Guarantor Home Loan Australia 2026: How It Works

What Is a Guarantor Home Loan?

A guarantor home loan is an arrangement where a family member, usually a parent, pledges some of the equity in their own property as extra security for your loan, so you can buy with as little as a 0-5% deposit and skip Lenders Mortgage Insurance. They aren't lending you cash and they aren't covering your repayments. They're putting up a slice of their property as a backstop, which is what lets the bank treat you as if you'd saved a 20% deposit.

You'll hear lenders use different names for the same thing. Westpac calls it a Family Security Guarantee, St.George and Bank of Melbourne call it a Family Pledge, Bankwest calls it a Family Guarantee, and most others just say "family guarantee". Every major lender, including NAB, CommBank, Westpac, ANZ and Bankwest, offers a version. The branding changes; the mechanics don't.

Here's the question that's actually keeping you up at night: is your parents' home on the line? We'll answer that head-on further down, because the honest answer comes down to one structural choice (a limited versus an unlimited guarantee) that almost no one explains to you up front.

First, the upside. The reason these loans are popular is simple. Saving a full 20% deposit can feel like chasing a moving target, where prices climb faster than your savings. A guarantor arrangement bridges that gap, and it wipes out Lenders Mortgage Insurance (LMI), which for a first home buyer usually runs $10,000-$30,000. You can see roughly what LMI would cost in your situation with our LMI calculator.

How Does a Guarantor Home Loan Actually Work?

The guarantee only covers the gap between your deposit and 20% of the price. It does not cover the whole loan. That's the one fact most people get wrong, so it's worth locking in before anything else.

Step by step, here's how it runs:

1. You apply for a home loan the normal way, assessed on your own income and borrowing capacity.
2. You nominate a guarantor, usually a parent who owns property.
3. The lender assesses both of you: your ability to repay, plus your guarantor's property and financial position.
4. The lender takes a limited guarantee, registering a second mortgage over a portion of the guarantor's property to cover the gap between your deposit and 20%.
5. You settle and move in. You make every repayment. The guarantor's role is purely security; they never touch the loan.

A worked example makes it concrete. Say you're buying a $600,000 home with a $30,000 deposit, which is 5%.

• Your loan amount: $570,000
• 20% of the purchase price: $120,000
• Your deposit covers: $30,000 (5%)
• The gap: $120,000 − $30,000 = $90,000
• The lender takes a $90,000 guarantee over your parents' property
• The lender now effectively has 20% security, so you pay no LMI

On a $570,000 loan, LMI would typically cost somewhere around $18,000-$28,000, and it can run higher depending on the lender and insurer. That's real money that stays in your pocket or goes straight onto your mortgage instead.

How Much Can You Borrow with a Guarantor?

Your parents' income does not boost your borrowing power. The guarantee changes your deposit requirement, not how much the bank will lend you. That myth costs people real disappointment, so we'll say it plainly: you are assessed on your own income, expenses and debts, full stop.

What the guarantee does change is the loan-to-value ratio (LVR) you can qualify for. Without a guarantor, most lenders cap you at 80% LVR before LMI kicks in, or 95% with LMI. With a guarantor, you can borrow up to 100% LVR, and with some lenders up to 105%, because the guarantee tops your security up to 20%. The extra 5% on a 105% loan is usually set aside for stamp duty, conveyancing and other upfront costs. Not every lender offers 105%, and a mortgage broker will know which ones currently do.

It helps to know how much your parents could guarantee before you have the conversation. Lenders work out their "usable equity" like this. Say your parents own a home worth $850,000 with a $250,000 mortgage still owing:

• Property value: $850,000
• Lender's 80% ceiling: $850,000 × 80% = $680,000
• Existing mortgage: $250,000
• Usable equity available to guarantee: $680,000 − $250,000 = $430,000

That $430,000 is the theoretical maximum, but you'd rarely use all of it. For a $600,000 purchase you'd only need a $90,000 guarantee (the gap between a 5% deposit and 20%), which leaves $340,000 of their usable equity untouched.

To work out your own maximum borrowing capacity, use our borrowing power calculator. It factors in your income, HECS and expenses, so you get a real number instead of a rough multiple of your salary.

Who Can Be a Guarantor, and What Are the Requirements?

Not just anyone can guarantee your loan. Lenders have firm rules about who qualifies:

• Family members only. Parents are by far the most common. Some lenders also accept siblings, grandparents or adult children. A friend, or a partner's parent, usually won't be accepted.
• They must own property with enough equity to cover the guarantee. If your parents' home is worth $800,000 with a $300,000 mortgage, they have $500,000 in equity, which is comfortably enough for most guarantees.
• A stable financial position. Some lenders want the guarantor to show income, not just equity. This varies a lot between banks, which is exactly where a mortgage broker who knows each lender's policy earns their keep.
• Independent legal advice. Almost every lender requires your guarantor to see their own solicitor (separate from yours) and sign a Certificate of Independent Legal Advice before they're bound. This isn't a stand-alone law, but it's a requirement under the Banking Code of Practice and standard lender policy, and it's there to make sure the guarantor genuinely understands what they're taking on. MoneySmart's advice is the same: get independent legal advice before you sign.

What Are the Risks?

This is the section to read slowly, and the one your parents should read too. We've split it into the risk to you and the risk to them, because they're not the same.

The risk to your guarantor

MoneySmart puts it in one blunt sentence: being a guarantor means you may have to repay someone else's loan. Here's what that looks like in practice.

If you can't make repayments, the lender can claim against the guarantor's property. If you default and the sale of your home doesn't clear the debt, the lender can pursue the guaranteed amount against your parents' property. In the worst case, that can mean they're forced to sell their home.

Their borrowing capacity drops while the guarantee is active. The guaranteed amount sits on their finances as a liability. If they want to refinance, buy an investment property or take out any other loan, the guarantee reduces what they can borrow.

It can strain the relationship. Money and family is always complicated. If financial stress hits, a formal arrangement between parent and child piles pressure onto an already hard situation.

The risk to you

Your main risk is the ordinary one of any mortgage: if your income drops or rates rise, you still have to meet the repayments. A guarantor doesn't change that. What it adds is the weight of knowing a default puts your parents' home at risk, not just your own, which is a genuine reason to be conservative about how much you borrow.

The reassuring part: most arrangements use a limited guarantee, capped at a set dollar figure (the $90,000 in our example, not the whole loan), so your parents' exposure is contained. And most guarantors are released within a few years, commonly two to five, once you've built enough equity. (That timeline is a general industry estimate, not a fixed rule.)

For the Guarantor: Read This Before You Say Yes

If you're the parent being asked, this part is for you. Saying yes is a big deal, and you're allowed to take your time. A short checklist before you sign anything:

• Ask for the loan contract early. Don't agree in principle and read the detail later. Get the actual documents, and ask questions until the loan amount, the guaranteed amount, the interest and the fees all make sense to you.
• Run the hard test. Could you afford the full repayments yourself if your child couldn't pay? If the honest answer is no, that's worth knowing before you sign, not after.
• Get independent legal advice. MoneySmart recommends seeing a lawyer (or getting free legal advice) before you sign, so you understand exactly what you're agreeing to. Most lenders require this anyway.
• Watch for pressure. MoneySmart is explicit on this: if someone is pressuring you to go guarantor, that can be a sign of financial abuse, and support is available. A genuine request can wait while you think it through. Pressure to sign quickly is a red flag.

You can read the full guidance, including free financial-counselling options, on MoneySmart's going guarantor on a loan page. It's the independent, government-run source, and it's worth ten minutes of your time.

Limited Guarantee vs Full Guarantee: Always Insist on Limited

This is the single most important structural decision in a guarantor loan, and one your parents' solicitor should lock in before anything is signed. There are two types, and the gap between them is enormous.

A limited guarantee is capped at a specific dollar amount, usually the exact gap between your deposit and 20% of the price. In our earlier example that cap was $90,000. If you default and the lender sells your property, the guarantor's liability stops at that capped figure, even if the shortfall after sale is larger.

A full (unlimited) guarantee exposes the guarantor to the entire loan. If you borrowed $570,000 and the property sold short by $150,000, the lender could pursue your parents for the full $150,000, not just the $90,000 gap. In the worst case, the whole loan amount is on the line.

Before signing, make sure these four things are documented in writing:

• The exact dollar amount of the guarantee (for example, "$90,000")
• The specific property used as security (address and title reference)
• The release conditions, typically once the loan hits 80% LVR
• Any fees for releasing the guarantee later

Your parents' independent solicitor should check every one of these. If any are vague or missing, the arrangement isn't ready to sign.

How to Release (or Remove) Your Guarantor

A guarantor arrangement isn't forever. Once you've built enough equity, you can apply to have the guarantee removed entirely. Here's how to release or remove a guarantor from a home loan:

1. Get your loan down to 80% LVR. LVR is your loan balance divided by your property's value. Once it drops to 80% or below, the lender has enough security from your property alone and no longer needs the guarantee.

2. Property growth helps too. You don't have to get there through repayments alone. If your property rises in value, your LVR falls automatically. If you bought at $600,000 and it's now worth $700,000, your $540,000 loan balance is 77% LVR, already under the 80% threshold.

3. Request a formal release. Contact your lender and ask for a guarantor release. They'll order a valuation to confirm your LVR. Some lenders charge a small fee for the release and valuation (illustrative figures run around $200-$500, depending on the lender), and others do it for free.

As a rough guide, many first home buyers release their guarantor within a few years, commonly two to five. If you bought in a growth area and kept up consistent repayments, it can be sooner. Treat that as an estimate, not a promise; it depends entirely on your repayments and your local market.

Guarantor Loan vs the Government 5% Deposit Scheme: Which Is Better?

The Australian Government 5% Deposit Scheme (previously the First Home Guarantee, and before that the Home Guarantee Scheme) lets you buy with as little as a 5% deposit and no LMI, with the government acting as your guarantor instead of a family member. Single parents and eligible guardians can go in with as little as 2%. Since 1 October 2025 it has had unlimited places and no income caps, so qualifying is far easier than it once was. So how does it stack up against a family guarantor?

The price caps matter, because they're the main thing that pushes people toward a guarantor instead. As a guide, the capital-city and regional-centre caps are around $1.5 million in NSW, $950,000 in Victoria, $1 million in Queensland and the ACT, and $900,000 in South Australia, with lower caps in regional areas and other states. These figures change, so confirm the current cap for the exact place you're buying using the postcode tool on firsthomebuyers.gov.au before you rely on any number. Not sure whether you'd qualify at all? Our first home buyer eligibility checker walks you through it.

For most first home buyers, the 5% Deposit Scheme is the cleaner path. You get the same LMI saving with no family risk attached. A guarantor loan is the better choice when you're buying above the scheme's price cap for your area, or when you want to put in 0% rather than 5%. Outside those cases, the government scheme is usually the simpler option.

Check the grants and schemes page, or your state grants page, for the current first home buyer support in your area.

Guarantor Home Loan with No Deposit

Yes, it's genuinely possible to buy in Australia with zero deposit using a guarantor. Not every lender will do it, but several will. In a no-deposit guarantor loan, your guarantor covers the entire 20% security gap rather than just the part above your deposit. On a $600,000 property that means a guarantee of $120,000 (20% of the price) instead of $90,000 (the gap above a 5% deposit).

What "no deposit" does not mean is "no money needed". You still need cash for the costs around the purchase. Typical ranges look like this:

• Stamp duty. Even with first home buyer concessions, most states still charge some duty above certain thresholds. Check your likely bill with our stamp duty calculator, and your state's concession thresholds on the grants page.
• Conveyancing or settlement fees, typically around $1,200-$2,500. A good conveyancer is worth every cent.
• Building and pest inspection, usually $400-$900 (see our building and pest inspection guide).
• Lender application and valuation fees, anywhere from $0 to about $800 depending on the lender.
• Moving costs, basic furniture and utility connections. Budget a few thousand more.

For a "no deposit" purchase, the total upfront cash you'll need is typically somewhere around $5,000-$25,000, depending on your state and whether first home buyer stamp duty concessions apply. These are typical industry ranges, not fixed figures, so treat them as a planning guide. If saving a full 5% deposit plus costs feels out of reach, the no-deposit route can still work, but it does need some savings behind you.

Some lenders also offer a 105% LVR loan, which rolls stamp duty and fees into the loan itself. That pushes your borrowing above the property's value, which means higher repayments and a longer wait to reach 80% LVR and release your guarantor. Use it only as a last resort. A mortgage broker will know which lenders currently offer 100% and 105% guarantor loans, because that list changes as lenders adjust their risk settings.

Is a Guarantor Home Loan Right for You?

A guarantor loan might be a good fit if:

• You have stable income and can comfortably afford the repayments, but haven't saved a 20% deposit yet
• Your parents or another family member own property with enough equity and are genuinely willing to help
• You'd rather buy sooner than spend years saving a full deposit while prices keep moving
• You want to avoid paying $10,000-$30,000 in LMI

It might not be right if:

• Your income is unstable, or you're not confident about meeting repayments long-term
• Your parents' property is heavily mortgaged with limited equity
• The family relationship could be strained by a financial arrangement
• You qualify for the 5% Deposit Scheme and your purchase price sits under the cap

The best first step is getting pre-approval. It tells you exactly how much you can borrow, with or without a guarantor, so you're deciding on facts rather than guesses.

Worth weighing up before you commit to a guarantor loan:

• First Home Super Saver Scheme, which lets you save your deposit faster inside super with tax benefits
• Keystart home loans (WA only), which offer a 2% deposit, no LMI and no guarantor needed
• Tracking your deposit toward a slightly larger figure, which can open up more lenders without family involvement
• Just paying LMI, which (at roughly $18,000-$28,000 on a $570,000 loan, possibly more) may be the cleaner option if the guarantor route would add too much family stress

One thing worth knowing about us: NestPath is free and independent. We don't sell loans and we don't get paid by any lender, so there's no version of this where we earn more by steering you toward a guarantor loan, or away from one. The right answer is whichever one genuinely fits your situation. When you're ready to compare real options, you can use our mortgage repayment calculator to see what the numbers look like, then talk to a broker.

Frequently Asked Questions

Can my parents be guarantor for my home loan?

Yes, parents are the most common guarantors for home loans in Australia, and they need to own property with enough equity to cover the guarantee (usually the gap between your deposit and 20% of the price). Both parents will need independent legal advice before signing, and the lender will assess their financial position as part of your application. Some lenders also accept siblings or grandparents.

How much deposit do I need with a guarantor?

As little as 0-5%, depending on the lender, because the guarantor covers the gap between your deposit and 20% so the lender can waive Lenders Mortgage Insurance. Most lenders prefer you to contribute at least 5% from genuine savings, but some accept 0% with a strong guarantor. A mortgage broker can pinpoint which lenders offer the best terms for your deposit level.

How much can I borrow with a guarantor?

How much you can borrow with a guarantor is based on your own income, expenses and debts, not your guarantor's, so the guarantee changes your deposit requirement rather than your borrowing capacity. You can typically borrow up to 100% of the property value, and up to 105% with some lenders, where the extra 5% covers stamp duty and fees. Use our borrowing power calculator for an estimate based on your real position.

Can I get a home loan with no deposit using a guarantor?

Yes, a guarantor home loan with no deposit is possible with several Australian lenders, where the guarantor covers the full 20% security gap instead of just the part above your deposit. You'll still need cash for stamp duty, conveyancing, building and pest inspection and moving costs, typically around $5,000-$25,000 depending on your state. Some lenders offer 105% LVR loans that roll stamp duty and fees into the loan, but that raises your repayments and delays releasing your guarantor.

Is a guarantor home loan better than the 5% Deposit Scheme?

For most first home buyers, the Australian Government 5% Deposit Scheme (formerly the First Home Guarantee) is the better option, because you get the same benefit, avoiding LMI with a 5% deposit, without putting your parents' property at risk. Since October 2025 it has had unlimited places and no income caps, so qualifying is easier than before. A guarantor loan wins when you're buying above the scheme's property price caps in your area, or when you want to buy with 0% deposit. Beyond those cases, the scheme is usually the cleaner path.

What happens if I can't pay my mortgage with a guarantor?

If you default, the lender can make a claim on the guarantor's property for the guaranteed amount, and in the worst case that can force the sale of their home. Most arrangements use a limited guarantee, capped at a set dollar amount rather than the full loan, which contains the guarantor's exposure. This is exactly why both you and your guarantor should fully understand the risks, get independent legal advice, and be confident you can afford the repayments before proceeding.

How long does a guarantor stay on a home loan?

Often a few years, commonly two to five, though it's an estimate rather than a fixed rule. Once you've built enough equity to reach 80% LVR on your own, through a mix of repayments and property growth, you can apply to your lender for a formal guarantor release. The lender orders a valuation to confirm your LVR, and if you're at or below 80% they remove the guarantee. Some lenders charge a small fee for this; others do it for free.

What's the difference between a limited guarantee and a full guarantee?

A limited guarantee is capped at a specific dollar amount, usually the gap between your deposit and 20% of the price (for example, $90,000), and the guarantor's exposure stops there. A full (unlimited) guarantee exposes the guarantor to the entire loan. Always insist on a limited guarantee, because every reputable Australian lender offers one, and walk away if a lender proposes an unlimited one. Your parents' solicitor should confirm the dollar amount, the security property and the release conditions are all in writing before signing.

How risky is it to be a guarantor?

The main risk is that if the borrower can't pay, the lender can pursue the guaranteed amount against your property, and in the worst case force its sale. As MoneySmart puts it, going guarantor means you may have to repay someone else's loan. The risk is contained by a limited guarantee (which caps your liability to a set figure), by getting independent legal advice before you sign, and by the fact that the guarantee is usually released once the borrower's loan reaches 80% LVR. If anyone pressures you into it, treat that as a warning sign.

Is it easy to get approved for a guarantor home loan?

It can be easier on the deposit and LVR side, because the guarantee removes the LMI barrier and lets you buy with a much smaller deposit. But you're still assessed on your own income, expenses and serviceability, so a guarantor doesn't fix weak borrowing capacity. If you can comfortably afford the repayments and your guarantor has enough equity, approval is realistic; if your serviceability is shaky, a guarantor alone won't get you over the line.