Why it’s crucial to consider remortgaging six months before your current fixed rate ends

A fixed-rate mortgage can make budgeting easier because your repayments are predictable. But once the fixed period is coming to an end, your mortgage doesn’t simply “stay the same” automatically. Most borrowers will either move onto a lender’s new rate (often a Standard Variable Rate) or remortgage to a new deal.

Planning ahead, typically around six months before your fixed rate ends, can help the process run more smoothly and give you more choice.

This guide covers when to start your remortgage and why timing matters.

• To decide when to switch, read When’s the best time to remortgage?.
• To understand how long the process may take, read How long does a remortgage take?.
• To prepare your documents, see the remortgaging checklist.
• To decide who to use, read Why use a mortgage adviser for remortgaging?.

You’re giving yourself time to compare deals properly

Mortgage products change frequently. Even within a few months, lenders may adjust pricing, introduce new offers, or withdraw deals.

Starting the remortgage conversation around six months before your fixed rate ends gives you time to:

• review what’s available across lenders
• understand how different terms affect repayments
• consider whether a fixed rate still suits your plans

This reduces the risk of feeling rushed into a decision close to the end date. Interest rates are influenced by wider economic conditions. While no one can predict movements with certainty, starting early can help you avoid being forced to choose a deal at the last minute.

It's not only the interest rate, fees affect the total cost

Some lenders structure their offers with different combinations of:

• Arrangement fees
• Product fees
• Rate/fee trade-offs (a lower rate may come with higher fees, or vice versa)

By searching earlier, you may have more time to compare deals and understand how fees affect the overall cost.

What to look for:

• The total cost over the period you expect to keep the mortgage.
• Whether a fee is payable upfront or added to the mortgage balance.
• How the rate and fee combination changes the long-term picture.

You can reduce the chances of moving onto a higher rate

When a fixed term ends, many borrowers revert to their lender’s Standard Variable Rate (SVR) or another default rate. SVR pricing is set by the lender and can be higher than the fixed rate you were previously paying.

Remortgaging before your fixed rate ends can help you avoid an unwanted jump in repayments. The key is timing: if your new mortgage isn’t in place by the end of the fixed period, you may be exposed to your lender’s default rate for a period.

Remortgaging involves more than just choosing a rate

A remortgage isn’t only about picking an interest rate. Lenders typically carry out affordability checks and require documentation, and many applications involve a valuation.

Working backwards from your fixed rate end date can help you build in time for:

• gathering evidence of income and outgoings
• completing the application process
• valuation and any follow-up questions
• lender processing and underwriting

If anything needs clarification, having a buffer can help prevent delays.

Your financial position may have changed since you took the fixed rate

Over the course of a fixed term, circumstances often shift. That may include changes to:

• income (including bonuses or overtime)
• employment status
• household spending and existing debts
• credit history, including credit file issues that need time to resolve
• the amount you owe compared to your property value

A six-month planning window allows you to consider how these changes could affect what you can borrow and which products may be suitable.

You may be able to use new mortgage features

As your needs evolve, you might find that a different mortgage structure fits better than your current one. Depending on your situation, options may include mortgages with features such as flexibility around repayments.

Starting early gives you time to explore whether any product features could help you manage your finances more effectively, rather than focusing only on the headline rate.

If your property value has increased, you may have more options

Over time, many homeowners build equity as property values change and as they repay their mortgage balance.

That equity can sometimes affect the range of products available, and it may also influence how lenders view your loan-to-value.

In some cases, borrowers may consider whether accessing additional funds is appropriate for their circumstances, though this should be approached carefully and with a clear understanding of the long-term impact.

A note on early repayment charges

If you remortgage before your fixed rate ends, you may be subject to an Early Repayment Charge (ERC), depending on the terms of your current mortgage.

• If you expect to move home soon, you may need to consider early repayment charges on your current or new deal.

Planning ahead helps you factor potential charges into the overall cost comparison, so you can make a decision based on the full picture rather than the new deal alone.

Conclusion

Remortgaging is often most effective when it’s planned, not rushed. Considering your options around six months before your fixed rate ends can help you:

• compare deals with less time pressure
• reduce the risk of moving onto a default rate
• manage paperwork, valuations, and processing time
• account for changes in your financial situation
• build in flexibility if delays occur

With the right preparation, you can approach your remortgage with greater confidence and make choices that better match your needs.