How Long Does a Guarantor Stay on a Home Loan?

When a parent agrees to go guarantor, the first question is what it could cost them. The second, always, is how long they are stuck with it.

The answer is more precise than most people expect.

What Triggers Release

A guarantee exists to lift your total security above the 80 per cent mark. Once your loan falls to roughly 80 per cent of your property’s value on its own, the guarantee has done its job and can be discharged.

That is the trigger. Not a fixed number of years, not the guarantor reaching a certain age — a loan-to-value ratio.

How Long That Takes on a Local Mortgage

Buying at the Newcastle and Lake Macquarie median house of $1,059,758 with a 5 per cent deposit:

Eleven and a half years is longer than most families picture when they sign. It is worth saying out loud at the start rather than discovering later.

But that figure assumes you do nothing except pay the minimum, and that the property does not move.

Three Things That Bring It Forward

1. Extra repayments

Every additional dollar of principal moves release closer, and early extra repayments count for far more than later ones because they cut the interest compounding on top.

The fortnightly trick works here too. Paying half your monthly repayment every fortnight quietly adds a thirteenth monthly repayment each year. We explain the version that works — and the common one that does not — in weekly, fortnightly or monthly repayments.

2. The property rising in value

Release is assessed against the property’s current value, not what you paid. If your home is revalued higher, you hit 80 per cent sooner without repaying anything extra.

The reverse is also true, and it is worth being honest about right now: local values have fallen for four consecutive months. A falling market pushes release further away. We covered what has happened suburb by suburb in four months of falling values and what two more rate rises mean.

3. A lump sum

An inheritance, a bonus, the sale of a car — anything that reduces the balance. Because the release threshold is a fixed dollar figure once the valuation is set, a lump sum translates directly into time.

Release Is Not Automatic

This is the part that surprises people. Hitting 80 per cent does not release your guarantor by itself. You have to apply. The lender will usually require a fresh valuation, will reassess that you can service the loan on your own, and will then discharge the guarantee and release the security over the guarantor’s property.

It is worth diarising. Plenty of guarantees sit in place for years after they could have been removed, simply because nobody asked.

Can You Refinance to Remove a Guarantor?

Yes, and sometimes that is faster than waiting. If your loan-to-value ratio has improved enough — through repayments, growth, or both — refinancing to a new lender without the guarantee achieves the same result and may get you a sharper rate at the same time.

It only works if you can service the loan on your own and the valuation supports it. Our refinancing in Lake Macquarie page covers what falling values do to a refinance, which is directly relevant here.

What Your Guarantor Should Ask For

• A limited guarantee, in writing, capped at a stated dollar figure — not the whole loan.
• Clarity on what triggers release, in the loan documents rather than in conversation.
• Confirmation of what they must do when the time comes, and what it will cost.

Lenders require guarantors to get independent legal advice before signing, and these are exactly the points that advice should cover.

Frequently Asked Questions

Work Out Your Own Timeline

The guarantor calculator will show you the release threshold for your purchase and roughly how long it takes on scheduled repayments. Our guide to guarantor home loans covers the rest of the structure.

If your parents are weighing this up, David is happy to talk it through with them directly — and will say plainly if the government 5% deposit scheme would do the same job without involving their home.

Want to talk through what this means for your situation? Call David on 0417 676 191 or get in touch via our contact form.

This article is general information only and does not take into account your objectives, financial situation or needs. Figures are illustrative and current as at the date of publication. Interest rates, lender policies and government scheme rules change — please seek advice specific to your circumstances before acting.

Sources

• ASIC Moneysmart, Going guarantor on a loan, last updated 9 September 2026.
• Median values and the four-month decline: Cotality Home Value Index, as reported by the Newcastle Herald, 31 August and 4 September 2026.
• Loan, release threshold and timing figures are calculated on a 30-year principal and interest loan at the rate stated, assuming scheduled repayments and no change in property value.
• Release conditions vary between lenders. Confirm the specific requirements in your loan documents.