Large Mortgages for High-Value Properties

This guide explains what changes when you need a mortgage of £1 million or more, why fewer lenders operate at this level, how affordability is assessed for high earners with complex income and what options exist for structuring large loans. High-value mortgage applications often require a different approach from standard lending, and the lender pool narrows significantly above certain thresholds.

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

For a free initial consultation about large mortgage options, call 01202 155992 or contact Mortgage One.

What Counts as a Large Mortgage

There is no single industry definition, but mortgages of £1 million or more are generally considered large or high-value. Many high street lenders set maximum loan amounts that cap well below this level, even where the borrower meets all affordability criteria. A lender that will happily approve a £400,000 mortgage may decline the same borrower for £1.2 million simply because the loan exceeds its internal lending cap.

Above £1 million, the lender pool becomes more specialist. Private banks, wealth management lenders and specialist intermediary-only providers become more relevant, alongside the handful of high street lenders that operate at this level. The criteria, pricing and service model at these lenders can differ materially from standard mortgage lending.

Why Lender Caps Matter

Most mainstream lenders set maximum loan amounts by product tier and loan-to-value band. For example, a lender might cap lending at £500,000 for products above 85 per cent LTV, but allow up to £2 million at 75 per cent LTV. These caps are not based on your affordability; they are internal risk limits set by the lender’s credit policy.

This means that even with a high income and strong deposit, you may find that the lender you would normally use cannot accommodate the loan size. A broker who understands which lenders operate at which thresholds can avoid wasted applications and unnecessary credit searches.

How Affordability Works for High Earners

Standard income multiples of 4 to 4.5 times salary apply at most mainstream lenders. For a mortgage of £1 million, this would require a household income of approximately £220,000 to £250,000. Some specialist and private bank lenders will stretch to 5 or even 5.5 times income for high earners, which can make a significant difference at this level.

For borrowers with complex income, the assessment can be more nuanced. Common income types that require specialist handling include:

•       Bonuses and commission. Some lenders average bonuses over two or three years; others may use the latest year or discount bonus income entirely. The difference in how bonuses are treated can add or remove hundreds of thousands from the maximum loan.

•       Self-employed income and company profits. Many lenders assess limited company directors on salary and dividends only, which can be restrictive if you retain profits in the business. Specialist lenders may assess your share of the company’s net profit instead. Mortgage One’s self-employed mortgage guide explains how self-employed income is treated by different lenders.

•       Investment income, rental income, trust distributions and foreign currency earnings. Each requires evidence and may be treated differently by different lenders. Not all lenders will accept all income types.

•       Carried interest and partnership profit share. These are common among private equity professionals and solicitors but not all lenders understand or accept them.

To discuss how your income would be assessed for a large mortgage, call 01202 155992 or contact Mortgage One.

Deposit and Loan-to-Value

At higher loan amounts, lenders generally prefer lower loan-to-value ratios. While 90 or 95 per cent LTV products are widely available for smaller mortgages, the maximum LTV for loans above £1 million is typically 75 to 85 per cent. Some private banks will consider higher LTV for established clients with substantial liquid assets, but this is assessed on a case-by-case basis.

A larger deposit not only opens up more lenders but can also unlock better pricing. The rate differential between 75 and 85 per cent LTV can be more pronounced on large loans, so the deposit amount can have a material impact on the total cost of the mortgage.

Interest-Only on Large Mortgages

Interest-only lending is more widely available on large mortgages than on standard-sized loans. Many lenders that restrict interest-only lending for smaller mortgages will consider it for borrowers with high incomes and substantial assets. The repayment vehicle, the plan for repaying the capital at the end of the term, typically involves the sale of the property, investment portfolios, other property assets or pension funds. Mortgage One’s interest-only mortgages guide explains how repayment vehicles are assessed.

Some borrowers choose a part-and-part structure, where a portion of the mortgage is on interest-only and the remainder on repayment. This can balance lower monthly costs with gradual capital reduction.

Private Banks and Specialist Lenders

For mortgages above £1 million, private banks and specialist wealth management lenders become increasingly relevant. These lenders typically offer manual underwriting, meaning each application is assessed individually by a senior underwriter rather than being processed through automated affordability models. This can allow greater flexibility on income assessment, property type and loan structure.

Private bank lending may also consider your overall wealth position, including investment portfolios, pension assets and other property holdings, alongside your income. Some private banks require you to hold a minimum level of investable assets with the bank as a condition of the mortgage, which effectively creates a broader banking relationship.

Stamp Duty on High-Value Properties

Stamp duty land tax on high-value properties in England and Northern Ireland is charged at progressively higher rates. The highest SDLT band is 12 per cent on the portion of the price above £1.5 million for residential purchases, with an additional 5 per cent surcharge if the property is an additional home. On a £2 million purchase, the total SDLT can exceed £200,000 before surcharges. Mortgage One’s stamp duty calculator can help you estimate the amount payable.

How Mortgage One Can Help

Large mortgages require a broker who understands which lenders operate at high loan values, how they assess complex income and what flexibility is available on interest-only, LTV and term. As a whole of market mortgage broker, Mortgage One can identify lenders across the high street, private bank and specialist intermediary-only markets and present your application in the format each lender requires.

This includes structuring the income evidence to maximise the borrowing available, advising on the deposit strategy relative to lender caps and LTV pricing, and coordinating with the lender’s valuation process for high-value properties. Mortgage One’s remortgaging guide explains how remortgaging works if you are looking to restructure an existing large mortgage.

For expert guidance on large mortgages, call 01202 155992 or contact Mortgage One.

The information provided in this article is for general guidance only and does not constitute personal or regulated financial advice. If you’d like to understand what these moves could mean for you, speak to Mortgage One. We can explain your options and timings based on your specific circumstances.

Some Buy to Let mortgages are not regulated by the Financial Conduct Authority.

FAQs

1. What counts as a large mortgage?

There is no single definition, but mortgages of £1 million or more are generally considered large. Many high street lenders set maximum loan amounts that cap below this level, even where the borrower meets affordability criteria.

2. Why is it harder to get a large mortgage?

The application process is the same, but fewer lenders operate at high loan values. Many mainstream lenders set internal caps on the maximum they will lend, regardless of affordability. A broker can identify which lenders accommodate the loan size you need.

3. Can I get a large mortgage with complex income?

Yes, but the lender choice matters. Standard lenders may assess only salary and dividends, while specialist and private bank lenders may consider bonuses, company profits, investment income and other sources. How income is assessed can significantly affect the maximum loan.

4. What deposit do I need for a large mortgage?

The maximum LTV for loans above £1 million is typically 75 to 85 per cent. A larger deposit opens up more lenders and can unlock better pricing. Some private banks may consider higher LTV for clients with substantial liquid assets.

5. Is interest-only available on large mortgages?

Yes, and it is more widely available at higher loan amounts than for standard mortgages. The lender will require a credible repayment vehicle, which could include the sale of the property, investment portfolios or pension assets.

6. What is the difference between a private bank and a high street lender?

Private banks offer manual underwriting, individual assessment and greater flexibility on income, property type and loan structure. Some require you to hold investable assets with the bank. High street lenders use automated affordability models and are less flexible but may offer lower rates on straightforward applications.

7. How much stamp duty will I pay on a high-value property?

SDLT is charged at progressively higher rates, with the top band at 12 per cent on the portion above £1.5 million. An additional 5 per cent surcharge applies if the property is an additional home. The total can exceed £200,000 on a £2 million purchase.

8. Do I need a specialist broker for a large mortgage?

It is not mandatory, but it is advisable. A broker who understands the private bank and specialist lender market can identify options that are not available on the high street and present your application in the way each lender requires.