/ Using home equity to buy an investment property
Property investment guide
Using home equity to buy an investment property in New Zealand
Most people who buy an investment property in New Zealand do not fund the deposit with cash. They borrow against the equity in the home they already own.
General information, not financial advice
9 min read
LVR settings current from 1 December 2025
On this page
That single sentence hides a lot of detail. How much equity a lender will actually let you use is different from how much equity you have. The way the lending is arranged changes what happens to your existing home loan. And the deposit is rarely the part that decides whether the purchase goes ahead.
​
This page explains how home equity works as a deposit, what usable equity means, how lenders set the limit, and what using equity does to the loan you already have. It is general information about a mechanism, not a recommendation to use it. For the wider picture, see how property investment works in New Zealand.
What home equity is, and what usable equity means
Home equity is the difference between what your property is worth and what you still owe on it.
​
If your home is worth $1,000,000 and you owe $400,000, your equity is $600,000.
​
That is the number most people know. It is not the number a lender works from.
​
Usable equity is the portion a lender will let you borrow against. It is always smaller than total equity, because banks lend only up to a set percentage of a property's
value rather than the whole of it. That percentage is the loan-to-value ratio, or LVR.
​
For an owner-occupied home the usual cap is 80 percent. On the same example:
Illustrative figures only. Individual lenders apply their own criteria.
The $200,000 difference is not money that disappears. It stays as equity in the property. It is simply the buffer the lender keeps between what the property is worth and what it is willing to lend against, and it is why the answer to "how much can I use" is never the same as the answer to "how much do I have".
How lenders decide how much of your equity you can use
Two things set the limit: the LVR cap on the property you are borrowing against, and the LVR cap on the property you are buying.
​
Reserve Bank of New Zealand loan-to-value restrictions in effect from 1 December 2025 set the general position:
Source: Reserve Bank of New Zealand loan-to-value restrictions, in effect from 1 December 2025. Banks can lend outside these limits within a restricted allowance, and settings change from time to time.
Two things follow from that.
​
The first is that the deposit required on an existing rental has generally been higher than on a qualifying new build. That difference is one practical reason new builds have been a common route for first-time investors, separate from any tax treatment.
​
The second is that individual banks sit on top of the restrictions with their own policies. A bank may cap you below the regulatory limit, or treat a particular property type differently, or decline to release equity at all depending on your circumstances. The restrictions set a boundary. They do not set your answer.
Where the deposit comes from when it is not cash
The mechanism runs in a set order.
1
The existing property is valued
The lender needs a current figure to calculate usable equity against, so it will either accept a desktop valuation or require a registered valuation. Which one applies depends on the lender and the size of the request.
2
Lending against the existing property is increased
The home loan is topped up, or a new loan is added against the same security, up to the usable equity limit.​
3
Those funds become the deposit
They are applied to the purchase of the second property in the same way a cash deposit would be.
4
The second property carries its own lending
The balance of the purchase price is borrowed against the investment property itself, subject to the LVR cap for that property type.
At the end of it you own two properties and hold two sets of borrowings, one secured against your home and one against the investment. The total debt has increased by the full purchase price, not just by the portion borrowed against the new property. That point is easy to lose and it matters more than almost anything else on this page.
How the lending is usually structured
There is more than one way to arrange the borrowing, and the arrangement affects how the loans behave afterwards.
A top-up
Increases the existing home loan. The additional borrowing sits inside the same loan, on the same terms, with one combined repayment.
​
A separate split
Places the additional borrowing in its own loan account, secured against the same property. There are two repayments rather than one, and the split can carry a different rate or term from the original loan.
​
Cross-collateralisation
Is where both properties secure both loans, rather than each property securing its own. Lenders sometimes prefer it because it gives them security across the whole position. For the borrower it means the two properties are tied together: selling one, refinancing one, or moving one to another lender generally requires the lender to reassess the whole arrangement rather than just the property involved.
​
Which structure applies is a matter for you and your lender. Each behaves differently when circumstances change later, which is why the arrangement is worth understanding before it is set rather than after.
Staircase does not provide mortgage or financial advice. A licensed mortgage adviser can talk you through how the structures compare.
What it means for your existing home loan
Using equity is not free capital. It is additional borrowing secured against your home, and it has four consequences worth being clear about.
Repayments on the existing loan increase
Borrowing more against the home raises the amount owing and the payment that services it, regardless of what the investment property does.
​
Your home forms part of the security
If the investment does not perform as expected, the borrowing secured against your home does not change. That is the trade-off at the centre of this mechanism, and it is the reason lenders stress-test the position rather than take it at face value.
​
Borrowing capacity is
consumed
Equity used on one purchase is not available for another. Servicing capacity works the same way.
​
Rental income does not automatically cover the gap
Rates, insurance, maintenance, management fees and vacancy all sit between gross rent and what is left to service the loan. Whether the shortfall is manageable depends on your income, the property, and the rate environment at the time.
​
None of this makes the mechanism unsound. It makes it a decision that needs a buffer behind it, which is why the readiness questions on our full guide to property investment in New Zealand put a separate cash reserve ahead of the purchase itself.
Home equity compared with a cash deposit
From the lender's point of view a deposit is a deposit. From yours, the two work quite differently.
The practical difference is exposure. A cash deposit puts money you already hold into a property. An equity-funded deposit puts borrowing secured against your home into a property. The purchase looks identical from the outside; the position underneath it does not.
What lenders look at beyond equity
Having enough usable equity is necessary. It is rarely the thing that decides the application.
​
Lenders assess servicing as well as security. They stress-test your ability to make repayments at rates well above the current one, and they typically count only a portion of expected rent as income rather than the full amount. An application can clear the deposit requirement comfortably and still fail on servicing.
​
Income, existing debt, dependants, credit history and the property itself all form part of that assessment. Our full guide to property investment in New Zealand covers how banks approach investment lending in more detail.
Common questions
There is no fixed figure. It depends on the price of the property you are buying, the LVR cap that applies to it, and how much usable equity your own property supports. On the illustrative figures above, $400,000 of usable equity would cover the deposit on a qualifying new build at many price points, but servicing would still need to be assessed separately.
No. Total equity is your property's value less what you owe. Usable equity is the portion within the lender's LVR cap, which is smaller. The gap between the two is the buffer the lender retains.
Usually some. Legal fees, building inspections, valuations, lender fees and a separate cash buffer for holding costs sit outside the deposit. Some lenders will allow those to be included in the borrowing and some will not.
The amount owing increases and the repayment increases with it. Depending on the structure, the additional borrowing either sits inside the existing loan or in a separate account alongside it.
Sometimes, subject to the LVR cap for investment property, which has generally been tighter than the cap for an owner-occupied home. The mechanism is the same but the limit is lower.
Not always. Some lenders accept a desktop valuation for smaller equity releases and require a registered valuation above a threshold or where the property is unusual. The lender sets the requirement.
This page is general information only — it isn't financial advice, and it doesn't take account of your goals, situation or needs. Staircase Financial Management doesn't provide regulated financial advice and won't tell you what to do with your money.
​
We've taken real care to get this right, but every now and then the odd detail slips through. Please do your own research, and talk to a licensed financial, legal or tax adviser before making any investment decision.
Important information
Keep reading
Where this sits in the bigger picture
Main guide
How property investment works in New Zealand
​
The full picture: strategy, lending, structures and readiness.
CALCULATOR
Home equity
calculator
​
Work out usable equity on your own property.
CALCULATOR
Loan-to-value ratio
calculator
​
The full picture: strategy, lending, structures and readiness.