You may be able to use equity in your home or another property to help fund the deposit for an investment property in New Zealand.
However, equity is not cash sitting in a bank account. Accessing it normally means taking out additional lending secured against an existing property.
The amount of equity shown on paper may also be very different from the amount a lender considers usable. Having enough usable equity does not automatically mean you can afford the additional borrowing.
Before relying on equity for another purchase, you need to establish:
This guide explains how usable equity may be calculated, how equity-supported lending may be structured and what lenders consider before approving an investment-property purchase.
Yes. Usable equity in an existing property may provide some or all of the contribution required to buy an investment property.
For example, a lender may approve additional borrowing against your existing home. That lending may be used toward the investment-property deposit, while an investment-property mortgage funds the remaining purchase price.
This does not mean you are buying an investment property with “no money” or receiving free funds. Using equity normally increases your total debt.
The lender must be satisfied that:
Equity can create a potential lending pathway. It is not an approval by itself.
These terms are related but not interchangeable. A borrower may have substantial total equity but limited usable equity, or enough usable equity but insufficient borrowing capacity.
| Term | What it means |
|---|---|
| Total equity | The property’s value minus the lending secured against it |
| Usable equity | The portion of that equity potentially available within lender and LVR limits |
| Borrowing capacity | The amount the lender considers affordable after assessing income, expenses, debts, rent and other criteria |
Total equity
Assume your home is worth $900,000 and the mortgage secured against it is $500,000.
$900,000 property value − $500,000 mortgage = $400,000 total equity
However, this does not mean you can automatically borrow the full $400,000.
How to Calculate Indicative Usable Equity
A simple initial formula is:
Permitted lending against the existing property − current lending secured against it = indicative usable equity
| Calculation | Amount |
|---|---|
| Current home value | $900,000 |
| Illustrative 80% lending boundary | $720,000 |
| Existing lending secured against the property | $500,000 |
| Indicative usable equity | $220,000 |
The homeowner has $400,000 in total equity, but this simplified calculation indicates that $220,000 may potentially be usable.
Current secured lending may include the mortgage balance, revolving-credit limits, existing top-ups and any other facilities secured against the property.
An unused revolving-credit facility or other secured limit may therefore affect the calculation even where the full limit has not been drawn.
Important: This is an estimate, not a loan approval.
The amount actually available may be lower because:
If the property providing the equity is itself an investment property, a different LVR boundary may apply.
Where the existing home and investment property are used together as security, the lender may also assess the combined position differently from a simple 80% calculation on the home alone.
A person can therefore have substantial total equity but limited borrowing capacity.
Angela Downie, Financial Adviser, Platinum Mortgages explains:
“A client I worked with believed she had about $155,000 of equity available to use toward an investment property. Once we worked through the lender’s usable-equity position, the amount potentially available was closer to $24,000.
Rather than letting her start house hunting based on the larger figure, we put a plan in place to reduce the mortgage further and strengthen the property position first.”
An online estimate may suggest you have plenty of equity, but it does not show how much a lender will accept or whether you can afford the resulting debt.
Platinum Mortgages can review the likely property value, secured lending and borrowing position before making an unconditional commitment to an investment property.
TALK TO AN INVESTMENT PROPERTY ADVISER
Platinum Mortgages first reviews the likely lender-acceptable value and all secured lending. We then calculate indicative usable equity and assess whether the resulting debt is affordable.
Once the contribution requirement is understood, we compare lender and security options and work towards suitable approval before the client commits unconditionally. The loan splits, security and repayment structure are then finalised before settlement.
An early approval confirms only the position assessed at that stage. The lender may still need to approve the particular investment property, valuation, insurance and any remaining conditions.
The amount of equity you may be able to use depends on:
Under the current Reserve Bank settings, owner-occupier lending above 80% LVR is classified as high-LVR, while investor lending above 70% LVR is classified as high-LVR.
Banks may currently use up to 25% of new owner-occupier lending for loans above 80% LVR and up to 10% of new investor lending for loans above 70% LVR. These are bank portfolio restrictions—not individual borrower entitlements—and banks can apply stricter criteria.
If you apply for additional lending against the property, the lender may reassess:
An 80% calculation can therefore be useful as an initial illustration for an owner-occupied home, but it is not a universal entitlement or final lending figure.
Usable equity depends on the value accepted by the lender—not simply:
Depending on the application, a lender may use:
A lower accepted value can materially reduce the amount of indicative usable equity.
| Accepted property value | Illustrative 80% boundary | Existing lending secured against the property | Indicative usable equity |
|---|---|---|---|
| $900,000 | $720,000 | $500,000 | $220,000 |
| $850,000 | $680,000 | $500,000 | $180,000 |
A $50,000 reduction in the accepted property value reduces the indicative usable equity in this example by $40,000.
This is why it is important to establish a realistic lender-acceptable value before relying on an equity figure.
Once the indicative usable equity is known, it must be compared with the contribution required for the proposed investment property.
For example, $220,000 of indicative usable equity may appear sufficient, but the actual position still depends on:
For detailed guidance on investment-property deposit requirements and lower-deposit pathways, see our guide to investment property deposits in New Zealand.
There is no single structure that is right for every investment-property purchase.
| Structure | How it generally works | Main consideration |
|---|---|---|
| Top-up or separate equity loan | Additional lending is created against the existing property, often in a separate loan account. | The top-up must pass valuation, LVR and affordability assessments. |
| Same-bank structure | The existing home and new investment lending are held with one bank. | This may be simpler, but the bank may hold security over both properties. |
| Separate-bank structure | Different lenders may fund or hold security over separate parts of the transaction. | This may reduce cross-security but can involve additional conditions, costs and complexity. |
| Cross-collateralisation | More than one property secures the lending. | This may affect flexibility when selling, refinancing or changing lenders. |
The appropriate option depends on:
Accessing equity and deciding how the investment-property mortgage will be repaid are related but separate decisions.
For a broader explanation of how lenders assess an investment-property application, including servicing, rental income, property acceptability and approval considerations, see our guide to investment property mortgages in New Zealand.
Angela Downie adds:
“I worked with a client who owned several investment properties, all financed with the same lender and cross-collateralised. Although the client had built up substantial equity, having all of the properties tied together reduced their flexibility when they wanted to borrow again, restructure or potentially sell an individual property.
Working with the client and their accountant, we refinanced and restructured the lending across more than one lender where appropriate. The important lesson is that getting an approval is only the first step. The way the lending is structured can affect how much flexibility you have later.”
The largest available equity figure is not always the most suitable lending structure.
Platinum Mortgages can compare usable equity, lender options and security arrangements before you commit to the purchase.
Talk to an Investment Property Adviser
No, not necessarily.
The bank holding your current home loan may provide the additional equity lending while another lender funds the investment property. In other situations, keeping the existing and new lending with one bank may be simpler or more practical.
The most suitable structure depends on:
Using the same bank is not always best, and neither is splitting the lending between banks.
The structure should be considered before the loans are documented rather than after the purchase has settled.
Having enough usable equity does not guarantee that the investment-property mortgage will be approved.
The lender will also assess:
DTI can also affect borrowing capacity. Banks apply Reserve Bank DTI restrictions alongside their own servicing and affordability assessments.
A borrower may therefore have $220,000 of indicative usable equity but still be unable to service the additional equity loan and investment-property mortgage.
For a detailed explanation of how debt-to-income limits can affect an investment-property application, see our guide to debt-to-income ratios in New Zealand.
For the broader lender-assessment process, including servicing, rental income, property acceptability and approval considerations, see our guide to investment property mortgages in New Zealand.
Using equity may help provide the required contribution for an investment property, but it also increases your total debt and can expose your existing property to greater risk.
Using equity normally creates an additional loan. The investment purchase must remain affordable alongside existing household commitments.
Depending on the structure, the lender may hold security over both the existing home and the investment property.
A decline in value can reduce the remaining equity buffer and make future borrowing or refinancing more difficult.
Vacancies, repairs, interest-rate increases or changes in household income can place pressure on repayments.
If multiple properties are tied together as security, selling, refinancing or restructuring one property may involve the lender reassessing the wider lending position.
Using every available dollar of equity may therefore not be appropriate, even where the lender is prepared to approve it.
The purpose and tracing of borrowing can affect its tax treatment. Where personal and investment borrowing are mixed within a revolving-credit or other variable-balance facility, it may become more difficult to identify which borrowing relates to the investment.
Where appropriate, personal and investment borrowing should therefore be kept clearly identifiable. Platinum Mortgages can assist with the lending structure, but a qualified accountant should confirm the tax treatment and record-keeping requirements.
For current guidance on how interest deductibility applies to investment-property borrowing, see our guide to interest deductibility for investment property in New Zealand.
This page does not provide tax advice.
A preliminary equity calculation or early approval should not be treated as unconditional finance approval for a particular property.
Not necessarily. The most suitable structure may involve one bank or more than one lender, depending on usable equity, servicing, security requirements, costs and future flexibility.
A fall in value can reduce your remaining equity, increase the overall LVR and make future borrowing, refinancing or selling one property more difficult.
Potentially, yes. However, a different LVR boundary may apply, and the lender will still assess all secured lending, servicing, DTI and the proposed structure.
No. The lender may still need to approve the particular property, valuation, insurance and any remaining conditions.
Not necessarily. Retaining a buffer may provide more flexibility if interest rates rise, rent is lower than expected, repairs are needed or property values fall.
Using equity successfully starts with understanding how much equity is actually usable, whether the resulting debt is affordable and how the lending should be structured for your longer-term plans.
Platinum Mortgages can help assess these factors before you commit to an investment property, so you have a clearer understanding of the lending position and the options available.
If you are planning to use equity to buy an investment property, we can review your lending position and options before you commit unconditionally to the purchase.
Talk to an Investment Property Adviser
Platinum Mortgages New Zealand Limited (FSP752271) is a licensed Financial Advice Provider. Angela Downie (FSP742251) is a registered Financial Adviser who provides advice on its behalf and has worked in the financial industry since 2006.
For equity-funded investment purchases, Angela helps clients understand the difference between total equity and usable equity, and how lender policy, servicing and security structure can affect what is actually workable.
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