A reverse mortgage lets homeowners aged 60+ borrow against their home equity without making repayments during their lifetime. The loan, plus compound interest, is repaid when the home is sold (usually when you move into care or pass away). In NZ, Heartland Bank is the primary reverse mortgage provider. This guide explains how they work, the compound interest effect, the no negative equity guarantee, alternatives, who reverse mortgages suit, who they don't, and the real long-term cost with worked examples showing equity erosion over 10 and 20 years.
| Feature | Detail |
|---|---|
| Provider | Heartland Bank (primary NZ provider) |
| Minimum age | 60 (younger if couple, based on youngest borrower) |
| Interest rate | Typically 9 to 10% fixed (significantly higher than standard mortgage rates) |
| Maximum loan | 15 to 40% of home value (depends on age; older = higher percentage) |
| Repayments | None required (but you CAN make voluntary repayments) |
| No negative equity guarantee | You'll never owe more than the home is worth |
| Occupancy right | You can live in the home for life |
| Fees | Application fee (~$600 to $900), legal costs, valuation |
Reverse mortgage rates (9 to 10%) are much higher than standard home loans (5 to 7%). Reasons: the lender receives no payments for potentially 20+ years (cash flow risk), the loan balance grows rather than shrinks (credit risk increases over time), the no negative equity guarantee means the lender caps their recovery at the home's value, and the product is complex with higher administration costs.
Compound interest means you pay interest on the original loan AND on the accumulated interest. This exponential growth is the single most important thing to understand about reverse mortgages.
This is the "Rule of 7.5": at 9.5%, your debt approximately doubles every 7.5 years. A $100,000 loan becomes nearly $1 million after 25 years.
Home value: $700,000. Reverse mortgage: $100,000. Assuming 3% annual house price growth:
| Year | Home Value | Loan Balance | Remaining Equity | Equity as % of Home |
|---|---|---|---|---|
| 0 | $700,000 | $100,000 | $600,000 | 86% |
| 5 | $811,000 | $155,000 | $656,000 | 81% |
| 10 | $940,000 | $241,000 | $699,000 | 74% |
| 15 | $1,090,000 | $375,000 | $715,000 | 66% |
| 20 | $1,264,000 | $582,000 | $682,000 | 54% |
| 25 | $1,466,000 | $903,000 | $563,000 | 38% |
Even with 3% annual house price growth, the loan eats into equity significantly. After 25 years, only 38% of the home's value remains as equity. If house prices grow more slowly (or stagnate), the erosion is much worse.
| Alternative | Pros | Cons |
|---|---|---|
| Downsizing (sell and buy smaller) | Releases equity, no debt, lower rates/insurance/maintenance | Moving stress, emotional attachment, transaction costs (agents, legal) |
| Taking a boarder | Regular income, companionship, no debt | Privacy loss, vetting required, potential conflict |
| Rates rebate | Reduces council rates for low-income homeowners, easy to apply | Maximum ~$700/year, doesn't solve large cash needs |
| Government support | Accommodation Supplement if renting; various MSD entitlements | Limited amounts, complex eligibility |
| Family loan | Lower/no interest, flexible terms | Family conflict risk, informal arrangements can go wrong |
| KiwiSaver withdrawal | Your own money, no interest | Depletes retirement savings |
| Part-time work | Regular income, social contact, no debt | Health/ability limitations for some |
Jean, 70, borrows $50,000 reverse mortgage at 9.5% to renovate her bathroom and kitchen.
Bob and Mary, both 68, draw down $15,000/year to supplement NZ Super. Home value: $800,000.
Took a $120,000 reverse mortgage without telling her adult children. Home value: $650,000.
Lesson: If you have beneficiaries who expect to inherit, discuss a reverse mortgage with them before proceeding. Surprises cause conflict. Transparency is better than secrecy.
Considered a reverse mortgage of $80,000 for home modifications and daily expenses.
Lesson: Explore ALL alternatives before a reverse mortgage. The combination of rates rebates, boarders, government entitlements, and downsizing can often provide the same financial relief without compound interest eroding your equity.
No children or close family. Home worth $550,000. Needed $40,000 for a walk-in shower, ramp, and home safety modifications.
Lesson: For homeowners with no beneficiaries who need to stay in their home, a reverse mortgage can be a rational and cost-effective choice. The key factors: no inheritance concerns, clear purpose for the funds, and the alternative (residential care) is far more expensive.
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