Buying Your First Home: First-Time Buyer Mortgage Guide (UK)

Buying your first home is a major step—exciting, but it can also feel like there’s a lot to learn at once. Between deposits, mortgage terms, and the cost of buying a property, it’s easy to get overwhelmed.

This guide is designed to help first-time buyers understand the key mortgage concepts that matter most before you apply.

Important: This is general information and not regulated financial advice.

1) Start with the deposit: it’s more than just a number

Your deposit is the part of the purchase price you pay upfront. It’s one of the biggest factors lenders consider because it affects the loan-to-value (LTV) ratio.

• Higher deposit → lower LTV
• Lower LTV can make it easier to find suitable mortgage options
• It may also influence the overall cost of borrowing

Even if you’re focused on the monthly payment, the deposit is still central to what you can borrow.

What else should you plan for alongside the deposit?

Many first-time buyers also need funds for:

• Legal fees
• Valuation and survey costs
• Moving costs
• Buildings and contents insurance
• Stamp Duty Land Tax (SDLT) (depending on the property price and your circumstances)

2) Understand how mortgages work (and the main types)

A mortgage is a loan secured against the property. You repay it over an agreed term—commonly 25 to 30 years, though terms vary.

Repayment mortgages

With a repayment mortgage, your monthly payment covers:

• the interest on the loan, and
• a portion of the loan balance

Over time, the balance reduces until the mortgage is paid off.

Interest-only mortgages

With an interest-only mortgage, your monthly payment typically covers only the interest. The original loan amount is expected to be repaid later (for example, from savings or an investment plan).

Interest-only can be suitable in specific circumstances, but it requires a clear repayment strategy.

3) Get clear on affordability before you fall in love with a property

Before you start viewing, it helps to understand what you can realistically afford—not just what you might be offered.

Mortgage affordability usually considers more than income. Lenders typically look at:

• your income and employment type
• your existing financial commitments
• your outgoings
• your credit history
• the size of the deposit and property value

Don’t forget the “hidden” costs of buying

A mortgage payment is only one part of the monthly picture. Costs can include:

• utilities and council tax
• insurance
• maintenance and service charges (particularly for flats)
• travel and day-to-day living changes after moving

4) Consider first-time buyer support schemes (where relevant)

Depending on your situation and where you’re buying, there may be government-backed or other support options available. Common examples include:

• Lifetime ISA (LISA): designed to help people save toward their first home deposit
• Shared Ownership: you buy a share of the property and pay rent on the remainder
• First Homes Scheme: offers discounted homes in certain areas for eligible buyers

Each scheme has its own rules, limits, and eligibility requirements. It’s worth understanding how they work early, especially if you’re planning your deposit.

5) Freehold vs leasehold: know what you’re buying

Property tenure affects ownership and can influence ongoing costs.

Freehold

With a freehold, you generally own the property and the land it sits on.

Leasehold

With leasehold, you own the right to live in the property for a set period (often 99+ years for many flats). You may have to pay:

• ground rent
• service charges

Leasehold properties can involve additional ongoing costs and rules, so it’s important to review the details carefully before committing.

6) Choose the mortgage structure that fits your plan

First-time buyers often focus on the interest rate, but the structure of the mortgage deal can matter just as much.

Fixed vs variable periods

Many mortgages include an initial period where the interest rate is fixed, after which it may move to a variable rate.

A key question to ask is:

• How long do you want payment certainty?

Deal term and total term

• Deal term: how long the initial product rate applies
• Mortgage term: the overall length of the mortgage

A longer term can reduce monthly payments, but may increase total interest over the life of the mortgage.

7) Prepare for the application process (what lenders typically review)

While each lender’s process differs, mortgage applications generally involve checks on:

• your identity and address history
• your income and employment details
• your deposit source
• your credit history
• your existing debts and monthly commitments
• the property details (including valuation)

Having your documents and financial information organised can help reduce delays.

8) Thinking ahead: what happens after the initial deal ends?

Many first-time buyers take out a mortgage with a fixed period. It’s useful to plan for what comes next:

• rates can change when the deal ends
• you may remortgage to a new product
• your monthly payment could increase or decrease depending on market rates and your circumstances

Understanding this “next step” helps you avoid surprises.

9) A simple way to sanity-check your plan

Before you commit, it can help to review your plan against a few practical questions:

• Do I have enough deposit and additional funds for buying costs?
• Have I included realistic monthly outgoings beyond the mortgage?
• Have I considered tenure costs (especially for leasehold properties)?
• Do I understand repayment vs interest-only and how I’d repay the loan?
• If I’m using a scheme, do I understand the rules and limits?

Stamp Duty and budgeting

Stamp Duty Land Tax (SDLT) can be a significant part of the purchase cost. The amount depends on factors such as the property price and whether you’re a first-time buyer.

Using an official calculator can help you estimate SDLT and plan your cash requirements more accurately.

Useful official guidance:

• https://www.gov.uk/stamp-duty-land-tax

Mortgage calculators: useful for planning, not guessing

Mortgage calculators can help you model scenarios such as:

• how different loan amounts affect monthly payments
• how term length changes affordability
• how deposit size and LTV might influence your borrowing

They’re best used as planning tools alongside a clear understanding of your overall budget.

Final thoughts for first-time buyers

A first mortgage is a long-term commitment, but it doesn’t have to be confusing. By focusing on deposit planning, affordability, mortgage type, and property tenure, you can approach the process with more confidence.

If you’re unsure about any part of the journey, it’s often helpful to review your options carefully and make sure the mortgage structure matches your repayment plan.