Compare like with like
Use consistent borrowing, repayment and time-period assumptions.
Private-client guide · Compare the arrangement
Private-bank or mainstream mortgage?
A private-bank mortgage can be relevant to a complex case, but the right choice depends on the actual terms. Use this guide to compare the borrowing, the wider relationship and the commitments attached to each option.
One conversation to understand the property, the people and the plan.
Start with your circumstances
For borrowers weighing a private-bank proposal against other suitable mortgage routes.
Identify connected costs
Include any banking, custody or asset-management obligations.
Choose useful flexibility
Check the terms against the changes you realistically expect.
The detail behind the decision
Make room for the whole picture.
Start with the problem the mortgage needs to solve
Is the difficulty the size of the loan, irregular income, an unusual property, overseas circumstances or a need for particular repayment flexibility? Put that question first. If the income and property fit a straightforward mortgage, a more elaborate banking relationship may add little value. If the circumstances are complex, an individual assessment may be worth exploring.
Terms such as bespoke or private do not explain what you receive. Ask which part of the proposal is tailored and which parts remain standard conditions. Also establish whether the lender and product are accessible for your application route. A name appearing on a website is not evidence of an adviser’s panel or a promise that an application can be placed.
Put each proposal on the same page
Use the same borrowing amount, repayment method and comparison period where possible. If a proposal differs, record why and what that changes. Otherwise an apparently cheaper payment can conceal a different term, a larger interest-only balance or additional costs elsewhere.
| Compare | What to ask | Why it matters |
|---|---|---|
| Eligibility | Which income, property, residence and loan conditions apply? | A competitive illustration has little value if the case does not fit. |
| Total cost | What are the mortgage, advice and connected banking costs? | Costs outside the mortgage can change the comparison. |
| Asset requirements | Must funds be moved, retained or pledged? | Access to wealth and freedom to change provider may be affected. |
| Flexibility | What are the overpayment, early repayment and security-release terms? | The product needs to fit likely changes during its term. |
| Ongoing obligations | What information, balances or conditions must be maintained? | The relationship continues after completion. |
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Published lender examples show different approaches
Coutts describes considering bonuses, carried interest and equity within its residential mortgage assessment. Investec describes reviewing wider income rather than basic salary alone. HSBC publishes a high-value mortgage route. These examples show that substantial borrowing is not confined to one type of institution.
They do not establish current acceptance of your income, property or structure. Nor are they recommendations, confirmation of Jack’s access or a guarantee of any feature. Ask for the terms that apply to your proposal, with criteria checked at the point of enquiry. Avoid basing a purchase commitment on a general lender webpage.
Examine any linked asset arrangement carefully
If moving investments is part of a proposal, ask what must move, by when and under what service. Identify any transfer, custody or management costs and the consequences of changing the arrangement later. If assets are pledged as security, ask how values are monitored and what obligations arise if values fall.
These questions need the lender’s actual documents and appropriate investment or legal input. Do not compare a property mortgage with investment-backed borrowing as if the risks and protections are identical. Keeping an existing portfolio untouched may be a preference, but it is one factor among suitability, cost, access and risk.
Choose the commitments you can live with
A useful decision record explains why the preferred option fits, what extra cost or restriction it carries and which alternatives were considered. It should also say what happens at the end of the initial rate, if you sell early or if the planned liquidity event does not occur. This helps keep the decision grounded in your circumstances.
Bring any existing proposal to the conversation with its conditions, not just its rate. I can help compare the mortgage questions within the available advice scope and identify where your other advisers need to comment. You remain free to ask for simpler terms or to pause while an important condition is clarified.
A clear sequence
From your first question to the next decision.
Open each stage to understand the work involved. The sequence and timing depend on your circumstances and the lender’s assessment.
01Describe the need
Identify the feature your circumstances require before choosing a lender category.
02Obtain comparable terms
Use consistent loan assumptions and capture every material condition.
03Review connected costs
Include banking, custody or management obligations where relevant.
04Discuss the trade-offs
Consider flexibility, asset access, risks and the likely life of the mortgage.
05Record the decision
Make the preferred option, reasons and outstanding conditions clear before applying.
A useful first conversation
Bring the outline. We can build the detail together.
Use this checklist to see what you can already explain. You do not need a complete application file before getting in touch.
0 of 6 points outlined
Ticks stay on this page and clear on reload. They are not sent to Jack and do not measure eligibility. Share financial documents only through the secure route agreed with Jack.
Talk through my plansPut the questions into context
Explore the worked examples.
Fictional scenarios with transparent assumptions, alternative approaches and practical questions. They do not describe completed client transactions.
Illustrative scenarioA £3m mortgage: comparing an offset with a larger depositA fictional UHNW mortgage case study comparing cash retention, an offset arrangement and a lower loan, with transparent interest calculations.Illustrative scenarioAn £8m home and a £2.4m interest-only repayment planA fictional UHNW mortgage example testing downsizing, part repayment and investment sale options against a £2.4m interest-only balance.
Useful answers
Make the next conversation a better one.
A clear explanation of the circumstances is more useful than a wealth label or a headline borrowing figure.
Is a private bank always more flexible?
No universal promise applies. Some proposals may offer useful flexibility, but the actual product terms, underwriting and wider relationship conditions determine what is available.
Link to this answerIs the lowest mortgage rate the best comparison?
No. Include fees, remaining capital, the comparison period and any connected banking or asset costs. Different repayment structures need careful comparison.
Link to this answerWill you recommend a lender mentioned here?
Only if an individual assessment establishes suitability and access within the advice scope. The published examples are educational references, not recommendations.
Link to this answerDo private banks always require assets under management?
Requirements vary by institution and proposal. Ask for written confirmation of any transfer or retention requirement and its associated costs and conditions.
Link to this answerCan I compare a proposal I already have?
Yes. Start with the loan, rate, fees, repayment basis and all accompanying conditions. Detailed documents can follow through an agreed secure route.
Link to this answerSources and further reading
Primary sources checked 17 October 2026. Lender criteria illustrate individual policies and can change; they are not a promise of availability or acceptance. Legal, tax and investment questions need the relevant specialist’s advice.
Personal advice, directly with Jack
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General information, not a lending decision or personal recommendation. All borrowing is subject to eligibility, affordability, valuation and lender assessment. Illustrative scenarios are not completed client transactions. Mortgage advice is provided through Mortgage Force (UK) Ltd. Content updated 17 October 2026.