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UK Mortgage Guide

A clear, practical guide to the UK mortgage process

Berkan Akşit · Published by ABA Financial Consultancy Ltd

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About this guide

This guide is general educational information published by ABA Financial Consultancy Ltd — it is not personalised mortgage, financial, legal or tax advice. Mortgage and finance services are provided by Berkan Akşit through Capricorn International.

Understanding the UK Mortgage Process

Buying a property in the United Kingdom can be an exciting step, whether it is for your own residence or as an investment. However, the mortgage process can feel complex if you are not familiar with lender criteria, deposit requirements, income assessment, rental calculations, interest rate types and legal steps.

This guide has been prepared to explain the mortgage process in a clear and practical way.

1 What is a mortgage?

A mortgage is a long-term loan used to buy a property or raise finance against a property. The lender provides the loan, and the property is used as security. In simple terms:

  • You put in a deposit.
  • The lender provides the mortgage.
  • You make monthly payments.
  • If the payments are not maintained, the lender may have rights over the property.

Every mortgage is subject to the borrower's income, deposit, credit history, property type, valuation, rental potential and lender criteria.

2 What are deposit and Loan-to-Value?

The deposit is the money you contribute towards the purchase from your own funds. Loan-to-Value, or LTV, is the mortgage amount compared with the property value.

Property price£500,000
Deposit£125,000
Mortgage£375,000
LTV calculation £375,000 / £500,00075% LTV

Figures are indicative and rounded to the nearest pound.

The higher the deposit, the lower the LTV. A lower LTV may sometimes provide access to more suitable products or better pricing.

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3 Residential mortgage vs Buy-to-Let mortgage

Two common mortgage types in the UK are Residential Mortgages and Buy-to-Let Mortgages.

Residential Mortgage

A residential mortgage is used when you or your family will live in the property.

  • Your income
  • Your affordability
  • Your regular commitments
  • Your credit history
  • Your deposit source
  • The suitability of the property

Buy-to-Let Mortgage

A Buy-to-Let mortgage, also known as BTL, is used when the property will be rented out to tenants. For a BTL mortgage, the lender usually reviews both the borrower's overall profile and the expected rental income from the property.

Mortgage£250,000
Interest rate5.44%
Repayment typeInterest-only
Estimated monthly paymentApprox. £1,133
125% rental cover £1,133 × 125%Approx. £1,417 pcm

Figures are indicative and rounded to the nearest pound.

This is only a simple example. Each lender has its own rental calculation method, stress rate and acceptance criteria.

4 Mortgage repayment types

There are two main mortgage repayment types.

A) Capital and Interest / Repayment Mortgage

With a repayment mortgage, your monthly payment includes both interest and capital. Over time, the mortgage balance reduces. If all payments are made as agreed, the mortgage should be fully repaid by the end of the term.

Mortgage£250,000
Interest rate5.44%
Term25 years
Estimated monthly paymentApprox. £1,526

Figures are indicative and rounded to the nearest pound.

This repayment type is commonly used for residential purchases.

B) Interest-Only Mortgage

With an interest-only mortgage, your monthly payment covers only the interest. The capital balance does not reduce during the term.

Mortgage£250,000
Interest rate5.44%
Repayment typeInterest-only
Estimated monthly paymentApprox. £1,133

Figures are indicative and rounded to the nearest pound.

This can provide a lower monthly payment. However, the original mortgage balance must still be repaid at the end of the term.

Interest-only mortgages are commonly used for Buy-to-Let investment properties, as they may help with monthly cash flow.

Compare repayment structures

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5 Interest rate types

Mortgage products can have different types of interest rates. The most common are:

Fixed Rate

With a fixed rate mortgage, the interest rate stays the same for a set period. This could be 2 years, 5 years or longer.

  • Monthly payments are stable.
  • Budgeting is easier.
  • Payments do not change during the fixed period, even if market rates increase.
  • Early Repayment Charges may apply if the mortgage is repaid or changed during the fixed period.

Tracker Rate

A tracker rate usually follows a benchmark, commonly the Bank of England Base Rate. For example: Base Rate + 1.69%.

  • If the base rate increases, the monthly payment may increase.
  • If the base rate decreases, the monthly payment may decrease.
  • Some tracker products may offer more flexibility.
  • Some tracker products may have no Early Repayment Charge.
  • Monthly payments can change and may increase if interest rates rise.

Variable Rate

A variable rate can change over time and is usually set by the lender.

6 What does a lender check for Buy-to-Let?

For a Buy-to-Let mortgage, lenders usually review:

  • Property value
  • Expected rental income
  • Deposit amount
  • Source of deposit
  • Applicant profile
  • Income and assets
  • Credit history
  • Property type
  • Leasehold or freehold position
  • Service charge and ground rent
  • Whether the property is suitable to be let
  • Whether the applicant lives in the UK or overseas
  • Whether the income is from the UK or overseas
  • Whether foreign currency income is acceptable

For overseas clients or clients with non-UK income, lender options can be more limited. This is why it is important to present the case clearly from the beginning.

Rental-cover illustration

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This is an illustration only. Lenders use different stress rates, rental-cover calculations and acceptance criteria.

7 What is an SPV / limited company purchase?

Some Buy-to-Let investors purchase property through a limited company rather than in their personal name. This is often called an SPV, which stands for Special Purpose Vehicle. An SPV is a company set up for a specific purpose, usually property investment.

  • Correct SIC code
  • Directors and shareholders
  • Company ownership structure
  • Personal guarantee requirements
  • Whether the lender accepts SPV applications
  • Tax and accounting implications
  • Management of rental income and company expenses

Tax, company structure and accounting advice should always be taken from an accountant or tax adviser.

8 The mortgage process from start to finish

Initial discussion

The first step is to understand the client's objectives.

  • Is the property for you to live in or for investment?
  • Are you purchasing personally or through a limited company?

Fact Find

The Fact Find is a detailed information form used to understand the applicant's financial position. Accurate information helps the broker assess the case properly and identify suitable lender options.

Documents

  • Passport
  • Proof of address
  • Bank statements
  • Income documents
  • Payslips or employment letter
  • Business income documents, if applicable
  • Deposit evidence
  • Source of funds / source of wealth explanation
  • Property details
  • Rental estimate, for Buy-to-Let
  • Company documents, for SPV or business income cases

Lender research

The broker reviews suitable lenders based on the client's profile and the property. Correct lender selection is especially important for overseas income, expat clients, SPV purchases, off-plan properties and high-value transactions.

Agreement in Principle / Decision in Principle

An Agreement in Principle or Decision in Principle is an initial lender indication. It is not a formal mortgage offer. The final decision is made after the full application, underwriting and valuation.

Full Application

Once the suitable lender and product have been selected, the full mortgage application is submitted. The lender reviews the documents, assesses income, checks the deposit source and considers the property.

Valuation

The lender checks the property value and suitability for mortgage purposes. For Buy-to-Let cases, rental valuation is also important.

Mortgage Offer

If the application is approved, the lender issues a formal mortgage offer.

Legal Process and Completion

The solicitor or conveyancer completes the legal work. Mortgage funds are released and the purchase completes.

9 Typical mortgage timeline

Every mortgage application is different. The timings below should be treated as a general guide only. The overall timeline can depend on document readiness, lender workload, valuation timing, solicitor progress and the complexity of the case.

StageTypical timeframe
Initial discussion and eligibility review1–3 working days
Fact Find and document preparation1–2 weeks
Lender research and AIP / DIP3–7 working days
Full mortgage application preparation and submission2–5 working days once documents are ready
Underwriting and lender review2–4 weeks
Valuation booking and report1–3 weeks
Mortgage offerUsually around 4–8 weeks from full application; complex cases can take longer
Legal process and completionUsually around 6–12 weeks; new build, off-plan, leasehold or complex source of funds cases can take longer

Overseas income, SPV / limited company purchases, document translation, missing documents, valuation queries, solicitor enquiries or developer deadlines can extend the process. For this reason, it is advisable to start the mortgage assessment as early as possible.

10 Non-English documents and translation

Some lenders may request certified or professional translations for documents that are not in English. This is particularly relevant for overseas income, foreign bank statements, company documents, tax documents, title deeds and source of funds / source of wealth evidence.

Translation requirements vary by lender. Some lenders may accept translations of specific pages or specific transactions, while in some cases a full document translation may be required. For this reason, it is important for the broker to clarify the lender requirement before the client arranges a costly translation.

Documents that may require translation include:

  • Bank statements
  • Payslips or salary slips
  • Tax documents
  • Company documents
  • Title deed documents
  • Rental agreements
  • Accountant letters or income confirmations
  • Source of funds / source of wealth supporting documents

A translation will usually need to include translator or translation company details, the date and confirmation that the translation is accurate. The lender's acceptance standard should be checked before application.

11 Common mortgage-related costs

Mortgage-related costs may include:

  • Lender product fee / arrangement fee
  • Valuation fee
  • Legal fees
  • Broker fee
  • Bank transfer fee
  • Early Repayment Charge, if applicable
  • Redemption fee
  • Stamp Duty Land Tax
  • Company setup fee, for SPV purchases
  • Accountant fee, for SPV or complex income cases

Costs vary depending on the lender, product, borrower and property.

Stamp Duty Land Tax can vary depending on whether the property is a first home, additional property, Buy-to-Let, limited company purchase or non-UK resident purchase. This should be confirmed with a solicitor or tax adviser before completion.

Explore Overpayments

The advanced ABA Mortgage Calculator includes more detailed scenario and overpayment tools — balance reduction, interest savings and term-reduction scenarios.

Open the Advanced Calculator ↗

12 Example mortgage scenarios

The scenarios below are for general educational purposes only. Every mortgage application must be assessed individually based on income, credit profile, deposit source, property type, rental potential and lender criteria.

Scenario 1 · Buy-to-Let investment purchase

An investor wants to purchase a UK property to rent out to tenants.

Property price£500,000
Deposit£125,000
Mortgage£375,000
LTV75%
Repayment typeInterest-only
Assumed interest rate5.75%
Estimated monthly mortgage paymentApprox. £1,797
125% rental cover £1,797 × 125%Approx. £2,246 pcm

Figures are indicative and rounded to the nearest pound.

In this scenario, the lender would usually review the rental potential of the property, source of deposit, borrower profile, credit history and property suitability.

Scenario 2 · Overseas investor

A client lives overseas and receives income outside the UK. They want to purchase an investment property in the United Kingdom. In this type of case, lender options can be more limited. Some lenders may accept overseas income, foreign currency income or overseas residency, while others may not.

  • Overseas income documents
  • Bank statements
  • Deposit evidence
  • Source of funds / source of wealth explanation
  • UK or overseas tax documents, if required
  • Rental estimate for the property
  • The client's overall asset and liability position

Correct lender selection is very important in these cases. Preparing the application clearly from the beginning can help the process move more smoothly.

Scenario 3 · Residential mortgage for a property occupied by your child

Some families may wish to purchase a property for a child who is living, studying or working in the United Kingdom. If the child is aged 18 or over and will live in the property, residential mortgage options may be considered in certain circumstances.

  • The property may be purchased in the child's name.
  • Parents may provide deposit support.
  • Parents may be considered as guarantors or joint borrowers with some lenders.
  • If the child's income is not sufficient, it may be possible to review whether parental income can support the application.

In these cases, the lender will carefully assess who will live in the property, where the income comes from, how the mortgage will be paid and where the deposit has come from. This type of structure is not accepted by every lender. Lender criteria should therefore be checked before proceeding.

Scenario 4 · Joint Borrower Sole Proprietor / Guarantor support

In some residential mortgage applications, the property may be owned by one person while another family member supports the mortgage application.

  • The child will live in the property
  • The child's own affordability is not sufficient
  • Parental income is needed to support the application
  • The family wishes to keep the ownership structure simpler

Some lenders may allow this type of arrangement. However, the lender will assess the supporting borrower's age, income, existing commitments, credit history and suitability for the mortgage term. This structure is not suitable for every case. Legal, tax and lender criteria should all be considered.

Scenario 5 · Buy-to-Let purchase through an SPV / limited company

Some investors may prefer to purchase a property through a limited company rather than in their personal name. This company is often structured as an SPV, which stands for Special Purpose Vehicle.

  • The property is purchased in the limited company's name.
  • The company is set up for property investment.
  • Parents may be directors or shareholders.
  • Subject to appropriate advice and lender criteria, children may also be included in the company ownership structure.
  • The lender reviews the company structure, directors, shareholders, personal guarantee requirements and source of deposit.

This structure is commonly considered for Buy-to-Let investment properties. However, purchasing through a company has tax, SDLT, accounting and lender criteria implications. If an SPV purchase is being considered, separate advice should be obtained from an accountant, tax adviser and solicitor in addition to the mortgage assessment.

Scenario 6 · Family wealth and long-term planning

Some families view property purchase not only as an investment today, but also as part of long-term family planning.

  • Should the property be purchased personally?
  • Should it be purchased in the child's name?
  • Should it be purchased through a limited company?
  • Should children be added to the company structure in the future?
  • Should the property be treated as residential or Buy-to-Let?
  • Will the deposit be gifted by the family?
  • Who will be responsible for the mortgage payments?

There is no single correct answer to these questions. The most suitable structure depends on the family's objectives, income position, the child's age, the intended use of the property, tax position and lender criteria.

A mortgage broker can assess lender options and mortgage structure. However, separate professional advice should be obtained from a solicitor and tax adviser for ownership, tax, inheritance planning and legal structure matters.

Try your own scenario

The original scenarios above are unchanged. Enter your own figures here to explore an indicative scenario of your own.

13 Why work with a mortgage broker?

The mortgage process is not only about finding the lowest interest rate. Choosing the right lender, preparing the application correctly, presenting the documents clearly and structuring the case in line with lender criteria are all important parts of the process.

Working with a broker can be especially valuable if:

  • You receive income from outside the UK
  • You are new to the UK
  • You are an expat or overseas investor
  • You are buying a Buy-to-Let property
  • You are purchasing through an SPV / limited company
  • You are buying an off-plan or new build property
  • You have multiple income sources
  • You have complex income or foreign currency income
  • You have previously been declined by a lender

At ABA Financial Consultancy, our aim is to understand your profile, assess suitable lender options and guide you through the mortgage process from start to finish.

14 Mortgage terminology

Some common mortgage terms are explained below in simple language.

TermMeaning
AIP / DIPAgreement in Principle / Decision in Principle. An initial lender indication that the case may be acceptable. It is not a formal mortgage offer.
LTVLoan-to-Value. The mortgage amount compared with the property value. For example, a £375,000 mortgage on a £500,000 property is 75% LTV.
DepositThe money the client contributes towards the purchase from their own funds.
BTLBuy-to-Let. A mortgage type used for properties intended to be rented out to tenants.
Residential MortgageA mortgage used for a property that the applicant or their family will live in.
SPVSpecial Purpose Vehicle. A limited company structure commonly used for property investment.
Repayment MortgageA repayment type where the monthly payment includes both interest and capital.
Interest-Only MortgageA repayment type where the monthly payment covers only interest, with the capital balance due at the end of the term.
Fixed RateA mortgage product where the interest rate stays the same for a set period.
Tracker RateAn interest rate that usually follows a benchmark such as the Bank of England Base Rate.
ERCEarly Repayment Charge. A charge that may apply if the mortgage is repaid early or the product is changed during a restricted period.
ValuationThe lender's assessment of the property value and mortgage suitability.
UnderwritingThe lender's review of income, credit profile, deposit source, property details and supporting documents.
CompletionThe stage when the purchase legally completes and mortgage funds are released.
SDLTStamp Duty Land Tax. A tax that may be payable on property purchases. It varies depending on the buyer and property circumstances.
Source of Funds / Source of WealthInformation and evidence explaining where the deposit or wealth has come from.
JBSPJoint Borrower Sole Proprietor. A structure where one party may support the mortgage but may not be included on the property ownership.

15 What is the next step?

If you are considering purchasing property in the United Kingdom, it is important to assess your mortgage position as early as possible.

  • How much you may be able to borrow
  • Which lender options may be suitable
  • Whether your income and deposit documents are likely to be acceptable
  • Whether Residential or Buy-to-Let is more appropriate
  • Whether purchasing personally or through a limited company may be possible
  • Which documents will be required for the process

Important notice · General educational notice

This guide is for general educational purposes only and does not constitute personal mortgage advice. Mortgage products, interest rates, lender criteria, fees and eligibility requirements depend on your personal circumstances, income structure, credit profile, property valuation and market conditions. For tax, company structure and legal matters, separate advice should be obtained from a solicitor, accountant or tax adviser. Your property may be repossessed if you do not keep up repayments on your mortgage.

Let's talk about your mortgage

You can contact us to discuss your mortgage options — in English or Turkish.

Mortgage and finance services are provided by Berkan Akşit through Capricorn International. Capricorn Commercial and Capricorn International are trading styles of Capricorn Wealth Management Limited. Capricorn Wealth Management Limited is an Appointed Representative of The Fiducia Network Ltd, which is authorised and regulated by the Financial Conduct Authority under FRN 917537. Full regulatory information. ABA Financial Consultancy Ltd provides client preparation, educational resources, digital tools, property consultancy and introductory services.

Your home may be repossessed if you do not keep up repayments on your mortgage.

ABA Financial Consultancy Ltd · Company number 13340154 · 85 Great Portland Street, London W1W 7LT · ICO ZB648343

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