---
title: Guarantor Legal Responsibilities on a Home Loan | GNT Finance
description: What a guarantor is legally liable for on an Australian home loan, National Credit Code and Banking Code protections, limited guarantee caps and release rules.
url: https://gntfinance.com.au/legal/guarantor-legal-responsibilities/
section: legal
updated: 2026-09-01
author: Gorakh Timilsina, GNT Finance
---

# Legal responsibilities of a home loan guarantor

**In short:** A home loan guarantor promises to pay the lender if the borrower defaults, up to the amount stated in the guarantee, and usually secures that promise with a mortgage over their own home. Guarantees are regulated by the National Credit Code and the Banking Code of Practice, which require written disclosure, time to consider, and generally stop a lender enforcing against the guarantor's home before pursuing the borrower.

Family guarantees are one of the most common ways first home buyers in Melbourne's north get into the market without a 20% deposit or lenders mortgage insurance, and our guide to [buying with a guarantor](/guides/buying-with-a-guarantor/) covers the practical side. They work well when everyone understands the legal position. This page sets out what a guarantor actually signs up to, the protections the law provides, and how the arrangement ends.

## What the law says

### National Credit Code

The National Credit Code, which is Schedule 1 to the [National Consumer Credit Protection Act 2009 (Cth)](/legal/national-consumer-credit-protection-act/), regulates guarantees of consumer credit contracts including home loans. Under Part 3 of the Code:

- A guarantee must be in writing and signed by the guarantor.
- Before signing, the guarantor must be given a copy of the credit contract (or proposed contract) and a prescribed information statement explaining the guarantor's rights and obligations.
- A guarantee that doesn't comply with these requirements is unenforceable against the guarantor.
- The guarantor may withdraw from the guarantee at any time before credit is first provided under the contract, and afterwards if the credit contract differs materially from the copy given to them.
- The guarantor is not liable for increases in the borrower's limit or for changes to the contract that increase their liability unless they agree in writing.
- A guarantee can be reopened by a court as unjust in the same way as a credit contract.

### Banking Code of Practice

Most lenders subscribe to the Banking Code of Practice, which adds protections for individual guarantors. The lender must give the guarantor key information about the loan and the borrower's financial position, must allow the guarantor time to consider the documents before signing, must recommend independent legal advice, and must not accept a guarantee signed in the presence of the borrower where that could involve pressure. Critically, the Code generally prevents a lender from enforcing a guarantee against a guarantor's home until it has first obtained a judgment against the borrower or exhausted recovery from the borrower, subject to exceptions such as where the borrower cannot be found.

### Best interests duty and AFCA

A mortgage broker arranging a guarantor loan owes the borrower a [best interests duty](/legal/best-interests-duty-mortgage-brokers/). Guarantors can complain to the Australian Financial Complaints Authority ([afca.org.au](https://www.afca.org.au)) if a lender has enforced a guarantee unfairly or failed to follow the Code.

## How a security guarantee works

Most family guarantees in Australia are limited security guarantees rather than income guarantees:

1. **The borrower buys the home** and takes a loan for up to the full price plus costs.
2. **The guarantor offers their own property as additional security.** The lender registers a mortgage over the guarantor's home under the Transfer of Land Act 1958 (Vic).
3. **The guarantee is limited to a stated amount**, typically the portion of the loan above 80% of the purchase price plus a buffer for costs. The guarantor is not liable for the whole loan.
4. **The borrower makes all repayments.** The guarantor pays nothing unless the borrower defaults.
5. **If the borrower defaults**, the lender follows the default and enforcement process, sells the borrower's property first, and can only then call on the guarantor for the shortfall up to the guaranteed amount.
6. **The guarantee is released** when the loan balance falls below 80% of the property's value, or the borrower refinances without the guarantee.

### Guarantor's exposure at each stage

| Stage | Guarantor position |
|---|---|
| Before credit provided | Can withdraw without penalty |
| Loan running normally | No payments; mortgage sits on guarantor's title |
| Borrower in arrears | Lender must notify guarantor of default; guarantor may pay to stop enforcement |
| Borrower's property sold | Guarantor liable only for shortfall up to the guaranteed cap |
| Shortfall exceeds cap | Guarantor's liability stops at cap; balance remains borrower's debt |
| LVR below 80% | Guarantor can request release and discharge of mortgage |

## Worked example

Your daughter buys a $650,000 house in Craigieburn with $20,000 in savings. Without help, she would need lenders mortgage insurance on a loan of around 97% of the price. Instead you provide a limited guarantee of $150,000 secured over your Roxburgh Park home.

The lender advances $650,000 plus costs, with 80% ($520,000) secured only against her house and the remaining $130,000 plus costs covered by your guarantee. She pays no LMI, which our [LMI calculator](/calculators/lmi/) would show as a saving in the tens of thousands at that LVR.

Three years later, the house is worth $720,000 and the loan is $600,000, an LVR of about 83%. Another year of repayments and modest growth brings the loan below 80% of the value, and the lender releases your guarantee and discharges the mortgage over your home.

If instead she had defaulted in year two and the lender sold her house for $600,000 with a $640,000 debt, the shortfall would be $40,000 plus costs. That falls within your $150,000 cap and is what you would be asked to pay, but only after the lender had pursued her first.

## What it means for your home loan

- **The guarantor's home is mortgaged.** That affects the guarantor's ability to refinance, sell or borrow against their own home while the guarantee is in place.
- **Serviceability.** A limited security guarantee usually doesn't require the guarantor to prove income, but some lenders will check the guarantor's own financial position, particularly for retired guarantors.
- **The borrower still needs to service the full loan** under the lender's assessment, including the APRA buffer of 3 percentage points above the actual rate.
- **Release strategy matters.** Extra repayments and a revaluation are the fastest route to releasing a parent. Our [extra repayments calculator](/calculators/extra-repayments/) shows how quickly the LVR can fall.
- **Independent advice is not optional in practice.** Most lenders require the guarantor to obtain a solicitor's certificate confirming they received independent legal advice.

GNT Finance has arranged many family guarantees in Melbourne's north, including within the Nepali community where parents often want to help without giving cash. Gorakh Timilsina's years assessing guarantor files as a senior credit officer mean the guarantee is sized and structured to protect both generations. Our home-loan service is at no cost to you in most cases.

## Common mistakes

- **Signing an unlimited guarantee** when a limited one would have done.
- **Guaranteeing an investment loan** without understanding that the property may be harder to sell quickly.
- **Not reading the borrower's financial information** the lender provides.
- **Assuming the guarantee ends automatically.** It ends when the lender agrees to release it; ask.
- **Guarantors in retirement** offering their only asset without considering Centrelink, aged care and estate consequences.
- **Not telling the other parent or the guarantor's own lender.** If the guarantor's home already has a mortgage, that lender's consent is needed for a second mortgage.

## Frequently asked questions

### What is a guarantor legally responsible for on a home loan?

A guarantor is liable to pay the lender the amount stated in the guarantee if the borrower defaults. With a limited security guarantee this is a capped sum, often the part of the loan above 80% of the purchase price, secured by a mortgage over the guarantor's property. The guarantor is not liable for the whole loan unless the guarantee is unlimited, which you should avoid.

### Can a guarantor lose their house?

It is possible but rare. The Banking Code of Practice generally requires the lender to pursue the borrower first, including selling the borrower's property, before enforcing against the guarantor's home. The guarantor is then liable only up to the cap. If the guarantor can pay the shortfall from other funds, their house is not sold. A default that reaches this point is serious, so guarantors should act as soon as the lender notifies them of arrears.

### How do you get released as a guarantor?

Ask the lender to revalue the property. When the loan balance is at or below 80% of the current value, the lender will generally release the guarantee and discharge the mortgage over the guarantor's home. Extra repayments, a rise in value, or the borrower refinancing to a new lender without a guarantee all achieve the same outcome. There is no automatic release, so someone must request it.

### Does being a guarantor affect my own borrowing capacity?

Yes, in two ways. The mortgage over your home reduces the equity you can use, and some lenders treat the guaranteed amount as a contingent liability when assessing a new loan for you. Once the guarantee is released, both effects disappear. If you plan to refinance or buy in the next few years, tell your broker before you guarantee.

### Can a guarantor withdraw from a guarantee?

Before the loan is drawn, yes, without penalty under the National Credit Code. After the loan is drawn, only with the lender's agreement, which usually means the borrower reducing the loan or providing alternative security. A guarantor also has grounds to challenge a guarantee that was not properly disclosed, was signed under pressure, or is unjust.

## Talk to GNT Finance

If a parent or family member is willing to help you buy, the guarantee should be as small and as short-lived as possible. GNT Finance will size it correctly, choose a lender with a clear release policy, and explain the documents to everyone involved. [Book a free consultation](/contact/) or call 0426 403 703.

*This page is general information only and not legal, tax or financial advice. Laws change — confirm current rules with the State Revenue Office, the ATO or a licensed professional.*