Do you know how much equity you can actually use?

Most property owners know they have equity, but few understand how much of it they can actually deploy.

Usable equity is not the difference between what you owe and what your property is worth. Lenders restrict how much of that equity you can access, and the calculation involves loan-to-value ratios, borrowing capacity, and whether the property is your home or an investment. Getting this calculation right before you approach a lender changes the conversation from speculative to strategic.

How lenders calculate your usable equity

Lenders will typically allow you to borrow up to 80% of your property's value without requiring lender's mortgage insurance. Your usable equity is the difference between that 80% threshold and your current loan balance. If your property is valued by the lender at $800,000 and you owe $500,000, the calculation looks like this: 80% of $800,000 is $640,000, minus the $500,000 you owe, leaving $140,000 in usable equity. That figure assumes you have sufficient borrowing capacity to support the additional lending, which is a separate constraint applied after the equity calculation.

The 80% threshold exists because lenders want a buffer against market downturns and valuation risk. Going beyond 80% means you will pay lender's mortgage insurance, which can add thousands to your upfront costs and is rarely the right move for investors building a portfolio. Some lenders will approve lending to 90% or even 95% in specific circumstances, but those scenarios usually involve higher interest rates, restricted product features, and reduced serviceability.

The property valuation determines everything

Your property's market value matters less than the lender's valuation. Lenders use their own valuation process, often relying on desktop assessments, automated valuation models, or kerbside inspections rather than full appraisals. These methods can produce figures that differ from what a real estate agent estimates or what comparable sales suggest. A desktop valuation on a property you believe is worth $900,000 might come back at $850,000, which reduces your usable equity by $40,000 overnight.

Consider a scenario where an investor in Brisbane owns a property they purchased five years ago for $650,000. They have paid the loan down to $480,000 and expect the property to be worth around $850,000 based on recent sales in the area. When they apply to access equity for their next purchase, the lender's desktop valuation returns a figure of $800,000. At 80% of $800,000, the maximum lending is $640,000. Subtract the $480,000 owed, and usable equity sits at $160,000. That is $40,000 less than expected, which might mean the difference between a 20% deposit on a $700,000 investment property and needing to either save more, choose a lower-priced property, or accept lender's mortgage insurance.

If the valuation comes in lower than anticipated, you can request a full appraisal, though this adds time and cost to the process. Some lenders will reconsider if you provide evidence of comparable sales or recent improvements, but there is no guarantee they will adjust the figure.

How your home differs from an investment property

The way lenders treat equity release depends on whether the property is owner-occupied or held as an investment. For your home, lenders are generally willing to approve equity access at 80% without lender's mortgage insurance, assuming your borrowing capacity supports it. If you are using that equity to purchase an investment property, the assessment remains straightforward because the purpose aligns with wealth creation and the lender can see a clear exit strategy.

When the property you are refinancing is already an investment, lenders apply the same 80% threshold but may price the loan differently. Investment lending attracts slightly higher interest rates than owner-occupied lending, typically between 0.20% and 0.50% higher depending on the lender and loan structure. This difference affects your serviceability calculation, which in turn affects how much you can borrow against the equity. If you are refinancing multiple investment properties at once to consolidate debt or release equity to fund the next purchase, the cumulative rate difference and serviceability impact become material.

Another factor is how the lender assesses rental income. Most lenders will only count 80% of the gross rental income when calculating serviceability, which reduces the amount you can borrow compared to what the property actually generates. If your investment property produces $600 per week in rent, the lender will assess it as $480 per week, which might limit how much additional equity you can access even if the loan-to-value ratio permits it.

Borrowing capacity is the second constraint

Accessing equity is not just about the loan-to-value ratio. You also need to prove you can service the additional debt. Lenders assess your income, existing debts, living expenses, and any other financial commitments to determine your borrowing capacity. If your income does not support the increased loan amount, the lender will not approve the equity release regardless of how much equity exists on paper.

In our experience, this is where many investors encounter resistance. They have the equity, the valuation supports it, and the loan-to-value ratio is within limits, but their current income and expense profile does not leave enough headroom for the lender to approve additional borrowing. This happens frequently when investors have increased their living expenses, taken on new personal debt, or seen their rental income decline due to vacancy or rent reductions.

Running a borrowing capacity assessment before you start the refinancing process clarifies whether the constraint is equity or serviceability. If the issue is serviceability, the solution might involve increasing your income, reducing discretionary expenses, paying down high-interest debt, or restructuring existing loans to improve cashflow. If the issue is equity, you are looking at either waiting for capital growth, making additional principal payments, or accepting lender's mortgage insurance to access more than 80%.

Refinancing to access equity versus a standalone equity loan

You can access equity by refinancing your existing loan or by taking out a separate equity loan that sits alongside your current mortgage. Refinancing consolidates everything into one loan, which can simplify repayments and often provides access to improved interest rates or loan features. A standalone equity loan, sometimes called a line of credit or split loan, allows you to keep your existing mortgage unchanged while drawing on the equity separately.

Refinancing makes sense when your current loan is no longer aligned with your needs, whether due to a higher interest rate, limited features, or an upcoming fixed rate expiry. If your current loan sits at a rate that is 0.50% or more above what is available in the market, refinancing to access equity while simultaneously reducing your rate can improve cashflow and accelerate portfolio growth. The downside is that refinancing involves a full application, new valuation, and potentially break costs if you are exiting a fixed rate early.

A standalone equity loan works when your existing loan structure is already performing well and you want to avoid resetting your loan term or paying discharge and application fees. The equity loan can be interest-only and offset-enabled, giving you the flexibility to draw funds as needed without disturbing the primary loan. The trade-off is that you now manage two loans, two sets of fees, and two interest rates, which adds complexity to your portfolio.

Why cash reserves matter after accessing equity

Once you have accessed equity and deployed it into your next investment, your borrowing capacity reduces and your debt servicing obligations increase. This is not inherently problematic, but it does reduce your financial flexibility in the short term. If an unexpected expense arises, or if one of your properties experiences a prolonged vacancy, you need cash reserves to cover the shortfall without defaulting on loan repayments.

We regularly see investors access every dollar of available equity and deploy it immediately, leaving no buffer for interest rate rises, maintenance costs, or periods without rental income. A more resilient approach involves accessing equity but holding a portion in an offset account or other liquid structure so it remains available if needed. This approach also preserves your borrowing capacity for future purchases because the lender can see that you have cash reserves and are not fully leveraged.

The offset account attached to the equity loan allows you to reduce interest on the borrowed funds while keeping the capital accessible. If you draw $150,000 in equity and place $30,000 in an offset, you only pay interest on $120,000 while retaining liquidity. The $30,000 can be deployed later once the portfolio stabilises, or it can sit as a buffer for the next 12 to 18 months.

When refinancing to access equity does not make sense

Not every scenario justifies refinancing to access equity. If your current loan is on a competitive rate with flexible features and you do not have an immediate use for the equity, refinancing introduces cost and effort without delivering a tangible benefit. Application fees, valuation fees, discharge fees, and potential break costs can total several thousand dollars, which erodes the value of accessing equity unless the purpose is income-generating or strategically necessary.

Another scenario where refinancing may not be appropriate is when your borrowing capacity is constrained to the point that accessing equity would push your serviceability to its limit. Lenders assess your ability to service debt at a higher interest rate than the actual loan rate, typically adding a buffer of 2.5% to 3%. If your income barely supports the additional borrowing at that buffered rate, you may be approved but left with no capacity for future purchases or rate rises. In that situation, waiting to increase income or reduce other debts might be the more strategic decision.

If you are considering accessing equity purely to invest outside property, such as in shares, business ventures, or other assets, lenders will assess the application differently. Some will not lend for those purposes at all, while others will require detailed business plans, financial statements, or higher interest rates. The lending criteria and risk appetite vary significantly across lenders, so structuring the application correctly from the outset determines whether it proceeds or stalls.

Call one of our team or book an appointment at a time that works for you to review your equity position, run the calculations specific to your properties, and structure the refinancing or equity access in a way that supports your next investment decision without compromising your portfolio's resilience.

Frequently Asked Questions