Quick answer
When a fixed deal ends, four options are usually on the table: a product transfer with your current lender (fast, no re-underwriting, but limited to their range), a full remortgage to a new lender (whole-market choice, full affordability re-test), a term extension (lowers the monthly payment, increases the total interest paid), or overpaying before renewal to drop into a cheaper loan-to-value band.
On a £200,000 balance moving from a 2.0% rate to a 5.0% rate, the payment rises from roughly £848 to roughly £1,221 a month — about £373 more. A like-for-like product transfer generally does not need a fresh affordability check; borrowing more or moving lender usually does.
In this guide
Why the jump happens
Millions of UK fixed-rate deals taken out in 2021 and early 2022 locked in rates as low as 1.5% to 2.5%, when the Bank of England base rate sat near record lows. Those deals are now maturing into a very different market. The Bank Rate has been held at 3.75% since June 2026, and average 2-year and 5-year fixed rates were sitting around 5.52% in mid-July 2026. The result is that a borrower renewing today can be moving onto a rate more than double what they fixed at four or five years ago — through no change in their own circumstances, purely because the wider rate environment has moved.
The size of the jump depends on when you fixed and for how long. Someone who fixed for five years in 2021 at 1.5% is facing a much bigger relative increase than someone who fixed for two years in 2024. Either way, the payment shock is the same problem: your outgoings are about to rise, and it is worth understanding your options well before the deal actually ends.
Your four options at a glance
| Option | Speed & checks | Best for |
|---|---|---|
| Product transfer | Days; usually no full affordability check for like-for-like | Circumstances have changed, or you want speed and certainty |
| Full remortgage | Weeks; full affordability and credit re-test | Strong finances, want the whole market or need to change the loan |
| Term extension | Part of a transfer or remortgage; may need affordability sign-off | Payment relief now, accepting a higher lifetime cost |
| Overpay before renewal | No new application; needs lead time before your deal ends | Sitting just above an LTV band threshold (commonly 75% or 80%) |
These are not mutually exclusive. A common sequence is to secure a product transfer as a backstop, keep overpaying in the run-up to renewal to improve the LTV band, and only then decide whether a full remortgage beats the transfer once the market picture is clear closer to the date.
Product transfer: staying with your lender
A product transfer moves you to a new rate with your existing lender, keeping the same balance, term and names on the mortgage. For a like-for-like switch, most lenders do not run a full new affordability assessment, a full credit search, or require a fresh valuation — the mortgage simply moves onto a different rate. That makes it the fastest route, often completing within days, and it is the natural fallback if your income has fallen, you have recently become self-employed, or your credit profile has worsened since you last applied.
The trade-off is choice: you can only pick from your current lender's range, which may not be the most competitive deal in the market. Our product transfer vs remortgage guide goes through the full comparison, including a worked example of where the balance tips the decision one way or the other.
Full remortgage: opening up the whole market
A full remortgage moves your mortgage to a new lender. That means a complete application — a new affordability assessment, a fresh credit search, a property valuation, and legal work (often covered by free-legals deals) — typically taking four to eight weeks. In exchange, you get access to the whole market rather than one lender's range, plus the ability to release equity, change your term meaningfully, add or remove a name, or consolidate other debts where that is the right course of action.
Some lenders apply more relaxed affordability criteria for remortgages than for new purchases, giving weight to an existing track record of payments. Others test remortgage applications exactly as they would a purchase. Our remortgage affordability guide covers how that assessment works and what to do if you would fail a new lender's stress test despite affording your current payments comfortably.
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Start My Free CheckTerm extension: payment relief now, a cost later
Extending the term — either as part of a product transfer or a remortgage — spreads the same balance over more monthly payments, which lowers the payment today. It does not reduce what you owe, and it means paying interest for longer, which raises the total amount repaid over the life of the loan.
Worked example: £200,000 at 5.0%, three term lengths
| Term | Monthly payment | Total repaid over the term |
|---|---|---|
| 20 years | ≈ £1,320 | ≈ £316,800 |
| 25 years | ≈ £1,169 | ≈ £350,750 |
| 30 years | ≈ £1,074 | ≈ £386,500 |
Stretching from 20 to 25 years cuts the monthly payment by about £151 but adds roughly £34,000 in total interest over the life of the loan. Stretching all the way to 30 years cuts the payment by about £246 a month against the 20-year term, but adds roughly £69,700 in total interest. Same balance, same rate — the only thing that moves is how the cost is spread over time.
Our mortgage repayment calculator lets you run your own balance and term against different rates to see the exact trade-off. A term extension does not have to be permanent — some borrowers extend for one deal to manage a difficult year, then shorten the term again at the next remortgage, or use overpayments to bring the effective term back down where the mortgage allows it without an early repayment charge.
Overpaying before renewal and why LTV bands matter
Lenders price mortgages in loan-to-value (LTV) bands, and the bands commonly break at round numbers such as 60%, 75%, 80%, 85% and 90%. Crossing from just above a band into just below it — say from 76% LTV to 74% — can move you into a noticeably cheaper pricing tier, because the lender is taking a smaller slice of risk against the property's value.
This creates a real lever in the run-up to a renewal: if your balance sits just over a band threshold, overpaying enough to drop under it before you renew can be worth more than the overpayment itself once the better rate is applied across the new deal. For example, a £250,000 property with a £190,000 balance sits at 76% LTV; overpaying roughly £2,500 to bring the balance to £187,500 crosses the loan under the 75% line. Whether that unlocks a cheaper tier — and by how much — depends on the specific lender and product, so it is worth checking before your renewal date rather than assuming it.
Property price growth over the life of the deal can achieve the same effect without any extra payments at all, which is another reason a fresh valuation as part of a remortgage or product transfer sometimes reveals a better band than you expected.
Why affordability is re-assessed — and when it isn't
A full remortgage to a new lender is treated broadly like a new application: gross income, committed expenditure and a stress rate are all re-tested against the new balance, even though you are simply replacing an existing debt. This is why some borrowers who comfortably afford their current payments would not pass a new lender's stress test if their income has fallen or their outgoings have grown since they last applied.
A like-for-like product transferis the main exception. Because the balance, term and borrower(s) are not changing, most lenders do not run a full affordability reassessment or a fresh credit search — the FCA's rules on switching for existing, up-to-date borrowers are built around exactly this scenario, to stop borrowers being trapped on an expensive rate purely because they would fail a fresh assessment. The moment you want to borrow more, extend the term significantly, or change who is named on the mortgage, you move outside a simple transfer and a fuller reassessment typically applies.
Timeline: start six months out
A practical sequence, whichever option you eventually take:
- Six months out:get a whole-of-market view of what a remortgage would offer, and check your current lender's likely transfer rate as a baseline.
- Three to six months out: most lenders let you lock in a rate this far ahead, whether by product transfer or remortgage. Securing a deal now does not usually commit you — many lenders let you re-select a cheaper rate if the market moves in your favour before completion, so locking early is typically a one-way bet: protected if rates rise, free to improve if they fall.
- One to two months out: confirm which route you are taking and complete any paperwork a full remortgage needs (valuation, legal work, documentation).
- At expiry:the outcome to avoid is drifting onto the lender's standard variable rate (SVR), which sits well above current fixed rates and can cost hundreds of pounds in a single month.
Frequently asked questions
Can my lender refuse a product transfer?
Yes, in some circumstances. A like-for-like product transfer (same balance, same term, no extra borrowing) is usually straightforward, but a lender can decline or withdraw a specific product if you no longer meet that product's minimum criteria — for example if you are in arrears, or the product has an LTV cap your balance now exceeds because your property has fallen in value. Wanting to change the deal itself — borrowing more, changing the term significantly, adding or removing a name — normally takes you outside a simple transfer and into a fuller application with its own checks.
Does a product transfer need affordability checks?
Usually not, for a genuine like-for-like switch. Because you are staying with the same lender on the same balance and term, most lenders do not run a full new affordability assessment or credit search. This is also the basis of the FCA's modified affordability rules for existing borrowers switching deals, which are designed to stop up-to-date payers being trapped on an expensive rate purely because they would not pass a fresh assessment. Borrowing more, or changing the mortgage's structure, is a different matter and typically does trigger a full reassessment.
Should I extend my term?
It's a trade-off worth weighing carefully rather than a default move. Extending the term lowers the monthly payment because the same balance is spread over more months, but it also means paying interest for longer, which increases the total amount repaid over the life of the loan — sometimes by tens of thousands of pounds, as the worked example above shows. Some borrowers extend temporarily for breathing room and then shorten the term again at a later remortgage or via overpayments, where the mortgage allows it without an early repayment charge.
Last updated: July 2026
