Each person’s finances
Prepare income evidence, credit history and commitments for everyone. A supporting borrower’s existing mortgage, loans and household spending still matter.
Mortgage advice for buyers and supporting borrowers
A JBSP mortgage may let someone support your borrowing without becoming an owner of your home. Understand the commitment on both sides before deciding whether it suits your plans.
Free initial consultation by phone or online. Further fees vary by case. Advice and fees
Your home may be repossessed if you do not keep up repayments on your mortgage.
More than one person is responsible for the mortgage, while a supporting borrower is not a legal owner of the property. A common example is a parent joining an adult child’s application while the child owns the home.
The lender can consider acceptable income from the borrowers, alongside their commitments and other criteria. This may help with affordability, but it does not guarantee a larger loan or approval.
“Sole proprietor” describes one owner. Some lenders also use JBSP terminology for arrangements with two owning borrowers and additional non-owning borrowers. Check the structure allowed by the actual product.
JBSP may be considered by first-time buyers, home movers or existing homeowners, depending on the lender. A parent helping a child is common, but accepted relationships differ: some products permit wider family members or friends.
Prepare income evidence, credit history and commitments for everyone. A supporting borrower’s existing mortgage, loans and household spending still matter.
Check how each applicant’s age, proposed retirement and pension income affect the term. There is no universal maximum age or income multiple.
Confirm the property’s location, type, price, intended owners and occupants. Do not assume the supporting borrower can live there; occupancy rules vary.
Our self-employed mortgage guide covers variable business income. For credit concerns, use the bad-credit mortgage page and explain the relevant entries before an application.
No. Adding acceptable income and providing a deposit solve different parts of the application. Deposit requirements depend on the lender, property and circumstances. Family money must be disclosed as a gift, loan or other arrangement, as appropriate.
A standard online affordability estimate is not a JBSP assessment. An adviser needs the finances of all proposed borrowers; simply adding salaries can give a misleading budget.
Examples checked on 7 September 2026 include NatWest’s Family-Backed Mortgage and Skipton’s Income Booster. These are examples, not a recommendation or a complete lender list. Availability, relationships, deposit limits and legal requirements must be checked for your application. Similar product names do not mean identical terms.
Being willing to help and being able to carry the commitment are separate questions. Have the conversation before property offers or application fees create pressure to proceed.
The mortgage commitment can affect a future loan or remortgage of your own. Tell the adviser about your existing home, retirement plans and any borrowing you expect to need.
Agree who expects to pay each month and how you will notice a missed payment. Your private arrangement does not restrict the lender’s rights. Arrears can affect the borrowers’ credit records.
A supporting borrower does not become a legal owner simply by joining the mortgage or contributing money. Do not assume that payments buy a share of the home or its future sale proceeds. Disclose any intended ownership interest to the solicitor and lender.
Discuss illness, unemployment, bereavement and relationship changes. Consider savings and suitable protection alongside the legal arrangements, rather than assuming another family member will take over.
Independent legal advice is an important part of the process. Lenders commonly require it for non-owning borrowers. Check who must provide it, when it is needed and its cost. It should give the supporting borrower space to understand the documents and decide freely, separate from the buyer’s wishes.
| Arrangement | What the helper provides | What to check |
|---|---|---|
| JBSP | Joins the borrowing without becoming a legal owner. | Full debt responsibility, affordability, legal advice and a realistic exit plan. |
| Gifted deposit | Gives money towards the purchase. | Whether it is genuinely a gift, accepted donor rules and evidence of the source. |
| Savings-backed mortgage | Offers savings as security under the product terms. | How long funds are tied up, circumstances in which they can be used and conditions for release. |
| Guarantor arrangement | Gives a guarantee whose scope is set by the agreement. | Liability, any security at risk and the conditions for ending the guarantee. |
| Joint purchase | Shares borrowing and ownership. | Ownership shares, tax treatment and what happens if someone wants to leave. |
Read the existing gifted-deposit guide, family springboard page and guarantor mortgage page for related routes. Ask for a current product check before relying on any provider example. These arrangements are not interchangeable.
A non-owning borrower is different from a purchaser, but JBSP is not a blanket exemption from property tax. Your solicitor or tax adviser must consider who acquires an interest, any beneficial ownership, existing property interests and relevant spouse or civil-partner rules.
SDLT applies in England and Northern Ireland, LBTT in Scotland and LTT in Wales. First-time buyer definitions and reliefs differ. Use our UK first-time buyer property-tax guide for the wider context, then have your own transaction checked.
Allow for conveyancing, any independent legal advice, surveys, lender charges, advice fees and moving costs as well as the deposit. Compare the overall mortgage cost, not just the rate. Any fee added to the loan can attract interest.
There is no automatic release when a fixed rate ends or after a set number of payments. The remaining borrower must meet the lender’s requirements, or obtain a suitable replacement mortgage that repays the existing debt. Approval and costs need checking at the time.
Set a review point and discuss what would happen if the buyer’s income does not increase as hoped. A plan that depends entirely on a future pay rise or house-price growth is uncertain.
Removing a non-owning borrower does not necessarily change ownership, so it is not automatically a transfer of equity. Adding or removing an owner is a different legal question. See our guide to mortgages in one name for the distinction, and ask the lender and solicitor about the proposed change.
Explain who would own, borrow and live in the home, their relationship, the approximate price and deposit, and whether this is a purchase or remortgage.
Have income, commitments, existing mortgage details and expected retirement dates ready. The document checklist is a starting point; exact evidence varies.
Compare suitable routes and understand the helper’s obligations. An agreement in principle is provisional and does not settle the legal arrangements.
Complete the required assessment and legal advice before signing. The full application remains subject to underwriting, evidence and property checks.
We can discuss your circumstances, check relevant lender requirements and explain suitable options where available. Ask your adviser about the scope of the lender search and why a recommendation fits both the buyer and supporting borrower. We do not guarantee approval or future release from the mortgage.
The initial consultation is free. Fees for further work vary by case and are agreed before chargeable work begins. A processing fee may apply separately from an offer fee and is not charged in every case. We may also receive lender commission. Request the fees, payment stages and refund terms in writing; see our Terms of Business. Independent legal advice is a separate service and may carry its own fee.
Some lenders allow this, but it is not a universal rule. Their existing mortgage, household costs and other commitments still need assessment. Being a non-owning borrower is different from buying a share of the new property.
Some lenders accept friends or wider family relationships; others restrict who can support the application. Check the proposed relationship, residence and ownership arrangement before relying on a particular product.
No automatic override applies. Lenders assess the relevant applicants and their credit histories. Explain defaults, missed payments or a limited credit history before applying, so the whole case can be checked.
A fixed-rate expiry does not release anyone from the mortgage. The lender must agree to remove the borrower, or a suitable replacement mortgage must repay the existing one. Affordability, legal requirements and costs need checking at that time.
Joining the mortgage does not itself give inheritance rights. Ownership is dealt with through the estate and applicable succession rules, while mortgage obligations must also be addressed. Discuss wills and protection with appropriate advisers and contact the lender if a death occurs.
Potentially, if the lender accepts their income and the other criteria are met. Each applicant needs suitable evidence of earnings and commitments. The type of business, trading history and income pattern can affect the assessment.
That may be possible, subject to lender and legal checks. Disclose the contribution and whether it is a gift, a loan or linked to an ownership expectation. Do not use a gift declaration to conceal an agreement to repay the money.
Tell us whether you are the buyer or the person considering support, and what you want to understand. Start with a short outline; keep financial documents for an agreed secure route.
Reviewed 7 September 2026. General UK information, not a personal mortgage, legal or tax recommendation. Further sources: Suffolk Building Society’s JBSP explanation and HMRC’s SDLT first-time buyer definition. Lender conditions and individual tax treatment need checking when you apply.
Your home may be repossessed if you do not keep up repayments on your mortgage.
