The single most common question we get from clients approaching the £1 million mark is some variant of: “what does a £1 million mortgage actually cost a month?” The honest answer depends on the rate, the term, and whether you go interest-only or capital repayment. At a current rate of 4.85% over 25 years, a £1 million mortgage costs around £4,040 a month interest-only or £5,780 a month on capital repayment. But the more important question is what changes at £1 million. The lender list, the underwriting approach, and the products available all shift once you cross this threshold.
This guide is what we have found over the last few years actually working for clients borrowing £1 million and above in the UK. It covers the real cost figures, the deposit and income requirements, why £1 million is the switchpoint where the FCA high net worth rules opens up, which lenders engage at this level, and how to put an application together so it lands cleanly first time.
Fox Davidson arranges large and high-net-worth mortgages from £1m, including £1m to £50m+ across private banks, building societies and specialist HNW desks. Most weeks we have at least three £1m+ cases on the desk.
Cost
What does a £1 million mortgage actually cost in 2026?
The monthly cost of a £1 million mortgage moves with three variables: the headline rate, the term, and whether you choose interest-only or capital repayment. Here are the realistic 2026 numbers.
Capital repayment (25 yr)
Monthly servicing cost on £1m at four representative rates. Source: Fox Davidson.
The capital repayment figure is roughly £1,700 to £1,800 per month higher than interest-only because you are paying down the principal rather than just servicing the interest. Over a 25-year term that gap totals around £540,000, which is the loan being paid off.
What we have found is that most £1m+ borrowers we place go interest-only rather than capital repayment, for two reasons. First, the FCA high net worth rules framework opens up interest-only structures that mainstream affordability rules do not allow, and the lower monthly cost helps the underwriting maths. Second, the typical £1m+ borrower has a clear capital repayment plan: property sale, investment liquidation, RSU vesting, business exit, or inheritance crystallisation. Interest-only suits clients whose income services interest comfortably and whose assets repay capital at a clear future event.
Qualification
Who qualifies for a £1 million mortgage in the UK?
Three things drive whether a £1 million mortgage is accessible: income, deposit, and assets. The exact bar varies by lender and structure but the rough thresholds we work to are these.
Income. On a standard income-multiple basis, mainstream lenders apply 4.5x to 5x annual income for £1m mortgages. That implies £200,000 to £225,000 annual income for a £1m loan at 4.5x to 5x respectively. Specialist HNW desks at private banks and challenger banks push to 5.5x or 6x for borrowers in the right professions or with the right wealth profile, which lowers the income requirement to £165,000 to £180,000 for a £1m loan. Above £100,000 base income with strong supporting evidence (bonus, dividends, equity vesting, asset base), the income multiple regularly moves higher.
Deposit. Most £1m+ mortgages we place sit at 75% to 80% LTV, requiring a £200,000 to £250,000 deposit on a £1m loan. Specialist HNW desks go to 85% LTV for the right borrower profile, occasionally 90% LTV at private banks for clients with significant other assets under management. Below 60% LTV, pricing improves materially.
Assets. For asset-rich, income-light borrowers, the FCA high net worth rules allows lenders to underwrite based on net asset value rather than income alone. Net assets above £3 million (the FCA HNW threshold) opens this route. Often we find that an applicant declined by their high-street relationship for “lack of income” gets a sensible £1m+ offer once a specialist lender uses the asset-based route.
Why £1m matters
Why £1 million is the switchpoint where lender behaviour changes
Below £1 million, mainstream high-street lenders compete aggressively on rate. Above £1 million, the conversation shifts. What we have found is that £1m is the threshold where three things happen at once.
First, the FCA high net worth rules framework becomes practically available. The Financial Conduct Authority’s the FCA high net worth rules regulatory framework allows specialist lenders to make mortgages on more flexible terms (interest-only structures, longer terms past retirement, asset-based affordability) for high-net-worth borrowers, defined as having either £300,000+ annual net income or £3 million+ net assets. Below £1m, mainstream affordability rules apply. Above £1m, the FCA high net worth rules opens the door to specialist HNW lending products.
Second, the lender list narrows but deepens. Most mainstream high-street lenders cap residential mortgages at £750,000 to £1m on standard products. Above £1m, the active lender list contains specialist HNW desks at private banks (Coutts, Weatherbys, Arbuthnot Latham, Investec, Hampden & Co, Lombard Odier), building societies with HNW underwriting teams (Skipton, Newcastle, Cumberland, Saffron, Cambridge), and challenger banks (Aldermore, Paragon, OakNorth). The pricing competition shifts from rate alone to a combination of rate, structure flexibility, and lender appetite for the specific borrower profile.
Third, the income proofing route changes. Mainstream lenders use SA302s, payslips, and standard bonus averaging. Specialist HNW desks accept dividend income, share of net profit, retained earnings, carried interest, equity vesting (RSUs), foreign currency income, and trust distributions. The income proofing complexity is often the reason a borrower who could not get £750k from their high-street bank can get £2m from a specialist lender on the same income.
Lender access
Which UK lenders offer £1 million mortgages?
The active lender market for £1m+ mortgages in the UK splits into four bands.
The four lender bands at £1m+. Source: Fox Davidson.
What we have found is that the right lender for a £1m+ mortgage depends almost entirely on the borrower’s specific profile. A senior partner in a Magic Circle law firm fits a different lender list to a tech founder with significant equity vesting. A retired professional with £5m of liquid assets fits a different list again. The broker conversation always starts with: what does the lender need to be convinced about, and which lender’s criteria fits without compromise?
Deposit and LTV
What deposit and LTV apply to £1 million mortgages?
Most £1m+ residential mortgages we place sit at 75% to 80% LTV. The realistic deposit bands by lender type:
| Lender type | Typical LTV | Deposit on £1m loan | Notes |
|---|---|---|---|
| Mainstream & challenger (£1m to £1.5m) | 75% (occasionally 80%) | £250k to £333k | Pricing keenest where you fit; criteria rigid |
| Building society HNW desks | 80% (occasionally 85%) | £176k to £250k | Most common route. No AUM expected |
| Private banks | 75-90% | £100k to £333k | 90% LTV available with significant AUM commitment |
| Specialist HNW lenders | 75-90% (cross-charge) | £100k to £250k | Higher LTV often via additional security |
Often we find that a client’s first conversation with a high-street lender returns a quote requiring 30%+ deposit for a £1m mortgage, which feels prohibitive. The same borrower’s second conversation, with a building society HNW desk via a specialist broker, returns 20% deposit on the same property. Same client, same income, same week. The lender route was the variable.
Income proofing
How is income assessed for £1 million mortgages?
Below £1 million, lenders use standard income-multiple affordability calculations. Above £1 million, three different income proofing routes are commonly used in addition to or instead of the standard approach.
Salary plus dividends for limited company directors. Standard approach but with HNW desks accepting longer averaging periods (3 years rather than 2) and willingness to use the latest year’s profit if growing.
Salary plus share of net profit for directors who reinvest rather than draw dividends. A specialist lender group treats the director’s share of company profit as personal income for affordability purposes. This typically reads materially higher than salary plus dividends on a director who is reinvesting in growth.
Asset-based assessment under the FCA high net worth definition. Where the borrower has £3m+ net assets, specialist lenders underwrite on the asset base rather than monthly income. Monthly servicing comes from investment portfolio income or capital event repayment. Used for retired professionals, pre-IPO founders, and downsizers.
Multi-source income aggregation for borrowers with several income types: base salary plus bonus plus dividends plus rental income plus investment yield. Specialist HNW desks combine these into a single assessable income figure, where mainstream lenders typically count only the largest two sources.
The income proofing switch that doubled a client’s loan
One of the best things we did with a recent client was switching the income proofing route from salary plus dividends to share of net profit. Same client, same first year of company accounts. Salary plus dividends gave usable income of £180,000. Share of net profit gave £320,000. The maximum borrowing went from £810,000 to £1,440,000 on the same 4.5x multiple.
The £1.2m mortgage he needed was suddenly comfortably affordable. The route, not the underlying income, was the variable.
Worked example
£1.2m purchase, £960k mortgage, complex income
A representative case from earlier this year, anonymised. Client earned £125,000 base salary as a director of a growing consultancy, plus £80,000 of dividends in the latest year and £140,000 of retained company profit reinvested in business growth. Looking to buy a £1.2m London home with a £240,000 deposit (20%) and a £960,000 mortgage.
The mainstream lender he had approached directly used salary plus 50% of dividends, giving usable income of £165,000. At 4.75x income, the maximum loan was £784,000, well short of the £960,000 he needed. He had been told he needed either a larger deposit or a smaller property.
What we did was identify a specialist HNW lender that uses share of net profit. The director’s full share of company net profit before dividend distribution is around £220,000 in the relevant year. Combined with the £125,000 base salary, the assessable income reads as £345,000. At 5x income (the multiple this lender uses for HNW directors), the maximum loan is £1,725,000, comfortably above the £960,000 needed.
The case completed at 80% LTV on a 5-year fixed at 4.85% interest-only, with a £4,884 monthly servicing cost. Total cost over the 5-year fixed period: roughly £293,000 in interest payments. Capital repayment plan: business exit in year 5-7, projected to crystallise £2m+ of equity for the director.
Common pitfalls
Common reasons £1 million mortgage applications fall over
Three patterns account for most of the declined £1m+ applications we see clients arrive with.
Wrong lender route. The high-street lender’s affordability calculation does not stretch to the loan needed, the borrower assumes no lender will, and the case is parked. In our experience, the same case usually places at a specialist HNW desk or a building society HNW team where the affordability calculation is fundamentally different.
Income proofing mismatch. The borrower applies on salary plus dividends when share of net profit would unlock more income. Or applies on PAYE when bonus averaging over 3 years would help. Or applies without an accountant’s projection letter that would have read more income for a growing business.
Property issue at valuation. The lender’s valuer flags a structural concern, an EWS1 issue, a leasehold concern, or a non-standard construction note. £1m+ properties are often older, larger, or unusual stock where these issues come up. Specialist lenders are sometimes more flexible than mainstream lenders on property concerns at this loan level, particularly for HNW desks who underwrite on the borrower’s overall wealth profile.
Application process
How to apply for a £1 million mortgage
The process we run for £1m+ clients is consistent. Initial 20-minute call to understand the income profile, target property, deposit, asset base, and credit position. Soft modelling against the four to six lenders most likely to engage at sensible terms. Written summary showing the maximum loan and indicative rate from each route. Documentation request to the client and (for directors) to the accountant. Soft application to the chosen lender for verbal indication. Hard application once the verbal returns positive. Through to offer.
Most £1m+ cases we place complete within seven to ten weeks from initial call to legal completion. Private bank mortgages can take slightly longer because of the AUM relationship and KYC. Specialist HNW desk mortgages often complete faster, in five to seven weeks, because the lender is geared up for HNW borrower documentation.
Documentation we typically need: 3 years of personal tax returns (SA302s plus tax year overview), latest 2 years of company accounts for directors, 6 months of personal bank statements, 6 months of business bank statements, deposit source evidence, accountant’s letter for the current trading year, statement of net worth (for HNW route) including investment portfolio and other property values, and standard KYC. Putting this together typically takes 1 to 2 weeks if the accountant is responsive.
FAQ
Frequently asked questions
What is the monthly cost of a £1 million mortgage?
At a 2026 rate of 4.85%, a £1 million mortgage costs around £4,040 per month interest-only or £5,780 per month capital repayment over 25 years. The figure varies with the rate: at 4.50% the interest-only payment is £3,750, at 5.25% it is £4,375. Specialist HNW lenders often offer slightly keener rates than mainstream banks for the right borrower profile.
What income do you need for a £1 million mortgage in the UK?
Mainstream lenders apply 4.5x to 5x income, implying £200,000 to £225,000 annual income for a £1m loan. Specialist HNW desks push to 5.5x or 6x for the right borrower, lowering the income requirement to £165,000 to £180,000. For asset-rich, income-light borrowers, the FCA high net worth rules allows asset-based assessment instead of income.
What deposit do you need for a £1 million mortgage?
Most £1m+ residential mortgages sit at 75% to 80% LTV, requiring a £200,000 to £250,000 deposit on a £1m loan. Specialist HNW desks go to 85% LTV for strong borrower profiles. Private banks offer 90% LTV (10% deposit) for clients with significant assets under management with the bank.
Which UK lenders offer £1 million mortgages?
The active market splits into four bands: mainstream high-street and challenger lenders for £1m to £1.5m on standard products, building societies with HNW desks (Skipton, Newcastle, Cumberland, Saffron, Cambridge and others) for £1m to £15m+, private banks (Coutts, Weatherbys, Arbuthnot Latham, Investec, Hampden & Co, Lombard Odier) for £3m to £30m+, and specialist underwriters for the most complex cases.
Can you get a £1 million interest-only mortgage in the UK?
Yes. Interest-only is more common at £1m+ than below because the FCA high net worth rules framework allows it for HNW borrowers. The lender requires a clear capital repayment plan: property sale, investment liquidation, business exit, RSU vesting, or inheritance distribution. Most £1m+ mortgages placed in 2026 are interest-only rather than capital repayment.
What rates apply to £1 million mortgages in 2026?
Standard 5-year fixed rates at 75% LTV currently price in the 4.5% to 5.3% range across mainstream and specialist lenders. Private bank pricing varies depending on AUM relationship and security structure. The rate environment in 2026 reflects the Bank of England base rate at 3.75% and softening 5-year swap rates.
How long does a £1 million mortgage application take?
Most £1m+ cases complete within seven to ten weeks from initial call to legal completion. Specialist HNW desks often complete faster (five to seven weeks). Private banks can take longer due to KYC and AUM relationship setup. Auction or time-pressured purchases sometimes use bridging finance to meet the completion window and refinance to the £1m+ mortgage afterwards.
Is £1 million the threshold for HNW mortgages?
£1m is the practical threshold where the FCA high net worth rules and specialist HNW lender desks become available. The FCA’s formal HNW definition is based on income (£300,000+ annual net) or net assets (£3m+), not loan size. But in practice, the £1m loan size is where the HNW lender list opens up and the structuring conversation shifts.
Final thoughts
Final thoughts
£1 million mortgages in the UK in 2026 are accessible to more borrowers than the high-street comparison sites suggest. The lender list is broad once you know where to look, the structures available (interest-only, asset-based, share of net profit) are more flexible than mainstream affordability rules allow, and the income requirement can be materially lower if the right proofing route is used.
If you are weighing up a £1m+ purchase or refinance and want to know what is realistic on your specific profile, send us your income, your deposit and your target property in a 20-minute call. We will model the lender options and the affordability maths in writing within 24 hours. Most of the work that decides the outcome happens before the application is submitted, not after.
£1 million mortgage in mind? Let’s model it.
Send us your income, deposit and target property in a 20-minute call. We will model the lender options and affordability maths in writing within 24 hours.