Joint Borrower Sole Proprietor (JBSP) Mortgages
A JBSP mortgage lets a parent or close family member's income count toward affordability without putting their name on the property title — useful when credit issues or income alone limit how much you can borrow.
Get Your Free JBSP Mortgage AssessmentA Joint Borrower Sole Proprietor mortgage lets a family member’s income boost your affordability, without putting their name on the property. It’s a different arrangement to a standard joint mortgage or a guarantor mortgage: the supporting person takes on legal responsibility for the payments, but has no ownership stake or property rights.
For borrowers with bad credit, a JBSP mortgage functions primarily as an affordability mechanism rather than a way of bypassing a credit check — lenders still assess the main applicant’s history in the usual way. Where it helps is when a limited borrowing capacity, rather than the credit issue itself, is what’s holding an application back.
There are only a limited number of lenders offering this product, and most require a documented exit strategy for removing the supporting person later — a specialist broker can talk you through whether it’s the right fit.
What Lenders Look At
What it is
A JBSP mortgage allows one or more additional people — usually a parent or close family member — to be named on the mortgage and have their income count toward affordability, without being named as an owner on the title deeds.
How it differs from a guarantor mortgage
The supporting person takes on full legal responsibility for the payments, but gains no ownership stake, property rights, or typical Stamp Duty surcharge exposure.
How it helps with bad credit
It's primarily an affordability mechanism rather than a credit-bypass tool — your own credit history is still assessed — but it helps when credit issues have limited the amount you can borrow on your own.
The supporting person's position
Their own credit profile matters too, since they carry full legal liability for the mortgage payments alongside you.
Joint Borrower Sole Proprietor (JBSP) Mortgages FAQs
Who can be a joint borrower on a JBSP mortgage?
Most commonly a parent, though criteria vary by lender — some allow other close family members too.
Does the supporting person need to pay a deposit?
Usually not — the main applicant typically covers the deposit, though this can vary by lender arrangement.
Can I remove the supporting person later?
Usually, yes — typically by remortgaging once your own income and circumstances support the mortgage on your own.
Will my bad credit still be assessed if I use a JBSP mortgage?
Yes — lenders still evaluate the main applicant's credit history. A JBSP arrangement boosts affordability; it doesn't bypass a credit assessment.
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