Investment lending is a different discipline from owner-occupier lending. The interest rate matters, but the structure — how the loan is set up, secured and split — usually matters more to your long-term position. Get the structure wrong on property one and you can block your path to property two. Get it right and each purchase makes the next one easier.
This guide covers how investment loans differ, how to use equity as a deposit, the interest-only decision, and the structural traps we help investors avoid.
How investment loans differ from home loans
- Higher rates. Lenders price investment loans 0.2%–0.6% above owner-occupier rates, and interest-only repayments carry a further premium.
- Rental income counts — partially. Lenders typically credit 70%–90% of expected rent toward your serviceability, with each lender applying different shading. This is where broker lender-selection genuinely moves your borrowing capacity.
- The 3% buffer applies to everything. Under APRA's serviceability rules, lenders assess you at your rate plus 3% — on the new loan and on every existing debt. With the cash rate at 4.35% in mid-2026, assessment rates are demanding, and lender choice matters more than it did in the cheap-money years.
- Deposit expectations. Most lenders want 10%–20% for investment purchases; 20% avoids LMI. But most experienced investors don't use cash at all — they use equity.
Using equity instead of a cash deposit
If your home is worth $800,000 and your loan is $450,000, you have $350,000 in equity — of which roughly $190,000 is usable (the amount that keeps your home loan under 80% of value). Structured correctly, that usable equity becomes the deposit and purchase costs for an investment property, meaning you can buy without touching savings.
The golden rule: release the equity as a separate loan split, secured only against your home — don't let the bank cross-secure both properties under one facility. Same money, very different risk profile.
Why we avoid cross-collateralisation
Cross-collateralisation — one loan secured by two or more properties — is the default many banks quietly prefer, because it ties you to them. The problems surface later: selling one property requires the bank's consent and a revaluation of the others; a dip in one property's value can freeze your whole portfolio; and refinancing means moving everything at once. Standalone loans with separate equity splits achieve the same purchase with none of those handcuffs.
Interest-only or principal & interest?
Interest-only (IO) repayments maximise cash flow and keep funds available for the next acquisition, which is why many investors use IO periods of up to 5 years. The trade-offs: a slightly higher rate, no debt reduction, and a repayment jump when the IO period ends. P&I builds equity steadily and prices better. The right answer depends on your strategy — accumulating aggressively versus consolidating — and often changes over the life of the portfolio. Your accountant's view on deductibility should feed this decision too; we work alongside them rather than around them.
Structuring for the portfolio, not the purchase
A single-property decision — which lender, how much deposit, IO or P&I, whose name on title — looks different when you intend to own three or four properties. Concentrating all your lending with one bank hits that lender's exposure limits and pricing ceilings; spreading strategically across lenders preserves capacity. Similarly, ownership structure (individual, joint, trust, company) affects tax, land tax thresholds and asset protection — decisions to make with your accountant before contracts are signed, not after.
This is the core of what we do for investors: sequencing lenders and structures so that property three is still fundable when you get there.
What lenders look at in 2026
- Serviceability at buffered rates — your income, shaded rental income, and all existing commitments assessed at current rates plus 3%.
- Loan-to-value ratio — 80% keeps pricing sharp and LMI away; some lenders go to 90% for strong applicants.
- Portfolio exposure — total lending across all properties, including with other banks.
- Rental reliability — vacancy rates and rental evidence for the specific property and postcode.
Frequently asked questions
How much deposit do I need for an investment property?
Typically 10%–20% plus costs, with 20% avoiding LMI. Most investors fund this from home equity rather than cash — released as a separate loan split.
Can I use my home's equity to buy an investment property?
Yes — this is the most common path. Usable equity is generally property value × 80% minus your current loan, released as a standalone split to avoid cross-collateralisation.
Is interest-only still available in 2026?
Yes. Lenders offer interest-only periods, commonly up to 5 years, at a rate premium. Serviceability is assessed on the remaining P&I term.
Should I buy in a trust or my own name?
It depends on your tax position, land tax, asset protection and long-term plans. It's a joint decision with your accountant, made before signing contracts — we coordinate the lending side.
This guide is general information only and is current as at July 2026. It does not take into account your objectives, financial situation or needs, and is not credit advice or an offer of credit. Scheme rules, thresholds and price caps change — always confirm current details with Revenue NSW, Housing Australia, or speak with us before acting. Northstar Mortgage Advisory Pty Ltd, Credit Representative No. 579651, authorised under Australian Credit Licence 384324.