Low Deposit Mortgage NZ — Buying With Less Than 20% Deposit

The 20% deposit requirement is the single biggest barrier to homeownership for most New Zealanders. But it’s not an absolute rule. There are legitimate pathways to purchase with a smaller deposit — each with different eligibility criteria, costs, and risks.

This guide explains every low-deposit option available in New Zealand.

Why Banks Require 20% (And When They Don’t)

The Reserve Bank of NZ’s LVR restrictions limit how much high-LVR lending (above 80% LVR) banks can do as a proportion of their new mortgage lending. Currently, a maximum of 15% of new owner-occupier lending can be above 80% LVR.

This means banks can lend with less than 20% deposit — they just can’t do too much of it. They prioritise their limited high-LVR allocation for the strongest applications: good credit, stable employment, strong income, and deposits as close to 20% as possible.

Option 1: First Home Loan (5% Deposit)

The Kāinga Ora First Home Loan is the most accessible low-deposit pathway. It allows eligible buyers to purchase with 5% deposit without paying the rate premium that normally comes with high-LVR lending.

Kāinga Ora underwrites the mortgage — guaranteeing the lender against the additional risk — so the bank doesn’t need to use its LVR allowance.

Eligibility:

Income ≤ $95,000 (single) or $150,000 (combined)
Not currently owning property
Property within Kāinga Ora’s regional price caps
5% deposit from savings/KiwiSaver

This is the recommended first port of call for most first home buyers with limited deposits. See First Home Loan NZ Guide.

Option 2: Standard High-LVR Lending (10–19% Deposit)

If you don’t qualify for the First Home Loan (income too high, property above the cap, or second purchase), you can still apply for standard high-LVR lending with a 10–19% deposit. But banks manage their LVR allocation carefully.

What to expect with 10–19% deposit:

Rate premium: Most banks charge a rate loading of 0.25%–0.75% for high-LVR borrowing (except under the First Home Loan guarantee). On $650,000, a 0.5% loading costs $3,250/year in additional interest.

Stricter credit requirements: Banks reserve high-LVR lending for their strongest applicants — stable employment, clean credit file, low expenses, and income comfortably servicing the loan at the stress test rate.

Limited availability: Banks’ high-LVR allocations fill up, particularly in busy markets. You may be declined not because of your individual creditworthiness, but because the bank is at its allocation limit.

Deposit by purchase price at 10%:

Purchase price	10% deposit
$500,000	$50,000
$600,000	$60,000
$700,000	$70,000
$800,000	$80,000

Option 3: Guarantor Mortgage (Using Family Equity)

A guarantor mortgage uses a family member’s property as additional security, allowing you to borrow up to 100% of the purchase price without a cash deposit.

How it works:

Your guarantor (typically parents) provides their property as additional security
The bank has security over both your property and the guarantor’s
If you default, the bank can recover against the guarantor’s property
As you build equity, the guarantee can be removed (typically when LVR falls to 80% or below)

Risks for the guarantor: This is a genuine financial risk for the guarantor. If you can’t repay, their property is at stake. Guarantor mortgages should only be arranged with proper legal advice, full financial disclosure to all parties, and ideally with a plan for when the guarantee will be released.

See Guarantor Mortgage NZ for the complete guide.

Option 4: Gifted Deposit

A gift from parents or family can form part or all of your deposit. Banks accept gifted deposits but require documentation:

A statutory declaration from the donor confirming the money is a gift, not a loan
Evidence of the donor’s ability to make the gift (their bank statements)
Confirmation that the gift does not need to be repaid

If the bank discovers the “gift” is actually a loan from family, it counts as a liability and reduces your borrowing capacity — potentially collapsing the application.

The gift doesn’t need to be the full deposit — it can top up your savings to reach 10% or 20%.

See Gifted Deposit NZ for documentation requirements.

Option 5: New Build Properties (More Generous LVR)

New build properties (newly constructed homes or apartments) are exempt from the standard LVR restrictions. This means:

Owner-occupiers can purchase a new build with a 10% deposit with no rate premium
Investors can purchase a new build with a 20% deposit (versus 35% for existing properties)

This is a deliberate policy choice by the RBNZ to encourage new housing supply.

If you’re flexible on property type, a new build may allow you to purchase sooner and with a smaller deposit. See New Build Mortgage NZ for details.

The Real Cost of Low Deposit Borrowing

Low-deposit borrowing is more expensive. The cost comes from:

1. Rate loading A 0.5% rate premium on $650,000 over 25 years = approximately $28,000 in additional interest.

2. No Lenders Mortgage Insurance (unlike Australia) New Zealand does not have mandatory Lenders Mortgage Insurance (LMI). The rate premium (for standard high-LVR lending) is how banks price the additional risk instead.

3. Larger loan = more interest overall With a smaller deposit, you’re borrowing more. A 5% deposit buyer on a $700,000 property borrows $665,000. A 20% deposit buyer borrows $560,000. The $105,000 extra borrowed at 5.55% over 30 years = approximately $240,000 in additional interest over the life of the loan.

Comparing the Options

Option	Min. deposit	Income limit	Rate loading	Equity built
First Home Loan	5%	$95k / $150k	None	Standard
High-LVR standard	10–19%	None	0.25–0.75%	Standard
Guarantor	0% (with guarantee)	None	Varies	Standard
New build	10%	None	Usually none	Standard
Gifted deposit	Varies	None	As per LVR	Standard