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We'll take the time to understand your circumstances, review your objectives and explore the options available to you before you decide whether you want to proceed.
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Once instructed, we'll manage the process from application through to completion, liaising with lenders, solicitors, valuers and other professionals involved in the transaction to help secure the funding you require.
Read our latest expert analysis covering mortgage rates, lender criteria, property market trends, buy-to-let, bridging finance, development finance, expat lending and specialist property finance.
As interest rates began to stabilise and edge lower, many borrowers expected a corresponding improvement in mortgage affordability. Lower rates should, in theory, mean lower monthly payments and increased borrowing capacity.
In 2026, that expectation is proving misleading.
At Willow Private Finance, we are consistently seeing borrowers with strong incomes and clean credit profiles surprised by how little their borrowing power has improved. In some cases, affordability even appears tighter than it was during higher-rate periods.
This disconnect is not accidental. It reflects a fundamental shift in how lenders assess affordability following the volatility of recent years.
The key misunderstanding is the assumption that affordability calculations are driven primarily by product rates.
In reality, most lenders base affordability on stressed assumptions rather than the actual rate a borrower will pay. These stress rates were increased significantly during the 2023–2024 period and, crucially, have not been reduced in line with easing rates.
In 2026, lenders remain focused on long-term resilience rather than short-term affordability. Even where rates are lower today, lenders continue to assess whether borrowers could withstand future increases or sustained economic pressure.
As a result, lower rates provide comfort—but not generosity.
In previous cycles, stress testing moved with the market. When rates rose, stress buffers widened; when rates fell, they relaxed.
That relationship has broken down.
In 2026, stress testing is no longer a temporary safeguard. It is a permanent control embedded into lender risk frameworks. Many lenders now assess affordability at rates significantly above current products, regardless of the direction of travel.
This change alone explains why affordability feels stubbornly constrained, even as headline pricing improves.
Another major factor is how lenders assess living costs.
Even where borrowers demonstrate modest real-world spending, lenders apply standardised expenditure models that reflect post-pandemic cost realities. Utilities, food, insurance, transport, and childcare assumptions are all materially higher than they were pre-2024.
These assumptions are applied consistently, meaning high earners are not immune. In fact, higher incomes often attract higher assumed expenditure, further eroding affordability.
Borrowers frequently underestimate how much these models reduce borrowing capacity before income is even fully considered.
For borrowers with bonuses, commission, dividends, or self-employed income, the effect is amplified.
In 2026, lenders are more cautious about income that fluctuates, even when historic performance is strong. Averaging periods are longer, exclusions are more common, and underwriters are less willing to assume future continuity.
This means two borrowers with the same headline income may experience very different affordability outcomes depending on how that income is earned, as explored in our article on why buyers with the same income receive different mortgage offers.
Affordability is no longer just about income versus mortgage payment.
Lenders now examine wider financial behaviour more closely. Existing loans, car finance, credit cards, and even habitual overdraft usage materially affect affordability outcomes.
In 2026, lenders are less willing to “net off” consumer debt against high income. Instead, they treat ongoing commitments as structural liabilities that reduce resilience, regardless of repayment history.
This is one reason borrowers often feel affordability has tightened without any obvious change in their circumstances.
From a borrower’s perspective, affordability feels artificial. Many can comfortably manage repayments at today’s rates, even with margin to spare.
From a lender’s perspective, affordability is about protecting against scenarios where conditions deteriorate. The models used in 2026 are designed to answer a different question: not “Can this borrower pay today?” but “How likely is this borrower to struggle under pressure?”
This philosophical shift explains much of the frustration borrowers experience.
We regularly see borrowers with six-figure incomes who expect borrowing capacity to increase as rates ease. Instead, they encounter the same or lower limits than before.
The reason is almost always stress testing combined with cost assumptions. Once these are applied, headline income becomes far less powerful than borrowers expect.
Without proactive structuring or lender selection, affordability ceilings remain stubbornly fixed.
The key adjustment borrowers must make is to stop viewing affordability as a function of rate movement alone.
In 2026, affordability is shaped by stress models, behavioural analysis, income sustainability, and cost assumptions. Rates matter—but they are only one component of a much larger assessment.
Borrowers who understand this are better placed to plan, restructure, or adapt their approach rather than waiting for affordability to “improve” organically.
Willow Private Finance advises clients based on how affordability is actually assessed, not how it appears on rate tables.
We identify lenders with more flexible stress models, structure applications to present income and commitments effectively, and advise on when restructuring debt can materially improve outcomes.
This is particularly valuable for high earners, self-employed borrowers, and clients navigating large or complex transactions in a constrained affordability environment.
Why hasn't my borrowing capacity increased even though mortgage rates have fallen?
Lower mortgage rates do not automatically lead to higher borrowing limits. In 2026, most lenders continue to assess affordability using higher stress rates and conservative financial assumptions rather than the actual interest rate you'll pay. As a result, borrowing capacity has remained relatively constrained despite improving mortgage pricing.
Do lenders use my actual mortgage rate when calculating affordability?
Usually not. Most lenders apply a notional or "stress" interest rate that is higher than the product rate to assess whether you could continue to afford your mortgage if interest rates or living costs increased in the future.
Why do lenders assume my household spending is higher than it actually is?
Many lenders now use standardised expenditure models that reflect today's cost of living rather than relying solely on your personal spending habits. These models include assumptions for housing costs, utilities, food, transport, insurance and other household expenses, which can reduce the amount you're able to borrow.
Does earning a higher salary guarantee I can borrow more?
Not necessarily. While a higher income can increase borrowing potential, lenders also apply higher assumed expenditure and more detailed affordability checks. As a result, many high-income borrowers find their borrowing capacity is lower than they expected.
Are self-employed borrowers affected more by today's affordability rules?
Yes. Self-employed applicants, company directors, contractors and those with variable income often face additional scrutiny. Lenders may average income over longer periods or apply more cautious assessments to bonuses, dividends and fluctuating earnings, reducing the amount available to borrow.
Do credit cards, loans and car finance affect mortgage affordability?
Yes. Lenders now place greater emphasis on your overall financial commitments. Personal loans, credit card balances, car finance and other regular repayments all form part of the affordability calculation and can reduce your maximum borrowing, even if you've never missed a payment.
Why do I feel I can comfortably afford the mortgage when the lender says I can't?
Lenders are assessing future financial resilience rather than your current ability to make the monthly payments. Their affordability models are designed to determine whether you could continue to afford the mortgage if interest rates increased or your circumstances changed, which often produces a more conservative result than your own budgeting.
Will affordability improve automatically if mortgage rates continue to fall?
Not necessarily. While lower rates may help in some cases, many of the stricter affordability models introduced after 2024 have become permanent features of lenders' underwriting. Unless those models change, borrowing capacity may not increase significantly even if rates fall further.
Can choosing a different lender improve my affordability?
Yes. Every lender has its own affordability model, stress testing methodology and approach to assessing income and expenditure. Some lenders are more accommodating than others, particularly for higher earners, self-employed applicants or borrowers with more complex financial
circumstances.
How can a specialist mortgage broker help maximise my borrowing capacity?
A whole-of-market mortgage broker understands how different lenders assess affordability and can identify those whose criteria best match your circumstances. They can also structure your application effectively, present complex income clearly and recommend strategies that improve your borrowing potential without compromising your long-term financial objectives.
If you're surprised by how much you can borrow—or frustrated that falling rates haven't improved your options—you don't have to navigate today's lending criteria alone.
Contact Willow Private Finance today for a free, no-obligation consultation. We'll assess your affordability using current lender criteria, compare the whole market and help you secure the most suitable mortgage solution for your circumstances and future plans.
Tailored advice for individuals, businesses and professional advisers seeking sophisticated financial solutions.
At Willow Private Finance, we understand that every client has different ambitions, financial circumstances and long-term objectives. Whether you are purchasing property, refinancing existing borrowing, protecting your family or business, or looking to unlock wealth through specialist lending, we build solutions around your individual needs rather than forcing you into standard products.
As an independent, whole-of-market brokerage, we provide access to residential mortgages, buy-to-let finance, bridging loans, development finance, commercial lending, private banking and Lombard lending facilities, alongside a comprehensive range of personal and business protection solutions. Our expertise extends to UK and international clients, high-net-worth individuals, company directors, investors, expatriates and borrowers with complex financial structures.
By combining deep technical expertise with relationships across mainstream lenders, specialist lenders and private banks, we help clients secure funding, structure borrowing efficiently and protect the assets, income and people that matter most. Whatever stage of your financial journey you are at, our team is here to provide clear, strategic advice that delivers confidence and long-term value.
About the Author
Wesley Ranger is the Director of Willow Private Finance and has over 20 years’ experience advising clients on UK and international property finance. He specialises in affordability structuring, complex income cases, and helping borrowers navigate lender risk models in changing market conditions.
Important Notice
This article is for general information purposes only and does not constitute personal financial advice. Mortgage affordability assessments, stress testing, and lending criteria vary by lender and may change at any time.
Your eligibility will depend on your individual circumstances and lender policies. Always seek tailored advice before committing to any financial arrangement.
Willow Private Finance Ltd is authorised and regulated by the Financial Conduct Authority (FCA No. 588422). Registered in England and Wales.
