How to Finance Your First Investment Property in New Zealand

Financing your first investment property in New Zealand is more complex than financing a home you live in. The rules are different, the deposit requirements are higher, and the way banks assess your application is more detailed. Here is a clear guide to how it works in 2026.

Deposit Requirements

For most existing investment properties, banks require a minimum 30% deposit. On a $600,000 Canterbury investment property, that is $180,000. From 1 December 2025, banks can make up to 10% of new investor lending to borrowers with deposits between 20-30%, up from 5% previously. This means some investors with 20-25% deposits can now access lending, but it depends on each bank's appetite to use their speed limit allocation at any given time. For new build investment properties, the LVR exemption means only a 20% deposit is required regardless of which bank you use. This is a meaningful difference for investors who have 20% but not 30% saved.

How Banks Assess Rental Income

Banks typically count only 75-80% of anticipated rental income when assessing serviceability, to account for vacancy and operating costs. They use market rent assessments (from the registered valuation or their own data) rather than the rent you hope to achieve. Both your existing income and the discounted rental income are used to calculate your total income for the DTI assessment. The investor DTI limit of 7x means your total debt (including proposed new mortgage, existing mortgages, personal loans, student loans, and credit card limits) cannot exceed 7x your total annual gross income for more than 20% of new investor lending. New builds are exempt from this DTI calculation.

Interest-Only vs Principal and Interest

Investors frequently choose interest-only mortgage terms for investment properties to maximise short-term cashflow. Interest-only lending is available but typically limited to 5 years before banks require a switch to principal and interest. The advantage of interest-only is lower regular payments and better short-term cashflow. The disadvantage is that the principal does not reduce during the interest-only period, meaning you are entirely reliant on capital growth to build equity rather than also benefiting from debt repayment. Most banks allow investors to structure investment loans on interest-only terms with appropriate equity and serviceability positions.

Working With a Mortgage Broker

Using a qualified mortgage broker for investment property lending is strongly recommended. Different banks have different policies, different appetites for investor lending at any given time, and different assessment approaches for rental income, self-employment income, and portfolio equity. A good broker understands which bank is most suitable for your specific situation, can structure the application to present your financial position most accurately, and can navigate the DTI and LVR rules across multiple properties. The broker's fee is typically paid by the bank, not by you.

LVR and DTI data from RBNZ. For general information only - not financial or mortgage advice. Always consult a qualified mortgage adviser before applying for investment property finance.