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Joint Borrower Sole Proprietor Mortgages

Boost your clients’ borrowing power with the support of a sponsor.

Whether your client is buying their first home, moving after a change in circumstances, or returning to the market after a break, JBSP helps increase borrowing power by combining their income with that of a sponsor. It’s a flexible solution for those who need a little extra support to make their next move.

Who is JBSP for?

JBSP is ideal for clients who:

  • Are first time buyers, home movers or remortgaging
  • Need additional income support to meet affordability
  • Are buying on their own after a change in circumstances
  • Are returning to the market after a break.

Who qualifies as a sponsor?

A sponsor is usually a close relative (but we can consider other relationships), who is added to the mortgage as a co-borrower.

To qualify, a sponsor must:

  • Be a residential owner-occupier, living in the UK
  • Have a minimum income of £40,000
  • Be no older than 80 on repayment or 75 on interest only and part & part, at the end of the term 
  • Be jointly and individually liable for the full mortgage amount.

Why choose JBSP with us?

We offer a practical and supportive approach to JBSP cases, including:

  • Up to 95% LTV (including fees)
  • Maximum loan of £1,500,000
  • Up to four applicants - only sponsor and highest earner’s income assessed
  • Minimum income requirements:
    • Sponsor: £40,000
    • Highest earning applicant: £20,000 (no minimum if they're a student)
  • Purchases and remortgages on both repayment and interest only
  • Applicants must not own any other property at completion
  • Sponsor must be UK based residential owner-occupier
  • One bank account for monthly payments.

Where the term extends into retirement, refer to our lending criteria.

Borrowing power:

Borrowing power on your own

Applicant 1 income Applicant 2 income Borrowing power
£25,000 n/a £112,500

As a single applicant, you could borrow £112,500

Borrowing power with JBSP

Applicant 1 income Sponsor income Borrowing power
£25,000 £50,000 £375,000

With the help of a sponsor, you could borrow £375,000.

Find out how much your client could borrow with our JBSP calculator.

Borrowing power with a partner

Applicant 1 income Applicant 2 income Borrowing power
£32,000 £28,000 £300,000

As joint applicants, you could borrow £300,000

Borrowing power with JBSP

Applicant 1 income Sponsor income Borrowing power
£32,000 £80,000 £560,000

With the help of a sponsor, you could borrow £560,000.

Find out how much your client could borrow with our JBSP calculator.

Next steps?

Explore our full Residential lending criteria

To check your client's suitability for JBSP take a look at our lending criteria

Lending Criteria

Use our JBSP calculator

To see how much your client could borrow with the help of a sponsor, use our JBSP calculator

JBSP Calculator

Search our JBSP product range

To see all our current rates for JBSP visit our Residential products page

Residential Products
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