Key takeaway: Remortgaging in the UK typically makes sense three to six months before your current deal ends, when you can lock in a new rate without paying early repayment charges. Most borrowers switch to avoid reverting to their lender’s standard variable rate (SVR), which is usually higher than available fixed or tracker deals. Start comparing rates early, check your loan-to-value ratio, and decide whether a product transfer with your current lender or switching to a new lender offers the better deal for your circumstances.

Remortgaging is how you replace your existing mortgage with a new deal, either with your current lender (a product transfer) or by switching to a different lender. According to MoneyHelper, the main reasons to remortgage are to secure a lower interest rate, borrow additional funds through a further advance, or change the mortgage term. The process involves comparing the cost of staying on your current deal against the savings from switching, factoring in any fees and early repayment charges. Foundational texts such as Principles of Finance explain that borrowers refinance when market conditions or their personal equity position improves enough to offset the transaction costs.

Here are the eight essential steps to remortgage successfully and secure the best rate available to you.

1. Check When Your Current Deal Ends

Your mortgage offer document states the end date of your initial fixed, tracker, or discount period. Mark this date and set a reminder for three to six months beforehand. Once your deal ends, you automatically revert to your lender’s standard variable rate (SVR), which is typically 1 to 3 percentage points higher than competitive fixed rates. Switching before reversion saves you hundreds of pounds per year on a typical mortgage balance.

2. Start Comparing Rates Three to Six Months Early

Most lenders allow you to reserve a new rate up to six months in advance. Lock in a rate as soon as you are within this window, especially if the Bank of England base rate is rising or if you expect upward pressure on mortgage pricing. Early reservation protects you from rate increases while you complete the application. Compare both your current lender’s product transfer options (which require less paperwork and no valuation fee in many cases) and deals from other lenders to see which offers the lowest overall cost.

3. Calculate Any Early Repayment Charges

If you are still within your initial deal period, check whether an early repayment charge (ERC) applies. ERCs are typically 1 to 5 per cent of the outstanding balance and decline each year until the deal ends. For example, a mortgage with a five-year fixed rate might charge 5 per cent in year one, 4 per cent in year two, and so on. Paying this penalty almost never makes financial sense unless you are releasing a large amount of equity or moving house. Wait until the deal ends unless extraordinary circumstances apply.

4. Assess Your Current Loan-to-Value Ratio

Your loan-to-value (LTV) ratio is the proportion of your property’s current market value that you still owe. If your property has increased in value or you have paid down the mortgage, your LTV will have fallen since you took out the original deal. Lower LTV bands (for example, moving from 85 per cent LTV to 75 per cent) unlock access to cheaper interest rates. Order a desktop valuation or check recent sale prices for similar properties in your area to estimate your current LTV before applying.

Read also: When Does It Make Sense to Remortgage Your Mortgage

5. Decide Between a Product Transfer and Switching Lenders

A product transfer keeps you with your existing lender and usually involves minimal paperwork, no valuation fee, and faster completion. However, you are limited to the rates your current lender offers, which may not be the most competitive on the market. Switching to a new lender gives you access to the full range of deals but requires a new affordability assessment, a property valuation, and conveyancing (legal work). Compare the interest rate difference against the total fees to determine which route saves you more over the new deal period.

6. Factor in Arrangement Fees and Other Costs

Most remortgage deals charge an arrangement or product fee, which ranges from zero (with a slightly higher interest rate) to £1,500 or more (with a lower rate). You can usually add the fee to the mortgage balance rather than paying it upfront, but this increases the total interest you pay over time. Also budget for valuation fees (typically £250 to £600), legal fees (often free if the new lender covers them as part of a switcher incentive), and any exit fees your current lender charges (usually around £50 to £100). Add these costs together and calculate the break-even point to confirm the switch is worthwhile.

7. Obtain an Agreement in Principle

An agreement in principle (AIP), also known as a decision in principle, is a conditional offer from a lender stating how much they are willing to lend you based on a soft credit check and your declared income. Having an AIP before you apply for the full mortgage speeds up the process and gives you confidence that your application will be accepted. Most lenders provide an AIP within minutes online, and it remains valid for 30 to 90 days.

8. Time Your Application to Avoid Reverting to the SVR

Submit your full remortgage application at least eight to twelve weeks before your current deal ends. This allows time for the lender to complete the valuation, underwriting, and legal work without you slipping onto the SVR. If you are switching lenders, instruct a conveyancer as soon as your mortgage offer is issued. If rates have fallen since you reserved your deal, ask whether the lender will honour a lower rate at completion (some will, others will not). Once the new mortgage completes, your old deal is repaid and the new rate takes effect immediately.

Final Considerations

Remortgaging is a standard part of owning a property in the UK, and most borrowers switch deals every two to five years to avoid paying the higher SVR. The earlier you start comparing rates and the more options you review, the better your chances of securing a deal that reduces your monthly repayments and saves you thousands of pounds over the life of the mortgage. As of August 2026, rates remain sensitive to the Bank of England base rate and economic conditions, so verify current terms with an FCA-authorised mortgage adviser or lender before making your decision.

This article provides general educational information about remortgaging in the UK and is not regulated mortgage advice or personalised financial, lending, or legal advice. Refisage is not authorised by the Financial Conduct Authority (FCA). Eligibility, interest rates, product availability, and fees vary by lender, product, and your individual circumstances. Stamp duty and government schemes differ across England, Scotland, Wales, and Northern Ireland. Always speak to an FCA-authorised mortgage adviser or consult MoneyHelper before making any remortgage decision. Your home may be repossessed if you do not keep up repayments on your mortgage.