£1 Million Mortgage: Monthly Payments, Deposit and Income

A £1 million mortgage would cost approximately £5,846 per month on repayment over 25 years, or £4,167 per month on interest-only, at an illustrative annual interest rate of 5 per cent. Your actual payments depend on the rate, term and repayment structure. These figures exclude fees and are not a mortgage offer. With interest-only, the £1 million capital remains repayable at the end of the term. 

£1 Million Mortgage Monthly Payments

The table compares monthly payments on £1 million borrowing at different illustrative rates.

Illustrative annual interest rate	Interest-only monthly payment	Repayment monthly payment over 25 years
3%	£2,500	£4,742
4%	£3,333	£5,278
5%	£4,167	£5,846
6%	£5,000	£6,443
7%	£5,833	£7,068

 Assumptions: 25-year term, monthly payments and an unchanged rate. Figures are rounded to the nearest pound and exclude fees. Rates are illustrative, not available offers

How Does the Mortgage Term Affect Your Payments?

A longer repayment term reduces your monthly payments but increases the total interest paid, assuming the same interest rate. At an illustrative annual rate of 5 per cent, extending a £1 million repayment mortgage from 15 to 30 years reduces monthly payments from approximately £7,908 to £5,368, while more than doubling the total interest.

Mortgage term	Monthly repayment	Total interest over the term
15 years	£7,908	£423,429
20 years	£6,600	£583,894
25 years	£5,846	£753,770
30 years	£5,368	£932,558

Assumptions: £1 million repayment mortgage, monthly payments and 5 per cent interest throughout. Figures are rounded; total interest uses unrounded payments. Fees are excluded. This is not a mortgage offer.

For example, choosing 30 years rather than 25 years lowers the monthly payment by approximately £478, but adds around £178,788 in total interest under these assumptions. A shorter term reduces the overall interest cost but requires a greater monthly commitment.

For an interest-only mortgage, extending the term does not reduce the monthly interest payment if the loan balance and rate stay unchanged. It extends the period over which you pay interest, with the capital still repayable at the end.

Interest-Only or Repayment: What Changes the Cost?

Interest-only payments cover interest alone. Repayment payments also reduce the capital balance. Lower interest-only payments do not mean a lower overall borrowing cost.

For a £1 million mortgage at an illustrative annual rate of 5 per cent over 25 years:

	Interest-only	Repayment
Monthly payment	£4,167	£5,846
Capital outstanding at the end	£1,000,000	£0
Total interest paid over the term	£1,250,000	Approximately £753,770

Assumptions: unchanged rate, all scheduled payments made and no extra capital repayments. Fees and separate repayment-plan costs are excluded. Figures are illustrative.

Interest-only reduces the monthly mortgage commitment by approximately £1,679 in this example. However, any money needed to fund your capital repayment strategy must be budgeted for separately. Interest-only borrowing requires a credible repayment strategy acceptable to the lender. Having substantial wealth does not, by itself, establish how the loan will be repaid. The strategy must address whether sufficient funds will be available when required and should be reviewed throughout the term.

What Determines Your £1 Million Mortgage Rate?

There is no single interest rate for a £1 million mortgage. Your options depend on the equity available, income, credit profile, property, residency and mortgage structure, alongside market conditions when you apply. These factors influence both which lenders will consider your application and the terms they may offer.

Factor	How it affects the assessment
Deposit or equity	Lower loan-to-value can improve rate options, without guaranteeing the lowest overall cost.
Income and commitments	Lenders assess income, debts and outgoings. Treatment of variable earnings differs.
Property	Valuation, location, construction, condition and use affect eligibility.
Residency and overseas income	Residency and income currency affect lender choice and exchange-rate assessment.
Financial complexity	Business interests and complex ownership may require individual underwriting and documentation.
Lender and product selection	Compare accepted circumstances, fixed periods, repayment structures, fees and flexibility.

Compare the overall cost, rather than the headline rate alone. Arrangement fees can outweigh a small rate saving, while early repayment charges and overpayment restrictions may matter if you expect to reduce the balance using a bonus or business-sale proceeds.

What Other Costs Should You Allow For?

The cost of a £1 million mortgage extends beyond monthly payments. Depending on the lender, product and transaction, you may also pay arrangement, broker, valuation and legal fees. These should be budgeted for separately from your deposit and property-purchase costs.

Mortgage-related cost	What to check
Lender fees	Whether arrangement, product or booking fees apply, when they are payable and whether they are refundable if the application does not proceed.
Broker fees	The amount, what service it covers, when payment is due and any applicable refund terms.
Valuation fees	Whether the lender charges for its valuation. This assessment is separate from a survey commissioned to examine the property’s condition.
Legal fees	The costs of legal work required for the mortgage, including any separate lender representation or additional work for complex ownership arrangements.
Early repayment charges	Whether charges apply if you refinance, repay the mortgage or make overpayments beyond the permitted allowance during a specified period.

Separate Mortgage Costs from Purchase Costs

If you are buying, allow separately for applicable property transaction tax, purchase conveyancing, searches, registration, a property survey and moving costs. The tax calculation relates to the property purchase and your circumstances, rather than simply the £1 million mortgage amount. Some legal work overlaps with the mortgage process, so request an itemised quote to avoid counting the same expense twice.

Compare the combined cost over the period you expect to keep the mortgage. A lower interest rate with higher fees may not offer the lowest overall cost. If a fee is added to the loan, it increases the balance and attracts interest.

What Income Do You Need for a £1 Million Mortgage?

There is no universal salary requirement for a £1 million mortgage. As a simple illustration, borrowing at five times annual gross income would imply £200,000 of individual or combined income. This is arithmetic, not an eligibility threshold: lenders also assess expenditure, existing commitments, mortgage term and their own affordability criteria.

For borrowers with several income sources, the key question is how much of that income a lender will accept.

• Salary: Basic gross salary, employment history and whether earnings are permanent or contractual.
• Bonuses: Payment history and whether bonuses are guaranteed, discretionary or deferred. A lender may average them or accept only a proportion.
• Dividends: Dividend history, company accounts and whether the business can sustain distributions.
• Partnership income: Your profit share, drawings and track record, particularly if you have recently become a partner.
• Overseas income: Currency, country of origin, supporting documents and exchange-rate risk. Acceptance varies by lender.

Some lenders consider income beyond basic salary, including bonuses and profit shares, while foreign-currency earnings may require additional assessment. These approaches are lender-specific, rather than rules that apply across the market. Substantial assets may be relevant to certain lending assessments, but net worth is not automatically a substitute for demonstrating affordability. Interest-only borrowing also requires an acceptable strategy for repaying the capital. Discuss your income and borrowing requirements with Enness.

What Deposit Do You Need?

The deposit required for a £1 million mortgage depends on the property value and the loan-to-value ratio the lender accepts. A £1 million mortgage means borrowing £1 million; it does not mean buying a £1 million house. For a purchase, your deposit covers the difference between the purchase price and the loan, with fees and purchase costs budgeted separately.

Illustrative property value	Mortgage amount	Deposit or equity
£1,250,000	£1,000,000	£250,000
£1,500,000	£1,000,000	£500,000
£2,000,000	£1,000,000	£1,000,000

These are arithmetic illustrations, not available lending terms. They assume the lender’s valuation equals the purchase price. Actual requirements depend on your circumstances, the property, mortgage structure and lender criteria.

For example, buying a £1 million house with a £250,000 deposit would require a £750,000 mortgage, rather than £1 million borrowing. If you are remortgaging, existing equity takes the place of a purchase deposit. The lender assesses the proposed loan against its valuation of your property. A valuation below your agreed purchase price can mean you need additional funds to complete.

How Enness Can Help With a £1 Million Mortgage

Enness starts by assessing your borrowing requirements, property plans, income, assets and existing commitments. This helps establish which lender routes may be appropriate and how different mortgage structures could fit your circumstances.

Assessing Your Requirements

The initial discussion covers whether you are purchasing or remortgaging, your available deposit or equity, intended timescale and preferred repayment approach. Where income includes bonuses, dividends, partnership earnings or overseas payments, the assessment considers how these can be evidenced.

Selecting Suitable Lenders

Enness considers relevant mainstream, private-bank and specialist lending routes, comparing eligibility, overall cost, repayment structure and flexibility. The aim is to identify lenders suited to your circumstances, rather than assume a £1 million loan requires a particular type of bank. 

Presenting Your Application

A complex application needs a clear explanation supported by appropriate documents. Enness brings together the relevant income, asset and property information, addresses potential underwriting questions and liaises with the lender as the application progresses.

A Relevant Published Enness Case

In a published case involving a Channel Islands-based borrower, Enness arranged a UK mortgage of just over £1 million, alongside bridging finance against an existing residence. The application involved a non-standard property and business income undergoing a period of transition. The case illustrates the importance of presenting the borrower’s wider circumstances clearly. Past cases do not indicate the terms or outcome available to other borrowers.

Discuss Your £1 Million Mortgage Options

Share your intended borrowing amount, approximate property value and timescale to start a confidential discussion. Any mortgage remains subject to status, valuation and lender approval.

£1 Million Mortgage FAQs

Can I Get a £1 Million Mortgage to Remortgage an Existing Property?

Potentially, yes. The lender will assess your property value, outstanding borrowing, affordability and the purpose of any additional funds. If you leave your current mortgage early, check whether early repayment charges apply.

Can I Make Overpayments on a £1 Million Mortgage?

This depends on the mortgage terms. Some products permit overpayments up to a specified allowance without an early repayment charge. Check the limits and how additional payments will affect your balance, monthly payments or remaining term.

What Happens When My Fixed Mortgage Rate Ends?

Unless you arrange another deal, your mortgage will usually move to the follow-on rate specified in your offer, which may change your monthly payments. Review your options before the fixed period ends, allowing time for any new assessment and application.

Will a Mortgage Calculator Tell Me Whether I Can Borrow £1 Million?

No. A repayment calculator estimates payments using the loan amount, interest rate and term entered. It does not establish eligibility or confirm available terms. A lender must assess your finances, credit profile and property.

Does a Mortgage Agreement in Principle Guarantee Approval?

No. An agreement in principle gives an initial indication of potential borrowing based on the information assessed. A formal offer depends on further checks, supporting documents, underwriting and an acceptable property valuation.