structure suits investors who want to maximise tax deductions or free up cash for additional deposits, but it doesn't reduce the loan amount.

Principal and interest repayments build equity from day one. You're paying down the debt each month, which means you'll own more of the property over time, but your repayments will be higher. For a builder holding a property long-term with the intention to eventually live in it or sell down the line, principal and interest makes sense. For someone building a portfolio and planning to leverage equity within a few years, interest only keeps more cash available now.

The choice between the two depends on your tax position and whether you're planning to hold or trade. If you're in a high tax bracket and the property is negatively geared, interest only maximises the deduction. If you're holding for capital growth and want to build equity to release later, principal and interest is the play. Most lenders will let you switch from interest only to principal and interest during the loan term, but not the other way around without a full reassessment.

Variable Rate vs Fixed Rate on Investment Loans

A variable rate moves with the market, which means your repayments can go up or down depending on what the Reserve Bank does. A fixed rate locks in your repayment for one to five years, which gives you certainty but removes flexibility if rates drop.

Variable rates on investment loans are currently sitting higher than fixed rates in most cases, but that gap shifts. The benefit of a variable loan is flexibility. You can make extra repayments without penalty, redraw funds if the loan allows it, and refinance without paying break costs. Fixed rates cap your repayments, but if you need to sell or refinance early, you'll wear break costs that can run into thousands.

Some investors split the loan, fixing a portion for certainty and leaving the rest variable for flexibility. That structure works if you want to lock in part of your repayment but keep access to redraw or offset on the variable portion. If you're planning to use equity within the next two years to fund another deposit, a variable loan gives you more room to move without penalty.

How Lenders Assess Rental Income on Investment Loans

Lenders don't take your rental estimate at face value. They'll either use a percentage of the rent you nominate or order their own valuation, which includes a rental assessment. That rental figure is then discounted by 20% to account for vacancy and maintenance costs.

If you're buying in an area with high vacancy rates or limited rental demand, the lender may apply a higher discount or reduce the amount they're willing to lend. Builders working in regional areas sometimes assume their local knowledge will carry weight, but lenders rely on their own data. If the postcode shows a vacancy rate above 3% or limited comparable rentals, the serviceability calculation tightens.

You'll also need to show that you can service the loan without the rental income for at least three months. That means your wage, existing debts, and living expenses are all part of the calculation. If you're carrying a car loan, personal loan, or credit card limit, those commitments reduce how much you can borrow even if the investment property is expected to cover its own costs.

Structuring the Loan for Tax Deductions and Portfolio Growth

How you structure the loan affects what you can claim and how much equity you can access later. If you're using equity from your home to fund the deposit, that portion of the loan needs to be split and kept separate. Only the portion used to purchase the investment property is tax deductible. Mixing the two in one loan account means you'll have trouble proving the deduction if the ATO asks.

Debt recycling is another consideration. If you're planning to pay down non-deductible debt on your home and replace it with deductible investment debt over time, the loan structure needs to support that from the start. A loan with offset and redraw won't give you the same flexibility as a split loan with separate accounts.

For builders planning to expand their portfolio, keeping equity accessible is the priority. That means holding the loan at 80% LVR or below, keeping the structure clean, and ensuring you can prove serviceability for the next purchase. If your first investment property is structured poorly, it limits how much you can borrow on the second.

Investment Loan Application: What Lenders Want to See

Lenders treat investment loan applications differently to owner-occupied lending. They want to see proof of genuine savings, proof of rental income if you already own an investment property, and a clear exit strategy if the property doesn't perform.

For builders, proving income can be more involved. If you're operating through a company or trust, the lender will ask for two years of financials, a current profit and loss statement, and a letter from your accountant. If you're on a wage, payslips and tax returns are usually enough, but if you've recently changed employers or taken on contract work, the lender may average your income or apply a loading.

You'll also need to show that you can cover the deposit, stamp duty, and settlement costs without borrowing further. If you're using equity, the lender will want a paper trail showing where the funds came from. If you're using savings, they'll check that the money has been in your account for at least three months. Recent cash deposits or transfers from a third party will trigger questions.

Most lenders will also run a rental appraisal as part of the valuation. If the property is off-the-plan or not yet tenanted, they'll base the assessment on comparable rentals in the area. If the rental appraisal comes in lower than expected, your borrowing capacity drops.

What Changed in the Federal Budget and What It Means for You

If you bought an investment property before 12 May 2026, your tax treatment is largely unchanged. If you're buying an established property from 13 May 2026 onwards, the way capital gains tax and negative gearing work will shift from 1 July 2027.

Under the new rules, losses from established residential properties purchased after Budget night can only be offset against rental income or capital gains from residential property. You won't be able to claim the loss against your wage. Excess losses can be carried forward, but the immediate tax benefit disappears.

The 50% CGT discount is also being replaced with an inflation-based discount and a minimum 30% tax on capital gains. If you're buying a new build, you'll be able to choose between the old 50% discount or the new inflation-based method, whichever works in your favour. Established properties don't get that choice.

For builders, this changes the numbers. If you're buying an investment property to offset taxable income, an established property purchased now won't deliver the same benefit from mid-2027. If you're buying for long-term capital growth and planning to hold for ten years, the CGT changes are something to model with your accountant before you commit.

Call one of our team or book an appointment at a time that works for you. We'll help you structure the loan properly from the start so it doesn't limit what you can do next.

Frequently Asked Questions