How Early Can I Remortgage Before My Deal Ends?

The Standard Remortgage Window: Three to Six Months

Most UK mortgage lenders allow you to apply for a new remortgage deal between three and six months before your current deal ends. This is widely known as the remortgage window, and it exists specifically to give borrowers enough time to arrange a new deal without falling onto the standard variable rate (SVR).

Here is how the typical timeline works:

• Six months before your deal ends — Some lenders and brokers will begin searching for deals at this point. A growing number of lenders now offer rate locks that last up to six months, giving you the option to secure a rate well in advance.
• Three to four months before — This is the most common point at which homeowners begin the formal application process. Most mortgage offers are valid for three to six months, so applying at this stage means your offer will still be valid when your current deal expires.
• One to two months before — If you have not yet started the process, there is still time, but you will need to move quickly. The conveyancing and legal work alone can take several weeks.

The key point is that you do not need to wait until your current deal has actually ended before you start remortgaging. In fact, waiting until the last minute is one of the most common and costly mistakes homeowners make.

Your existing lender will often write to you around three months before your deal expires, reminding you that your rate is about to change. While this letter is a useful prompt, it should not be the trigger that starts your search. Ideally, you should already be well into the comparison and application process by then.

How Rate Locks Protect You

One of the most valuable features available to remortgagers is the ability to lock in a rate months before your current deal ends. A rate lock means that the lender guarantees the interest rate they have offered you for a set period, typically three to six months. If rates go up during that time, you are protected. If rates go down, many lenders will allow you to switch to the lower rate instead.

How rate locks typically work:

• You apply for a new mortgage and receive a formal offer at a specific interest rate.
• The offer is valid for a set period — usually three to six months.
• You can set the completion date to coincide with the day your current deal expires.
• If interest rates increase before completion, your locked rate stays the same.
• Some lenders offer a rate drop guarantee, meaning if their rates fall before completion, you automatically get the lower rate.

This arrangement means there is very little downside to starting early. You secure a competitive rate with the safety net of knowing you can benefit from any further reductions. It is essentially a one-way bet in your favour.

Not all lenders offer rate locks of the same duration, so it is worth checking with your broker or lender how long the offer will remain valid. Some specialist lenders may have shorter offer validity periods, which could affect your timing.

It is also important to understand that a rate lock is not the same as a binding contract to proceed. If you receive a better offer from another lender before completion, you are generally free to withdraw and go with the alternative deal, although you should check whether any fees apply.

Early Repayment Charges: What to Watch Out For

Early repayment charges (ERCs) are one of the main reasons homeowners hesitate to remortgage before their deal ends. An ERC is a penalty fee charged by your existing lender if you repay your mortgage in full before the end of the agreed deal period. They are designed to compensate the lender for the interest income they will lose when you leave early.

How ERCs are typically structured:

• ERCs are usually calculated as a percentage of the outstanding mortgage balance, typically between 1% and 5%.
• On a two-year fixed deal, ERCs usually apply throughout the two-year period.
• On a five-year fixed deal, ERCs often decrease each year — for example, 5% in year one, 4% in year two, and so on down to 1% in year five.
• ERCs do not apply once your deal period has ended and you have moved onto the SVR.

To put this into perspective, if you have a mortgage balance of £200,000 and an ERC of 3%, the charge would be £6,000. That is a substantial sum and could easily outweigh any savings from moving to a lower rate.

When it might still be worth paying an ERC:

There are situations where paying an ERC can make financial sense. If interest rates have dropped significantly since you took out your current deal, the savings over the remaining term of your mortgage could exceed the cost of the ERC. This requires careful calculation, and a mortgage broker can help you run the numbers.

It is also worth noting that you can start the remortgage application process while your current deal is still active without triggering an ERC. The ERC is only charged when the old mortgage is actually redeemed, which happens on the completion date. So you can apply, get your offer, and time the completion to fall on or after the date your current deal expires, avoiding the ERC entirely.

Product Transfers: A Faster Alternative

If you are approaching the end of your current deal and want a simpler option, your existing lender may offer you a product transfer. This means switching to a new rate with the same lender without going through a full remortgage application.

Product transfers have several advantages when it comes to timing:

• Speed — Product transfers can often be arranged within a few days, compared to four to eight weeks for a full remortgage with a new lender.
• No legal work required — Since you are staying with the same lender, there is no need for conveyancing, which removes one of the most time-consuming parts of the process.
• No valuation needed — Most product transfers do not require a new property valuation.
• Simpler application — Many lenders do not require a full affordability assessment for a product transfer, particularly if you are not borrowing additional funds.

However, there are potential downsides. Product transfer rates are not always as competitive as the deals available from other lenders. By limiting yourself to your existing lender's products, you may miss out on a better rate elsewhere. This is why it is always worth comparing product transfer rates against the wider market before making a decision.

Some homeowners choose to secure a product transfer as a safety net while simultaneously pursuing a remortgage with a different lender. If the remortgage completes in time, they go with the new lender. If it does not, they fall back on the product transfer rather than moving onto the SVR. This dual approach requires some coordination but can be an effective strategy.

What Happens If You Miss the Remortgage Window

If your current deal expires before you have arranged a new one, you will almost certainly be moved onto your lender's standard variable rate. The SVR is the default rate that your mortgage reverts to once any promotional deal period ends, and it is typically much higher than the rate you were previously paying.

As of recent months, SVRs from major UK lenders have ranged from around 6% to over 8%, compared to competitive fixed rates that may be significantly lower. On a £200,000 mortgage, the difference between a competitive fixed rate and a typical SVR could cost you several hundred pounds per month in additional interest.

Can you still remortgage after moving to the SVR?

Yes, absolutely. Moving onto the SVR does not lock you in — you can remortgage at any time while on the SVR without facing early repayment charges. In fact, being on the SVR can actually simplify the timing of your remortgage because there is no deal end date to coordinate around.

However, every month you spend on the SVR is a month of paying more interest than you need to. This is why proactive planning is so important. Even if you have already missed the ideal window, starting the remortgage process as soon as possible will minimise the amount of time you spend on the higher rate.

Tips if you find yourself on the SVR:

• Begin the remortgage process immediately — do not wait.
• Contact a mortgage broker who can quickly identify suitable deals.
• Consider a product transfer with your existing lender as an interim step.
• Make a note of the SVR cost so you can calculate exactly how much the delay has cost you — this can be a useful motivator for planning ahead next time.

Creating Your Remortgage Timeline

To ensure you do not miss the remortgage window, it helps to create a simple timeline. Here is a suggested plan based on a typical two-year or five-year fixed-rate deal:

Six months before your deal ends:

• Check your current mortgage details — balance, rate, and deal end date.
• Review your credit report and address any issues.
• Start researching remortgage rates and speak to a mortgage broker.
• If available, consider locking in a rate with a six-month validity period.

Three to four months before:

• Gather your documents — payslips, bank statements, identification.
• Submit your remortgage application if you have not already done so.
• Check what product transfer rates your existing lender is offering.

Two months before:

• Chase up any outstanding requirements from the lender or solicitor.
• Confirm that the valuation has been completed and the offer issued.
• Ensure your solicitor has everything needed to complete the legal work.

One month before:

• Confirm the completion date with your solicitor.
• Set up a new direct debit if you are switching lenders.
• Review the final mortgage offer to ensure everything is correct.

By following this timeline, you give yourself plenty of breathing room and reduce the risk of falling onto the SVR. Remember, the remortgage process is not something that should be rushed — starting early gives you the best chance of securing the most competitive deal available.