Quick answer
Guaranteeing a family member's business loan means promising to repay it if their business doesn't. If the guarantee is secured by your home, your home is at risk too. Before agreeing, understand the amount, whether the guarantee is limited, how you'd be released and the business's real prospects. Get independent legal advice. Sometimes there are safer ways to help, such as a smaller limited guarantee or a documented loan.
Key points
- A guarantor can be required to repay the whole guaranteed amount if the business defaults.
- A guarantee secured by your home puts your home at risk for someone else's business.
- Ask for the guarantee to be limited and understand how you'd be released.
- Independent legal advice protects you and the relationship.
- Your role
- Guarantor, not borrower
- Risk
- Repaying if the business doesn't
- Safer options
- Limited guarantee, smaller amount
- Must do
- Independent legal advice
It usually starts with a phone call or a conversation over dinner. Your son is buying into a plumbing business. Your sister wants to open a second salon. Your partner’s company needs a loan and the lender wants “someone else” behind it. They ask if you’d be willing to be a guarantor.
You love them. You want the business to succeed. And you probably haven’t been told, in plain words, what you’d actually be signing up for. This page does that.
What does being a guarantor mean?
A guarantor promises to repay a debt if the borrower doesn’t. The business — or your family member — is the borrower. You’re the backstop.
If the business keeps up its repayments, you may never hear about the loan again. If it doesn’t, the lender can call on your guarantee and ask you to pay what it covers. If you also gave a mortgage over your home, the lender may be able to enforce that security.
What could it cost you?
| Situation | What it can mean for you |
|---|---|
| Unlimited guarantee | You may be liable for the full debt, plus costs and fees under the loan |
| Limited guarantee | Your liability is capped at the agreed amount |
| Guarantee secured by your home | Your home can be at risk if the guarantee isn’t paid |
| “All monies” wording | The guarantee may cover other debts the business owes that lender |
| You can’t pay when called on | Recovery action, damage to your credit file and, in the worst case, bankruptcy |
AFSA explains that in bankruptcy “your house and other property may be sold” and your name will “permanently appear on the National Personal Insolvency Index”. That’s the far end of the scale — but it’s why a guarantee deserves serious thought.
What should you ask before agreeing?
- How much is the loan, and what is it for?
- Is my guarantee limited? To how much?
- Is my home, or any other property, being used as security?
- Does the guarantee cover only this loan, or other debts too?
- What does the business’s trading actually look like? Ask to see statements or a summary from their accountant.
- What’s the plan if the business struggles?
- How and when will I be released? On repayment, after a set period, or after a refinance?
A lender or lawyer can explain the documents. Your family member should be comfortable with you asking all of these — they’re asking you to share their risk.
Why is independent legal advice important?
Many lenders require guarantors to get independent legal advice, particularly when the guarantor isn’t involved in the business. It gives you a private, professional explanation of your obligations, separate from the person asking for help. It also protects the relationship: if something goes wrong, nobody can say you didn’t understand.
Are there safer ways to help?
Often, yes. Worth considering:
- A limited guarantee for a smaller, fixed amount.
- A smaller loan with the business contributing more of its own funds.
- Security from the borrower’s own property rather than yours.
- A documented family loan — you lend a set amount you can afford to lose, on written terms, rather than guaranteeing an open-ended debt. Your accountant and lawyer can advise.
- An unsecured business option sized on the business’s own turnover, which may not need a family guarantor at all — see business loans without using your home.
If your family member hasn’t yet looked at all their options, they can enquire with us and we’ll tell them honestly whether a guarantor is really needed for what they want to do.
What if you’re asked to guarantee a partner’s business?
The same principles apply, with an extra layer: you likely share a home and finances. If the home is jointly owned, you’ll probably be asked to sign a mortgage as well as a guarantee. Read borrowing against a home in joint names and our guide on money rules for couples in business.
Illustrative example: A retired couple are asked by their daughter to guarantee a $200,000 loan to buy into a physiotherapy practice, secured by their mortgage-free home. After independent legal advice, they agree to a guarantee limited to $60,000, secured by their home, on the condition that their daughter’s own savings and an unsecured facility cover the rest. They also ask to be released once the loan balance falls below a set level.
How do you get released later?
A guarantee generally ends when the debt is repaid or the lender agrees to release you. Release often happens through a refinance once the business can stand on its own. Ask about this at the start and put a review date in the diary. Our guide on releasing a personal guarantee explains the usual paths.
How do you say no kindly?
If it isn’t right for you, it’s fine to say so. Explain that it’s about your own security, not a lack of faith in them, and offer the help you can give — time, contacts, a smaller documented loan, or simply support while they explore other options.
Help your family member find the right loan
The kindest thing you can do might be to make sure your family member gets proper, honest advice about their options. Their enquiry takes about 60 seconds with no credit check. It stays with one specialist — no spraying across a list of lenders — who will call to talk it through, including whether a guarantor is genuinely needed. Accurate answers on the form mean we can find the right structure the first time, possibly without putting your home in the picture.
Frequently asked questions
Will I have to pay if my family member's business fails?
If the business defaults, the lender can call on your guarantee according to its terms, and you may need to pay what the guarantee covers.
Can I guarantee only part of the loan?
Sometimes. A limited guarantee caps your liability at a set amount. Not every lender offers it, but it's always worth asking.
Can I see the business's financial position before I agree?
You should ask to. As a guarantor you're taking on real risk, and understanding the business's trading and plans is reasonable.
How do I stop being a guarantor?
Usually only when the loan is repaid or the lender agrees to release you, often through a refinance. Ask how release works before you sign.
Is saying no the wrong thing to do?
No. It's a legitimate decision. There may be other ways to help, and a family member's business shouldn't depend on you taking on risk you're not comfortable with.