First-Time Buyer Mortgage in London

First-Time Buyer Mortgage in London

Buying your first home in London is exciting. It can also feel like trying to solve a financial puzzle where every piece — deposit, income, credit history, mortgage rates, affordability and property price — has to fit before a lender will say yes.

The challenge is particularly significant in London because property prices can require a much larger mortgage than buyers elsewhere in the UK. A 5% deposit may technically be enough for some mortgage products, but the bigger question is whether your income, existing commitments and chosen property make the monthly repayments affordable.

The good news is that being a first-time buyer does not mean you have to navigate the process alone. Understanding how lenders assess your application, preparing your finances before applying and obtaining the right mortgage in principle can put you in a much stronger position.

This guide explains how first-time buyer mortgages in London work, how much deposit you may need, what lenders look for, how affordability is assessed, which costs you need to budget for and how to move from saving your deposit to completing your first home purchase.

Key Takeaways

  • A first-time buyer mortgage is not a special type of mortgage; it is a mortgage for someone purchasing their first residential property.
  • You will usually need a deposit of at least 5% of the property’s purchase price, although a larger deposit can improve your choice of mortgage deals and reduce your loan-to-value ratio.
  • Your income is only one part of the affordability assessment. Lenders also consider your regular spending, debts, credit history, deposit and other financial commitments.
  • A mortgage in principle can help establish your realistic borrowing range before you start making offers on properties.
  • London buyers should budget for more than the deposit, including legal fees, surveys, mortgage costs, insurance, moving expenses and potentially Stamp Duty.
  • A mortgage broker can help you compare lenders and identify options that fit your circumstances rather than simply choosing a mortgage based on the lowest advertised rate.
  • The strongest applications are usually built before the property search begins, with your deposit, documentation, credit profile and affordability position already understood.

Table of Contents

What Is a First-Time Buyer Mortgage in London?

A first-time buyer mortgage is simply a residential mortgage used by someone buying their first home.

There is no single mortgage product that every first-time buyer must use. Instead, you may have access to different mortgage products depending on your income, deposit, credit history, employment status, property type and the lender’s criteria.

MoneyHelper defines a first-time buyer as someone buying their first home who has never previously owned a residential property in the UK or another country. There can be important exceptions and individual scheme rules, so eligibility should always be checked before assuming you qualify for a first-time-buyer benefit.

For London buyers, the fundamental calculation is:

Property price − deposit = mortgage required

For example:

  • Property price: £500,000
  • 10% deposit: £50,000
  • Mortgage required: £450,000
  • Loan-to-value: 90%

The size of the mortgage you need then has to be considered against your income and overall affordability.

This is why simply having enough money for a deposit does not automatically mean you can afford a particular London property.

London Changes the Affordability Equation

A buyer with a £50,000 deposit might be in a strong position to purchase a £500,000 property from a deposit perspective.

However, they still need to demonstrate that the resulting mortgage is affordable.

This is where many first-time buyers make their first mistake.

They start with the question:

“How much house can my deposit buy?”

The better question is:

“How much can I comfortably borrow while keeping the property affordable?”

Your deposit should therefore be considered alongside your income, expenditure and mortgage requirements rather than in isolation.

How Much Deposit Do You Need to Buy in London?

Many first-time buyer mortgage products require a deposit of at least 5% of the property’s value.

For example:

Property price5% deposit10% deposit15% deposit
£300,000£15,000£30,000£45,000
£400,000£20,000£40,000£60,000
£500,000£25,000£50,000£75,000
£600,000£30,000£60,000£90,000

A larger deposit generally means you need to borrow less and can give you access to a wider range of mortgage deals.

MoneyHelper states that first-time buyers will usually need a deposit of around 5% or 10%, while larger deposits can provide access to more deals and potentially lower rates.

Understanding Loan-to-Value

Mortgage lenders use Loan-to-Value (LTV) to describe the relationship between the amount you borrow and the property’s value.

If you purchase a £500,000 property with a £50,000 deposit:

  • Deposit = £50,000
  • Mortgage = £450,000
  • LTV = 90%

If you increase your deposit to £100,000:

  • Deposit = £100,000
  • Mortgage = £400,000
  • LTV = 80%

A lower LTV can improve the mortgage deals available to you because the lender is taking less relative risk.

However, saving for a larger deposit is not always the best decision if it leaves you without sufficient cash for fees, moving costs and an emergency fund.

How Much Can a First-Time Buyer Borrow?

There is no universal mortgage amount that every first-time buyer can borrow.

The amount a lender is prepared to offer depends on your individual financial circumstances and the lender’s affordability assessment.

Income is important, but it is not the entire calculation.

A lender may consider:

  • Your salary or other regular income
  • Employment status
  • Existing loans and credit commitments
  • Credit card balances
  • Childcare costs
  • Regular household expenditure
  • Other financial commitments
  • Deposit size
  • Credit history
  • The property’s value and suitability
  • The mortgage term
  • Your overall financial circumstances

MoneyHelper recommends working out what you can realistically afford before beginning your property search and notes that lenders assess affordability rather than simply providing a guaranteed borrowing amount based on salary alone.

Don’t Build Your Budget Around the Maximum

Suppose a lender indicates that you could potentially borrow £450,000.

That does not necessarily mean you should buy the most expensive property available to you.

Your mortgage repayment is likely to be one of your largest monthly commitments.

You still need to pay for:

  • Council tax
  • Utilities
  • Food
  • Insurance
  • Transport
  • Maintenance
  • Service charges if applicable
  • Ground rent where applicable
  • Other household expenses

You should also consider what would happen if your circumstances changed.

A mortgage that is technically affordable today may become uncomfortable if your income falls or your expenses increase.

The FCA is currently proposing mortgage-rule changes aimed at helping lenders take a more rounded view of consumers’ circumstances while maintaining consumer protections. This highlights the importance of assessing the individual borrower’s circumstances rather than relying on a simplistic income calculation.

How Lenders Assess Your Mortgage Affordability

Mortgage affordability is one of the most important parts of the application.

The lender wants to establish whether you can reasonably maintain the mortgage repayments.

This means your bank statements, income evidence and financial commitments can all become relevant.

A lender may examine your regular spending patterns and outstanding commitments alongside your income.

Your Income

For an employed applicant, this may include:

  • Basic salary
  • Certain regular bonuses
  • Overtime where acceptable under the lender’s criteria
  • Commission
  • Other qualifying income

Different lenders have different approaches to additional income.

This is one reason why two lenders can assess the same applicant differently.

Your Existing Debts

Existing borrowing can reduce your mortgage affordability.

For example, you might earn a strong salary but also have:

  • A car finance agreement
  • Personal loans
  • Credit card balances
  • Student loan deductions
  • Other regular financial commitments

The lender needs to consider the impact of these commitments on your disposable income.

Your Monthly Spending

Affordability isn’t simply about how much you earn.

It is also about how much you spend.

This is why preparing your finances before applying can make the process significantly easier.

Review your regular expenditure and identify unnecessary commitments well before you apply.

Don’t attempt to disguise normal spending or manipulate your bank statements. Instead, understand your actual financial position and obtain advice on which lenders may be appropriate for your circumstances.

Why Your Credit History Matters

Your credit history can influence how lenders assess your mortgage application.

Before applying, it is sensible to check your credit reports and make sure the information held about you is accurate.

Look for:

  • Missed payments
  • Defaults
  • County Court Judgments
  • Incorrect addresses
  • Financial associations
  • Outstanding accounts
  • Errors or outdated information

A weaker credit history does not automatically mean you cannot obtain a mortgage.

However, it can affect the lenders and products available to you.

This is particularly important if you have had financial difficulties in the past.

Don’t make multiple mortgage applications simply hoping that one lender will accept you.

A better approach is to understand your circumstances first and identify suitable lenders before submitting a full application.

Getting a Mortgage in Principle Before Buying

A Mortgage in Principle (MIP), also called an Agreement in Principle (AIP) or Decision in Principle (DIP), gives you an indication of how much a lender may be prepared to lend.

It is not a formal mortgage offer.

MoneyHelper explains that a mortgage in principle can provide a realistic indication of your potential borrowing and may be useful when competing for a property. It is commonly valid for around 30 to 90 days, depending on the provider.

Why First-Time Buyers Should Consider an MIP

Imagine finding your ideal London flat before understanding your borrowing position.

You make an offer.

The estate agent asks how you’re funding the purchase.

You then discover that the mortgage you expected to obtain isn’t available at the required level.

That can put you in a weak negotiating position.

Obtaining an MIP first helps you understand your approximate budget before you become emotionally attached to a property.

It can also demonstrate to an estate agent that you have taken steps towards arranging finance.

An MIP isn’t a guarantee that your mortgage application will ultimately be approved. The lender will still need to assess the property, your documentation and your full application.

For a deeper explanation, see our guide to how to get a mortgage in principle in the UK.

Documents You Need for a First-Time Buyer Mortgage

Preparation can make a significant difference to the speed and smoothness of your mortgage application.

Typical documentation may include:

  • Proof of identity
  • Proof of address
  • Recent payslips
  • P60
  • Bank statements
  • Evidence of your deposit
  • Details of existing borrowing
  • Details of regular expenditure
  • Employment information
  • Tax returns and accounts if self-employed

The exact requirements vary between lenders.

MoneyHelper notes that mortgage applicants need to provide evidence of income, debts and spending, while self-employed applicants may need tax returns and business accounts covering previous years.

If Your Deposit Comes From a Gift

Gifted deposits can be acceptable to some lenders, but the source of the funds and the relationship with the person providing the gift will need to be documented.

The lender and solicitor may require a gifted-deposit declaration confirming that the money is genuinely a gift and that the person providing it has no ownership interest in the property.

Do not transfer large sums of unexplained money into your account shortly before applying without understanding how the lender and solicitor will need to evidence its source.

Choosing the Right Mortgage for Your First London Home

Once you know your approximate budget, you need to consider the type of mortgage that fits your circumstances.

For most first-time buyers, the choice will include different combinations of:

  • Fixed-rate mortgages
  • Tracker mortgages
  • Variable-rate mortgages
  • Repayment mortgages
  • Different mortgage terms
  • Different LTV bands
  • Different fee structures

Fixed-Rate Mortgage

A fixed-rate mortgage keeps your interest rate fixed for an agreed period.

The advantage is predictability.

You know what your mortgage interest rate will be during the fixed period, making monthly budgeting easier.

The disadvantage is that you may not benefit immediately if mortgage rates fall.

Tracker or Variable-Rate Mortgage

A tracker mortgage generally follows a reference rate, meaning your monthly payments can change when that rate changes.

This can work well in certain circumstances but introduces greater payment uncertainty.

Repayment Mortgage

With a repayment mortgage, your monthly payments are designed to pay both interest and part of the capital.

Provided you maintain the agreed payments for the full term, the mortgage should eventually be repaid.

Choosing the Mortgage Term

A longer mortgage term can reduce your monthly payments because the borrowing is spread over more years.

However, it can increase the total interest paid over the life of the mortgage.

MoneyHelper reported in June 2026 that the average mortgage term for first-time buyers had reached 31 years, with some buyers choosing terms of up to 40 years to reduce monthly repayments.

The cheapest monthly payment is therefore not necessarily the cheapest mortgage overall.

You need to consider both:

Monthly affordability + total cost of borrowing

The True Cost of Buying Your First Home in London

Your deposit is only one part of the money you need.

A first-time buyer should create a complete purchase budget before making an offer.

Potential costs include:

Mortgage Costs

Depending on the product, you may encounter:

  • Product fees
  • Booking fees
  • Valuation fees
  • Broker fees
  • Other lender charges

Some mortgages include incentives such as a free valuation or contribution towards legal costs, but you should compare the overall cost rather than choosing a product purely because it has a particular incentive.

Legal Fees

You will normally need a solicitor or licensed conveyancer to handle the legal work involved in buying the property.

The cost can vary depending on the property and complexity of the transaction.

Survey Costs

A lender’s valuation is not the same thing as a full structural survey.

The lender’s valuation is primarily designed to establish whether the property provides suitable security for the mortgage.

You may want an independent survey to identify potential defects before committing to the purchase.

Stamp Duty

First-time buyer Stamp Duty rules depend on the property price and the current tax rules applying in England and Northern Ireland.

As of the current guidance, first-time buyers in England and Northern Ireland can benefit from first-time buyer Stamp Duty relief subject to the relevant property-value and eligibility conditions. MoneyHelper currently states that first-time buyers pay no Stamp Duty on properties below £300,000 where the purchase price is below the relevant £500,000 threshold.

Because tax rules can change, check the current GOV.UK position before completing your purchase.

Moving and Property Costs

Don’t forget:

  • Removal costs
  • Furniture
  • Appliances
  • Buildings and/or contents insurance
  • Repairs
  • Decorating
  • Service charges
  • Ground rent where applicable
  • Council tax

A buyer who uses every penny of their savings for the deposit can find themselves financially stretched immediately after receiving the keys.

First-Time Buyer Schemes and Low-Deposit Options

There are several initiatives that may help eligible buyers, although eligibility and availability vary.

The Mortgage Guarantee Scheme

The UK Government introduced a permanent Mortgage Guarantee Scheme in July 2025.

The scheme supports the availability of 91% to 95% LTV mortgages through participating lenders, meaning eligible buyers may be able to purchase with a deposit as small as 5%. The scheme applies across the UK and has specific eligibility and property requirements.

A 5% deposit can therefore make home ownership possible sooner.

However, a low deposit also means a larger mortgage and typically a higher LTV.

That means you should consider the affordability and long-term cost rather than simply asking whether you can access a 95% mortgage.

First Homes Scheme

The First Homes scheme can allow eligible buyers in England to purchase certain properties at a discount of between 30% and 50% compared with market value.

The scheme has specific eligibility conditions, including income limits and mortgage requirements. The income ceiling is higher for properties in London.

Not every property is available through the scheme, so it should be considered as one possible route rather than something every first-time buyer can automatically use.

Lifetime ISA

A Lifetime ISA can also be relevant for eligible first-time buyers saving towards a property.

If you’re considering using one, check the current rules, withdrawal conditions and property-price limits before relying on it as part of your purchase strategy.

The First-Time Buyer Mortgage Process

The mortgage journey becomes considerably easier when you understand the sequence.

Step 1: Establish Your Budget

Start with your income, savings, expenditure and financial commitments.

Don’t begin with the most expensive property you can imagine buying.

Begin with what is realistically affordable.

Step 2: Build Your Deposit

Work out how much cash you have available and whether additional funds will come from a Lifetime ISA, gifted deposit or another legitimate source.

Remember that you need money for more than the deposit.

Step 3: Review Your Credit Position

Check your credit reports and address inaccuracies before applying.

If you have previous credit problems, obtain specialist advice before submitting applications.

Step 4: Obtain a Mortgage in Principle

Speak with a lender or mortgage broker and establish your approximate borrowing capacity.

This gives you a more realistic property-search budget.

Step 5: Find a Suitable Property

Once your budget is established, start viewing properties within a sensible price range.

Don’t assume that the MIP amount is your recommended spending limit.

Step 6: Make an Offer

Once your offer is accepted, your MIP needs to progress into a full mortgage application.

Step 7: Submit the Full Mortgage Application

The lender will assess your income, expenditure, deposit, credit history and the property.

A valuation may also be carried out.

MoneyHelper states that a full mortgage application can take weeks and that the lender may arrange a valuation as part of the process.

Step 8: Receive Your Mortgage Offer

If the lender is satisfied with the application and property, you receive the formal mortgage offer.

This is different from a mortgage in principle.

Step 9: Exchange Contracts

Your solicitor handles the legal process leading towards exchange.

Once contracts are exchanged, you are legally committed to the purchase.

Step 10: Complete and Get the Keys

On completion, the purchase funds are transferred and ownership passes to you.

The process from initial preparation through to completion can take time, which is why starting your mortgage preparation early is so important.

For the wider process, see our guide to how long a mortgage takes in the UK.

How a London Mortgage Broker Can Help

Choosing a mortgage is not simply about finding the lowest rate advertised online.

The mortgage with the lowest headline rate may not necessarily be the most suitable product for your circumstances.

A mortgage broker can assess your situation and help identify lenders whose criteria are more closely aligned with your needs.

This can be particularly useful if you:

  • Have a small deposit
  • Are self-employed
  • Have variable income
  • Have previous credit issues
  • Have complex income
  • Are buying a non-standard property
  • Need help understanding your borrowing capacity
  • Want to compare a wider range of mortgage options

MoneyHelper confirms that buyers can apply directly to a bank or building society or use a regulated mortgage adviser or broker, with advice potentially being particularly useful for buyers with smaller deposits or more complex circumstances.

The Value of Specialist Mortgage Advice

A specialist broker should not simply tell you how much you can borrow.

The objective should be to help you understand:

What you can borrow → what you can afford → which lenders fit → which mortgage is appropriate → how to complete the purchase

That distinction matters.

The biggest mortgage you can obtain is not automatically the best mortgage for you.

Your Next Steps

If you’re preparing to buy your first home in London, don’t wait until you’ve found the property before thinking about finance.

A stronger approach is:

  1. Calculate your available deposit.
  2. Review your monthly income and expenditure.
  3. Check your credit position.
  4. Understand your realistic borrowing range.
  5. Obtain a mortgage in principle.
  6. Set a property budget that leaves room for additional buying costs.
  7. Start viewing properties within that budget.
  8. Speak to your mortgage adviser as soon as you find a property you want to buy.

The objective isn’t simply to get a mortgage.

It is to secure a mortgage that is appropriate for your circumstances and sustainable over the long term.

If you’re unsure where to start, speak to a London mortgage broker before making an offer. A review of your income, deposit, credit position and intended purchase can help you understand your options before you commit to a property.

First-Time Buyer Mortgage in London: The Bottom Line

Buying your first home in London requires more preparation than simply saving a deposit and applying to your bank.

You need to understand your affordability, mortgage options, deposit requirements, additional purchase costs and the lender criteria that apply to your circumstances.

A 5% deposit may open the door to home ownership, but the right mortgage decision goes much further than the size of your deposit.

Your objective should be to enter the property market with a realistic budget, appropriate financing and enough financial resilience to manage your mortgage after completion.

Getting a mortgage in principle before you begin seriously viewing properties can provide a useful starting point, while specialist mortgage advice can help you understand which lenders and products may fit your circumstances.

For London first-time buyers, preparation is not just helpful.

It can be the difference between finding a property you love and actually being in a position to buy it.

Frequently Asked Questions

Can I get a first-time buyer mortgage with a 5% deposit?

Yes, some mortgage products allow eligible buyers to purchase with a deposit of 5%. The UK Government’s permanent Mortgage Guarantee Scheme supports the availability of 91% to 95% LTV mortgages through participating lenders.

However, a 5% deposit means you will normally need to borrow a larger percentage of the property’s value. This can affect the mortgage rates available and your monthly repayments.

How much deposit do I need to buy my first home in London?

Many mortgages require a deposit of at least 5% of the purchase price, although requirements vary by lender and product.

A larger deposit can reduce your LTV and potentially give you access to a wider range of mortgage deals.

How much can I borrow as a first-time buyer in London?

There is no single amount that applies to every buyer.

Lenders consider factors including income, expenditure, existing debts, credit history, deposit and the mortgage product being considered.

A mortgage broker can help you establish which lenders may consider your circumstances.

Do I need a mortgage in principle before viewing a property?

Not necessarily.

However, having one can be useful because it gives you an indication of your potential borrowing capacity and can demonstrate to an estate agent that you have taken steps towards arranging finance.

It is not a formal mortgage offer or guarantee of approval.

Does getting a mortgage in principle affect my credit score?

It depends on how the lender conducts its credit check.

Some lenders use a soft search while others may use a hard credit search. MoneyHelper recommends checking how the lender will conduct the search if you’re concerned about the impact on your credit file.

Can I get a mortgage as a first-time buyer if I am self-employed?

Yes, self-employed applicants can obtain mortgages, although lenders may require additional evidence of income.

This can include tax calculations, tax year overviews and business accounts. Requirements vary between lenders.

If you are self-employed, see our guide to self-employed mortgages in London.

Can I get a first-time buyer mortgage with bad credit?

Potentially.

Bad credit does not automatically mean that every lender will reject you. However, your credit history can affect which lenders are willing to consider your application and the terms available.

If you have previous credit problems, it can be beneficial to speak to a broker before making a full application.

Read our guide to bad credit mortgages in London for more information.

Do first-time buyers pay Stamp Duty in London?

First-time buyer Stamp Duty relief may be available in England and Northern Ireland if you meet the relevant eligibility and property-price conditions.

The rules and thresholds can change, so you should check the current position before completing your purchase.

Is a longer mortgage term better for a first-time buyer?

Not necessarily.

A longer term can reduce your monthly repayments, which may make a mortgage more affordable on a monthly basis. However, you may pay more interest over the full term.

The appropriate term depends on your income, age, affordability and long-term financial objectives. MoneyHelper notes that longer terms have become increasingly common among first-time buyers.

Should I use a mortgage broker as a first-time buyer?

A mortgage broker can be particularly useful if you’re unsure which lenders may accept your circumstances, have a small deposit, are self-employed, have complex income or have previous credit problems.

You can apply directly to lenders or use a regulated mortgage adviser. The right choice depends on your circumstances and how much support you need.

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