Remortgaging is one of the most important financial decisions you can make as a homeowner, yet many people stay on their existing deal for too long and pay thousands more than necessary. Knowing when to remortgage can save you considerable money, help you access better terms, or release equity for other purposes.

This guide will walk you through the key circumstances that make remortgaging worthwhile, the warning signs to watch for, and how to calculate whether switching makes financial sense for your situation. Whether your fixed rate is ending, interest rates have dropped, or your home has increased in value, understanding the right time to act is essential.

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

What You Will Learn

By the end of this guide, you will understand:

  • When your current mortgage deal is likely to become uncompetitive and cost you more than necessary
  • How to spot the financial triggers that make remortgaging worthwhile, including rate changes and improved loan-to-value ratios
  • The circumstances under which switching lenders or staying with your current one makes sense
  • How to calculate whether the costs of remortgaging outweigh the potential savings
  • Common mistakes that lead homeowners to miss opportunities or switch at the wrong time
  • Practical steps to take at different stages of your mortgage term

Step 1: Understand When Your Deal Period Ends

The single most important time to consider remortgaging is when your initial deal period is coming to an end. Most mortgages in the UK are structured with an initial period during which you receive a preferential rate, such as a fixed rate, tracker, or discount deal. This period typically lasts between two and five years, though some products run for longer.

When this initial period ends, you will automatically revert to your lender’s standard variable rate (SVR). The SVR is almost always significantly higher than the rate you were paying during your deal period. According to the Financial Conduct Authority, borrowers who fall onto the SVR can face rate increases of 2 percentage points or more, which can add hundreds of pounds to monthly payments.

You should begin exploring remortgage options around three to six months before your deal ends. Most lenders allow you to apply for a new deal up to six months in advance, and securing a rate early can protect you if rates rise before your current deal expires. Missing this window and staying on the SVR even for a few months can cost you considerably.

Check your mortgage documents or contact your lender to confirm your deal end date. Set a reminder well in advance so you have time to compare deals, gather documentation, and complete the remortgage process before you revert to the SVR.

Step 2: Compare Your Current Rate with Available Deals

Even if your deal period has not ended, it may make sense to remortgage if significantly better rates have become available. This is particularly relevant if you took out your mortgage when interest rates were higher, or if your circumstances have changed in a way that makes you eligible for better terms.

Start by identifying your current interest rate and remaining deal period. Then compare this with the rates currently available in the market for someone with your loan-to-value ratio, property value, and credit profile. You can use mortgage comparison tools or speak with a mortgage broker to get an accurate picture.

As of June 2026, rates change frequently in response to movements in the Bank of England base rate and broader economic conditions. A rate difference of 0.5 percentage points or more can translate into substantial savings over the remaining term of your mortgage. For example, on a £200,000 mortgage, a 0.5 per cent rate reduction could save you over £50 per month, or more than £600 per year.

However, you must factor in any early repayment charges (ERCs) that apply if you exit your current deal before the end of the initial period. ERCs are typically a percentage of the outstanding balance and can range from 1 per cent to 5 per cent depending on how much time remains. Calculate whether the interest savings from switching outweigh the ERC cost. If your ERC is £3,000 but you would save £1,200 per year on interest, it may take two and a half years to break even, which could make switching less attractive unless you plan to stay in the property long term.

Step 3: Calculate the Costs of Remortgaging

Remortgaging involves several costs beyond the interest rate itself. Understanding these costs is essential to determine whether switching makes financial sense.

Common costs include:

  • Product or arrangement fees: Many mortgage deals charge an upfront fee, which can range from nothing to £2,000 or more. Some lenders allow you to add this to the loan, but doing so increases your borrowing and the total interest paid.
  • Valuation fees: Your new lender will require a valuation of the property. Some lenders offer free valuations as part of their remortgage package, while others charge between £200 and £500 depending on the property value.
  • Legal fees: Remortgaging requires conveyancing work, though this is typically simpler and cheaper than a purchase. Many lenders offer free legal work for straightforward remortgages with the same lender or include it as part of a deal incentive. Expect to pay £300 to £500 if not covered.
  • Early repayment charges: As mentioned, these apply if you leave your current deal early and can be substantial.
  • Exit fees: Some lenders charge an administration or exit fee when you pay off your mortgage, typically ranging from £50 to £300.

Add up all these costs and compare them with your projected interest savings over a reasonable time horizon. According to MoneyHelper, it generally makes sense to remortgage if you can recover the switching costs within the first 12 to 24 months through lower interest payments.

Use an online remortgage calculator or work with a mortgage adviser to model different scenarios. Factor in not just the rate difference, but also how long you plan to stay on the new deal and whether you expect your financial circumstances to change.

Step 4: Check Your Loan-to-Value Ratio

Your loan-to-value (LTV) ratio is the size of your mortgage as a percentage of your property’s value. It is one of the most important factors in determining the interest rate you can access. A lower LTV generally qualifies you for better rates because you represent less risk to the lender.

If your property has increased in value since you took out your original mortgage, or if you have paid down a meaningful portion of the capital, your LTV will have improved. Moving from an 85 per cent LTV band to a 75 per cent or 60 per cent band can unlock significantly lower rates.

For example, if you bought a property for £250,000 with a £225,000 mortgage (90 per cent LTV), and the property is now worth £300,000 while your outstanding balance has fallen to £210,000, your LTV is now 70 per cent. This improvement can make remortgaging highly attractive because the rates available at 70 per cent LTV are typically much better than those at 90 per cent.

You can obtain a rough estimate of your property’s current value using online valuation tools, but lenders will conduct their own valuation. If your LTV has improved meaningfully, remortgaging is often worthwhile even if your current deal has not ended, provided the costs and any ERC can be justified by the interest savings.

Conversely, if your property value has fallen or remained flat, and your LTV has not improved, you may find that available rates are similar to your current deal, making a switch less compelling.

Step 5: Review Your Financial Circumstances

Changes in your personal financial situation can also make remortgaging sensible. If your income has increased, your credit score has improved, or you have paid off other debts, you may now qualify for better mortgage products than were available to you originally.

Lenders assess affordability based on your income, outgoings, credit history, and employment stability. If your circumstances have strengthened, you may be able to access lower rates, borrow additional funds through a further advance, or switch to a more flexible product.

On the other hand, if your financial situation has worsened, such as a reduction in income, increased debts, or a damaged credit file, remortgaging may be more difficult or result in higher rates. In this case, it may be worth staying with your current lender and exploring a product transfer, which often involves a simpler affordability assessment and no new credit check.

Review your credit report before beginning the remortgage process. Correct any errors, pay down outstanding balances where possible, and avoid taking on new credit in the months leading up to your application. These steps can improve your credit profile and expand your options.

Step 6: Consider the Timing

Timing plays a significant role in whether remortgaging makes sense. Beyond your deal end date and rate changes, consider broader economic and personal factors.

If the Bank of England has recently increased the base rate, or if further increases are expected, locking in a fixed rate sooner rather than later can protect you from future rises. Conversely, if rates are falling, you may benefit from waiting, though predicting rate movements is difficult and carries risk.

Your personal plans also matter. If you expect to move house within the next year or two, the costs and effort of remortgaging may not be justified, particularly if there are significant upfront fees. Similarly, if you plan to pay off a large portion of your mortgage soon, such as from an inheritance or bonus, it may make sense to wait or choose a more flexible product with lower overpayment restrictions.

Consider also the time required to complete a remortgage. The process typically takes four to eight weeks, though it can be longer if there are complications with the property valuation, legal work, or affordability assessment. Start early enough to ensure your new deal is in place before your current one ends.

Practical Tips for Deciding When to Remortgage

  • Set reminders: Mark your calendar three to six months before your deal ends so you do not miss the remortgage window.
  • Monitor rates regularly: Even if your deal is not ending soon, keep an eye on market rates. Signing up for rate alerts from comparison sites can help you spot opportunities.
  • Use a mortgage broker: Brokers have access to the whole market, including exclusive deals not available to the public. They can also handle much of the paperwork and advise on timing.
  • Consider a product transfer first: If you are happy with your current lender and their rates are competitive, a product transfer avoids the costs and hassle of switching lenders.
  • Factor in your long-term plans: Remortgaging makes most sense if you plan to stay in the property and on the new deal for at least a couple of years. If you expect major life changes, wait or choose a more flexible product.

Common Mistakes to Avoid

Many homeowners make avoidable mistakes that cost them money or limit their options:

  • Staying on the SVR: Failing to remortgage when your deal ends and simply drifting onto the SVR is one of the costliest mistakes. The SVR can be 2 to 3 percentage points higher than competitive fixed rates.
  • Focusing only on the rate: A low interest rate is important, but high upfront fees or restrictive terms can make a deal less attractive overall. Always compare the total cost over the deal period.
  • Ignoring early repayment charges: Switching deals mid-term without calculating the ERC cost can wipe out any potential savings.
  • Not checking eligibility first: Applying for mortgages you are unlikely to get leaves hard searches on your credit file, which can harm your score. Use eligibility checkers or speak to a broker before applying.
  • Leaving it too late: Starting the remortgage process too close to your deal end date can result in delays, forcing you onto the SVR for several months while the paperwork is completed.
  • Overstretching: Remortgaging to borrow more or extend the term can reduce monthly payments, but increases the total interest paid over the life of the loan. Be realistic about affordability and long-term costs.

Frequently Asked Questions

Can I remortgage before my fixed rate ends?

Yes, you can remortgage at any time, but if your deal has not ended you may face an early repayment charge. Calculate whether the interest savings justify the ERC cost. Many lenders allow you to apply for a new deal up to six months before your current one ends without penalty.

How often should I remortgage?

Most homeowners remortgage every two to five years, coinciding with the end of their deal period. Remortgaging more frequently than this usually incurs unnecessary costs unless rates have fallen dramatically or your LTV has improved significantly.

Is it better to remortgage with my current lender or switch?

It depends on the rates and terms offered. Your current lender may offer a product transfer, which is quicker and cheaper, but switching lenders often gives you access to better rates. Compare both options and consider using a broker to assess the whole market.

Will remortgaging affect my credit score?

Applying for a remortgage involves a hard credit search, which can cause a small, temporary dip in your score. However, successfully managing a new mortgage and making payments on time will improve your score over time. Avoid making multiple applications in a short period.

Can I remortgage if my property value has fallen?

If your property value has decreased and your LTV has worsened, you may find fewer competitive deals available or face higher rates. You may still be able to remortgage, but the options will depend on how much equity you have and your financial circumstances. Your current lender may be more willing to offer a product transfer in this situation.

Do I need a solicitor to remortgage?

Yes, conveyancing work is required to transfer the legal charge on the property. Many lenders offer free legal services for straightforward remortgages, particularly if you stay with the same lender. If not, expect to pay £300 to £500.

Conclusion

Remortgaging makes sense when your deal is ending, when better rates become available, when your LTV has improved, or when your circumstances change in a way that qualifies you for more competitive products. The key is to start the process early, calculate all the costs involved, and compare the savings over a realistic time horizon.

Do not wait until your fixed rate expires and you fall onto the SVR. Begin reviewing your options at least three to six months in advance, use comparison tools or a mortgage broker to explore the market, and ensure your finances and credit profile are in good shape.

Remortgaging is not always the right move, particularly if the costs outweigh the savings or if your plans are uncertain. However, for most homeowners who have reached the end of their deal period or whose circumstances have improved, remortgaging offers a valuable opportunity to save money and secure better terms.

As of June 2026, rates change frequently, so verify current terms with an FCA-authorised lender or adviser before deciding. Eligibility, limits, fees, and availability vary by lender, product, and your circumstances. This information is general educational guidance and not regulated mortgage advice. Refisage is not authorised by the Financial Conduct Authority. Consider speaking to an FCA-authorised mortgage adviser to confirm the best approach for your personal situation.