Fixed-rate mortgage for first-time buyers: how it works

Fixed-rate mortgage for first-time buyers: what it is and how it works

A fixed-rate mortgage can be a practical choice for first-time buyers who want repayment certainty while they get used to the commitments of homeownership. Instead of your interest rate moving up and down, your mortgage rate is set for a defined period, which helps you plan your monthly budget.

This guide explains what fixed-rate mortgages are, how lenders assess affordability, what deposit and loan-to-value (LTV) can affect, and which alternatives may suit different circumstances.

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

What is a fixed-rate mortgage?

A fixed-rate mortgage is one where the interest rate is fixed for a set term. Common fixed periods include 2, 5, or 10 years (the exact options vary by lender).

During the fixed period:

• Your monthly payment is usually predictable (subject to any changes in other charges such as insurance, and any product-specific features).
• You are protected from interest rate rises for the length of the fix.
• You may still be able to make overpayments depending on the mortgage terms.

Once the fixed period ends, the mortgage will typically move onto a new rate (for example, another fixed deal, a variable rate, or the lender’s standard variable rate), unless you arrange a different option.

Fixed rate vs variable rate (why it matters)

The key difference is how the interest rate behaves:

• Fixed-rate: the rate stays the same for the agreed term.
• Variable-rate: the rate can change over time, often linked to a benchmark such as the Bank of England base rate or the lender’s own pricing.

For first-time buyers, the benefit of fixing is often budget stability, particularly if you’re stretching your finances to cover a new mortgage alongside other household costs.

What is a first-time buyer?

In mortgage terms, a first-time buyer generally means you have not previously owned a property and are buying your first home.

Lenders may also consider whether you have previously held a mortgage, and whether you’re buying alone or jointly. Shared ownership arrangements can also be treated differently depending on the structure.

Because definitions can vary, it’s worth checking how your lender or scheme categorises your situation.

How a fixed-rate mortgage works in practice

When you apply for a fixed-rate mortgage, the lender will typically:

1. Assess affordability

   • They look at your income and regular outgoings to understand what you can sustainably repay.
   • Outgoings can include household bills, existing debts, and other commitments.

2. Consider the deposit and LTV

   • The size of your deposit affects the LTV and can influence the interest rate and the range of products available.

3. Review credit history

   • Your credit report helps lenders understand how you’ve managed credit in the past.
   • A stronger credit profile can broaden options.

4. Apply the mortgage term

   • The length of the mortgage term affects the overall cost and monthly payments.

5. Set the fixed interest rate

   • The fixed period you choose (e.g., 2 vs 5 years) can affect the interest rate and therefore the monthly payment.

Deposit and LTV: what first-time buyers should know

Most first-time buyer mortgages require a deposit, and the LTV (loan-to-value) is used to measure how much of the property price you’re borrowing.

• Lower LTV (larger deposit) generally means less risk for the lender.
• Higher LTV (smaller deposit) can mean fewer options and higher rates.

Example of LTV

If a property costs £200,000:

• A £20,000 deposit is 10%, so you borrow £180,000.
  • LTV = £180,000 / £200,000 = 90%.
• A £40,000 deposit is 20%, so you borrow £160,000.
  • LTV = £160,000 / £200,000 = 80%.

Costs to expect beyond the interest rate

When comparing fixed-rate mortgages, it’s easy to focus only on the headline rate. However, the total cost can be affected by other features and fees, such as:

• Product fees (some deals include a fee; others are fee-free)
• Valuation/survey costs
• Arrangement and legal fees (often part of the wider buying process)
• Early repayment charges (ERCs) during the fixed period

Early repayment charges (ERCs)

If you repay the mortgage early or switch products during the fixed term, you may face ERCs. These charges can vary by lender and by how long remains on the fix.

Are there fixed-rate mortgages specifically for first-time buyers?

Many lenders offer fixed-rate products designed with first-time buyers in mind. These deals may reflect:

• the lender’s view of risk at different LTV levels
• affordability assumptions for typical first-time buyer profiles
• product availability for smaller deposits

Even when a deal is marketed for first-time buyers, eligibility still depends on the lender’s criteria and your individual circumstances.

90% and 95% LTV fixed-rate mortgages

For first-time buyers with smaller deposits, 90% and 95% LTV products are often a focus.

Key points to consider:

• They typically come with higher interest rates than lower LTV options.
• The range of deals may be narrower.
• You may need to consider whether the monthly payment comfortably fits your budget, especially if your income or outgoings are likely to change.

Alternatives to fixed-rate mortgages

A fixed rate isn’t the only way to structure your mortgage. Depending on your priorities, you may also see:

• Tracker mortgages: interest moves in line with a benchmark (often leading to payment changes).
• Discounted variable-rate mortgages: the rate is set below the lender’s standard variable rate for an initial period.
• Offset mortgages: savings are used to reduce the interest charged on the mortgage (subject to the specific product rules).
• Capped mortgages: the interest rate is capped above a certain level, though it may still vary.

The “best” option depends on whether you value certainty, flexibility, or the potential for payments to be lower if rates fall.

How long should you fix for? (2, 5, or 10 years)

Choosing a fixed term is often a trade-off:

• Shorter fixes (e.g., 2 years) can offer flexibility to remortgage sooner if rates become more favourable.
• Medium fixes (e.g., 5 years) can balance stability with the ability to review your options later.
• Longer fixes (e.g., 10 years) provide extended certainty, but the rate may be higher and product availability can be more limited.

For many first-time buyers, the decision comes down to how long you expect to stay in the property and how comfortable you are with potential changes in mortgage payments after the fixed period ends.

Government schemes and first-time buyer support (overview)

First-time buyers may also consider support schemes that can help with deposit requirements or affordability. Scheme availability and terms can change, so it’s important to verify current details.

Common examples include:

• Lifetime ISA (LISA): a government bonus on eligible savings used towards a first home.
• Help to Buy equity support (where applicable): designed to help buyers with deposits on certain new-build purchases.
• Shared ownership: you buy a share of the property and pay rent on the remainder, with the option to increase your share over time.

Using a mortgage broker when you’re a first-time buyer

Fixed-rate mortgages can look straightforward, but the comparison process often involves more than just the interest rate—especially when you’re factoring in LTV, fees, ERCs, and how affordability is assessed.

A broker can help you understand which fixed-rate options align with your deposit, income profile, and time horizon, and can assist with navigating lender requirements.

Key questions to consider before choosing a fixed-rate mortgage

• How long do you want repayment certainty for?
• What happens to your mortgage after the fixed term ends?
• Are you likely to move, remortgage, or make large overpayments during the fixed period?
• What are the fees and early repayment charges on the deal?
• Does the monthly payment comfortably fit your budget after other household costs?
• How does your deposit affect the LTV and the range of products available?

Summary

A fixed-rate mortgage can help first-time buyers manage the uncertainty of interest rate changes by locking in the rate for a set period. The most suitable option depends on your deposit (LTV), affordability, credit profile, and how long you expect to keep the mortgage.

By comparing fixed periods, understanding potential fees and early repayment charges, and considering alternatives, you can choose a structure that supports your long-term homeownership plans.