Last reviewed: June 2026
TL;DR- A £1 million mortgage at 4.5 times income requires a gross income of around £222,000 - placing this firmly in specialist lending territory.
- Private banks, specialist high-value lenders and some mainstream lenders' specialist teams handle million-pound-plus mortgage applications.
- SDLT on a £1.5 million residential purchase in England is approximately £91,250 at standard rates, making the total purchase cost substantially higher than the purchase price.
- Interest only structures are more accessible at this loan size through private banking than through standard retail mortgage channels.
Income Requirements for a Million-Pound Mortgage
A mortgage of £1 million at the standard 4.5 times income multiple requires an individual or combined income of approximately £222,000. At 4 times income, the required income rises to £250,000. These levels place million-pound mortgage applicants firmly in the high-net-worth segment of the market, where specialist lenders, private banks and specialist teams within mainstream lenders are the primary route.
In practice, many borrowers at this loan size benefit from larger deposits that reduce the loan amount, or from private banking relationships where assets under management contribute to the overall credit assessment rather than income alone. A borrower with a £500,000 investment portfolio and a £300,000 income has a different credit profile from one with the same income and no assets.
Stamp Duty at High Purchase Prices
SDLT on high-value property purchases in England is significant. On a £1.5 million property at standard residential rates, SDLT is approximately £91,250. On a £3 million property, approximately £273,750. If the buyer is purchasing an additional property (not their primary residence), the additional dwelling surcharge adds further. Non-UK resident buyers add the non-resident surcharge. For properties held in a company structure, the Annual Tax on Enveloped Dwellings (ATED) and 15% flat rate SDLT may apply. HMRC's SDLT calculator and specialist tax advice are essential before completing on a high-value property.
Interest Only at Million-Pound Loan Size
Interest only structures are more accessible at million-pound loan sizes through private banking than through standard retail mortgage channels. Private banks regularly structure large residential mortgages on an interest only basis where the LTV is low and the borrower maintains a significant investment portfolio or other assets that provide confidence of eventual repayment. The repayment vehicle for a private banking interest only mortgage is typically an investment portfolio managed by the same institution.
AIP and Timeline
Agreement in principle (AIP) at million-pound loan sizes is not a quick automated process. Specialist lenders and private banks conduct a manual initial assessment before issuing an AIP, which may take several days. Full application processing typically takes 4-8 weeks. Buyers making offers on high-value properties should ensure they have an AIP from a credible lender before offering, and should allow adequate time in the purchase timeline for the mortgage to complete.
Frequently Asked Questions
Which lenders offer million-pound mortgages in the UK?
Million-pound residential mortgages are offered by: private banking arms of the major clearing banks (Coutts, Barclays Private, HSBC Private); specialist private banks (C. Hoare and Co., Arbuthnot Latham, Weatherbys); specialist high-value mortgage lenders; and the specialist teams of some mainstream banks. A whole-of-market specialist broker with prime residential experience is the most effective route to identifying current lender availability and rates.
Is a million-pound mortgage harder to get than a standard mortgage?
Not necessarily harder - it is different. The underwriting is more thorough, the income assessment more detailed and the process more manual. Borrowers with strong, verifiable income and a clean financial history who can provide comprehensive documentation are well-placed. The challenge tends to be documentation complexity and timeline rather than fundamental eligibility.
Can I get a million-pound BTL mortgage?
Yes. Buy-to-let mortgages at million-pound-plus loan sizes are available from specialist BTL lenders and some private banks for qualifying properties with sufficient rental income. The rental coverage assessment applies in the same way as standard BTL - rental income must typically cover 125-145% of the mortgage payment at a stressed rate. At very high loan sizes, the pool of BTL lenders narrows further and specialist advice is essential.
What happens to SDLT if I am a first time buyer purchasing a £1 million property?
First time buyer SDLT relief only applies to properties purchased for up to £500,000. A first time buyer purchasing a property for £1 million receives no first time buyer relief - standard SDLT rates apply to the full purchase price. The government's first time buyer relief is specifically targeted at the lower end of the market where affordability challenges are most acute.
