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Joint Borrower, Sole Proprietor Mortgages: Who They’re For & When They Work

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If you’re struggling with affordability on your own, you might have come across something called a Joint Borrower, Sole Proprietor (JBSP) mortgage. It’s a mouthful, but the idea is simple: someone else can help you borrow more, without owning any share of the property.

In this guide, we’ll break down how JBSP mortgages work, who they’re best for, and when they can be a smart solution.

What Is a Joint Borrower, Sole Proprietor Mortgage?

A JBSP mortgage allows an extra person (usually a parent or close family member) to go on the mortgage but not on the property deeds.

This means:

  • They share responsibility for paying the mortgage.

  • They don’t own any part of the home.

  • They’re not caught by the extra 3% stamp duty surcharge that applies to second-home ownership.

It’s basically a way to boost affordability without adding someone as a legal owner.

Why Would Someone Use a JBSP Mortgage?

To Increase Borrowing Capacity

If your income doesn’t stretch far enough on its own, a second applicant’s income can help you borrow more. This is especially common for:

  • First-time buyers facing high house prices

  • Single applicants

  • People with lower or inconsistent income

To Get on the Ladder Earlier

Instead of waiting to increase income, build savings or pay off debts, a JBSP mortgage can speed up the process.

To Avoid Family Members Owning Part of the Home

Parents often want to help, but don’t want to be tied to the property legally. JBSP works perfectly here.

To Avoid Stamp Duty Surcharge

If a parent went on the deeds, they may pay the additional 3% stamp duty. JBSP avoids this because the helper isn’t a legal owner.


Who Are JBSP Mortgages Ideal For?

JBSP is most commonly used by:

 First-time buyers

Especially young professionals whose incomes haven’t caught up with house prices in their area.

Parents helping adult children

This is by far the biggest category. Parents can use their income to support the mortgage while the child owns the home.

Couples where one partner has lower income or credit issues

If one person can’t go on the mortgage (credit, affordability, past financial issues), they can still live in the property while the other partner and a helper apply.

Single parents

Where one income alone isn’t enough to meet lender affordability models.

 Older borrowers

Sometimes adult children go on the mortgage to help parents downsize or move, though lenders vary on age limits.


How a JBSP Mortgage Works (Step-by-Step)

  1. Borrower + helper(s) apply for the mortgage together.

  2. Lender assesses all incomes, commitments and credit files.

  3. Only the main buyer (the sole proprietor) goes on the property deeds.

  4. The mortgage offer names all applicants, who share the legal responsibility for the loan.

  5. Everyone must pass affordability, credit, age criteria and take independent legal advice.

  6. Over time, the helper can often be removed from the mortgage when affordability improves.


Pros of a JBSP Mortgage

  • Boosts affordability significantly

 

  • Can help you borrow more than you could alone.

 

  • No extra stamp duty for the helper

 

  • Parents, siblings or partners help without owning part of the home

 

  • Flexible exit — they can come off later

 

  • Good for long-term affordability growth

 

  • Perfect for careers with strong income progression.

Cons to Consider

  • All borrowers are legally responsible for the full mortgage

 If payments are missed, everyone’s credit file is affected.

  • Age limits can restrict mortgage terms

If the helper is older, their age may reduce the maximum mortgage term.

  • The helper’s borrowing may be affected

Their income is tied to this mortgage, which can limit their future applications.

  • Some lenders require legal advice

Independent legal advice is often mandatory for the non-owner borrower.


When Does a JBSP Mortgage Work Best?

When the main buyer’s income is rising

For example, early-career roles with strong salary progression.

When the helper has stable, strong income

Often a parent or relative with good credit and minimal debts.

When other options don’t fit

Such as when:

  • A guarantor mortgage isn’t available

  • A gifted deposit still isn’t enough

  • A partner can’t go on the mortgage

When avoiding stamp duty surcharge matters

A JBSP mortgage can work really well when one partner already owns a property and the couple want to buy a home together, but don’t want the existing property to trigger the additional 3% stamp duty surcharge.
Instead of adding the partner who already owns a property to the deeds, they can simply go on the mortgage to support affordability — avoiding the second-home tax charge.


When JBSP Might Not Be Suitable

  • If the helper wants to own part of the home → Joint mortgage may be better.

  • If the helper is near retirement → affordability may be restricted.

  • If the buyer’s income won’t realistically improve → removal later may be hard.

  • If multiple applicants already have commitments → affordability may still fall short.


Can the Helper Be Removed Later?

Yes — this is one of the best parts of JBSP mortgages.

Once the main borrower’s income improves, or once debts are reduced, you can request a remortgage or product transfer to remove the helper.


Is a JBSP Mortgage Right for You?

Every situation is different. A JBSP mortgage can be incredibly helpful for buyers who need extra support to get onto the property ladder, but it isn’t right for everyone.

Speaking with a broker gives you personalised guidance, checks lender criteria, and helps you choose the right solution for your circumstances.


Need Advice?

If you’d like to explore whether a JBSP mortgage could work for you, we’re happy to help.

Get in touch and we can run through your options, affordability and the lenders offering JBSP products right now.

The UK mortgage market continues to evolve, with another recent interest rate reduction. Great news for borrowers. In this comprehensive UK mortgage market update for February 2025, we delve into the latest trends shaping the lending landscape, the impact of recent central bank policies, and what borrowers can expect moving forward. This in-depth analysis draws on insights from industry experts, including perspectives from Bright Money Independent (BMI Money), providing borrowers with a clear picture of the UK mortgage market.

Economic Context and Interest Rate Environment

February 2025 has witnessed a complex interplay between global economic pressures and domestic monetary policy, with the Bank of England playing a pivotal role. Following a period of cautious rate adjustments over the past year, the central bank’s recent decisions have now begun to bear fruit in the mortgage sector. Although inflation remains a concern, the BOE recently reduced interest rates to 4.5%. This UK mortgage market update highlights that many lenders are now offering slightly more competitive rates, a trend that could encourage both first-time buyers and those looking to remortgage.

The inflationary pressures that dominated headlines in previous years have begun to subside, thanks in part to coordinated fiscal policies and a recovering global economy. In February 2025, consumer price inflation has eased, allowing the Bank of England to adopt a more measured approach towards interest rate hikes. This cautious stance has provided some relief to mortgage borrowers, who have been grappling with higher monthly repayments for several quarters.

Amidst these shifts, the fixed-rate mortgage segment continues to be highly attractive. Lenders are increasingly offering long-term deals that lock in competitive rates, providing a level of financial predictability in an otherwise volatile market. Conversely, variable-rate products have also seen adjustments, reflecting a more optimistic economic outlook tempered by persistent uncertainties in global markets. Talk with BMI Money to find the most suitable mortgage product for your needs.

Mortgage Lender Strategies and Product Offerings

As the economic environment evolves, mortgage lenders are also adapting their product offerings to meet the diverse needs of borrowers. The competitive nature of the market has spurred financial institutions to innovate, leading to a broader array of mortgage products designed to accommodate varying risk appetites and financial situations.

One notable trend in this UK mortgage market update is the increased emphasis on hybrid mortgage products. These innovative deals combine the stability of fixed rates with the flexibility of variable-rate options, allowing borrowers to benefit from lower initial rates while retaining the opportunity to capitalise on future market improvements. Such products are particularly appealing to those uncertain about long-term financial commitments in a shifting economic climate. Talk with BMI Money if this sounds of interest.

Lenders have also introduced more flexible repayment options, recognising that today’s borrowers value adaptability. From interest-only mortgages designed for investment properties to offset mortgages that link repayments to savings or investment accounts, the diversity in product offerings means that borrowers can now find solutions that more closely match their financial profiles and goals.

Furthermore, the market has seen a trend towards digitalisation. Traditional brick-and-mortar lending institutions are increasingly supplementing their offerings with online platforms that streamline the application process, enhance transparency, and provide real-time updates on application status. This digital transformation not only enhances customer experience but also improves operational efficiency, allowing lenders to respond more swiftly to market demands.

For those seeking expert advice, BMI Money can assist. Leveraging both traditional expertise and modern digital tools, BMI Money has been instrumental in guiding clients through the complexities of the current mortgage landscape.

Borrower Trends and Challenges

Borrowers in February 2025 are navigating a landscape that is both promising and challenging. The easing of interest rate pressures has provided some much-needed relief, yet many still face hurdles related to affordability, deposit requirements, and stringent credit checks. This UK mortgage market update reveals that while the market is gradually recovering, the path to home ownership remains fraught with obstacles, especially for first-time buyers.

One of the most significant challenges is the high level of deposits required by many lenders. Despite recent improvements in mortgage rates, the deposit thresholds remain steep, making it difficult for younger buyers to enter the market. However, government initiatives aimed at boosting first-time home ownership are slowly beginning to yield positive results. These schemes, designed to lower the entry barriers, are helping a growing number of prospective buyers secure the necessary funding for their first home.

Another area of concern is the tightening of lending criteria. In response to past financial crises and an unstable global economy, many lenders have adopted more rigorous standards to assess borrower risk. This has led to a more selective process, where applicants must demonstrate strong credit histories and stable incomes. For those who fall short of these criteria, remortgaging or obtaining new financing can be particularly challenging.

Despite these obstacles, there is a silver lining for borrowers. The renewed confidence among some lenders is evident in the way mortgage products are being restructured to offer greater flexibility. For instance, there has been an uptick in the availability of products that allow for overpayments without incurring heavy penalties. This shift is especially beneficial for borrowers who wish to accelerate their mortgage repayments and reduce the overall interest burden over time.

The market has also seen an increase in the demand for advisory services. With the complexities of the current mortgage environment, many borrowers are turning to mortgage brokers for personalised guidance. BMI Money, in particular, has gained recognition for its ability to provide tailored solutions that address individual financial circumstances. By partnering with experts who understand the nuances of the market, borrowers can make more informed decisions that align with their long-term financial goals.

Expert Opinions and Future Outlook

Expert opinions in February 2025 paint a cautiously optimistic picture of the UK mortgage market. Analysts are pointing to several factors that could influence the market’s trajectory over the coming months, from economic recovery signals to the ongoing digitalisation of mortgage services. This section of our UK mortgage market update explores these expert insights and offers predictions for the future.

A recurring theme among economists is the gradual stabilisation of interest rates. While global uncertainties continue to exert some pressure, the Bank of England’s measured approach is expected to maintain a relatively stable rate environment in the near term. Experts believe that if inflation continues to ease and consumer confidence improves, we could see a further moderation in mortgage rates by mid-2025. This outlook is bolstered by recent market data indicating that both fixed and variable rate products are becoming more accessible to a broader range of borrowers.

Mortgage brokers, such as BMI Money, and financial advisors are also optimistic about the long-term prospects for the housing market. They point to the gradual recovery in housing supply and demand as a positive sign. For instance, first-time buyers who have been sidelined by high deposit requirements are now beginning to benefit from government schemes and innovative lender products. These developments, coupled with more flexible repayment options, are expected to stimulate demand and foster a healthier mortgage market overall.

Innovation in mortgage product offerings is another area of interest. The advent of hybrid products, digital application platforms, and tailored mortgage solutions is revolutionising the way consumers approach home financing. Industry leaders like BMI Money are at the forefront of this change, leveraging technology to offer personalised advice and competitive deals. This proactive approach not only enhances customer satisfaction but also positions the company as a key player in an increasingly competitive market.

As borrowers become more financially literate and aware of the intricacies of mortgage products, they are better equipped to make informed decisions. This shift towards greater transparency and understanding is expected to drive market efficiencies and ultimately lead to more sustainable lending practices.

Looking ahead, experts agree that the UK mortgage market will likely continue to evolve in response to both domestic and international factors. Economic recovery, coupled with ongoing regulatory adjustments, will create a dynamic environment where innovation and consumer protection go hand in hand. While challenges remain—particularly around affordability and regulatory compliance—the overall sentiment is one of cautious optimism, with many foreseeing a period of stability and moderate growth throughout 2025.

Navigating the Market with Professional Advice

For borrowers looking to make the most of these market trends, expert guidance is essential. With the complexities of the current environment, professional advice can help identify the best mortgage products and negotiate favourable terms. Mortgage brokers like BMI Money are uniquely positioned to offer such guidance, combining deep market knowledge with a personalised approach that addresses individual financial circumstances.

The role of mortgage brokers has become even more critical as the market continues to evolve. They act as intermediaries between borrowers and lenders, ensuring that clients are not only informed about the latest market developments but also supported through every step of the application process. By providing tailored solutions and leveraging relationships with multiple lenders, BMI Money helps clients navigate the often complex and competitive landscape of the UK mortgage market.

Moreover, professional advice can be particularly valuable in an environment where regulatory changes and market innovations are the norm. For instance, understanding the nuances of new mortgage products or the implications of digital lending platforms requires expertise that goes beyond what is typically available through standard online searches. Experienced brokers are able to assess a borrower’s unique financial situation, recommend the most suitable products, and negotiate terms that reflect both current market conditions and long-term financial goals.

Whether you are a first-time buyer or an experienced homeowner looking to remortgage, partnering with a knowledgeable broker like BMI Money can make all the difference in securing a favourable mortgage.

Conclusion

The February 2025 UK mortgage market update reveals a sector in transition. With moderate improvements in interest rates, a diverse range of product offerings, and evolving regulatory frameworks, the market presents both opportunities and challenges. As economic conditions gradually stabilise and digital innovations continue to reshape the industry, borrowers have much to gain from professional advice and tailored mortgage solutions.

For those seeking expert guidance, Bright Money Independent offers an ideal service for both new and existing borrowers. Whether you are navigating the intricacies of fixed versus variable rates, assessing new mortgage products, or simply looking to make an informed decision, now is the time to stay informed and act decisively.

In this dynamic market, understanding the latest trends is essential. We encourage you to contact us at BMI Money for personalised advice and further information. Our expert team is ready to help you take advantage of the opportunities that February 2025 has presented, ensuring you remain well-informed and ahead of the curve in your mortgage journey.