A Joint Borrower Sole Proprietor (JBSP) mortgage allows two or more people to be named on the mortgage while only one person owns the property. All borrowers are responsible for the mortgage repayments, but only the sole proprietor is named on the property’s title deeds.

With a JBSP mortgage, a family member or other eligible applicant can support the mortgage application using their income to improve affordability. The supporting borrower helps secure the mortgage but does not own the property.

Only the sole proprietor owns the property and appears on the title deeds. Supporting borrowers are named on the mortgage but do not have legal ownership of the property.

JBSP mortgages are commonly used by:
• First-time buyers
• Buyers with limited affordability
• Parents helping children purchase a home
• Family members supporting relatives onto the property ladder
• Applicants seeking sole ownership while receiving affordability support

Yes. One of the most common uses of a JBSP mortgage is where parents help support their child’s mortgage application by contributing their income to the affordability assessment.

Potentially, yes. Depending on lender criteria, other family members such as siblings, grandparents, or close relatives may be able to support a JBSP mortgage application.

Yes. JBSP mortgages are particularly popular with first-time buyers who may not currently meet affordability requirements on their own.

The amount you may be able to borrow will depend on factors such as:
• Combined income of all borrowers
• Existing financial commitments
• Credit history
• Deposit size
• Property value
• Lender affordability criteria
Each lender will assess applications individually.

Yes. All borrowers named on the mortgage are jointly and individually responsible for ensuring the mortgage repayments are made.

This depends on the lender and the specific mortgage arrangement. Some lenders allow this, while others may have restrictions.

Potentially, yes. Because the supporting borrower is named on the mortgage, the commitment may be taken into account when they apply for future credit or borrowing.

Yes. Self-employed applicants may be eligible for a JBSP mortgage, subject to lender criteria and supporting documents such as accounts, tax calculations, and bank statements.

Some lenders may consider applicants with previous credit issues. Options depend on the nature of the credit issue, how long ago it occurred, affordability, and lender criteria.

No. A JBSP mortgage makes the supporting applicant a joint borrower on the mortgage, whereas a guarantor mortgage works differently depending on lender criteria.

Potential benefits include:
• Improved affordability
• Increased borrowing potential
• Sole ownership of the property
• Family support without shared ownership
• Greater flexibility for first-time buyers

• All borrowers are responsible for repayments
• Future borrowing may be affected for supporting borrowers
• Age restrictions may apply
• Independent legal advice may be required
• Not all lenders offer JBSP mortgages

Yes. Depending on your circumstances and lender criteria, you may be able to remortgage or move to a standard mortgage arrangement.

Potentially, yes. If affordability can be demonstrated independently, some lenders may allow restructuring through remortgaging or product transfer.

Lenders may request:
• Proof of identity
• Proof of address
• Payslips
• Bank statements
• Employment details
• Proof of deposit
• Tax calculations and accounts (if self-employed)
All borrowers will usually need to provide supporting documentation.

The timescale varies depending on lender, valuation, legal work, and documentation. It may take around 4–8 weeks from application to completion.

A JBSP mortgage may be suitable if you need additional affordability support but want to remain the sole owner of the property. The best option depends on your income, deposit, commitments, and long-term goals.