Avoid These Equity Calculation Mistakes When Refinancing

Your home equity is the difference between what your property is worth today and what you still owe on it.

That number determines whether you can refinance to a lower interest rate, release funds for another purchase, or consolidate debt into your mortgage. Getting the calculation wrong means you might miss opportunities or set expectations that can't be met when you lodge a refinance application.

How Lenders Calculate Usable Equity

Lenders don't let you borrow against 100% of your equity. Most cap lending at 80% of the property's current value, meaning your usable equity is 80% of the valuation minus your remaining loan amount.

Consider a property in Riverside valued at $650,000 with $420,000 still owing. At 80% lending, the maximum loan is $520,000. Subtract the existing debt and you have $100,000 in usable equity. If you need to access that $100,000 for a deposit on an investment property, the lender will let you refinance up to the $520,000 mark, releasing the difference as cash.

Some lenders will go to 90% or even 95% with lenders mortgage insurance, but the cost of that insurance often outweighs the benefit unless you're buying your next home and need every dollar for the deposit.

The Valuation Gap That Catches People Out

What you think your home is worth and what a lender's valuer says it's worth are often different figures.

A refinance application relies on a desktop or kerbside valuation, not a full inspection. If nearby sales are scarce or the valuer takes a conservative view, the figure can come in lower than expected. In areas like Prospect or Newnham, where stock turnover is slower, a $50,000 gap between your estimate and the bank's number isn't unusual. That gap shrinks your usable equity immediately, which can derail a plan to release funds or move to a loan with an offset account.

If you're refinancing primarily to access equity, ask your broker to order a pre-valuation before you commit to the application. It costs a few hundred dollars but removes the guesswork.

When Refinancing to Release Equity Makes Sense

Releasing equity works when the benefit outweighs the cost of increasing your loan amount.

In our experience, people refinance to release equity for three reasons: buying another property, funding renovations, or consolidating high-interest debt. Each scenario stacks up differently depending on your loan-to-value ratio and what you're borrowing against.

Consider a borrower with a home in Launceston's CBD valued at $580,000, owing $350,000. Usable equity at 80% is roughly $114,000. If that borrower wants to access $80,000 to put down a deposit on a second property, the new loan amount becomes $430,000. The interest rate on that $80,000 might sit around 6%, but the alternative, a personal loan at 9% or more, costs significantly more over time. The refinance process takes three to five weeks, and the borrower walks away with funds that can settle on the new purchase.

If the same borrower wanted to release $80,000 just to sit in an account, the math doesn't work. You're paying interest on money you're not using, and the offset account benefit doesn't cover the extra repayments on the larger loan amount.

Equity and Interest Rate Movements

Your equity position affects the interest rate you can access when refinancing.

Lenders price loans based on risk, and borrowers with more equity, meaning a lower loan-to-value ratio, typically qualify for sharper pricing. If your equity has grown since you first bought, either through paying down the loan or property value rising, you might now sit below 70% LVR instead of 85%. That shift can unlock rates that weren't available when you first borrowed, which is one reason a loan health check every couple of years makes sense, particularly if you're coming off a fixed rate period and your equity position has improved.

In Tasmania's regional markets, property values have moved unevenly. Some pockets around Launceston and Riverside have seen solid growth, while others have stayed flat. A property bought four years ago in South Launceston might now carry enough equity to refinance at a lower rate and pull out funds for another purpose, while a similar property elsewhere might still be close to the original purchase price.

Consolidating Debt Using Home Equity

Consolidating personal loans, car loans, or credit cards into your mortgage can reduce monthly repayments and simplify cashflow, but only if the total interest paid over the loan term doesn't increase.

A borrower with $30,000 in car and personal loan debt at an average rate of 8% might pay that off in four years with monthly repayments around $730. If they refinance and roll that $30,000 into a 30-year mortgage at 6%, the monthly repayment drops, but they'll pay interest on that $30,000 for three decades unless they make extra repayments. The lower interest rate doesn't automatically mean lower cost.

If you're going to consolidate into your mortgage, set up a redraw facility or offset account and keep making the same repayment amount you were making before. The debt clears faster, and you avoid paying home loan interest on what was originally a short-term obligation.

Calculating Equity After Renovations

Renovations increase your property's value, but lenders won't recognise that increase until a new valuation is completed.

If you've added a second bathroom or extended the living area, the equity you've created won't show up in a refinance application unless the valuer accounts for it. In some cases, the valuer will adjust for the improvements. In others, especially if the work was done recently and there are no comparable sales nearby, the valuation might not move at all.

Before refinancing to release equity after renovations, get a sense of what the work added. If you spent $60,000 on a kitchen and bathroom in Summerhill, the property value might lift by $50,000 to $70,000 depending on the standard of the finish and the local market. If the valuation doesn't reflect that, you might need to wait until a few similar properties sell before the lender recognises the uplift.

The Role of Offset Accounts in Equity Management

An offset account doesn't change your equity, but it does change how much interest you pay, which over time builds equity faster.

If you have $40,000 sitting in an offset account linked to your home loan, you're only charged interest on the net balance. That saves you thousands in interest each year and means more of your repayment goes toward reducing the loan amount. Over five years, that difference can shift your loan-to-value ratio enough to unlock lower rates when you refinance, or give you the usable equity needed to make another move.

Not every loan comes with an offset account, and not every lender prices them the same way. If you're refinancing and want to keep cash accessible without paying interest on it, make sure the loan structure includes a full offset, not a partial one or a redraw facility that limits access.

Call one of our team or book an appointment at a time that works for you. We'll calculate your usable equity, compare what's available across lenders, and build a refinance structure that lines up with what you're trying to do next.

Frequently Asked Questions