Product Transfers Explained: Exactly How a Mortgage Rate Switch Works

Last reviewed and updated by Darren Shepherd: September 2026

A product transfer is where you stay with your existing lender and move onto one of their new deals when your current rate ends. There is usually no affordability check, no valuation visit and no solicitor, you can normally book it three to four months ahead, and the new rate starts the day the old one finishes. That is the short version. In my years in the industry I have watched this become the way most people now renew their mortgage, and I have also watched a great many of them do it without understanding what they were agreeing to, or what they were giving up. This guide is the long version.

What a product transfer is, and the other names it goes by

Lenders cannot agree on what to call it. Halifax, Santander and Virgin Money say product transfer. Nationwide, Leeds and The Mortgage Works say rate switch. HSBC says product switch. Coventry talks about switching your deal, and the industry calls the whole thing retention business, which tells you what it is really for. They all mean the same transaction: the mortgage stays exactly as it is, same lender, same balance, same term, and only the interest rate product attached to it changes.

It exists because it is far cheaper for a lender to keep you than to win a new customer. That is worth remembering, because it explains almost every rule that follows, including why the process is so easy and why the rate you are offered is not always the best one available to you.

How the process actually works, step by step

The mechanics vary a little by lender, but the shape is the same everywhere.

1. The letter arrives. Somewhere between four and six months before your deal ends, your lender writes to tell you the date your rate expires, what the reversion rate will be if you do nothing, and that you can now pick a new deal. If you use a broker, the lender's systems flag the case to them at the same point.
2. The lender decides your loan to value without visiting. Nobody comes round with a clipboard. The lender takes your current balance and an indexed valuation, which is your last known valuation moved up or down in line with a house price index, and uses that to place you in a rate band. Nationwide, Leeds and The Mortgage Works use an automated valuation, Skipton and Bank of Ireland use the ONS index, Santander updates its figures quarterly. If you think the figure is wrong, most lenders let you challenge it, and some will do a free reassessment if the dispute would move you into a cheaper band.
3. You see the existing-customer range. This is the point people miss. You are shown your lender's retention products, not the whole market and not always the same products they offer new borrowers. Nationwide and Coventry state that existing-customer rates are as good as or better than their new-customer equivalents. Barclays runs a separate existing-customer range. Other lenders make no promise either way.
4. You choose, and an offer is produced. Online journeys are quick, sometimes minutes. You pick the rate, decide whether any product fee is paid upfront or added to the loan, and accept the offer. NatWest gives you 14 days to accept before the offer lapses. Virgin Money now treats an offer as accepted automatically ten days after it is issued unless you cancel.
5. The new rate starts when the old one ends. There is no gap and no month on the standard variable rate, provided you complete the switch in time. Several lenders only start new rates on the first of the month, which means a cut-off in the month before: Halifax and Nationwide want the switch completed by the 20th, Coventry by the 23rd, Bank of Ireland by the 18th, Leeds needs at least eight full working days, The Mortgage Works five days. Miss it and you will spend a month on the reversion rate.

How far ahead can you book a product transfer?

This is where the picture has changed most in the last two years. In 2023 the Mortgage Charter encouraged lenders to let borrowers lock a new deal in up to six months ahead, and most did. Since then almost every major lender has quietly pulled that back to three or four months, on the basis that most people apply in the last few months anyway. As of September 2026 the windows look like this:

Two things to take from that table. First, these windows move, usually with little announcement, so treat them as a guide and check your own lender's current position when your letter arrives. Second, a couple of lenders, notably Principality and the Co-operative Bank, still offer six months, and Principality is the odd case where you get a longer window by going direct than by going through a broker.

What happens if rates fall after you have booked?

A product transfer is booked weeks or months before it starts, so what happens if the lender cuts its rates in between is the question I get asked most. Lenders fall into three camps, and knowing which camp yours is in matters more than almost anything else on this page.

• Change your mind right up until the new rate starts. Halifax and Lloyds let you cancel and rebook at any time before the transfer takes effect. HSBC says you can change your mind up until the new rate is applied, and if you have accepted an offer and rates then drop, you can call and select another rate. NatWest lets you change the product before completion and cancel at any time before the new rate begins. Nationwide lets you cancel on or before the 20th of the month before the new deal starts and then reapply. Coventry lets you go back through the process up to the 23rd of the month before, and refunds the product fee automatically. Skipton says plainly that if rates fall before your current deal ends, you can switch to the lower option.
• A hard fourteen-day cut-off. Santander allows changes or cancellations up to 14 days before the confirmed start date and none inside that. Yorkshire Building Society and Accord allow a like-for-like switch to a cheaper rate up to 14 days before the new deal starts, and treat the acceptance as binding after that. TSB's cut-off is 14 days before the end of the month prior to the new product starting.
• Locked in a set number of working days before. Metro Bank lets you create as many offers as you like up to ten clear working days before the switch date, then locks it. The Mortgage Works allows cancellation up to five days before completion. Bank of Ireland closes changes on the 18th of the month before, the Co-operative Bank on the 15th. Virgin Money's automatic acceptance after ten days means you need to cancel by phone before that date if you want to rebook.

The practical lesson is simple. Booking early costs you nothing at most lenders, because you can trade down if pricing improves, but you need to know your lender's cut-off date and put it in your diary. Nobody at the lender is going to ring you to say their rates have fallen.

Fees, cashback and whether the rates are really the same

Product transfer deals carry the same kinds of product fee as any other mortgage, typically nothing, £999 or £1,499, and you will usually be offered the choice of paying upfront or adding the fee to the loan. Adding it means paying interest on it for the life of the deal, so on a small balance a fee-free deal at a slightly higher rate is often cheaper overall. Halifax only charges the fee once if you cancel and rebook the same product. Metro Bank has charged no product fees on residential rate switches since 2017. Some lenders, Coventry among them, include cashback products in their existing-customer range, though Leeds will not let cashback be used against the product fee.

On rates, do not assume loyalty is rewarded. A lender's retention range is priced to keep you, not to beat the market, and there is nothing in the rules that says it has to match what they offer new customers. This is the whole reason to compare before you accept, which I come back to at the end.

Why there is usually no affordability check

The reason a product transfer is so easy rests on two things. The first is the regulator's position: the rules have long allowed a straight rate change with no extra borrowing to go ahead without a full affordability reassessment, since 2020 it has not needed to be an advised sale either, and in July 2025 the FCA went further, removing the requirement for a full affordability check when you reduce your term and making it easier to switch without the conversation being forced into a formal advice process. The second is the Mortgage Charter, which the main lenders signed in June 2023 and which still stands. It commits them to let customers who are up to date with their payments switch to a new deal at the end of a fixed rate without another affordability check.

The key phrase there is "up to date". Skipton will not offer an online switch if you are in arrears, and the Mortgage Works needs you to be clear of arrears. Nationwide allows a switch if you are no more than one month behind. Halifax will pause a booked transfer if arrears build up between the offer and completion until they are cleared. Virgin Money will not do a straight switch if you have a consent to let on the property. If any of that applies to you, the answer is not necessarily no, but it will mean a phone call rather than a click.

What you can and cannot change at the same time

A product transfer changes the rate. The moment you want to change anything else, you are into different territory, and each lender draws the line in a slightly different place.

• Borrowing more is never part of the transfer itself. It is a further advance, a separate credit-checked application. Halifax will take the transfer and the further advance as a single submission, NatWest will consider additional borrowing at the same time subject to underwriting, and HSBC and Nationwide treat them as two separate applications. Metro Bank is stricter still: switches only, and any other change has to wait until at least six months after completion. If the extra borrowing needs to complete first, as with Yorkshire Building Society, the order matters.
• Changing the term is sometimes allowed inside the transfer and sometimes not. Skipton lets you shorten or lengthen a repayment mortgage as part of the switch. Principality lets a broker extend the term within the transfer. HSBC says a term change needs a new mortgage application. Nationwide asks you to change the term separately, and warns that doing it while a switch is pending will invalidate the switch. Extending the term into retirement will trigger an affordability assessment almost everywhere.
• Changing the repayment type from interest only to repayment is usually welcome but will involve income evidence. Going the other way, from repayment to interest only, is rarely available within a transfer.
• Santander is worth a specific mention: once you have a future-dated transfer booked, you cannot make any other change to the mortgage until it starts, including extending the term, taking additional borrowing or using the Mortgage Charter's temporary interest-only option.

The quirks that catch people out

Every lender has one or two rules that do not appear in the glossy leaflet. These are the ones I see cause the most trouble.

• Interest-only mortgages. Halifax will only switch an interest-only mortgage if you can show a valid repayment plan, and direct customers have to do it by phone or video rather than online. Nationwide will not allow term changes online on interest only.
• Negative equity. Most lenders cap transfers at their normal loan to value bands, but TSB offers its product transfer range up to 120% loan to value, so being in negative equity does not necessarily mean being stuck on the reversion rate.
• Down valuations. Because the loan to value is set by an index, a fall in the index can push you into a more expensive band. Yorkshire Building Society will cancel a booked transfer if a later valuation comes in lower, refunding the fee, and charges £70 if you want a proper revaluation.
• The Co-operative Bank moves everyone early. Rather than starting new rates on your expiry date, the Co-op switches all customers from the 15th of the month before maturity, with an interest adjustment if you are moving early onto a higher rate.
• Cancelling to go elsewhere. Yorkshire Building Society has confirmed it will charge the early repayment charge if you cancel an accepted transfer in order to remortgage to another lender. Santander used to do the same and dropped it in 2023. If you might still remortgage, check the cancellation terms before you accept the transfer offer, not after.
• Who has to cancel. At Santander, only the broker who submitted the transfer can cancel it. If you and your broker part company, that becomes awkward.
• Switching too close to the wire. Yorkshire Building Society warns that switching fewer than seven days before your deal expires can mean a spell on its standard variable rate before the new rate kicks in.

Early repayment charges and starting the new rate early

If your current deal still has time to run, the question is whether you can move onto the new rate before it ends without paying the early repayment charge. Most lenders waive it in the final stretch. Halifax, Nationwide, Skipton and Metro Bank let you start a new rate within the last three months without a charge. HSBC's window is 90 days, and its charge reduces daily before that. Santander goes further: if the new rate is lower than your current one, you can choose to start it straight away and the charge is waived, though that immediate start cannot then be cancelled. Tracker customers at NatWest, Nationwide and HSBC can move to a fixed rate at any time without a charge. Outside those windows, switching early means paying the charge, and at several lenders that has to be done by phone rather than online, with the charge paid upfront.

Two cautions. Starting a new rate early only makes sense if the new rate is lower than the one you are leaving, which is not always the case. And at most lenders the overpayment allowance is separate from the switch, so if you are planning a lump sum, check whether it is best made before or after the transfer completes.

Doing it yourself, or through a broker

You can do a product transfer yourself, online, in a few minutes, and for a lot of people that is exactly what happens. The lender's online journey is what the rules call execution only: no advice, no recommendation, you pick and you click. Leeds Building Society even labels its channels that way, online as execution only, phone and broker as advised.

Going through a broker changes two things. The first is that a broker can put the lender's transfer offer side by side with the whole remortgage market, which is the only way to know whether the loyalty rate is any good. The second is that the transfer becomes advised, so someone is responsible for checking it suits you. Brokers are paid by the lender on a product transfer, typically 0.20% to 0.30% of the balance, which is less than they earn on a remortgage, and it is why some brokers charge a fee for transfers and others do not. Ask. What I would say, having sat on both sides of this, is that a broker who only ever recommends the product transfer is not doing the job, and neither is one who only ever recommends a remortgage.

What happens if you do nothing

Your mortgage rolls onto the lender's reversion rate, usually the standard variable rate, which in 2026 is commonly two to three percentage points above the best fixed deals. On a £200,000 balance that is several hundred pounds a month. There is no penalty for leaving the SVR whenever you like, so it is not a disaster, but it is an expensive place to sit while you think about it. The FCA has replaced its older guidance on this with a plain rule that lenders must deal fairly with customers whose deals have expired, which is welcome, but it does not put money back in your account.

The sensible order of events

Six months out, check what a remortgage would cost you and, if it is good, get an offer in place. Three to four months out, when your lender's window opens, book the best transfer rate they will give you. Then, in the weeks before the start date, watch the market. If rates fall, rebook the transfer before your lender's cut-off. If the remortgage still wins, take it and let the transfer lapse, having first checked the cancellation terms. If the transfer wins, let the remortgage offer expire. Done properly, you have spent nothing and given yourself two bites at the cherry.

If your deal is ending in the next six months and you would like someone to run both routes against each other, Debbie at DS Financial does exactly that, with your own lender's transfer offer on one side and the whole market on the other. For the surrounding picture, see what happens when your fixed rate ends and the full remortgage guide.

General information, not financial advice. Lender rules and windows are correct as of September 2026 and change frequently, always check your own lender's current terms. Your home may be repossessed if you do not keep up repayments on your mortgage. For advice on your situation, Darren Talks recommends DS Financial (Appointed Representative of Stonebridge Mortgage Solutions Ltd, FCA Firm Ref: 835094).

Sources: GOV.UK, the Mortgage Charter, FCA, PS25/11 Mortgage Rule Review, MoneyHelper, remortgaging, and the published product transfer terms of Halifax, Nationwide, NatWest, Santander, Barclays, HSBC, TSB, Virgin Money, Skipton, Coventry, Leeds, Yorkshire Building Society, Accord, Principality, Metro Bank, The Mortgage Works, Bank of Ireland and the Co-operative Bank, all checked in September 2026.