The Bank of Mum and Dad: Helping First Home Buyers the Right Way

With property prices climbing faster than wages, many New Zealanders are turning to family for help to purchase their first home. The "Bank of Mum and Dad" has become one of the country's largest sources of home loan support, with research showing that those who receive financial help from parents are more than twice as likely to achieve home ownership than those who do not.

How Common Is Parental Help?

The numbers tell a striking story about generational change. Research shows that 47% of those who bought a home in the past five years received family help-up from less than a third before 2010 and just 13% in the 1970s. This dramatic shift reflects the reality of modern property prices.

In 1985, houses cost approximately 3.3 times the average salary. Today that ratio is closer to 10 times in many regions and over 13 times in Auckland. A 20% deposit for the average New Zealand house now exceeds $150,000, rising above $200,000 in Auckland. For many young people, saving this amount while paying rent and managing living costs is simply not achievable within a reasonable timeframe.

Victoria University senior research fellow Max Rashbrooke puts it bluntly: "I think it's pretty rare to buy a home without an inheritance or some kind of assistance from your parents."

The Long-Term Impact of Family Help

The financial impact of parental assistance extends far beyond the initial deposit. Analysis by economist Shamubeel Eaqub found that a $100,000 gift from parents can leave first home buyers more than $1 million better off by retirement compared to someone who had to save their entire deposit themselves.

This happens because family help allows buyers to enter the market earlier, building equity and benefiting from property appreciation over a longer period. Every year spent saving for a deposit is a year of rent paid with no equity gained, while property prices continue to rise.

Ways Parents Can Help

Cash Gifts

Among recent first home buyers who received family help, 44% received a cash gift. A gift is money transferred without any expectation of repayment. Banks generally accept gifted deposits, but they require formal documentation confirming the gift is non-repayable and that the giver has no claim over the property.

The advantage of a gift is simplicity-there is no ongoing obligation between family members. However, gifts have significant relationship property implications that we will discuss below.

Family Loans

Around 34% of those receiving family help received a loan rather than a gift. A family loan involves parents lending money with an expectation of repayment, though often on more favourable terms than a bank would offer.

Family loans can be structured with low or no interest, flexible repayment schedules, and terms that adapt to the borrower's circumstances. However, they require careful documentation and can complicate the mortgage application process, as banks must factor the repayment obligation into their affordability calculations.

Acting as Guarantor

A parental guarantee involves parents using their own property as additional security for their child's mortgage. This can help first home buyers access loans with smaller deposits or borrow more than they could on their own.

Several banks offer specific products for this arrangement. Westpac's Family Springboard offers two structures: a co-borrower arrangement where the child borrows 80% and a family member co-borrows 20%, or a guarantor structure where the child takes 100% of the loan with the family member guaranteeing 20%. Other banks have similar arrangements.

Co-Purchasing Property

Some parents choose to purchase property jointly with their children, with both parties owning a percentage and splitting costs according to agreed terms. Kiwibank's Co-own product, for example, requires a 20% deposit plus legally binding property-sharing agreements covering ownership rights and obligations.

Co-ownership can work well when parents want to invest alongside their children, but it requires very clear legal agreements about decision-making, ongoing costs, and exit strategies.

Indirect Support

Not all family help involves direct cash transfers. Parents can provide rent-free or low-rent accommodation while their child saves for a deposit. This indirect support can accelerate savings significantly-$400 per week saved on rent adds up to over $20,000 per year.

Some banks also allow parents to offset their savings against their child's mortgage, reducing the interest payable without actually transferring ownership of the funds.

Gift vs Loan: What Banks Need to Know

Banks treat gifts and loans very differently, and the distinction has significant implications for mortgage approval.

Documentation for Gifts

When you receive a gifted deposit, the bank will require a signed gift declaration from the giver. This document must confirm that the money is a genuine gift with no expectation of repayment, that the giver has no interest in the property being purchased, and that the giver will not register any interest against the property title.

The declaration also typically requires identification documents from the giver and proof of the source of funds to satisfy anti-money laundering requirements.

Documentation for Loans

If the money is a loan rather than a gift, the situation is more complex. Banks must include the loan repayment in their affordability calculations, which reduces how much you can borrow. A $50,000 family loan with monthly repayments of $500 could reduce your borrowing capacity by $80,000 or more.

Family loans should be documented in a formal loan agreement specifying the amount borrowed, interest rate (even if zero), repayment schedule, and what happens if circumstances change. Both parties should sign the agreement, and ideally have it witnessed or reviewed by a lawyer.

Relationship Property: Protecting Family Gifts

One of the most overlooked aspects of parental assistance is relationship property law. Under the Property (Relationships) Act, a gift to your child will automatically become relationship property and be shared equally if the couple separates after three years together.

This means that if parents gift $100,000 to help their daughter buy a house with her partner, and the relationship ends five years later, the daughter's ex-partner is entitled to half of that $100,000 (or the equity it created) as part of the relationship property settlement.

Contracting Out Agreements

The solution is a contracting out agreement, sometimes called a prenuptial agreement or relationship property agreement. This is a legal contract between partners stating who owns what and how to divide assets if the relationship ends.

For a contracting out agreement to be legally valid, it must be in writing and signed by both partners. Each partner's signature must be witnessed by their own independent lawyer from a different firm. Each lawyer must certify that they have advised their client on the full effects and implications of the agreement.

Parents cannot force their child or their child's partner to sign a contracting out agreement. However, they can make it a condition of providing financial help-the funds are not released until a valid agreement is in place.

When Courts Can Overturn Agreements

Courts can set aside contracting out agreements if they would cause "serious injustice." A landmark 2025 Supreme Court decision demonstrated that courts are increasingly willing to look through structures designed to protect assets. Simply having an agreement in place is not a guaranteed shield, particularly if circumstances change significantly or the agreement was entered into under pressure.

Understanding Guarantor Risks

Acting as guarantor carries significant risks that parents must understand before agreeing.

What Guarantors Are Liable For

When you guarantee someone else's loan, you become liable to repay that loan if the borrower cannot. The bank can pursue the guarantor directly-it does not have to exhaust options against the borrower first. If you have a mortgage with the same bank, your property can become security for your child's loan as well.

Guarantors are also jointly and severally liable, meaning if there are multiple guarantors, any one of them can be pursued for the entire amount.

Limiting Your Exposure

To reduce risk as a guarantor, ensure there is an upper limit on the guarantee amount. Have an agreement that once sufficient equity is built-typically 20% or more-the guarantee will be released. Most lenders will agree to remove the guarantee once the loan-to-value ratio improves sufficiently.

Parents should always take independent legal advice before agreeing to act as guarantor. The bank will typically require this anyway.

Impact on Your Own Borrowing

While acting as guarantor, the guaranteed amount affects your own borrowing capacity. If you guarantee $100,000 of your child's mortgage, banks will treat this as a contingent liability when assessing any loan applications you make.

Protecting Parents' Financial Security

Massey University's Financial Education and Research Centre director Pushpa Wood notes that pressure to provide financial help can cause significant strain for the older generation. Money that was traditionally passed down after parents died is now being transferred during their lifetime, often at a stage when parents still need it for their own retirement security.

Questions Parents Should Ask Themselves

Before offering financial assistance, parents should honestly assess whether they can afford to give or lend this money without compromising their own retirement. They should consider what happens if they need the money back for healthcare or aged care costs, and whether they can afford to lose the money entirely if things go wrong.

Parents should also think about whether helping one child will create expectations or resentment from other children, and whether they are comfortable with the level of financial transparency required.

Setting Boundaries

It is entirely reasonable for parents to set conditions on their assistance. These might include requiring a contracting out agreement, setting a maximum amount they will contribute, specifying that help is a one-time offer rather than ongoing support, or requiring the child to demonstrate their own savings commitment first.

Tax Considerations

New Zealand does not have a gift tax or inheritance tax, so parents can give money to their children without direct tax consequences. However, if parents provide a loan at below-market interest rates, there may be minor tax implications around imputed interest, though these are rarely significant for typical family arrangements.

If parents are receiving any form of government assistance or benefits, gifting significant sums may affect their entitlements. Professional advice is worthwhile for larger gifts or complex situations.

Having the Conversation

Financial discussions can be uncomfortable, but clear communication is essential for any family assistance arrangement to work well.

Topics to Cover

Families should discuss whether the support is a gift or a loan, and if it is a loan, what the repayment terms are. They should agree on whether the child's partner needs to sign a contracting out agreement and how the arrangement might change if circumstances change-such as job loss, relationship breakdown, or the parents needing the money back.

It is also important to discuss how this assistance affects other siblings. Will they receive equivalent help? Is this an advance on inheritance? These conversations are easier to have before money changes hands than after.

Getting Professional Advice

For any significant family financial arrangement, professional advice is valuable. A lawyer can document agreements properly and explain relationship property implications. A mortgage adviser can explain how different structures affect borrowing capacity. An accountant can advise on any tax implications.

The cost of professional advice is minimal compared to the potential cost of disputes or poorly structured arrangements.

A Tool for Generational Wealth

The Bank of Mum and Dad can be a powerful tool for helping the next generation into home ownership. When structured properly, it benefits everyone-children get into the market sooner, and parents have the satisfaction of helping their family while potentially seeing their wealth grow through property.

The keys to success are honest communication about expectations and limitations, proper legal documentation of all arrangements, protection of gifts through contracting out agreements, realistic assessment of what parents can afford, and professional advice for complex situations.