Large and million-pound mortgages
A large mortgage is a loan above the limits most standard products allow, often a million pounds or more. This guide explains how lenders assess big loans and how to prepare an application.
Reviewed by David Sampson, Founder & Director · Created 20 October 2026 · Last reviewed 20 October 2026
TL;DR
- •Large mortgages are usually underwritten manually rather than scored online.
- •Lenders look at total income, assets, deposit and the property itself.
- •Maximum loan sizes and loan-to-value limits vary widely by lender.
- •Interest-only and part-and-part structures are common for big loans.
What is a large mortgage?
A large mortgage is a home loan that sits above the size most standard products are designed for. There is no fixed threshold, but lenders often move cases to a separate large loan or high value team once the loan or property value passes a level they set, and a million pound mortgage is commonly treated this way.
Above that point, lenders usually underwrite the case by hand. An underwriter or credit committee reviews the borrower's income, assets and plans, and the lender may ask for more evidence than it would for a smaller loan. High value mortgages are also more likely to need a specialist valuation.
Large mortgage UK options come from private banks, specialist lenders and the large loan ranges of high street lenders. Each sets its own maximum loan, loan-to-value limits and income rules, so the amount one lender offers can differ sharply from another.
How much do you need to earn for a million-pound mortgage?
How much you need to earn for a million-pound mortgage depends on the lender, the structure and your other commitments. Many lenders still start from an income multiple, but large loan teams often look past it when a borrower has significant assets, reliable bonuses or a clear plan to repay the capital.
For a repayment mortgage, the lender needs to be satisfied that monthly payments are affordable after tax, living costs and existing debts, including at a higher stress rate. For interest-only, it also needs a credible repayment strategy for the capital at the end of the term.
A 2 million mortgage or a mortgage over 1 million follows the same principles, with more scrutiny as the loan grows. Joint income, rental income from other property and investment returns can all count, depending on the lender. The affordability calculator gives a first estimate using your own income and outgoings.
Deposits and loan-to-value on large loans
Lenders usually ask for a bigger deposit as the loan size grows. Maximum loan-to-value limits often step down in bands, so a borrower who could borrow a high share of the value on a smaller loan may need to put in more equity for a very large one. Each lender sets its own bands.
The deposit can come from savings, the sale of another property, investments or a gift, but lenders will check where the money has come from. Source of funds checks are thorough on large loans, particularly where money has moved between countries or through companies.
Some lenders accept other assets as extra security instead of a larger cash deposit. This might be a charge over investments or a second property, and it can reduce the cash a borrower needs to put in, though it adds legal work and cost. The large mortgage calculator is planned to show how deposit, loan size and income fit together.
How to get a large mortgage
Getting a large mortgage starts with a clear summary of income, assets, the property and how the loan will be repaid. Because each case is reviewed by hand, the way it is presented matters. Most borrowers use a broker who arranges large loans, since many lenders in this market work mainly through intermediaries.
Getting a large mortgage UK lenders will approve also depends on timing. Large cases can take longer to underwrite and value, so starting early, before an offer is accepted on a property, gives time to agree terms. Lenders may issue indicative terms first and a formal offer later.
Typical documents include recent accounts or payslips, tax returns, bank and investment statements, proof of deposit and identification. Borrowers with trusts, companies or overseas assets should expect extra legal checks. How the process works with a specialist intermediary is explained in the guide to high net worth mortgage brokers.
Large mortgage lenders and providers
Large mortgage lenders fall into three broad groups: private banks, specialist lenders and high street banks with large loan or premier ranges. Private banks often lend on the strength of a wider relationship, specialists focus on flexible underwriting, and high street lenders may offer competitive pricing within stricter criteria.
Large mortgage providers differ on maximum loan size, how they treat variable income, whether they accept interest-only and what they require from borrowers. Some ask for assets to be held with them, while others lend on the property and income alone. Comparing the conditions attached to each offer is as important as comparing price.
Large mortgage London cases are common because property values are higher, but lenders also lend on high-value homes across the rest of the UK. Location affects the valuation and, at some lenders, the maximum loan-to-value they will accept.
Costs on large mortgages
Large mortgages carry the same types of cost as smaller loans, but some are higher in cash terms. Arrangement fees may be charged as a percentage of the loan, valuations on high-value homes cost more, and legal work can be more involved when there are trusts, companies or overseas elements.
Stamp duty on a higher-value purchase can be a large sum and must usually be paid from the borrower's own funds. Early repayment charges on a big loan can also be significant in cash terms, so the length of any fixed or discounted period deserves careful thought.
Large mortgages sit within the wider high net worth market, which is covered in the guide to high net worth mortgages.
Frequently asked questions
What is the largest mortgage you can get in the UK?
There is no single limit. Each lender sets its own maximum, and private banks and specialist lenders can lend well above standard product limits for strong cases.
What counts as a large mortgage?
Most lenders treat a loan as large once it passes a size they set for their standard range, often around a million pounds. Above that, cases are usually underwritten by hand.
Do large mortgages need a bigger deposit?
Usually, yes. Maximum loan-to-value limits tend to fall as the loan size rises, though some lenders accept other assets as extra security.
Can I get an interest-only million-pound mortgage?
Yes, interest-only is common on large loans if the lender accepts the repayment strategy, such as investments or the sale of property.
Is a large mortgage harder to get?
It is assessed more closely, with more documents and manual underwriting. Borrowers with clear evidence of income, assets and a repayment plan are well placed.
Do I need a specialist lender for a large mortgage?
Not always. Some high street lenders have large loan ranges, but private banks and specialist lenders often offer more flexibility on complex income.
How long does a large mortgage take to arrange?
It depends on the case. Manual underwriting and specialist valuations can add time, so it helps to start before an offer is accepted on a property.
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Important: Your home may be repossessed if you do not keep up repayments on your mortgage. Information on this page is for general guidance only and does not constitute financial advice.Always verify details directly and seek independent advice before making financial decisions.