How Do Interest-Only Home Loans Work in NZ?

How Do Interest-Only Home Loans Work in NZ?

Interest-only home loans offer a unique option in New Zealand’s mortgage landscape, allowing borrowers to pay only the interest on their loan for a set period.

This type of mortgage can be appealing, especially for property investors or first-time buyers looking for lower monthly payments in the short term. However, there are important factors to consider, including NZ interest-only mortgage rates, loan terms, and eligibility criteria.

This guide provides a detailed look into interest-only mortgages in New Zealand, including their advantages, disadvantages, and impact on property investments.

What Are Interest-Only Home Loans in NZ?

An interest-only home loan NZ involves paying only the interest on the borrowed amount for a specific period, typically ranging from one to five years. During this interest-only period, the principal balance (the actual amount borrowed) does not decrease.

Once the interest-only period ends, borrowers are required to start repaying the principal, often resulting in higher monthly payments. These loans are available for both owner-occupiers and property investors, but each type has its conditions and interest rates.

Benefits of Interest-Only Mortgages in New Zealand

For many, the primary attraction of an interest-only mortgage New Zealand is the reduced monthly payment during the interest-only period. Lower payments provide flexibility, especially for property investors or those with other financial commitments.

  • Lower Initial Payments: Ideal for those needing to free up cash flow.
  • Investment Flexibility: Investors can redirect saved funds into other investments or property enhancements.
  • Tax Benefits for Investors: Property investors may gain tax benefits, as the interest on investment loans is often tax-deductible.

However, it’s essential to weigh these benefits against the costs. Since the principal remains untouched, borrowers eventually face higher payments and may end up paying more interest over the life of the loan.

Drawbacks of Interest-Only Home Loans

Understanding the advantages and disadvantages of interest-only home loans in NZ helps make an informed decision:

  • Higher Long-Term Cost: By not repaying the principal early, borrowers pay interest on a larger loan balance over time.
  • Higher Payments After Interest-Only Period: Monthly repayments can increase significantly once the loan reverts to a principal-and-interest structure.
  • Market Risk: If property values decrease, you may owe more than the property is worth, affecting potential resale value.

Eligibility Criteria for Interest-Only Mortgages in New Zealand

Eligibility criteria for interest-only mortgages in New Zealand can vary across lenders, but they typically assess:

  • Income Stability: Proof of stable income to handle increased payments post-interest-only period.
  • Loan-to-Value Ratio (LVR): Generally, a lower LVR (around 60-80%) is favoured.
  • Purpose of Loan: Owner-occupiers may face stricter regulations, while investors might have more flexibility.
  • Financial Position: A solid financial position and credit rating are essential, as lenders assess long-term repayment capabilities.

Some banks may also require an explanation of how borrowers plan to manage the eventual principal repayments, especially for larger or extended interest-only loans.

Understanding NZ Interest-Only Mortgage Rates

The NZ interest-only mortgage rates are influenced by the Reserve Bank of New Zealand’s Official Cash Rate (OCR), lender policies, and the borrower’s creditworthiness. Interest-only rates are often slightly higher than principal-and-interest loans due to increased risk for the lender. Borrowers should compare rates across banks and understand the different rate structures, as rates can significantly affect the long-term affordability of the loan.

To get a clear picture of potential costs, consider using an interest-only mortgage calculator NZ. Calculators allow borrowers to estimate monthly repayments, compare costs between interest-only and principal-and-interest options, and understand how rate changes might impact payments.

How to Switch from Interest-Only to Principal-and-Interest Mortgage in NZ

If you’re on an interest-only loan but considering switching, there are steps to make the transition smoother:

  1. Contact Your Lender: Many lenders allow a switch with minimal fees, but checking any penalties or restructuring fees is essential.
  2. Review Financial Impact: Use a home loan calculator NZ interest only to see the new monthly repayment amount under a principal-and-interest plan.
  3. Evaluate Refinance Options: If your current lender doesn’t offer competitive terms, refinancing with another bank may provide better rates.

Switching can reduce the total interest paid over the loan’s life and increase equity in your property faster. However, borrowers should be prepared for the higher monthly payments that come with principal repayments.

Impact of Interest-Only Loans on Property Investment in New Zealand

Interest-only loans are especially popular among investors. Here’s how interest-only loans impact property investment in New Zealand:

  • Maximising Cash Flow: By reducing the immediate outflow of funds, investors can reinvest in additional properties or property improvements.
  • Tax Advantages: For rental properties, interest expenses are typically tax-deductible, making interest-only loans a cost-effective choice.
  • Market Timing Flexibility: The flexibility in payments allows investors to wait for ideal market conditions to sell, especially beneficial in fluctuating markets.

However, investors need to remain mindful of rising interest rates, which can increase the cost of holding a property.

Best Banks for Interest-Only Home Loans in NZ

The best banks for interest-only home loans in NZ provide competitive rates, flexible terms, and a robust customer service experience. While the specific “best” bank depends on individual needs, popular options include:

  • ANZ: Known for offering flexible terms and competitive rates for both interest-only and principal-and-interest loans.
  • ASB: Offers various home loan packages, including interest-only options tailored to investors.
  • Westpac: Provides customised solutions for different borrower profiles, with interest-only loan options for both owner-occupiers and investors.

Banks may also periodically offer promotional rates for interest-only loans, making it worth comparing options and potentially negotiating terms.

Frequently Asked Questions (FAQs)

What are the advantages and disadvantages of interest-only home loans in NZ?

Interest-only loans offer the benefit of lower initial payments, freeing up cash flow for other financial needs. This is especially useful for investors. However, disadvantages include potentially higher long-term costs, as the principal remains unpaid during the interest-only period. Once this period ends, monthly repayments often increase significantly, posing a potential strain on finances.

What are the eligibility criteria for interest-only mortgages in New Zealand?

Eligibility criteria vary, but most banks look at income stability, loan-to-value ratio, and the purpose of the loan. Investors may find it easier to obtain interest-only loans due to their nature, but owner-occupiers might need to demonstrate a clear repayment strategy. A strong credit score and a secure financial position are also critical in gaining approval for an interest-only mortgage.

How can I switch from interest-only to principal-and-interest mortgage in NZ?

Switching to a principal-and-interest mortgage involves contacting your lender, reviewing the impact on your finances, and possibly refinancing with another bank if better terms are available. Using a home loan calculator NZ interest only can help gauge the new monthly repayments, aiding in financial planning before the switch.

How do interest-only loans impact property investment in New Zealand?

Interest-only loans can enhance cash flow for property investors, allowing funds to be reinvested or reserved for future expenses. Additionally, the interest paid is usually tax-deductible, which can reduce the cost of the loan. However, interest-only loans may pose risks, especially if the property market fluctuates or if interest rates rise, increasing the cost of holding the property.

Which are the best banks for interest-only home loans in NZ?

The best banks for interest-only home loans include ANZ, ASB, and Westpac, which provide competitive rates, flexible loan terms, and strong customer support. However, borrowers should assess each bank’s terms and fees, as well as any potential promotional rates that could make a difference in long-term costs.


By exploring the intricacies of interest-only loans, New Zealand borrowers and investors can make more informed decisions about the type of mortgage that best suits their financial goals and property investment strategies. Make use of the resources available, such as interest-only mortgage calculators, to estimate costs and explore various lending options to find the most suitable plan.