Joint Borrower Sole Proprietor (JBSP) Mortgages
A Joint Borrower Sole Proprietor arrangement lets a family member – usually a parent – add their income to your mortgage application without going on the property title. That distinction matters more than it might sound: because they’re never an owner, there’s no second-home stamp duty surcharge to worry about, and they have no legal claim on the property itself.
We arrange JBSP mortgages for expat clients regularly, often for first-time buyers whose overseas income doesn’t stretch quite far enough under a UK lender’s standard affordability calculation on its own.
When JBSP makes sense
- Your income supports most, but not quite all, of the mortgage you need
- A parent or close family member is willing to support the application financially without becoming a co-owner
- You want to avoid the additional stamp duty that applies when a second-home owner is added to a title
The joint borrower never has to live in the property, occupy it, or have any ongoing involvement beyond being named on the mortgage. Their income is simply added to the affordability calculation.
What lenders will want from the joint borrower
Proof of income and outgoings, much like a standard applicant, plus confirmation they understand the commitment they’re taking on – they’re jointly liable for the mortgage even though they don’t own any of the property. Not every lender offers JBSP products, and among those that do, criteria on maximum age at the end of the mortgage term for the joint borrower vary quite a bit, which can matter if a parent is already in their sixties.
Our fees
£295 application fee, 1% completion fee.
Frequently Asked Questions
Does the joint borrower need to be a parent?
No, though it’s the most common arrangement. Other close family members can work depending on the lender.
Will my parent’s income be affected by interest rate changes on my mortgage?
They’re jointly liable for the mortgage, so yes, in that they’d be responsible for repayments if you couldn’t make them – it’s worth being clear about that before proceeding.
Can the joint borrower be removed later?
Often yes, once your income alone supports the mortgage, though this typically requires a full remortgage or product transfer rather than a simple form.
Does my joint borrower need to be a UK resident?
Most lenders will want the joint borrower based in the UK, though this varies – worth checking your specific situation with us.
Is there an age limit for the joint borrower?
Yes, most lenders set a maximum age at the end of the mortgage term, commonly somewhere between 70 and 85.
Get in touch with details of your income and your prospective joint borrower’s situation, and we’ll identify which lenders fit.
