Large Mortgage UK: How to Borrow £500k–£2m+

Large Mortgage UK: How to Borrow £500k–£2m+

If you’re looking to secure a large mortgage in the UK, you’re likely trying to borrow £500,000 or more, often for property in London or higher-value areas. At this level, mortgage lending becomes more specialist. The lender you choose, how your income is assessed, and how your application is structured can all significantly impact how much you can borrow.

Quick answer

In the UK, a large mortgage is typically £500,000+.

Most borrowers need:

• 10–25% deposit
• Strong income (often £100k–£300k+)
• A lender that matches their income structure

In simple terms, getting a large mortgage isn’t just about income, it’s about choosing the right lender.

If you’re unsure what you could borrow, we can usually give you a clear answer quickly based on real lender criteria.

What is considered a large mortgage in the UK?

A large mortgage is usually:

• £500,000+ (high street threshold)
• £750,000+ (specialist lending territory)
• £1 million+ (private bank / high-net-worth lending)

At this level:

• Applications are often manually underwritten
• Affordability is assessed more flexibly
• Lender choice becomes critical

How much can you borrow on a large mortgage?

Most lenders use income multiples:

• Standard lenders: 4.0–4.5× income
• Specialist lenders: 5.0–6.0× income

Example

• Income: £150,000
• Standard lender: £675,000
• Specialist lender: £825,000

The difference is lender choice, not your income.

Why lender choice can change how much you borrow

One of the biggest misconceptions is that all lenders offer similar borrowing amounts.

In reality:

• Some lenders cap borrowing at 4.5× income
• Others offer 5–6× income for the right applicant
• Some include bonus or variable income fully
• Others only include a small percentage

This means:

Two borrowers with identical incomes can receive very different results depending on the lender. For larger mortgages, choosing the right lender can make a significant difference to both approval chances and borrowing amount.

Can a mortgage broker help you borrow more?

In many cases, yes. Different lenders assess income in very different ways.

A broker can:

• Match you to lenders offering higher income multiples
• Use lenders that include bonus, dividends, or retained profit
• Structure your application to maximise affordability

This is especially important in London, where borrowing requirements are higher.

How much deposit do you need?

Typical deposits:

• 10% → minimum entry point
• 15–25% → better rates + more lenders
• 25%+ → strongest position

Larger deposits:

• Improve rates
• Increase lender choice
• Reduce affordability pressure

Who can get a large mortgage?

Large mortgages are commonly secured by:

• High earners (finance, law, tech, medical)
• Self-employed / company directors
• Contractors and freelancers
• High-net-worth individuals

The key is not your job title, it’s how your income is assessed.

Why large mortgages are often declined

Most declines happen because:

• The wrong lender was chosen
• Income was assessed incorrectly
• The case didn’t fit automated criteria

Not because the borrower “couldn’t afford it”.

Oportfolio insight

Across London and the South East, we regularly see borrowers able to borrow significantly more simply by switching lenders. Two lenders offering similar rates can produce very different borrowing results. In many cases, the biggest difference is not income, it’s lender selection.

Not sure what you could borrow?

If you’re planning to borrow £500k+ we can usually tell you quickly:

• How much you could realistically borrow
• Which lenders are most suitable
• Whether your income will be accepted

Book a quick large mortgage strategy call and get clarity before you apply.

FAQ: How to Borrow £500k–£2m+