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I want to buy a larger property in my name only, is my partners income considered?

Answered on 9 March 2026

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I want to buy a larger property in my name only, is my partners income considered?

Answered by: Nicholas Mendes

In most cases, no. If you’re buying the property in your name only and your partner is not going on the mortgage, a lender won’t include their income in the affordability assessment.

That’s because the mortgage is a legal contract. If your partner isn’t a borrower, the lender can’t rely on their income.

When your partner’s income can be used

If you need your partner’s income to increase borrowing, there are a couple of common routes.

Joint borrower, sole proprietor (JBSP)

This is usually the most practical option.

  • Both of you go on the mortgage (so both incomes can be used)
  • Only you go on the title deeds (so you’re the legal owner)

It can work well where you want the property owned in one name, but need the second income to pass affordability.

The trade-off is important: your partner becomes jointly and severally liable, meaning the lender can pursue them for the full mortgage if payments aren’t made.

A guarantor-style arrangement

Classic guarantor mortgages are much rarer now. Some lenders offer variants (often family-assist style), but they’re less common and can be stricter.

In most “partner income support” cases, JBSP tends to be the cleaner solution if it’s available.

Things to think about before choosing JBSP

Because your partner is helping service the mortgage but won’t own the property, you should treat the legal side carefully.

It’s sensible to:

  • take independent legal advice
  • consider a declaration of trust / cohabitation agreement so contributions are documented
  • be clear on what happens if you split up, or if one person stops paying

What if you don’t want your partner on the mortgage at all?

Then you’re back to a single-applicant mortgage, and borrowing is based on:

  • your income (and any provable additional income you receive)
  • your commitments and credit profile
  • the property and loan-to-value

Your partner can still contribute to household costs, but it won’t help you “on paper” with the lender.

If you’d like to find out more then call us on 023 8235 2300 and we’ll arrange a convenient time for one of our consultants to get in count with you, to explain things further.

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Ask The Mortgage Experts answers are based on the information provided and do not constitute advice under the Financial Services & Markets Act. They reflect the personal views of the authors and do not necessarily represent the views, positions, strategies or opinions of John Charcol. All comments are made in good faith, and John Charcol will not accept liability for them. We recommend you seek professional advice with regard to any of these topics where appropriate.

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