Million pound mortgage guide

A million pound mortgage is a residential mortgage where the loan amount is £1,000,000 or more. While the basic principles of borrowing still apply, lending at this level is often more bespoke: lenders may ask for more detailed evidence, review risk more carefully, and place greater emphasis on the property and your overall financial position.

This guide sets out the key moving parts of £1m+ lending, so you can understand what lenders typically focus on and where preparation can reduce avoidable friction.

What lenders mean by a £1m+ mortgage

The “million pound” label usually refers to the mortgage loan amount, not the purchase price.

For example:

• A home worth £1.5m with a £1.1m mortgage would fall into the million pound category.

Because the lender’s exposure is larger, the application is commonly treated as higher value and higher scrutiny.

How a million pound mortgage is assessed

Million pound lending is typically assessed with a case-by-case approach. Affordability and creditworthiness still matter, but lenders often look beyond simple checklists and consider the quality of your circumstances.

1) Income assessment (including non-standard income)

At £1m+, lenders frequently focus on income quality and sustainability.

This can include:

• Salary
• Bonuses and commission
• Dividends
• Self-employed or company director earnings
• Retained profits (where relevant)

The question lenders tend to ask is not only “can you afford it today?”, but whether the income appears stable enough to support the mortgage over time.

2) Affordability and stress testing

Even where you can meet payments now, lenders usually want confidence that repayments remain manageable if circumstances change.

Expect affordability to consider:

• Your repayment capacity
• Your regular commitments and outgoings
• How the mortgage performs under more cautious assumptions (often described as stress testing)

3) Credit profile and existing obligations

A strong credit history is helpful at any level, but at £1m+ lenders may review credit and commitments more closely.

They may look at:

• Missed payments or adverse markers
• Patterns of borrowing and repayment
• Current debts and financial commitments

Being clear and consistent with the information provided can help avoid delays caused by later clarification.

4) Deposit, LTV and source of funds

Loan-to-value (LTV) is a major factor in high-value lending. In many cases, million pound mortgages are arranged at lower LTVs than typical mainstream borrowing.

Lenders may also scrutinise:

• The source of the deposit
• How the deposit is evidenced
• How the overall risk profile changes as LTV changes

5) Property valuation, condition and saleability

Because the lender’s risk is higher, the property itself can be particularly important.

Lenders may consider:

• Market value and valuation approach
• Condition and any factors that could affect future saleability

Some property types may attract additional attention compared with standard residential stock.

Repayment vs interest-only at £1m+

At this level, borrowers may explore both repayment and interest-only structures.

Interest-only

With interest-only, monthly payments typically cover interest only, with the capital due later.

Lenders usually want to understand how the capital will be repaid, which may involve a credible plan such as:

• Savings
• Investment growth
• Sale of an asset
• Another agreed repayment route

Repayment

With repayment, monthly payments cover interest and capital, aiming to clear the balance by the end of the term.

Repayment affordability is still assessed carefully, but the lender’s view of risk can differ because the balance reduces over time.

Mortgage rates, product choice and the importance of term

For many borrowers, the headline rate is only part of the decision. At £1m+ levels, the “right” mortgage is often about fit:

• How long you want payment certainty
• Whether you expect to move, remortgage or restructure
• How early repayment implications could affect your plans

Because pricing and product availability can vary by lender and over time, it’s usually more helpful to focus on the overall structure rather than trying to anchor everything to a single number.

Fees and costs to expect

Million pound mortgages can involve the same broad categories of cost as other lending, but the structure and timing may vary.

Common costs include:

• Arrangement fees
• Valuation fees (which may be included or charged separately depending on the lender)
• Legal fees for the mortgage process

Some higher-value or more complex cases may also involve additional requirements.

Complex income: what lenders may look for

Many million pound borrowers have income that isn’t purely salary-based. Lenders may treat different income types differently, and they often want evidence that supports both the amount and the likelihood it will continue.

Examples include:

• Bonuses and commission: often assessed with reference to track record and consistency
• Dividends and company income: may be supported by accounts and dividend history
• Foreign currency income: may be considered by some lenders, but acceptance is not universal and evidence requirements can vary

Where income is complex, the way the application is presented can matter.

Bad credit and £1m+ lending

Bad credit does not automatically rule out a £1m+ mortgage, but it can narrow options and increase scrutiny.

Lenders typically want clarity on:

• What happened and when
• Whether the situation has improved
• How repayments have been managed since

In these cases, a well-prepared application with clear explanations and supporting evidence can be especially important.

Remortgaging a million pound mortgage

Remortgaging at £1m+ can feel more involved due to lender scrutiny, particularly where:

• Income has changed since the original mortgage
• Commitments have increased or reduced
• The property valuation process needs to be revisited

Product-specific conditions can also matter, especially if you are moving away from a fixed deal.

Million pound buy-to-let: what’s different

A million pound buy-to-let mortgage is often assessed differently from a residential mortgage because underwriting is commonly driven more by the rental income and the investment risk profile.

Lenders may focus on:

• Expected rental income and coverage
• Property characteristics and suitability
• Overall risk and structure of the loan

Interest-only structures may also be considered depending on the lender’s product range and the borrower’s strategy.

Common scenarios at £1m+

While every case is unique, there are recurring patterns where million pound lending can be more achievable.

Examples include:

• A borrower with stable, well-evidenced employment income purchasing a mainstream residential property
• A business owner with higher but variable income, where structuring and evidence are key
• A borrower buying a distinctive property that may fall outside standard lending assumptions, where lender selection and risk framing matter

Why mortgage structure can matter as much as the loan size

At £1m+ levels, the mortgage structure can influence how lenders assess risk and how the mortgage fits your longer-term plan.

Depending on your circumstances, you may explore:

• Repayment or interest-only options
• Fixed-rate or tracker-rate structures
• Part repayment/part interest-only approaches
• Flexible arrangements that align with wider financial planning

Key takeaways

• A million pound mortgage generally refers to a loan amount of £1,000,000+.
• Lenders often apply more detailed underwriting, with extra focus on income evidence, affordability and risk.
• Deposit, LTV and source of funds can significantly affect lender choice.
• Interest-only may be available, but lenders typically expect a credible repayment approach.
• Complex income and buy-to-let cases are often assessed differently from standard residential lending.

Common mortgage structures and features at this level

While products vary by lender and borrower, million pound mortgages commonly include:

• Repayment or interest-only options
• Fixed-rate or tracker-rate structures
• Flexibility depending on your wider financial plan
• Bespoke approaches in more complex cases, where supported by evidence

Choosing the right structure is usually about balancing affordability, flexibility and long-term fit—not just the initial monthly payment.