How to Be a Mortgage Guarantor

Guarantor mortgages were primarily for first-time buyers. They allowed parents or other family members to act as a guarantor for the borrower, without being a named owner of the property. The guarantor agreed to meet the monthly capital and interest payments in case the borrower couldn’t. Guarantor mortgages were repayment-based loans. Repayment mortgages are where you pay back a portion of your mortgage loan each month, together with the interest.

Various lenders had guarantor products for first-time buyers, although the rules differed from lender to lender. Some allowed a parent or guardian, a grandparent, a spouse or other relative to be a guarantor. However, other lenders only allowed the parent, guardian or grandparent of the borrower to be a guarantor.

It’s pretty similar with joint borrower sole proprietor. We explain this in detail below.

Although it was possible to find 100% loan-to-value guarantor mortgage products, most lenders required at least a 5% deposit. As well as the borrower, the lender examined the guarantor’s income as part of their affordability assessment during the application process.

Guarantor products have been replaced by a similar mortgage arrangement called a joint borrower sole proprietor. Joint borrower sole proprietor mortgages allow relatives to help the borrower apply for a larger loan by including their income as part of the mortgage application, without being included on the title deeds.

The main difference between guarantor mortgages and joint borrower sole proprietor is that with a joint borrower sole proprietor mortgage, the sponsor supporting the application is deemed to be a full borrower in all respects. This means all borrowers are equally responsible for the mortgage and receive the same updates from the lender, but the sponsor has no ownership over the property - hence joint borrower sole proprietor.

In contrast, a guarantor mortgage simply required the sponsor to take over monthly capital and interest payments if the borrower couldn’t.

The main benefit of joint borrower sole proprietor mortgages is the same as with guarantor products: it increases the overall affordability of the application. This means you can likely borrow more money and buy a more expensive house.

For both guarantor mortgages and joint borrower sole proprietor, any first-time home buyers on the mortgage application remain eligible for the Stamp Duty exemption, as the joint borrowing relative – often an existing homeowner - will not be named on the title deeds of the house.

An additional benefit of this type of mortgage is that if you’re supporting a first-time buyer’s mortgage application and you already own a property, neither party will be required to pay the Stamp Duty surcharge that’s applied on second homes.

The short answer is yes. Although guarantor mortgages aren’t available anymore, their replacement - joint borrower sole proprietor - is becoming more attractive to people on all sorts of incomes with different circumstances. This is because they allow the lender to consider additional forms of income for affordability, thereby increasing your maximum borrowing and making it more likely you’ll be able to afford a property.  

A guarantor was required to sign a contract as part of the mortgage application in which they agreed to make the monthly payments if the borrower couldn’t. They didn’t need to provide security against the loan and were not on the title deeds of the property.

With joint borrower sole proprietor, all borrowers are equally responsible for making the monthly payments. The sponsor supporting the application doesn’t need to put up any security against the loan and is not on the title deeds of the property.

The main thing to bear in mind is that the person supporting the application has no ownership rights to the property.

Any sponsor – e.g. parent, step-parent, relative, etc. – supporting the mortgage application as guarantor or joint borrower is credit checked during the mortgage application process. Lenders will require a high score and a good credit history. A better credit rating will ensure there’s a greater likelihood that the application will be approved. The credit check performed on the sponsor is a hard credit check. Multiple hard credit checks can affect your credit score. Companies checking the guarantor’s or joint borrower’s credit history in the future will see this search query.

You can be a sponsor for a family member even if you already have a mortgage on your home. The lender will evaluate the sponsor’s disposable income as part of their overall affordability assessment, considering the sponsor’s own mortgage payments. Buy-to-let mortgages are ignored as they should be self-funding investments.

We don’t really get guarantor mortgages anymore. However, acting as a sponsor on a joint borrower sole proprietor mortgage application can affect you getting a mortgage. The reason behind this is that, although you don’t have any right to the property, you’re still a borrower on the application which will affect how the lender assesses your affordability and what you can potentially borrow.

As guarantor mortgages don’t exist anymore, you can’t be a guarantor for a rental property.

However, there are some lenders that may allow a joint borrower sole proprietor arrangement on a rental property. They come with a lot more caveats than when you get this type of arrangement on a main residence and what you can borrow is based on expected market rental rather than the income of the borrowers. This means that getting a joint borrower sole proprietor arrangement on a rental property wouldn’t allow you to borrow more. Instead, this kind of arrangement can offer certain tax benefits to certain people.

For more information on this, speak to an accountant or tax adviser.