ChatGPT · National
What's the best bank for a first investment property loan when you already own your home?
If you already own your home in New Zealand and want to buy your first investment property, I’d start by comparing ANZ, ASB, BNZ and Westpac rather than assuming your existing bank is the best option. The right lender will depend on how much equity you have in your home, your income, the rental yield of the new property, and how each bank assesses your ability to service the debt.
The biggest opportunity is that you may be able to use equity in your existing home to help fund the deposit, potentially without having to save the entire deposit in cash. The catch is that your home would then be exposed to more borrowing risk.
Which bank would I approach first?
- ANZ New Zealand — best starting point for using home equity
ANZ clearly explains how existing homeowners may use equity to fund an investment-property deposit. It’s a sensible first conversation if you already have a mortgage with ANZ, although another lender may offer a better overall deal. Borrowing for an investment property
ANZ investment property lending
- ASB — worth comparing on interest rates and structure
Ask for a combined proposal covering your current mortgage and the additional investment borrowing. Compare the actual rate offered to you, fees, cashback and flexibility, rather than just the advertised rate.
- BNZ — worth testing your borrowing capacity
BNZ explains how both equity and debt-to-income restrictions affect lending, including topping up an existing mortgage. This is particularly relevant if you have a sizeable existing mortgage. Understanding debt to income ratiosUnderstanding different loan to value ratios
BNZ investment property lending
- Westpac New Zealand — another useful competing offer
Include Westpac when requesting competing mortgage proposals, especially if you want to compare fixed-rate options, loan flexibility and the cost of moving your existing mortgage.
These are my suggested lenders to approach, not a verified ranking of today's best investor mortgage rates. Your personalised approval and pricing could change the order considerably.
The key question: how much equity can you use?
For example, suppose your home is worth NZ$1,000,000 and you owe NZ$400,000 on its mortgage.
| Calculation | Amount |
|---|---|
| Current home value | $1,000,000 |
| Existing mortgage | $400,000 |
| Total equity | $600,000 |
| Potential equity above an 80% home LVR | $400,000 |
That last figure is an illustrative calculation, not a promise that the bank will lend you $400,000. The bank must assess affordability and the security structure, and investor lending restrictions apply. Banks generally require around 30% equity in an existing residential investment property under standard LVR rules, although exemptions and permitted high-LVR lending can affect individual cases. Reserve Bank to ease LVR restrictions - Reserve Bank of New ZealandBorrowing for an investment property
You also need to check debt-to-income limits and the bank's own servicing assessment. Having plenty of equity doesn't automatically mean you can borrow enough.
My recommendation
I would get a whole-of-market mortgage adviser to compare lenders, particularly if your home is already mortgaged. The Financial Markets Authority explains that advisers can compare lenders, assess affordability and explain the total cost and structure of each option. Mortgage advice
Ask them to compare:
- The lowest overall interest rate and fees.
- How much equity you can release without refinancing your entire home loan.
- Whether the home loan and investment loan can be kept as separate facilities.
- The required deposit and how rental income is assessed.
- Fixed versus floating portions, repayment flexibility and any cashback clawback clauses.
Let’s narrow it down to your situation
I can give you a much more useful recommendation if you share these four details.
With those numbers, I can estimate your potentially usable equity and explain which lenders I would approach first.
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Captured 11 October 2026