Saga Mortgages look at what they are and how they work.
If your loved one doesn’t have a big enough income or deposit to buy a home, a guarantor mortgage could help. Your financial support (acting as a guarantor) can boost their affordability and reassure the lender that payments will be made.
Although a guarantor assumes ultimate responsibility for payments, you won’t own a share of your loved one’s home. It will belong just to them.
For home buyers who can’t raise a large enough deposit, or whose income simply isn’t enough, getting you to be a guarantor could be a solution.
Important - As with any mortgage, this is a loan secured against your home. If you can’t keep up with your monthly payments, you or your loved one may lose your home.
A guarantor mortgage functions much like a standard mortgage with monthly payments required over the course of the term. The main difference is how you secure the loan.
If the mortgage is secured using savings, you put money into a savings account held by the lender. It works by a guarantor depositing 10% of the property’s total value into a designated savings account, which is then used in lieu of your loved one supplying a down payment.
The savings are held by the lender as security for the mortgage for a set period of time, normally five years. At the end of the fixed period, you will get your savings back plus any accrued interest, as long as your loved one has made their repayments each month.
Two types of guarantor mortgage that use savings as security are:
When the mortgage is secured using your home, it will be used as collateral if your loved one is unable to make payments. The lender will try to find ways to resolve a difficult situation. But as a last measure, you will be asked to repay any debt if the home on the mortgage is repossessed.
Another option is a deposit boost, where you unlock money from your home with a small mortgage. The money released can go towards the deposit, giving your loved one more spending power.
A deposit boost is not technically a guarantor mortgage because the guarantor is not liable for future repayments. But it’s another way for loved ones to help with home purchases.
An income boost could also be used to support your loved one’s mortgage application. Your income is not actually used to fund the purchase. It simply boosts the borrowing power of your loved one.
You will not be named as a co-owner of your loved one’s home. But you may need to contribute financially if your loved one misses monthly repayments in the future.
With a family springboard mortgage, you put 10% of the home purchase price in a special savings account. Your loved one can also deposit up to 9.9% or nothing at all.
After a fixed period, if all mortgage payments have been made, the lender will return your savings plus any interest accumulated. You can help more than one loved one buy a home at the same time. And you can grow your savings in the process.
Due to the costs involved and inability to access savings for a length of time, family springboard mortgages don’t suit everyone. But they could be an option worth considering.
Another solution is a joint borrower sole proprietor mortgage. It’s also known as a JBSP mortgage or income boost. It allows you to join your loved one on their mortgage to boost the amount they can borrow.
You agree to be jointly responsible for the payments without being listed on the property deeds. Your loved one becomes the sole owner, and you will avoid any hefty stamp duty bills if you move home in the future.
A deposit boost allows you to gift money to a loved one to boost their buying power. It works by taking out two mortgages:
If you own a property and want to help a loved one buy their first home, a gifted deposit boost could be worth considering. Your loved one could secure a lower interest rate thanks to the bigger deposit. And the balance of your loan doesn't have to be repaid until your loved one sells their property.
Anyone has the potential to be a guarantor on a mortgage, but it's normally a parent, family member or friend. There are some things you should consider first:
Saga Mortgages offers a range of ways to help boost the buying power of your loved ones.
We partner with Tembo – an award-winning digital mortgage broker – who could help you to achieve your family’s property goals. You’ll access friendly advice and hundreds of mortgage deals, which could save you money and boost your budget.
It doesn’t take long to see what might be possible for you and your family. Simply register your details and answer a few questions. You'll see personalised examples of products, costs and interest rates, and have the chance to discuss things further.
Your home may be repossessed if you fail to repay your mortgage. Saga Money may receive payment from Tembo if you get a mortgage offer via the Saga Mortgages service. This will not affect the amount you pay for the service.
Saga is a registered trading name of Saga Personal Finance Limited, which is registered in England and Wales (company number 3023493). Registered office 3 Pancras Square, London, N1C 4AG. Saga Personal Finance Limited is authorised and regulated by the Financial Conduct Authority under the registration number 178922.
Tembo Money Limited (12631312) is a company registered in England and Wales with its registered office at 18 Crucifix Lane, London, SE1 3JW. Tembo is authorised and regulated by the Financial Conduct Authority under the registration number 952652. Tembo Money was awarded Best Mortgage Broker at the British bank awards in 2022, 2023, 2024 and 2025.
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