If you already own property, another purchase is rarely funded from savings alone. More often it draws on equity you've built up — in your home, in an existing investment property, or across a portfolio of them. The instinct is to ask a single question: how much equity do I have? But that figure, on its own, tells you very little about what you can actually do with it.
The more useful question runs the whole way through: how much usable equity could I potentially access, where should that equity come from, and what happens to my overall debt and portfolio position if I use it to buy another investment property? This guide follows that progression from end to end.
The progression
Accessing equity is one way to fund portfolio growth. This guide focuses on that single decision in depth — the broader question of when and how to buy the next property is covered in the cornerstone, Growing Your Property Portfolio.
What is property equity?
Equity is the share of a property you own outright, rather than what the lender has a claim over:
Equity = Property value − Debt secured against the property
But not all of that equity is available to borrow against. It's worth separating two things:
Total equity
The full difference between the property's value and the debt against it. It's a measure of net worth in the property — not a measure of what you can borrow.
Potentially usable equity
The portion a lender might allow you to borrow against, once they keep a buffer between the total debt and the property's value. Always less than total equity.
Worked example
- Property value
- $900,000
- Existing loan
- $500,000
- 80% of property value
- $720,000
- Indicative usable equity
- $220,000
Here the total equity is $400,000 ($900,000 − $500,000), but the indicative usable equity is $220,000 — the gap between 80% of the value ($720,000) and the existing $500,000 loan.
The 80% figure is used here purely as an illustration. It is not a universal lending threshold. Actual accessible equity depends on lender policy, the recognised property value, serviceability and borrowing capacity, existing debts, loan structure and your circumstances. Calculating $220,000 of indicative usable equity does not mean you can necessarily borrow — or should borrow — $220,000.
Where can the equity come from?
Usable equity can sit in more than one place. The two most common sources behave differently, and the difference matters.
Equity in your principal home
You may have accumulated equity in the home you live in — by repaying the home loan, through increases in the property's value, or both. That equity can potentially be accessed to contribute toward the deposit and/or acquisition costs of another investment property.
The critical point: this is additional borrowing. You're not “withdrawing” equity like money from a bank account. Accessing home equity changes the debt position tied to your home, so it belongs in the picture of your overall financial position — not just the new property's.
Equity in your investment portfolio
Usable equity may instead sit within one or more investment properties. For investors with several properties, it can be spread across the portfolio — which raises a more sophisticated question: which property should the equity come from?
- Current property values
- Loan balances
- Property-level LVR
- Existing lending arrangements
- How much equity exists within each property
- The resulting debt position if equity is accessed
The takeaway isn't which source is “better” — it's that “I have $300,000 of portfolio equity” is not enough information on its own. Where it sits, and what accessing it does to each property, changes the decision.
When were your properties last valued?
How much equity is available depends materially on the value attributed to the property. So a question worth asking of each potential source is simply: when was it last valued?If a home or investment property hasn't been valued for several years, its current market value may differ materially from an older figure — in either direction.
Worked example — the same property, two valuations
Previous valuation
- Value
- $650,000
- Current loan
- $400,000
- 80% of value
- $520,000
- Indicative usable equity
- $120,000
If revalued higher
- Value
- $800,000
- Current loan
- $400,000
- 80% of value
- $640,000
- Indicative usable equity
- $240,000
The change in recognised value has doubled the indicative usable equity in this example — from $120,000 to $240,000 — without a single repayment being made. Which leads straight to the next question: what value will your lender actually recognise?
Will your lender recognise the valuation?
Your own estimate of market value, an online property estimate, an independent valuation, and a lender-recognised valuation are not necessarily the same number. Different lenders and markets may use different valuation approaches depending on the property and the lending request — which might include:
Thinking about getting your property revalued?
Before paying for an independent valuation, it can be worth asking your lender or mortgage adviser/broker:
- What valuation method they are likely to use
- Whether they will arrange the valuation
- Whether they will recognise an independently commissioned valuation
Paying for a valuation does not guarantee a lender will use it when assessing the property or determining accessible equity.
One more distinction worth keeping clear: an Akweno property estimate, HtAG data or any other third-party property estimate is a useful planning input, but it is nota lender-recognised valuation and shouldn't be treated as one.
Conduct an equity audit before looking for the next property
Before shortlisting the next purchase, it helps to take stock of what's actually available — and where it sits — across everything you own. A simple, repeatable audit:
- 1
Identify potential equity sources
List every property that might hold usable equity — your principal home, investment property 1, investment property 2, and so on.
- 2
Record current debt
Note the relevant current loan balance secured against each property.
- 3
Review current property values
Record the latest available valuation, or a reasonable current market estimate, for each one.
- 4
Check valuation recency
Ask when each property was last formally or lender valued. Flag any that haven't been valued within roughly the past three years, or where you don't know when the last valuation occurred. Three years isn't a regulatory or lender rule — it's simply a useful prompt to reassess whether an older figure still reflects the property's current position.
- 5
Check what your lender will recognise
Particularly before independently commissioning and paying for a valuation. The value you use and the value a lender recognises are not necessarily the same.
- 6
Estimate usable equity
Apply an appropriate illustrative LVR assumption to each source to estimate the equity that might potentially be usable.
- 7
Consider borrowing capacity separately
Having equity doesn't automatically mean you can borrow against all of it. Borrowing capacity is a separate question with its own inputs.
- 8
Model the resulting portfolio
If the equity is actually accessed and another property purchased, understand what happens to your overall debt, equity, LVR and cash flow.
Usable equity is not the same as borrowing capacity
These two are easy to conflate, and doing so leads to over-confident plans. They answer genuinely different questions.
| Concept | Usable equity | Borrowing capacity |
|---|---|---|
| The question it answers | How much additional lending might the property security potentially support? | How much additional debt might a lender be willing to provide based on your overall financial position and lending criteria? |
| Mostly driven by | Property value and the debt already secured against it. | Income, existing debts, living expenses, loan commitments, interest-rate assumptions, lender policy and other borrower-specific factors. |
| What it tells you | What the asset side could support in principle. | What you could actually service and be approved for in practice. |
You can have substantial property equity and still have limited ability to access it. Equity describes the security; borrowing capacity describes whether a lender will actually lend against it. A realistic plan needs both to line up.
How might equity fund the next property?
When equity does get used, it typically forms one part of the funding structure for the new property rather than the whole of it. Conceptually:
Equity borrowing
Additional borrowing secured against an existing property
New property borrowing
New borrowing secured against the property being acquired
Funding for the acquisition
Deposit, costs and purchase price combined
Acquisition costs and lending structures vary by market and by individual circumstances, so the exact split differs every time. The point to hold onto is that there are usually two pieces of additional borrowing to weigh — the loan against your existing property and the loan against the new one — not one.
What happens to your portfolio after you use the equity?
Most equity guides stop at “you have $X of usable equity.” That's the least interesting part. The decision that actually matters is what the whole portfolio looks like on the other side of the transaction. Here's an illustrative before-and-after.
Equity draw
- $150,000 accessed against an existing property
Purchase
- New investment property: $750,000
- Equity contribution: $150,000
- New property borrowing: ≈$600,000
Result
- Home + 3 investment properties
- A different leverage and risk position
Before
- Properties
- Home + 2 investments
- Total property value
- $2,400,000
- Total debt
- $1,200,000
- Total equity
- $1,200,000
- Portfolio LVR
- 50%
- Monthly cash flow
- +$450
After
- Properties
- Home + 3 investments
- Total property value
- $3,150,000
- Total debt
- $1,950,000
- Total equity
- $1,200,000
- Portfolio LVR
- ≈62%
- Monthly cash flow
- −$300
The investor hasn't simply “used $150,000 of equity.” They've changed the financing structure, leverage and risk position of their entire portfolio — total debt is up, portfolio LVR has risen, and monthly cash flow has moved from positive to negative.
Figures above are illustrative and rounded to show the direction of change, not a prediction for any specific portfolio.
Don't assess the new property in isolation
A prospective investment can look attractive analysed on its own and produce a materially different result once it's incorporated into an existing portfolio. Before treating the purchase as a standalone decision, it's worth asking:
How much additional debt will I have?
What happens to my overall portfolio LVR?
How much equity remains after the purchase?
What happens to portfolio cash flow?
How sensitive does the portfolio become to interest-rate changes?
Where is the equity contribution actually coming from?
How much liquidity or borrowing headroom remains?
Does the portfolio become more concentrated?
How does the new property change overall portfolio performance?
These are portfolio questions, not property questions — and they're exactly the kind of thing worth modelling as a scenario before committing, rather than discovering after.
Estimate your usable equity
Use this to get an indicative sense of the usable equity in a single property, and to see what accessing it would do to that property's debt and LVR. No login required.
Your numbers
Your best current market estimate for this property
Debt currently secured against this property
An illustrative assumption only — not a universal lending threshold. Actual accessible equity depends on lender policy, recognised value, serviceability and your circumstances.
Indicative usable equity
A$220,000
At an illustrative 80% LVR on the home value entered.
- Total property equity
- A$400,000
- Resulting debt if fully accessed
- A$720,000
- Resulting property LVR
- 80.0%
Figures update as you type. Indicative only — see the notes below the calculator.
Important — please read
- These calculations are illustrative only.
- Calculated usable equity does not constitute loan approval.
- The calculation does not assess your borrowing capacity.
- Actual lending criteria and acceptable LVRs vary by lender and market.
- Estimated property values may not be recognised by a lender.
- This is not financial or credit advice.
Finding the equity is only the first calculation.
The harder question is what a contemplated purchase does to everything you already own. Akweno lets you bring your existing properties and a prospective acquisition together and see how the whole portfolio moves — property values, debt, equity, LVR, cash flow, yield and overall investment performance — before you commit.
See how it fits the wider decision in Growing Your Property Portfolio.
Try the calculators
Equity forecast calculator
Project how a property's value and equity could grow over 10 to 20 years.
Open calculatorLVR calculator
Check a single property's loan-to-value ratio — the building block of usable equity.
Open calculatorRental yield calculator
Pressure-test price, rent and expenses on the property you're thinking of buying.
Open calculatorCash flow calculator
See what the next property adds to — or takes out of — your weekly position.
Open calculatorRelated guides
See it in Akweno
General information for property investors — not financial, credit, tax or legal advice.