Simple hacks to calculate home equity for refinancing

What home equity actually means when refinancing

Equity is the portion of your property you own outright after subtracting what you owe on your mortgage. If your home is worth $650,000 and you owe $420,000, you have $230,000 in equity. When refinancing, lenders typically let you access up to 80% of your property's value without paying lenders mortgage insurance, which means your usable equity is lower than your total equity.

Consider a couple in Oakleigh who bought their townhouse four years ago for $580,000 with a 10% deposit. They now owe $485,000 and recent sales in their street suggest their property is worth around $680,000. Their total equity is $195,000, but their usable equity for refinancing purposes is calculated differently. At 80% of $680,000, the maximum loan amount a lender would typically approve is $544,000. Subtract their current debt of $485,000, and they have approximately $59,000 in usable equity they could access without paying lenders mortgage insurance.

How lenders value your property during refinancing

Lenders use their own valuation process rather than accepting your estimate or what you paid. They order a desktop valuation, kerbside assessment, or full valuation depending on the loan amount and perceived risk. Desktop valuations use recent sales data and automated models. A full valuation involves a physical inspection and detailed report. The valuation figure the lender accepts directly affects how much equity you can access.

In our experience, suburban Melbourne properties in established areas like Mount Waverley or Box Hill tend to receive consistent valuations because comparable sales data is plentiful. Properties in less active markets or those with unique features can return valuations below owner expectations, which reduces usable equity and sometimes derails refinancing plans that depend on accessing a specific amount.

The 80% lending threshold and why it matters

Most borrowers aim to keep their loan-to-value ratio at or below 80% to avoid lenders mortgage insurance. If your property is valued at $700,000, 80% is $560,000. If you currently owe $450,000, you could potentially borrow up to $560,000, giving you access to $110,000 in equity. Going beyond 80% is possible, but you'll pay lenders mortgage insurance on the amount above that threshold, which can run into thousands of dollars depending on the loan size.

Some borrowers choose to go to 85% or 90% if the equity they need justifies the insurance cost. In a scenario where you need $140,000 to purchase an investment property and your usable equity at 80% falls short by $30,000, you might decide the lenders mortgage insurance cost is acceptable compared to delaying the purchase. That decision depends on your financial position and what you're using the funds for.

Calculating usable equity step by step

Start with your property's current market value. Multiply that figure by 0.80 to find the maximum loan amount at 80%. Subtract your remaining mortgage balance. The result is your usable equity before accounting for refinancing costs like discharge fees, application fees, and valuation fees. Those costs typically range from $1,500 to $3,000 and reduce the net amount you can access.

If your property is worth $720,000, 80% is $576,000. You owe $390,000. Your usable equity is $186,000 minus refinancing costs. After allowing $2,500 for costs, you have approximately $183,500 available. If you're releasing equity to purchase another property, that figure determines your deposit size and whether you need to consider a low deposit loan for the new purchase.

When your equity calculation changes the refinancing approach

Sometimes the numbers reveal you don't have enough usable equity to achieve your goal at 80%, which changes the conversation. You might wait for further property value growth, make additional repayments to reduce your loan balance, or accept lenders mortgage insurance to access the funds now. Each option has trade-offs that depend on your timeline and what you're funding.

We regularly see borrowers who assume their equity position based on optimistic property values or who forget to account for refinancing costs. Running the calculation before committing to a purchase or renovation contract prevents difficult conversations later. If you're planning to access equity for investment or to consolidate debt, knowing your usable equity figure early shapes what's realistic.

Why your loan balance matters as much as property value

Property value gets most of the attention, but your remaining loan balance is equally important. Two neighbours with identical properties worth $650,000 will have vastly different usable equity if one owes $300,000 and the other owes $480,000. The first has roughly $220,000 in usable equity at 80%, while the second has $40,000. Regular repayments and offset account balances both reduce your loan balance and increase your equity over time.

If you've been making extra repayments or keeping savings in an offset account, your equity position improves faster than someone paying only the minimum. That difference compounds when you're refinancing to reduce your rate or access funds. Even a few years of consistent additional repayments can shift your equity from barely enough to comfortably covering your needs.

Call one of our team or book an appointment at a time that works for you. We'll run through your property value, current loan balance, and usable equity so you know exactly what you can access and what your refinancing options look like without guessing.

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