Understanding Reverse Mortgages & Compounding Interest in New Zealand
For many Kiwi homeowners over 60, your house is your biggest asset.
When rising costs outpace living on savings or National Super, home equity release, or a reverse mortgage is one way to access that equity without selling your home. However, the most common concern retirees and their families have is how compounding interest works over time.
Because you do not make monthly repayments on a reverse equity mortgage, the interest is added to your loan balance each month. This means you pay interest on your interest.
The "Rule of 72" in Practice
A simple way to understand how quickly a loan balance can grow is the Rule of 72. By dividing 72 by the current interest rate, you can estimate how many years it will take for the borrowed amount to double.
Example
If you draw down $50,000 on day one at an interest rate of 7.2%, that specific balance will double to $100,000 in roughly 10 years.
Here is how that impacts your equity, assuming a starting freehold home value of $500,000:
Timeline | Loan Balance (Debt) | Remaining Home Equity (Assuming 0% Property Growth) |
|---|---|---|
Year 0 (Start) | $ 50,000 | $ 450,000 |
Year 5 | $ 71,000 approx | $ 429,000 approx |
Year 10 | $ 100,000 | $ 400,000 (80% of home value remains) |
Keeping Things in Perspective
Drawing a large lump sum on day one is rare. Some providers offer a monthly top up option for living costs, or a ready-to-draw-down balance that can sit waiting unused until you need it. You may only need a smaller lump sum to cover a certain expense. This means you only pay compounding interest on the money you actually draw down —whether that’s fixing a roof, converting a bathroom to be more user friendly, covering health costs, or a monthly top up to help with regular living expenses.
Even if home prices stay completely flat for a decade, a $100,000 total debt on a $500,000 home leaves $400,000 of equity for your security or to pass on to beneficiaries. For many asset-rich, cash-poor seniors, accessing this money provides an extra cash flow cushion alongside the pension to comfortably navigate retirement.
Navigating Your Choices:
8 Financial Pathways for Kiwi Retirees
When your income changes in retirement, looking at your entire asset base is the best place to start.
Here is an overview of the eight primary options available to unlock funds in New Zealand.
1. Living Strictly on the Pension:
Relying solely on National Superannuation. While it covers core survival needs, it leaves little room for unexpected property maintenance, emergency health expenses, or life's small luxuries.
2. Downsizing ("Selling Down"):
Selling your current family home to purchase a smaller, lower-maintenance property. This can free up significant tax-free capital, though house prices and relocating costs (real estate fees, legal fees, and moving trucks) should be factored into your math.
3. Relocating to a Cheaper Region:
Moving from higher-cost areas to more affordable towns or rural districts. This strategy maximizes capital release but means moving away from established social networks, doctors, and family.
4. Moving into a Retirement Village:
Modifying your lifestyle by buying into a licensed village. This offers community safety and structured living, though it operates under a License to Occupy (LTO) model where you typically forfeit 20% to 30% of the capital value upon exit.
5. Generating Home Income (Boarders or Airbnb):
Renting out a spare bedroom or a self-contained flat. This provides a steady, ongoing weekly cash flow without altering your property ownership, though it requires sharing your personal space.
6. Intergenerational Family Loans:
Borrowing funds directly from children or relatives, often with an agreement to settle the debt out of the estate later. This avoids bank interest entirely but requires strict legal clarity to protect family relationships.
7. Standard Bank Loans:
Applying for a traditional mortgage top-up or personal loan. Because standard banks require proof of ongoing income to service monthly principal and interest repayments, applications from retirees are frequently turned down.
8. Home Equity Release (Reverse Mortgages):
Borrowing against your home's equity with a specialized provider. No monthly repayments are required, and the loan is repaid when the house is eventually sold. It provides immediate cash flexibility but does incur compounding interest and reduces the final inheritance left to your family.
Your Financial Pathway Starts Here
Whether you're exploring your options, planning ahead, or helping a family member navigate important decisions, we're here to help with retirement funding education. Take the first step on your pathway to greater financial confidence and understanding.
Disclaimer
The information on this page is provided for educational purposes only and does not constitute personalised financial advice. Accessing equity from your home involves borrowing and may affect your future financial position and estate planning objectives. Lending criteria, fees, interest rates, terms and conditions vary between providers. Independent legal and financial advice should be obtained before making any borrowing or property-related decisions.
