self-employed27 October 2026

What is a private bank mortgage, and who is it for?

Private banks assess your whole financial picture, not just your payslips. Here is what that means in practice, who benefits, and when it is not the right fit.

6 minNathan LawesLawes Financial

A small lit greenhouse seen from outside at dusk, warm gold light glowing through each glass pane against a deep blue sky, a single plant silhouette visible inside. — Plate 43 · Managed carefully, behind glass. Made in the Lawes Darkroom.

Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it.

Independent, whole of market
Fully remote, in the UK or abroad
FRN 1046161

Published 27 October 2026. Figures correct as at this date.

Private bank mortgages occupy a part of the market that many people come across only at a certain point in their financial lives — and some who might benefit from them do not know they qualify. This article explains how private bank lending works, who it tends to suit, and the situations where it is not the right tool.

Who are private bank mortgages for, and when are they not the right fit?

Private bank mortgages are designed for borrowers whose financial picture is too complex for a standard lender to process cleanly — often people whose income comes from sources a high-street underwriter struggles to handle. Bonuses that dwarf the base salary. Share awards that vest over several years. Partnership drawings that fluctuate. Profits from one or more businesses. Sometimes income in more than one currency. We typically arrange private bank loans from around £1 million to £5 million.

A high-street lender uses a formula. The formula needs a clean number. If your income does not produce one — or if your last two years' tax returns do not reflect what you actually earn — the formula underestimates you, and the loan you qualify for is smaller than your financial position warrants.

A private bank works differently. A person reads the file. That person looks at your assets as well as your income, your trajectory as well as your history, and the overall relationship you might bring to the bank — not just the mortgage in isolation.

What does "the relationship requirement" actually mean?

The relationship requirement means private banks often expect you to hold savings, investments or assets with them, not only a mortgage. It varies by institution, but the expectation is typically that a meaningful portion of your broader wealth — an investment portfolio, cash deposits, or both — will sit with the bank once the relationship is established.

For some borrowers that is a natural fit. If you are consolidating banking relationships anyway, or if your existing investment arrangements are not doing much for you, the requirement is not a burden. For others, it means moving money that is already well-managed, which carries its own costs and disruption. That calculation is worth doing before you approach a private bank — and speaking to an accountant before you move investments is sensible, given the potential tax consequences.

The relationship requirement also tends to mean slower decisions. There is no automated approval. A relationship manager needs to assemble your case, present it internally, and get sign-off. For borrowers under timing pressure — competing for a property at auction, for instance — that pace can be a problem.

Nathan’s take

People think private banking is only for the super-rich. It isn't. If you're borrowing over a million and your income comes in bonuses, shares or a business, you may already be exactly the client a private bank wants. You just need to be introduced the right way.

Is interest-only lending available through a private bank?

Interest-only lending is available from many private banks where a credible repayment plan exists. The repayment plan needs to be plausible and documented: an investment portfolio of sufficient size, a future liquidity event, proceeds from a business sale. It needs to make sense on paper, not just in principle.

For borrowers whose cash flow is strong but whose capital is tied up in a business or illiquid assets, interest-only can make the monthly position significantly more comfortable.

That said, the risk is real and worth naming plainly. If the repayment vehicle — the portfolio, the exit, the sale — does not perform as planned, the capital remains outstanding at the end of the term. The debt does not reduce while you hold it on interest-only terms. That is the trade-off, and it matters.

When is a private bank mortgage not the right fit?

A private bank mortgage is not right for all borrowers at this loan size. There are several situations where it is worth pausing before pursuing that route.

If your income is straightforward — a reliable salary, consistent and well-documented self-employed earnings — a specialist high-street or private lender may assess you cleanly and offer comparable terms without the relationship requirement. The flexibility of a private bank is valuable when you need it; when you do not, you may be taking on complexity for no gain.

If you need a fast decision, a private bank is unlikely to be the right vehicle. Bespoke underwriting takes time.

If you are not prepared to move any assets to the bank, the conversation may stall. Some private banks will consider a mortgage as a standalone transaction, but many will not — and the terms on a standalone deal, where available, may not reflect the pricing you were hoping for.

Private banks are also not uniformly cheaper. Bank Rate is 3.75% (Bank of England, 17 September 2026), and lenders across the market price around that. Some private bank rates are competitive with the high-street equivalents; some are not. The value in private banking tends to come from how income is assessed and how the loan is structured, not from a lower headline rate. Comparing a private bank mortgage with a high-street product on rate alone — across different terms, fee structures and flexibility — will not give you an accurate picture.

How does a broker help in this part of the market?

Knowing which private banks will realistically consider your case — and approaching them in a way that presents your position clearly — makes a material difference. Private banks do not work from a public rate card. Their appetite for different income types, nationalities, structures and asset profiles varies, and it shifts. Some will lend to UK buyers living overseas; others will not consider it. Some are well set up for foreign-currency income; others less so.

A broker who works regularly in this market can narrow the field before you approach anyone, which matters because a poorly prepared approach to the wrong institution does not just fail — it can close a door that might otherwise have been open.

The first step is usually a conversation about how your income is structured and what you are trying to achieve. That shapes which route makes sense: a private bank, a specialist lender, or something in between.

If your situation sounds like the kind of case private banks are built for — or if you are not sure whether it does — a 20-minute call is a practical place to start. You can book one at lawesfinancial.com/book. There is no charge for the initial conversation, and no commitment to proceed.

Figures quoted are illustrative only. Your actual outcome will depend on your individual circumstances, loan size, term, and the products available to you.

This is not financial advice. Speak to an independent mortgage broker before making any decisions.

Lawes Financial Limited (FRN 1046161) is an appointed representative of Andrew Charles Consulting Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 304904).

Questions self-employed borrowers ask

How much do you need to earn to get a private bank mortgage?

There is no universal income threshold, but private banks are typically looking for borrowers with a strong overall financial picture — substantial assets, complex or high income, or both — rather than a straightforward salary figure. We typically arrange private bank loans from around £1 million to £5 million, and the bank will want to understand your full financial position, not just what you earn on paper.

Do private banks offer interest-only mortgages?

Many private banks will consider interest-only lending where a credible repayment plan exists — an investment portfolio, a future liquidity event, or proceeds from a business sale, for example. The plan needs to be plausible and documented; vague intentions are unlikely to satisfy an underwriter. The risk is that if the repayment vehicle underperforms, the capital remains outstanding at the end of the term.

Can you get a private bank mortgage if you live abroad?

Some private banks will consider UK buyers who are resident overseas, particularly where there is an existing banking relationship or significant assets under management. The criteria vary considerably between institutions, and not all will lend to non-UK residents. A broker who works regularly in this space can identify which banks are realistic options for your situation before you approach them.

Is a private bank mortgage cheaper than a high-street one?

Not necessarily — private banks compete on flexibility and bespoke structuring rather than headline rate. For some borrowers the rate is comparable to or lower than a high-street equivalent; for others it is marginally higher, with the benefit coming from how the income is assessed rather than from the cost of the debt. Comparing on rate alone, across products with different terms and structures, will not give you an accurate picture.