How Much Does A £5 Million Mortgage Cost Per Month?
A £5 million repayment mortgage would cost approximately £29,230 per month over 25 years at an illustrative interest rate of 5%. A £10 million mortgage on the same terms would cost approximately £58,459 per month.
For interest-only borrowing, the monthly payments would be lower, although the original loan balance would still need to be repaid.
Mortgages of this size often require a more individual approach to lending, particularly where customers have complex income, substantial assets or specific repayment requirements.
Below, we compare the cost of £5 million to £10 million mortgages, including monthly repayments, deposits, income requirements and private banking options.
How Much Are the Monthly Repayments on a £5 Million to £10 Million Mortgage?
The table below compares estimated monthly repayments at different interest rates.
| Mortgage Amount | 4% Interest | 5% Interest | 6% Interest |
|---|---|---|---|
| £5 million | £26,392 | £29,230 | £32,215 |
| £7.5 million | £39,588 | £43,844 | £48,323 |
| £10 million | £52,784 | £58,459 | £64,430 |
Figures assume a 25-year capital repayment mortgage at a constant interest rate throughout the term. Rates are illustrative, not actual mortgage offers. Repayments are rounded and exclude fees.
The mortgage term also affects monthly repayments.
For example, at an illustrative 5% interest rate over 30 years:
- A £5 million mortgage would cost approximately £26,841 per month.
- A £10 million mortgage would cost approximately £53,682 per month.
Longer mortgage terms usually reduce monthly repayments but increase the total interest paid over the life of the loan.
At this level of borrowing, not all lenders offer the same mortgage terms or repayment structures. Some may offer shorter terms or require a different repayment arrangement, depending on the customer’s circumstances.
You can use our mortgage calculator to estimate repayments using different interest rates and terms.
Need Help Understanding The Cost Of A £5 Million Mortgage?
£5 million mortgage will usually require a more detailed approach than a standard mortgage application. Lenders may want to understand your income, assets, liabilities, property plans, repayment strategy and overall financial position.
This can be a key consideration where income includes bonuses, commission, dividends, retained profits, foreign currency income, investment income, carried interest, trust income or self-employed earnings.
At Kerr & Watson, we can assess your circumstances, review the likely lender options and help you understand what may be achievable before you apply.
How Much Does a £5 Million to £10 Million Interest-Only Mortgage Cost?
An interest-only mortgage can reduce monthly payments because you pay the interest without reducing the outstanding capital balance.
At an illustrative interest rate of 5%, the monthly payments would be:
| Mortgage Amount | Monthly Interest-Only Payment |
|---|---|
| £5 million | £20,833 |
| £7.5 million | £31,250 |
| £10 million | £41,667 |
Figures are illustrative and exclude fees.
For a £5 million mortgage, this represents a monthly payment of approximately £20,833, compared with £29,230 on a 25-year repayment mortgage at the same rate.
However, the full £5 million would remain outstanding at the end of the interest-only term.
Lenders will require a suitable repayment strategy. Depending on their criteria, this might involve investments, other property assets or the anticipated proceeds from a future asset sale.
For substantial interest-only borrowing, lenders may examine the proposed repayment arrangements and the liquidity of the customer’s assets in considerable detail.
Interest-only mortgages are not suitable for everyone, and approval depends on the lender’s assessment of affordability and the proposed repayment strategy.
How Much Income Do You Need for a £5 Million to £10 Million Mortgage?
The income required depends on the lender, repayment type, existing financial commitments and the customer’s overall financial position.
For illustration, the table below shows the household income corresponding to different income multiples.
| Mortgage Amount | 4.5× Income | 5× Income |
|---|---|---|
| £5 million | £1,111,111 | £1,000,000 |
| £7.5 million | £1,666,667 | £1,500,000 |
| £10 million | £2,222,222 | £2,000,000 |
These are mathematical illustrations rather than lender eligibility criteria. Income multiples of this size are not necessarily available for these loan amounts.
Mortgages of £5 million or more may be assessed through bespoke underwriting rather than standard income multiples alone.
Depending on the lender, consideration may be given to regular earnings, investment income, business ownership, existing assets and the proposed repayment structure.
However, substantial assets do not automatically mean a lender will approve a large mortgage. The lender must still be satisfied that the borrowing is appropriate and meets its requirements.
What if your income is complex?
Customers requiring larger mortgages may receive income from several sources, including:
- Salary, bonuses and commission
- Dividends and company profits
- Self-employed income
- Investment and rental income
- Overseas earnings
- Trust distributions
- Carried interest or share-based remuneration
Not every lender accepts these income types, and the amount considered can vary.
For example, some lenders may assess a company director’s share of business profits, while others focus on salary and dividends. Certain lenders may also consider investment income or other eligible recurring earnings.
At Kerr & Watson, we review how your income is structured before identifying lenders whose criteria may be suitable.
How Much Deposit Do You Need for a £5 Million or £10 Million Mortgage?
The deposit required depends on the property’s value and the maximum loan-to-value (LTV) the lender is prepared to consider.
For larger mortgages, lenders may restrict their maximum LTV, particularly where the property or the customer’s financial circumstances are more complex.
The table below shows illustrative deposit requirements at 60% and 75% LTV.
| Mortgage Amount | LTV | Property Value | Deposit |
|---|---|---|---|
| £5 million | 75% | £6,666,667 | £1,666,667 |
| £5 million | 60% | £8,333,333 | £3,333,333 |
| £10 million | 75% | £13,333,333 | £3,333,333 |
| £10 million | 60% | £16,666,667 | £6,666,667 |
Figures are approximate mathematical examples, not confirmation that lending is available at these LTV levels.
For example, someone borrowing £5 million against a property valued at £10 million would have a 50% LTV.
A lower LTV may provide access to a wider range of lending options or more competitive terms, but this varies by lender.
Some private banks may also consider additional eligible assets or security when assessing a mortgage application. These arrangements are more specialised and may involve additional conditions or risks.
Which Lenders Offer £5 Million to £10 Million Mortgages?
Mortgages of this size are more specialist than standard residential borrowing.
Depending on the loan amount and circumstances, options may be available through certain mainstream banks, specialist lenders and private banks.
However, individual lenders have different maximum loan sizes, affordability requirements, property restrictions and underwriting approaches.
Some banks may consider larger loans for customers with straightforward income and strong affordability, while others focus on applicants with substantial assets or more complex financial arrangements.
Lender choice can also depend on whether the property will be your main residence, the intended repayment method and where your income and assets are held.
Find out Your Options
Should You Use a Private Bank for a £5 Million or £10 Million Mortgage?
Private banks can be an option for customers requiring substantial borrowing, particularly where conventional lending criteria do not fully reflect their financial circumstances.
They may consider applications involving:
- Significant investment portfolios or other assets
- Complex or international income
- Business ownership
- Bespoke interest-only arrangements
- High-value residential property
- Unusual repayment requirements
Some private banks assess applications individually and may offer different loan structures or pricing arrangements.
However, private banks are not automatically cheaper or more flexible than other lenders.
Certain providers require customers to maintain a minimum level of assets with the bank, establish a wider banking relationship or satisfy other wealth requirements.
These conditions should be considered alongside the mortgage interest rate, fees and repayment terms.
What Affects the Cost of a £5 Million to £10 Million Mortgage?
The main factors influencing mortgage costs include:
- Interest rate: Even a small difference in interest rate can have a substantial effect on the cost of larger mortgages.
- Loan-to-value: The size of the mortgage relative to the property value can affect lender availability and pricing.
- Mortgage term: A longer term generally lowers monthly repayments but increases total interest.
- Repayment type: Interest-only and capital repayment mortgages have different monthly costs and repayment obligations.
- Income and financial circumstances: The lender will assess affordability, existing commitments and the overall suitability of the borrowing.
- Product conditions: Fixed, tracker and variable-rate arrangements can differ in flexibility, early repayment charges and future repayment costs.
When comparing large mortgage options, it is important to consider the total borrowing cost and contractual conditions, not simply the initial interest rate.
What Additional Costs Are Involved?
Alongside your monthly mortgage payments, you may need to budget for lender arrangement fees, valuations, legal costs and mortgage advice fees.
Some lenders charge fixed arrangement fees, while others use a percentage of the mortgage amount.
For example, an arrangement fee of 1% would equal £50,000 on a £5 million mortgage or £100,000 on a £10 million mortgage.
These are illustrative calculations, not standard fees for mortgages of this size.
Valuation and legal costs will depend on the property, lender requirements and complexity of the transaction.
If you are purchasing a property, you may also need to pay Stamp Duty Land Tax in England, with the amount depending on the purchase price and your circumstances.
At Kerr & Watson, our standard mortgage advice and application fee is £595, usually split into £150 on application and £445 on mortgage offer. More complex cases may attract a higher fee of up to £1,995, while some cases may have no broker fee. We explain and agree any applicable charges before proceeding.
Frequently Asked Questions About £5 Million to £10 Million Mortgages
How much does a £5 million mortgage cost per month?
A £5 million repayment mortgage at an illustrative 5% interest rate over 25 years would cost approximately £29,230 per month. An interest-only mortgage at the same rate would cost approximately £20,833 per month, with the full capital balance remaining outstanding.
How much does a £10 million mortgage cost per month?
A £10 million repayment mortgage at an illustrative 5% interest rate over 25 years would cost approximately £58,459 per month. Over 30 years, the monthly repayment would be approximately £53,682.
Can you get a £5 million interest-only mortgage?
Potentially, yes. Certain lenders may consider interest-only mortgages of this size, subject to affordability, loan-to-value and an acceptable repayment strategy.
How much income do you need for a £10 million mortgage?
At a theoretical income multiple of five times annual income, a £10 million mortgage would require £2 million in household income. However, lending at this level may involve bespoke underwriting, and no particular income multiple or loan amount is guaranteed.
Do you need a private bank for a £5 million mortgage?
Not necessarily. Certain mainstream and specialist lenders may consider mortgages of this size. Private banks may be particularly relevant for customers with substantial assets, complex income or unusual borrowing requirements.
Can you get a £10 million mortgage if you are self-employed?
It may be possible, depending on your income, business circumstances, deposit and the lender’s criteria. Some lenders can consider company profits, dividends and other eligible income sources when assessing affordability.
Speak to Kerr & Watson About a £5 Million to £10 Million Mortgage
Borrowing £5 million, £10 million or an amount in between requires careful consideration of affordability, repayment arrangements and lender criteria.
At Kerr & Watson, we provide independent, whole-of-market mortgage advice and work with mainstream banks, specialist lenders and private banks.
We can help you understand your options and identify lenders suited to your financial circumstances.
Speak to Kerr & Watson to discuss your large mortgage requirements.
