HSBC Raises Mainstream Mortgage Limits to £5m — Do HNW Borrowers Still Need a Private Bank?

HSBC's expansion of its high-value mortgage proposition is more significant than another small movement in mortgage pricing. It changes the amount some wealthy borrowers can potentially raise through a major mainstream lender — and moves the point at which private banking becomes necessary.

HSBC has materially increased lending limits across several higher-value residential mortgage bands, widening the options available to borrowers purchasing and refinancing expensive UK homes.

For capital-repayment mortgages secured against houses, the maximum loan available at 85% loan-to-value has increased from £2 million to £3 million, while the maximum at 75% LTV has increased from £3 million to £5 million, according to the lending changes announced on 19 August.

The lender has also increased maximum interest-only lending at 75% LTV from £2 million to £3 million. Flats remain subject to different and generally lower high-value LTV parameters.

HSBC's published High Value Mortgage Service also confirms that borrowing requirements above £5 million are not automatically excluded and can be considered through its specialist high-value route.

Why a £5m Mainstream Lending Limit Matters

Large residential mortgages have traditionally occupied an unusual part of the lending market.

A borrower may have excellent income, substantial equity and a conventional prime residential property, yet find that the size of the required loan pushes the transaction outside the standard limits of many mainstream lenders.

At that point, the conversation often moves towards private banking.

Private banks can be highly effective for HNW clients, particularly where the borrower's financial position requires a holistic assessment of income, investments, business interests and wider assets.

But private banking can also involve a broader relationship. Depending on the institution and transaction, the client may be asked to transfer deposits or investment assets, establish assets under management or move part of their wider banking relationship.

If the client's underlying mortgage requirement is actually relatively straightforward, a larger mainstream lending limit creates another route that should be considered before those wider commitments are made.

The £3m–£5m Mortgage Market Has Become More Competitive

The most commercially significant part of HSBC's change is the expansion of its 75% LTV capital-repayment limit for houses from £3 million to £5 million.

Consider a borrower purchasing a £6 million home and requiring a £4 million mortgage.

Historically, the loan size alone could substantially narrow the mainstream market even where the applicant had strong conventional earnings and a sizeable deposit.

That borrower may now have an additional major-bank option to compare against specialist and private-bank proposals, subject of course to affordability, valuation, credit assessment and HSBC's full lending criteria.

This matters because large mortgages should not be viewed solely through the headline interest rate.

The total structure can include product fees, valuation requirements, repayment flexibility, interest-only restrictions, early repayment charges, banking commitments and the opportunity cost of moving or liquidating investment assets.

Do You Still Need a Private Bank for a £3m Mortgage?

Not necessarily.

Loan size alone is becoming a less reliable indicator of whether a client needs private banking.

A borrower requiring £3 million who receives a large, stable PAYE salary, has a straightforward UK tax position and is purchasing a conventional prime residence may be entirely different from another borrower requiring the same £3 million whose wealth is held through businesses, investment portfolios and international structures.

The first borrower may fit a mainstream high-value proposition extremely well.

The second may still benefit substantially from a private bank capable of looking beyond conventional salary multiples and assessing the client's broader balance sheet.

The mortgage amount is identical. The appropriate lending market is not.

Private Banking Is Not Becoming Redundant

It would be a mistake to interpret higher mainstream lending limits as evidence that private-bank mortgages are becoming unnecessary.

Private banks solve a different set of problems.

A successful entrepreneur, for example, may deliberately retain profits within a company rather than extract a large salary. Their conventional taxable income may therefore understate their economic capacity.

Another client may receive income across several countries and currencies. A family may hold substantial investments but relatively modest earned income. An executive may receive a significant proportion of remuneration through bonuses, carried interest or equity.

A client may also want a large interest-only facility because they have a clearly identifiable future liquidity event rather than because they need to maximise monthly affordability.

Private banks can often assess these situations by considering the borrower's overall wealth and financial strategy rather than attempting to fit every case into a conventional retail mortgage model.

That flexibility remains extremely valuable.

What has changed is that loan size itself is less likely to be sufficient reason to choose private banking.

Interest-Only Borrowers Need a Separate Comparison

Large interest-only mortgages deserve particular attention because maximum LTVs and acceptable repayment strategies can differ significantly from capital-repayment lending.

HSBC's latest changes increase the amount available on interest-only at 75% LTV to £3 million under the relevant proposition, but its wider published high-value criteria demonstrate that interest-only lending is subject to its own LTV framework.

That makes the repayment strategy critical.

A HNW client may intend to repay the mortgage through investment assets, bonuses, the sale of another property, business proceeds or another identifiable source of capital.

Different lenders take very different views on those strategies.

A private bank may sometimes offer greater flexibility where the client's assets and future liquidity are substantial but do not fit a mainstream lender's prescribed repayment-plan criteria.

Should You Move Investments to Secure a Mortgage?

This is where the change becomes particularly relevant to wealth managers and their clients.

Private banks may be willing to provide highly competitive mortgage terms where the client also brings investment assets into the relationship. In the right circumstances, that can make considerable sense.

But assets under management are not economically neutral.

Moving an investment portfolio can involve management charges, investment strategy considerations, tax implications and disruption to an existing wealth-management relationship.

Likewise, liquidating investments simply to reduce the mortgage amount can have consequences that extend well beyond the mortgage rate.

Where the client's only reason for moving assets is that they believe a private bank is the sole source of the required mortgage, the wider market should now be tested carefully.

Mortgage advice and investment advice remain distinct disciplines, and any investment or tax consequences should be considered with the client's appropriately qualified advisers.

What About Mortgages Above £5m?

HSBC's published High Value Mortgage Service confirms that the £5 million level should not necessarily be viewed as an absolute ceiling.

Its current intermediary information states that larger borrowing requirements can be considered through its high-value service, subject to the lender's criteria and individual underwriting.

HSBC's published high-value LTV framework also shows how leverage reduces as loan size increases. That is typical of the large-loan market: a lender may be willing to provide a larger absolute facility but require more borrower equity as exposure increases.

Once borrowing moves materially above standard product limits, however, the value of bespoke underwriting becomes increasingly important.

Private banks, specialist banks and high-value teams within mainstream institutions can therefore all become relevant.

Property Type Still Matters

The headline £5 million figure should not be interpreted as a universal mortgage limit across every residential property.

HSBC's current high-value criteria distinguish between houses and bungalows on one hand and flats and maisonettes on the other, with lower LTV parameters applying to flats at certain loan sizes.

This is particularly relevant in prime central London, where many multimillion-pound purchases involve apartments rather than houses.

The building itself can also influence the lending outcome. Lease terms, service charges, construction, building height, cladding, property condition and marketability can all affect a lender's view independently of the borrower's financial strength.

A £4 million mortgage against a conventional family house and the same loan against a highly unusual prime apartment should therefore not be assumed to produce identical lender options.

Large Mortgage Advice Is About Structure, Not Just Rate

The larger the mortgage, the more important apparently small differences become.

A modest pricing difference on a £4 million facility can translate into a substantial annual cash cost. But choosing purely on rate can be equally expensive if the structure does not fit the client's wider finances.

A properly constructed comparison should consider far more than the headline mortgage product.

The Wealth-Manager Conversation Has Changed

HSBC's move creates an important discussion for wealth managers and discretionary investment managers.

Consider a client who wants to purchase a £5 million or £6 million property and has been told that obtaining the required mortgage will mean transferring a substantial investment portfolio to a private bank.

That private-bank proposal may still be the best solution.

But there is now a stronger reason to establish whether a mainstream high-value lender can meet the borrowing requirement before assets are moved.

This allows the mortgage decision and investment-management decision to be assessed separately rather than making one contingent upon the other without testing alternatives.

For professional advisers, that can help protect the client's existing investment strategy while still giving them access to the property financing they require.

Prime Buyers Should Establish Funding Before Negotiating

The same principle applies to estate agents and buying agents working with prime-property clients.

A wealthy buyer may appear financially straightforward because they have significant income and assets, but a £3 million or £4 million mortgage still requires detailed underwriting.

Establishing the funding structure before an offer is made can strengthen the buyer's position and reduce the risk of discovering later that the intended lender's maximum loan, property criteria or interest-only policy does not work.

In high-value transactions, certainty of execution can be as important as the headline mortgage rate.

How Willow Private Finance Can Help

Willow Private Finance works across mainstream large-loan mortgages, specialist lending and private banking, allowing HNW clients to compare different parts of the market rather than approaching the transaction with a predetermined lending route.

For borrowers requiring £2 million to £5 million or more, we can assess whether a mainstream high-value mortgage is sufficient or whether the client's circumstances justify a more bespoke private-bank structure.

That assessment can include earned and variable income, business ownership, investment assets, international earnings, existing property exposure, interest-only requirements and the client's preferred repayment strategy.

Crucially, we can also compare the non-rate elements of the transaction, including leverage, asset-transfer requirements, banking relationships, repayment flexibility and execution.

HSBC's latest change is therefore welcome not simply because another lender can provide larger mortgages. It creates more competition for HNW borrowers — and more reason to compare the entire market before assuming that a multimillion-pound mortgage requires a private bank.