Why Should You Plan Loans Before Buying Multiple Properties

Your first investment loan shapes how much you can borrow for your second and third. Lenders look at every debt you hold, so the way you set up the first purchase matters for everything that follows.

For Malvern locals thinking about adding to a portfolio, the useful question is not only "what can I borrow today?" It is "what will my position look like after each purchase?" A broker who looks at the whole sequence can help you avoid a first loan that quietly limits your next one.

How Do Lenders Assess Borrowing for Multiple Investment Properties?

Banks assess each new application against all your existing debts, and they test your repayments at a rate well above the loan's actual rate. APRA requires banks and other authorised deposit-taking institutions to assess new borrowers at a rate at least 3.0 percentage points above the loan rate.

That buffer applies to every new loan, so each added property tests your finances again. Your existing loans, credit card limits and any other commitments are all counted. Lenders ask about the interest rate, remaining term and balance on current debts, and they typically apply a notional repayment to credit cards based on the limit, not the balance.

APRA also has a debt-to-income limit in place from 1 February 2026. It applies to each bank's overall new lending, not to you as an individual. Each bank can lend only up to 20 per cent of its new mortgage lending at a debt-to-income ratio of six times or more. Non-bank lenders are not subject to the same limit, which is one reason a broker who can access lenders across Australia may find options that a single bank cannot offer. You can see how this plays out for your own figures on our borrowing capacity page.

How Much Rental Income Will a Lender Count?

Most banks count only part of the rent a property earns. APRA's view is that prudent lenders should count no more than 80 per cent of expected rent, which allows for periods when the property is empty.

That 20 per cent reduction is not for agent fees, repairs or other holding costs, so your real cash flow can be tighter than the lender's calculation suggests. Lenders also tend to rely less on a rental appraisal for a property you are about to buy than on actual rent already received. Each lender sets its own rules on what evidence it accepts, so the same property can produce different borrowing results at different banks.

This is why we map out each purchase in order. A lender that suits your first property may treat rent more cautiously than another lender would for your third.

Interest-Only or Principal and Interest: A Worked Example

An interest-only investment loan lowers your early repayments, but it does not increase how much you can borrow. Lenders assess an interest-only loan as if principal and interest repayments applied over the remaining term after the interest-only period ends.

Consider an investor who borrows $800,000 for a rental property. All figures here are illustrative and use a rate of 6.75% p.a. over a 30-year term.

• Principal and interest: about $5,189 a month from day one.
• Interest-only for five years: about $4,500 a month.
• After the interest-only period, principal and interest over the remaining 25 years: about $5,527 a month.

The investor chooses interest-only on this loan to keep cash flow comfortable while saving toward a second purchase. The outcome is a monthly saving of roughly $689 for five years. The trade-off is that the $800,000 balance has not reduced, and the later repayment is about $338 a month higher than the 30-year principal and interest figure. When the lender assesses the second purchase, it still counts that higher repayment.

Only the interest portion of a repayment is tax deductible, under either structure, and the principal portion is not. Speak with your accountant about how this applies to you. You can compare scenarios with our investment loans team.

What Do the Negative Gearing Changes Mean for Your Next Purchase?

The tax treatment of rental losses now depends on when you buy and what you buy. Losses on residential investment properties held at 7:30pm AEST on 12 May 2026 stay fully deductible against other income, and so do losses on eligible new builds acquired after that date.

For established residential properties bought after that time, net rental losses will be deductible only against other residential property income, including residential capital gains, from the 2027-28 income year. Excess losses can be carried forward. Properties bought between 12 May 2026 and 30 June 2027 can still use the current rules until 30 June 2027 only.

The change does not alter whether interest is deductible. It changes how a rental loss can be used. If your plan relies on a loss reducing your salary tax, the timing and type of the next purchase become part of the financing decision. Your accountant should confirm how the rules apply to your situation before you commit.

Using Equity to Buy the Next Property

You can borrow against the equity in your existing property to fund a deposit, but that choice affects both your risk and your tax position. Equity release increases your total debt, and each lender sets its own limits on how much it will release.

Borrowing above 80 per cent of a property's value generally requires lenders mortgage insurance, which is a cost paid by the borrower. Where loans are secured by the same property, the amounts are added together when the lender calculates the loan-to-value ratio. An offset account balance does not reduce the loan amount for this calculation.

Tax follows the use of the money, not the property that secures it. Funds drawn to buy a rental property can generate deductible interest, while funds used for private purposes cannot. Mixing the two in a single loan account makes your records harder to keep and your deductions harder to prove. Keeping the investment borrowing in its own loan split is a sensible habit, and your accountant can advise on the detail.

If an existing loan is limiting your next move, a refinance or a loan health check can show where the room is. We work with Malvern locals through our Malvern office, and we take the long view on each portfolio.

Call one of our team or book an appointment at a time that works for you, and we will map out your next purchase before you make an offer.

Frequently Asked Questions