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Reverse Mortgage Calculator

Model a Heartland-style reverse mortgage. See max LVR by age, compounding debt over time, and estate equity remaining after years of drawdown.

By Konstantin IakovlevPublished 28 March 2026Last reviewed
Data stays on your deviceNZ property data

About this calculator

This calculator implements Heartland reverse mortgage LVR + interest rate schedule from Heartland Bank NZ. Last consulted 18 May 2026. Verify the figures yourself by following the link.

Heartland Reverse Mortgage parameters

Mid-2026 indicative
  • Interest rate: ~9.25% p.a. variable
  • Compounding: Monthly (no regular repayments)
  • Max LVR at age 60: 20%
  • Max LVR at age 70: 30%
  • Max LVR at age 80: 45%
  • Min property value: $200,000
  • No Negative Equity Guarantee: Yes — debt can't exceed home

Source: Heartland Bank NZ

Disclaimer

This calculator provides estimates for general information purposes only. Results should not be relied upon as professional financial, tax, or legal advice. Tax rates and thresholds are based on publicly available IRD data and may change. Always consult a qualified tax agent or financial adviser for advice specific to your circumstances.

How a Heartland reverse mortgage compounds

Borrow against home equity. No regular payments — interest compounds monthly. Repaid on sale/death.

  1. 1

    Max borrowing by age

    Max_borrow = home_value × LVR(age)

    LVR: 60yo 20%, 70yo 30%, 80yo 45%.

  2. 2

    Compounding balance

    Balance(t) = (Balance(t-1) + monthly_drawdown) × (1 + r ÷ 12)

    r ≈ 9.25% p.a. variable.

  3. 3

    Future home value

    Home(t) = Home_0 × (1 + growth_rate)^t

    Assume 3-4% long-term NZ growth.

  4. 4

    Estate equity

    Equity = max(0, Home(t) − Balance(t))

    NNG: debt can never exceed home value.

Worked example

Inputs: $900k home, age 70, $50k lump + $1,200/mo for 15yr, 3.5% growth

Result: Max borrow $270k. After 15yr: debt $510k, home $1.51M, equity ~$998k.

Frequently Asked Questions

How does a reverse mortgage work in NZ?
Heartland Bank is the dominant NZ provider. You borrow against your home equity (up to 20-50% LVR depending on age — older = higher LVR). No regular repayments — interest compounds onto the balance, ~9.25% p.a. Repaid when the home is sold, you move into care, or pass away. Heartland's "No Negative Guarantee" means the debt can never exceed the home value. Source: Heartland Bank.
Is a reverse mortgage a good idea?
For some retirees yes — particularly if you're asset-rich but cash-poor and want to age in your home. Downsides: the compounding interest erodes inheritance rapidly (a $100k loan at 9.25% becomes $245k after 10 years). Consider alternatives first: downsize, equity release products like Lifetime Home, or KiwiSaver withdrawal. Get independent financial advice. Source: Sorted NZ + MoneyHub.
How does a NZ reverse mortgage affect my will and inheritance?
A reverse mortgage reduces the equity passed to your estate. Example: a $100,000 reverse mortgage at 9.25% compounding over 15 years grows to ~$381,000 debt. If your home is worth $900,000 then and your beneficiaries inherit it, they'd receive $519,000 after paying off the debt (instead of $900,000). Heartland's 'No Negative Equity Guarantee' (NNG) means the debt can never exceed the home value — your estate can never owe extra. To preserve more inheritance, drawdown smaller amounts or use the income stream option (vs lump sum). Talk to your beneficiaries before signing — many family disputes arise from undisclosed reverse mortgages. Source: Heartland Bank + MoneyHub.
Are there alternatives to a reverse mortgage in NZ?
Yes — consider these first. (1) Downsize: sell the family home, buy something smaller, pocket the difference. Often the cheapest option. (2) Lifetime Home Equity Release — a buy-back scheme where Lifetime buys 35% of your home, you live there for life, kids inherit 65%. Cheaper than reverse mortgage long-term. (3) Granny flat or boarder rental — extra income without debt. (4) KiwiSaver withdrawal at 65 — if you have $200k+ in KS, you may not need the equity release. (5) NZ Super + Accommodation Supplement + Rates Rebate — maximise government support first. (6) Family loan — kids advance an inheritance with documented agreement. Get independent financial and legal advice before any decision. Source: Sorted NZ retirement guide.

How this calculator works

This reverse mortgage calculator uses the latest data from official New Zealand government sources to provide accurate results. All calculations are performed in your browser — your data never leaves your device.

All calculations are performed in your browser — your data never leaves your device. Results are for general guidance only and should not be considered professional financial advice.

Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.

Last reviewed: