First-time buyers: how to reduce the interest you pay on your mortgage

Why reducing mortgage interest matters for first-time buyers

For many first-time buyers, the mortgage is the biggest financial commitment they’ll ever make. Even a small difference in the interest rate can affect how much you pay each month—and the total interest you pay over the full term.

The interest cost is influenced by factors such as how lenders assess your application, the size of your deposit (loan-to-value), the type of mortgage you choose, and the length of time you repay. The good news is that there are steps you can take before and after you apply that may help reduce the interest you pay.

1. Improve your credit profile before you apply

Lenders use credit information to help decide how much risk they think you present. A stronger credit profile can support better pricing.

Consider:

• Check your credit report and correct any errors or outdated information.
• Address missed payments or other adverse markers where possible.
• Keep existing credit commitments manageable and avoid taking on new borrowing right before applying.
• Make sure your details are consistent (name, address history, and electoral roll status where relevant).

A useful approach is to give yourself time—rather than leaving improvements until the last minute.

2. Increase your deposit to reduce loan-to-value (LTV)

Your loan-to-value (LTV) ratio compares the mortgage amount to the property value. In many cases, a lower LTV can help you access more competitive interest rates.

Practical ways to improve your position include:

• Saving for a larger deposit where you can.
• Avoiding unnecessary increases in the loan amount (for example, by keeping purchase costs and fees in mind).
• Considering the impact of deposit size on the overall cost—not just the monthly payment.

If you’re weighing up whether to buy now or wait a little longer, it can help to compare the potential savings from a better LTV against the cost of waiting.

3. Compare more than just the most obvious lenders

Mortgage pricing can vary between lenders and products. While high-street options are a starting point, there are often additional deals available through a wider range of lenders.

To make comparison more effective:

• Focus on the product features, not only the headline rate.
• Check the overall cost for the period you’re likely to keep the mortgage.
• Consider whether the mortgage fits your circumstances, such as whether you expect to move, change income, or make overpayments.

A structured comparison can reduce the risk of choosing a deal that looks attractive initially but costs more over time.

4. Choose a mortgage term that balances affordability and total interest

The mortgage term affects how quickly you repay the balance. Longer terms generally reduce monthly payments, but they can increase the total interest paid.

When thinking about term length:

• Shorter terms can reduce the overall interest cost, but monthly payments may be higher.
• Longer terms may be easier to manage monthly, but can increase total interest.

A helpful way to decide is to consider what you can realistically afford now and how your budget might change over the next few years.

5. Overpay where your mortgage allows (and where it makes sense)

Overpayments can reduce the outstanding balance, which can reduce the interest charged in future months.

Key points to consider:

• Check your mortgage terms for any limits on overpayments and whether they are subject to fees.
• Look at flexibility—some mortgages allow regular overpayments, while others have restrictions.
• Consider your cashflow: overpaying can be beneficial, but it’s important not to stretch your finances.

Even modest, consistent overpayments can make a meaningful difference over time.

6. Consider whether a fixed rate suits your plans

Fixed-rate mortgages set your interest rate for a defined period (commonly 2, 3, 5 or 10 years). Fixing can help with budgeting by reducing uncertainty about future payments.

When evaluating a fixed rate:

• Match the fix period to your likely timeframe in the property.
• Compare the cost of the fixed period with what you might pay after it ends.
• Be aware of what happens at the end of the deal, including potential changes to your interest rate.

If you expect to move, remortgage, or make significant changes soon, the length of the fixed period may be especially important.

7. Avoid drifting onto a higher rate after your deal ends

When a mortgage deal ends, many borrowers move onto a lender’s standard variable rate (SVR) or another default option unless they take action to switch.

To reduce the risk of paying more than necessary:

• Plan ahead for your mortgage end date.
• Review alternatives before the current deal finishes.
• Consider how you’ll manage affordability if rates change.

Defaulting to a higher rate by inaction can increase the interest you pay compared with switching to a new product.

Putting it all together: a checklist for first-time buyers

If you want to reduce the interest you pay, the most effective strategy is usually a combination of steps:

• Strengthen your credit profile before applying.
• Aim for a deposit that improves your LTV.
• Compare mortgages across a range of lenders and products.
• Choose a term length that fits both affordability and long-term cost.
• Use overpayments if your mortgage allows and your budget can support it.
• Select a fixed period that matches your plans.
• Avoid defaulting onto a higher rate when your deal ends.

Final thoughts

Reducing mortgage interest isn’t about finding a single “magic” lever. It’s usually the result of decisions made at different stages—before you apply, when you choose the mortgage, and as your deal approaches its end.

For first-time buyers, taking a careful, informed approach can help you manage repayments now while also reducing the total interest cost over the life of the mortgage.