Key Takeaway

A fixed-rate mortgage locks your interest rate for a set period (typically two, three, five, or ten years), protecting you from rate rises and keeping your monthly repayments predictable. To find the best deal, compare the APRC (which includes fees), check your loan-to-value ratio, understand early repayment charges, and shop around using comparison tools or an FCA-authorised mortgage broker. Rates, product fees, and eligibility vary by lender and your circumstances, so verify current terms before applying.

Introduction

Fixed-rate mortgage deals are among the most popular choices for UK homebuyers and remortgagers because they offer certainty. When you fix your rate, your monthly repayments stay the same for the duration of your deal period, regardless of what happens to the Bank of England base rate or lender standard variable rates (SVR).

Choosing the right fixed-rate deal involves more than just picking the lowest headline rate. You need to consider the deal period length, product fees, early repayment charges, and what happens when your fixed term ends. This guide walks you through every step of finding and securing the best fixed-rate mortgage deal for your situation.

What You Will Learn

This guide covers how to understand fixed-rate mortgage products, calculate your budget and loan-to-value ratio, compare deals using APRC, check fees and early repayment charges, and submit a strong application. You will also learn common mistakes to avoid and answers to frequently asked questions about fixed-rate mortgages in the UK.

Step 1: Understand How Fixed-Rate Mortgages Work

A fixed-rate mortgage charges the same interest rate for a defined initial period (the deal period), which typically runs for two, three, five, or ten years. During this time, your monthly repayments remain constant. Once the fixed term ends, your mortgage reverts to the lender’s standard variable rate (SVR), which is almost always higher and can change at any time.

According to MoneyHelper, borrowers should plan ahead for the end of their deal period and consider switching to a new fixed-rate product before reverting to the SVR (MoneyHelper, 2026). Most borrowers remortgage three to six months before their current deal expires to avoid paying the higher reversion rate.

Fixed-rate mortgages can be arranged on a repayment basis (where you pay off capital and interest each month) or interest-only (where you pay only interest and repay the capital at the end of the mortgage term). Repayment mortgages are more common and reduce your outstanding balance over time.

Step 2: Determine Your Budget and Loan-to-Value Ratio

Before comparing deals, work out how much you can afford to borrow and your loan-to-value (LTV) ratio. LTV is the size of your mortgage as a percentage of the property value. For example, if you are buying a property worth £300,000 with a £30,000 deposit, your mortgage is £270,000 and your LTV is 90 per cent.

Lower LTV ratios unlock better interest rates. A borrower with a 10 per cent deposit (90 per cent LTV) will typically pay a higher rate than someone with a 25 per cent deposit (75 per cent LTV). Use a mortgage affordability calculator to estimate your maximum borrowing based on your income, outgoings, and deposit.

Lenders assess affordability using strict criteria set by the Financial Conduct Authority. They will stress-test your ability to afford repayments if interest rates rise, even though your rate is fixed. Gather evidence of your income (payslips, tax returns, or accounts if you are self-employed) and keep your credit file clean before applying.

Step 3: Compare Fixed-Rate Deals Using APRC

Once you know your budget and LTV, start comparing fixed-rate deals. Do not focus solely on the headline interest rate. The Annual Percentage Rate of Charge (APRC) gives a more complete picture because it includes the interest rate, product fees, and other compulsory charges over the mortgage term.

A deal with a low rate but a £1,500 product fee might cost more overall than a slightly higher rate with no fee, especially if you are borrowing a smaller amount or planning to remortgage after the fixed period ends. Use comparison websites and tools recommended by MoneyHelper to compare deals side by side (MoneyHelper, 2026).

Consider the length of the fixed term. A two-year fix offers flexibility but means you will need to remortgage sooner, potentially incurring new fees. A five-year or ten-year fix provides longer-term certainty and may be cheaper overall if rates rise, but you are locked in for longer and early repayment charges (ERCs) apply if you want to leave early.

Step 4: Check Fees and Early Repayment Charges

Every fixed-rate mortgage comes with fees. The main ones include the product or arrangement fee (which can range from nothing to £2,000 or more), the valuation fee, and legal fees. Some lenders let you add the product fee to the mortgage, but this means you pay interest on it over the full term.

Early repayment charges (ERCs) apply if you repay your mortgage or overpay beyond the lender’s allowance during the fixed term. Typical ERCs are a percentage of the outstanding balance (for example, 5 per cent in year one, 4 per cent in year two, declining to zero by the end of the deal). Check your lender’s overpayment allowance, often 10 per cent of the balance per year without penalty.

Factor in exit fees (also called deeds release fees) and potential costs if you port your mortgage to a new property. Understand the total cost of the deal, not just the monthly repayment, before committing.

Step 5: Apply for Your Fixed-Rate Mortgage

Start with an agreement in principle (AIP), also called a decision in principle. An AIP is a conditional offer from a lender stating how much they are willing to lend you, subject to a full application and valuation. It typically involves a soft credit check and helps you demonstrate to estate agents that you are a serious buyer.

Read also: Fixed-Rate vs. Tracker Mortgages in the UK: Which Is Right for You?

Once you have found a property or decided to remortgage, submit a full mortgage application. The lender will conduct a hard credit check, verify your income and outgoings, and arrange a property valuation. If you are remortgaging, you may not need a new valuation if you stay with your current lender (a product transfer).

Consider using an FCA-authorised mortgage broker. Brokers have access to deals not always advertised directly to consumers and can match you to lenders based on your circumstances. Some brokers charge a fee, while others are paid by the lender. Confirm costs upfront.

Practical Tips for Finding the Best Fixed-Rate Deal

Start your search three to six months before your current deal ends to give yourself time to compare and apply without pressure. Check whole-of-market comparison tools or consult a mortgage broker to see a wider range of products than any single lender offers.

Improve your LTV if possible by saving a larger deposit or paying down your existing mortgage. Even a small improvement (for example, moving from 85 per cent to 80 per cent LTV) can unlock significantly better rates.

Read the Key Facts Illustration (KFI) carefully. This document, required by the FCA, sets out the total cost of the mortgage, monthly repayments, fees, and what happens when the fixed term ends.

Common Mistakes to Avoid

Do not wait until your fixed term expires before shopping around. If you revert to the SVR, your monthly repayments can jump by hundreds of pounds. Start remortgaging early.

Avoid choosing a deal based solely on the lowest headline rate. A low rate with high fees can cost more overall than a slightly higher rate with lower fees, especially over a short deal period.

Do not ignore early repayment charges. If there is any chance you might move house, repay a lump sum, or remortgage early, choose a product with lower ERCs or a generous overpayment allowance. Missing this detail can lock you into an unsuitable deal.

Frequently Asked Questions

What is the difference between a two-year and a five-year fixed-rate mortgage?
A two-year fix offers a lower initial rate and more flexibility to remortgage sooner, but you will face remortgaging costs and potential rate rises when the deal ends. A five-year fix provides longer certainty and can be cheaper overall if rates rise, but you are locked in for longer and ERCs apply if you leave early.

Can I overpay on a fixed-rate mortgage?
Most lenders allow you to overpay up to 10 per cent of the outstanding balance per year without an early repayment charge. Overpaying reduces your balance and the total interest you pay, and can improve your LTV for future remortgaging. Check your lender’s specific terms.

What happens when my fixed-rate deal ends?
Your mortgage automatically reverts to your lender’s standard variable rate (SVR), which is typically much higher than your fixed rate. To avoid this, arrange a new fixed-rate deal (either with your current lender or by remortgaging to a new one) three to six months before your current deal expires.

Conclusion

Finding the best fixed-rate mortgage deal in the UK requires careful comparison of rates, fees, deal periods, and early repayment charges. Start by understanding your budget and LTV, then use APRC to compare the true cost of each product. Check the terms carefully, read the Key Facts Illustration, and consider consulting an FCA-authorised mortgage broker for personalised guidance.

Begin your search three to six months before you need the mortgage or before your current deal ends. Compare whole-of-market options, factor in all fees, and choose a deal that matches your financial situation and plans for the property. Taking these steps will help you secure a competitive fixed-rate mortgage and avoid costly mistakes.

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

This information is general educational guidance and not regulated mortgage advice. Refisage is not authorised by the Financial Conduct Authority. Mortgage rates, fees, product availability, and eligibility criteria vary by lender, product, and your personal circumstances. Speak to an FCA-authorised mortgage adviser to discuss your specific situation before making any mortgage decision.