How Much Does A £5 Million Pound Mortgage Cost?

What are the repayments on a £5 million mortgage?

A £5 million mortgage can cost anywhere from around £16,000 to £35,000+ per month depending on:

• Interest rates
• Mortgage term
• Deposit size
• Repayment type
• Your overall financial profile

The exact cost will depend on whether the mortgage is repayment or interest-only, the lender you use, and how your income is structured.

High-value mortgages are often assessed differently to standard residential lending, with many borrowers using specialist lenders or private banks.

What affects the cost of a £5 million mortgage?

Interest Rates

The interest rate on your mortgage significantly influences your monthly repayments. A lower interest rate means reduced payments, but the rate you receive will depend on various factors, including your financial situation, mortgage type, and the lender’s criteria.

Many private banks and specialist lenders offer bespoke pricing for larger mortgages, particularly where clients have strong assets, investments, or complex income structures.

Loan-to-Value (LTV) Ratio

The LTV ratio reflects how much of the property’s value you are borrowing. A higher deposit often leads to better interest rates and terms. For a £5 million mortgage, lenders typically offer the best rates for LTVs between 60% and 70%, whereas a lower deposit of 10% or 15% may result in higher borrowing costs.

Mortgage Term

The repayment period plays a crucial role in determining affordability. A longer term reduces monthly instalments but increases the overall interest paid. Most mortgage terms range from 15 to 30 years, depending on your age and future financial plans. Many lenders require the mortgage to be fully repaid by age 75, but eligibility criteria vary.

Fixed vs variable rates on a £5 million mortgage

Borrowers can usually choose between:

• Fixed-rate mortgages — where payments remain stable for a set period
• Tracker or variable mortgages — where payments move with interest rates

Many high-net-worth borrowers prioritise flexibility, particularly where bonuses, investments, or asset sales may be used to reduce borrowing later.

Do private banks offer better rates on large mortgages?

In some cases, yes.

Private banks may offer more flexible underwriting and bespoke pricing for high-net-worth individuals, particularly where clients have:

• Significant assets or investments
• Complex income structures
• Foreign currency income
• Large deposits
• Existing banking relationships

However, private banking is not always the cheapest option, so comparing specialist lenders and mainstream banks is still important.

When do people use private banks for large mortgages?

Private banks are commonly used where borrowers have:

• Complex income structures
• Significant investments or assets
• International income
• Business ownership
• Large bonus structures
• High-value property portfolios

These lenders can often take a more flexible approach compared to standard high street underwriting.

Example monthly repayments on a £5 million mortgage

Here’s a breakdown of potential repayment amounts based on different interest rates and terms:

The examples below are illustrative only and actual costs will depend on lender criteria, fees, repayment type, and your financial circumstances.

Example 1: 25-Year Term at 4% Interest

• Estimated Monthly Payment: ~£26,390
• Total Repayment: £7,917,000

Example 2: 25-Year Term at 5% Interest

• Estimated Monthly Payment: ~£29,230
• Total Repayment: £8,769,000

Example 3: 30-Year Term at 4% Interest

• Estimated Monthly Payment: ~£23,870
• Total Repayment: £8,595,600

These figures are based on a standard repayment mortgage where both capital and interest are repaid monthly. Many high-value borrowers use interest-only mortgages to reduce monthly commitments and improve cash flow flexibility.

For instance, a £5,000,000 mortgage at 4% interest on an interest-only basis would cost around £16,667 per month, compared to £26,390 for a repayment mortgage.

To calculate an estimate based on your circumstances, try our mortgage calculator on the Kerr & Watson website.

Can you get a £5 million interest-only mortgage?

Yes — many lenders offer interest-only options for large mortgages.

However, lenders will usually require a clear repayment strategy, such as:

• Investments
• Business assets
• Property sales
• Bonuses or vested shares
• Trust income

Interest-only mortgages are more common within private banking and specialist lending.

Because the balance is not being repaid monthly, lenders will assess repayment strategies very carefully before approving large interest-only borrowing.

How much deposit do you need for a £5 million mortgage?

Deposit requirements for a £5 million mortgage will vary by lender, but typical scenarios include:

• 10% Deposit (£500,000) — Available with some lenders, although options may be limited.
• 20% Deposit (£1,000,000) — Often provides access to a wider range of lenders and rates
• 40% Deposit (£2,000,000) — Usually provides access to the most competitive pricing

Can you get a £5 million mortgage with a smaller deposit?

Potentially, yes.

Some lenders may consider loan-to-values above 80%, but options become more limited and interest rates may increase significantly.

Larger deposits usually improve:

• Lender choice
• Interest rates
• Affordability calculations
• Overall underwriting flexibility

Additional Costs and Fees

Arrangement Fees

Lenders typically charge an arrangement fee, either as a fixed amount (£5,000–£10,000) or as a percentage of the loan. For example, a 1% arrangement fee on a £5 million mortgage would equate to £50,000.

Valuation and Legal Fees

Property valuations generally cost between £1,000 and £4,000, depending on the property value. Legal fees can range from £2,000 to £5,000, depending on the complexity of the transaction. Your adviser can help you obtain quotes from surveyors and solicitors to plan for these expenses.

Stamp duty costs on high-value properties

Stamp duty can be a significant additional expense when purchasing a property requiring a £5 million mortgage.

Depending on the property value and whether it is an additional property, stamp duty costs can run into hundreds of thousands of pounds.

This should always be factored into overall affordability and liquidity planning.

How much income do you need for a £5 million mortgage?

Lenders expect a high income threshold for a £5 million mortgage. Many lenders may expect household income exceeding £1 million per year, although this varies significantly depending on assets, liabilities, deposit size, and repayment structure.

For high-net-worth individuals or those with non-traditional income sources, lenders may require additional financial documentation, such as:

• Bonuses or commission earnings
• Income received in foreign currency
• Business profits or self-employed income
• Dividends or investment returns
• Trust fund distributions

An experienced mortgage adviser can assess your financial profile and provide clear guidance on your borrowing potential and required documentation.

What income sources can lenders use for a £5 million mortgage?

High-value lenders can often assess a wider range of income sources, including:

• Salary and bonuses
• Dividends
• Business profits
• Investment income
• Foreign currency income
• Trust income
• Share options or carried interest
• Rental income

Some private banks may also consider asset-backed or liquidity-based lending where substantial investments are held.

What credit score do you need for a £5 million mortgage?

There is no universal minimum credit score requirement, but lenders typically expect strong overall financial management for large mortgages.

Factors lenders review include:

• Credit history
• Existing debts
• Bank account conduct
• Asset position
• Liquidity
• Complex income structures

Even applicants with high incomes may face restrictions if affordability or financial conduct raises concerns.

Frequently asked questions about £5 million mortgages

How much are repayments on a £5 million mortgage?

Monthly payments can range from around £16,000 to £35,000+ depending on interest rates, mortgage term, and repayment type.

Can you get a £5 million mortgage interest-only?

Yes — many high-net-worth borrowers use interest-only mortgages with an acceptable repayment strategy.

How much deposit do you need?

Most lenders prefer deposits between 20% and 40%.

Do private banks offer £5 million mortgages?

Yes — private banks commonly lend on high-value properties and complex income structures.

Can self-employed applicants get a £5 million mortgage?

Yes — specialist lenders and private banks often consider self-employed income, business profits, and dividends.

Can foreigners get a £5 million mortgage in the UK?

Yes — some lenders and private banks will consider foreign nationals, expats, and overseas income, although criteria is usually stricter.

How long does a £5 million mortgage application take?

Large mortgage applications can take longer than standard residential cases, particularly where private banking underwriting or complex income verification is involved.

Conclusion

A £5 million mortgage requires careful planning, strong financial structuring, and access to the right lenders.

Whether you are buying a prime residential property, refinancing existing assets, or structuring a complex high-net-worth mortgage, lender choice can make a significant difference to rates, flexibility, and borrowing potential.

Need help arranging a £5 million mortgage?

At Kerr & Watson, we specialise in high-value mortgages and work with private banks, specialist lenders, and high-net-worth mortgage providers across the market.

Speak to Kerr & Watson today for bespoke high-value mortgage advice tailored to your financial circumstances.