Everything You Need to Know About Owning Multiple Properties

Owning multiple investment properties means using equity from what you already own to fund deposits on additional properties while managing debt-to-income limits and lender serviceability buffers.

The carpentry work is steady, you've built equity in your first rental, and you're looking at property number two or three. The challenge isn't finding the next property. It's getting a lender to say yes without forcing you to offload an existing asset or lock yourself into a loan structure that caps your borrowing for the next decade.

Most carpenters we work with underestimate how quickly lender policy stacks up against you once you move past two properties. Every additional investment loan tightens the serviceability calculation, and every lender applies different buffers to rental income. Get the loan structure wrong on property two and you'll hit a ceiling before property three.

How Lenders Calculate Serviceability Across Multiple Properties

Lenders apply a 3 percentage point buffer to your current interest rate and assess rental income at 70 to 80 per cent of market rent, meaning they assume vacancies and holding costs eat the rest.

Consider a carpenter earning $95,000 annually who owns two investment properties generating $550 and $480 per week in rent. The lender takes 80 per cent of that rental income, then deducts the full loan repayments calculated at the current variable rate plus 3 per cent. If both properties are on interest-only loans at 6.5 per cent, the buffer rate becomes 9.5 per cent. That pushes assessed repayments well above what you're actually paying, which reduces how much the lender will approve for property three. One lender might assess rental income at 75 per cent while another uses 80 per cent. That 5 per cent difference can mean $50,000 to $80,000 in additional borrowing capacity when you're holding multiple properties.

Interest-Only Loans and How They Affect Portfolio Growth

Interest-only loans delay principal repayments for a set period, usually five years, which lowers your monthly outgoings and improves serviceability when applying for the next property.

If you're carrying three properties and all of them are on principal-and-interest loans, your monthly repayments will be higher than they need to be for assets you don't plan to live in. That eats into serviceability for property four. Switching to interest-only on your investment loans reduces repayments by 30 to 40 per cent during the interest-only period, which frees up cash flow and makes it simpler to pass serviceability tests with the next lender. When the interest-only period ends, you can refinance to another interest-only term or switch to principal-and-interest if you're no longer acquiring.

The downside is that you're not reducing the debt, so if property values stall or rental yields drop, you're holding the full loan balance with no offset from principal reduction. It's a tool for growth, not for paying down debt.

Equity Release and How Much You Can Access

Equity release lets you borrow against the value increase in a property you already own, but lenders cap the total loan-to-value ratio at 80 per cent for most investment borrowing, or 90 per cent if you're willing to pay Lenders Mortgage Insurance.

If your first investment property was purchased for $450,000 and is now valued at $580,000, you've got $130,000 in equity. At 80 per cent LVR, the lender will allow total borrowing of $464,000 against that property. If your remaining loan balance is $400,000, you can access up to $64,000 in usable equity. That's enough for a 10 per cent deposit on a $640,000 property, but you'll still need cash for stamp duty and settlement costs, which vary by state. Accessing equity doesn't require you to sell the property, but it does increase your loan balance and your monthly repayments, which tightens serviceability for future borrowing.

Some lenders will allow you to release equity and use it across state lines. Others restrict equity release to properties within the same state or postcode cluster, which can block your next purchase if you're targeting a different market.

What Changes From 1 July 2027

From 1 July 2027, rental losses on residential properties purchased after 12 May 2026 can only be offset against rental income or carried forward, not against your carpentry income.

If you buy an investment property now and it runs at a $6,000 annual loss after interest and expenses, you can claim that loss against your wage income and reduce your tax bill. If you buy the same property after 12 May 2026, that $6,000 loss is quarantined. You can't use it to reduce tax on your carpentry income. You can only offset it against future rental profits or capital gains when you sell. The exception is if you're buying a newly constructed dwelling on previously vacant land, or a property where the number of dwellings has increased. Those properties retain full negative gearing regardless of purchase date.

This doesn't affect properties you already own or those under contract before 12 May 2026. Those are grandfathered under the old rules. But if you're planning to add properties to your portfolio after mid-2026, the cash flow and tax position will be different unless you're targeting new builds.

Choosing Between Variable and Fixed Rates Across a Portfolio

Splitting your portfolio across variable and fixed-rate loans gives you flexibility to refinance part of your debt without triggering break costs, while still locking in certainty on a portion of your repayments.

If you fix all three properties at 6.2 per cent for three years and rates drop to 5.8 per cent twelve months later, you're stuck paying the higher rate or facing break costs that can run into five figures per property. If you keep one or two properties on variable rates, you can refinance those loans without penalty and take advantage of rate cuts or better lender terms as your portfolio grows. Fixed rates make sense when you want repayment certainty for budgeting, but they remove flexibility. Variable rates move with the market, which means your repayments can increase, but you're not locked in if you need to restructure or refinance mid-term.

Some carpenters fix their owner-occupied loan and leave investment loans on variable rates. Others do the reverse. The structure depends on whether you prioritise certainty or flexibility, and how soon you plan to acquire the next property.

Debt-to-Income Limits and the 20 Per Cent Cap

From 1 February 2026, lenders can only approve 20 per cent of new investor loans at a debt-to-income ratio of six times or higher, which affects high-income carpenters with large portfolios more than first-time investors.

If your total investment debt is $900,000 and your annual income is $140,000, your debt-to-income ratio is 6.4. That puts you in the restricted pool. The lender can still approve the loan, but only if you fall within their 20 per cent allocation for that quarter. If they've already hit their cap, they'll decline the application even if you pass serviceability. The cap doesn't apply to construction loans for new dwellings or to finance for newly built properties, which gives you an alternative path if you're targeting new builds as part of your property portfolio expansion.

This cap is applied separately to investor and owner-occupier loans, so it won't affect your ability to buy an owner-occupied property, but it does create an additional hurdle once your portfolio debt exceeds six times your income.

Rental Income Assessment and Vacancy Rates

Lenders assume rental income won't be constant, so they apply a shading rate of 70 to 80 per cent depending on their policy, and some lenders apply higher shading to properties in regional or oversupplied markets.

If your investment property generates $600 per week in rent, a lender using an 80 per cent shading rate will assess it as $480 per week of income. A lender using 75 per cent shading assesses it as $450 per week. That $30 per week difference equals $1,560 per year, which translates to roughly $30,000 to $40,000 in reduced borrowing capacity when the lender runs your serviceability calculation. Some lenders apply even lower shading rates to units in high-rise developments or to properties in towns with single-industry employment bases, on the assumption that vacancy risk is higher.

If you're holding multiple properties, the difference in shading policy across lenders can determine whether you're approved for the next loan or knocked back. It pays to know which lenders assess rental income more favourably before you lodge the application.

Lenders Mortgage Insurance on Investment Loans

Lenders Mortgage Insurance is charged when your loan-to-value ratio exceeds 80 per cent, and the premium increases significantly for investment loans compared to owner-occupied loans, especially on properties two and beyond.

LMI on an investment loan at 90 per cent LVR can cost $15,000 to $25,000 depending on the loan amount and lender. That's capitalised into the loan, which means you're paying interest on the insurance premium for the life of the loan. Some lenders offer LMI waivers for tradies on owner-occupied purchases, but those waivers rarely extend to investment loans. If you're using equity from property one to fund property two and you're borrowing above 80 per cent LVR, factor the LMI cost into your cash flow and return calculations before you proceed.

At 80 per cent LVR or below, LMI doesn't apply, which is why most portfolio investors target that threshold and cover the remaining 20 per cent through savings or equity release.

When to Refinance and When to Hold

Refinancing makes sense when you're offered a lower rate, better loan features, or when your current lender's serviceability policy is blocking your next purchase, but refinancing costs time and money, so the benefit needs to be tangible.

If your current lender is assessing rental income at 70 per cent and a new lender will assess it at 80 per cent, refinancing can unlock $80,000 to $100,000 in additional borrowing capacity without increasing your actual income or equity position. If your current loan has a rate discount that's no longer competitive, refinancing to a lower rate can save $3,000 to $5,000 per year per property, which compounds across a portfolio. The cost of refinancing includes application fees, valuation fees, and discharge fees from your current lender, which typically total $1,500 to $3,000 per property. If the benefit outweighs the cost within 12 months, refinancing makes sense. If the benefit is marginal, hold the current loan and wait until you're ready to acquire the next property, then refinance and purchase simultaneously.

Call one of our team or book an appointment at a time that works for you. We'll review your current loans, your borrowing capacity, and the lenders most likely to support the next property in your portfolio without forcing you into a structure that caps your growth two properties from now.

Frequently Asked Questions