Product Transfer or Remortgage? Compare the Full Cost Before Switching
Stay with your lender or remortgage? Compare fees, payments, eligibility, valuation and timing with this practical mortgage review guide.
By PMS Mortgages · Published 14 October 2026 · Meet Ria Ali
Your home may be repossessed if you do not keep up repayments on your mortgage.
A product transfer vs remortgage comparison starts with the same goal: finding a suitable next deal for your existing mortgage. The routes differ. A product transfer changes the mortgage product with your current lender; a remortgage moves the borrowing to another lender.
Neither route is automatically the right answer. The useful comparison includes your loan, costs, circumstances and plans, rather than choosing whichever is easiest to click or has the lowest advertised rate. This guide helps homeowners in Croydon, Purley and beyond prepare a clear mortgage-review brief.
Start with the mortgage you actually have
Find the outstanding balance, remaining term, repayment method, deal end date and early repayment charge information. If the account has more than one part, record each separately. Two balances ending in different years may need a different review from a single loan.
Then identify the purpose of the change. Are you replacing an expiring rate, raising money, changing the repayment term or planning a move? A straightforward deal change and an application involving additional borrowing do not necessarily have the same requirements. Explain the whole plan at the outset.
What does staying with your current lender involve?
Ask which existing-customer products are available and how the lender would handle the change you need. A product transfer can have a different process and cost structure from moving lenders, but its terms still need checking. A deal displayed in your account is an option to assess alongside your needs.
For an ordinary switch, a lender may have fewer steps than a full remortgage. Do not assume that the same process applies to extra borrowing, a change in borrowers, repayment method or other adjustments. Halifax’s public switching guidance, for example, describes its own fees and procedures; another lender’s requirements can differ.
What does moving to another lender involve?
A new lender needs to assess the proposed application and property under its criteria. Prepare the requested income, commitment and property information. Explain any change since the original mortgage, such as self-employment, parental leave or additional credit.
Ask what valuation and legal work is required, how it is arranged and who pays for it. Some products include an incentive or contribution, but the details matter. Confirm what is covered, what is excluded and whether your transaction fits the offer. A headline benefit does not explain every potential cost.
Compare fees and payments on the same basis
Use the same required borrowing amount, repayment method and term when asking for comparisons. Record whether product fees are paid upfront or added to the loan. If a fee is added, the balance and interest paid change. Include applicable advice fees and any charge for leaving the existing mortgage.
For a teaching example, imagine a £300,000 interest-only loan assessed over a 24-month period. Option A uses an invented constant 5% rate and no product fee. Option B uses an invented constant 4.9% rate and a £999 fee paid upfront.
Illustrative comparison | Option A | Option B |
|---|---|---|
Monthly interest payment | £1,250 | £1,225 |
24 months of interest | £30,000 | £29,400 |
Upfront product fee | £0 | £999 |
Interest plus that fee | £30,000 | £30,399 |
The £25 monthly saving totals £600, which is less than the £999 fee. This simplified example excludes legal, valuation, advice and exit costs and does not compare available products. The capital remains outstanding. Interest-only borrowing requires an acceptable repayment strategy and is not suitable for everyone. For a repayment mortgage, compare the remaining balances as well as payments and fees.
Property value and loan-to-value need checking
An estimated property value may help with initial planning, but the value accepted for the mortgage comparison matters. Ask which value has been used and whether it is confirmed. If your calculations depend on a particular loan-to-value band, identify that dependency before relying on a rate.
For illustration, £240,000 borrowing against an assumed £400,000 value represents 60% loan-to-value. Against £380,000, it is approximately 63.2%. These are arithmetic examples, not lender valuations. The accepted value and actual product criteria decide which options can be investigated.
Review the dates as well as the rate
Record when the current deal ends, when any proposed offer expires and when the switch is intended to complete. Reserving a deal and starting it are separate events. Confirm whether a charge applies on the planned completion date and how delays would affect the arrangement.
Ask what happens if a product is withdrawn or you want to reconsider before completion. Avoid assuming that every reserved rate can be changed without cost or further assessment. Keep the adviser informed about changes to the application or your circumstances.
Flexibility can change the decision
Discuss plans to move, make substantial overpayments or repay the loan sooner. Review the relevant conditions alongside the initial payment. A longer repayment term may reduce the payment while increasing the period over which interest is paid, so a smaller monthly figure alone does not settle the decision.
If part of your mortgage is still on a different deal, read our two-part mortgage guide. If a home move is likely, explore the porting guide before reviewing the existing loan in isolation.
A useful instruction for your adviser
My deal ends on this date and the balance is approximately this amount.
These are the repayment terms and any separate mortgage parts.
These income or household commitments have changed.
I want to replace the deal, borrow more or make another specified change.
These are my likely moving or overpayment plans.
Please compare staying and moving, including fees, balances and timing.
PMS Mortgages can investigate relevant options and explain the recommendation and fees. Book a mortgage review, explore remortgaging advice or read our guide to an approaching fixed-rate expiry.
General information only. Availability and suitability depend on the lender, property, affordability and your circumstances. The examples are not quotations or recommendations.
When to start: a remortgage timeline
Six months before your deal ends
Find your deal end date and any early repayment charges, check your balance and estimate your loan-to-value. Think about whether you want to move, borrow more, overpay or change the term. Many mortgage offers remain valid for around three to six months, so this is a good time to start comparing.
Four to five months before
Ask your current lender what product transfer rates it offers you, compare them with other lenders including fees, and gather recent payslips, bank statements and, if self-employed, your latest tax documents.
Two to three months before
If you are moving to a new lender, apply so there is time for the valuation, underwriting and legal work. If you are switching with your current lender, you can often book a new deal within a few months of the end date. If rates fall after you secure an offer, ask whether you can switch before completion.
The final month
Check the new deal starts the day after your current one ends. If you do nothing, your mortgage usually moves to the lender’s standard variable rate, which is often higher.
Remortgaging a Croydon flat
Many Croydon homeowners live in leasehold flats, including newer developments near East Croydon and converted period buildings. A new lender will value the property and may ask about the lease, service charges and building safety information. Delays obtaining building information can hold up a remortgage, so start early. A product transfer usually does not need a new valuation. Our leasehold flat checklist explains what to gather.
If your circumstances have changed
If you have become self-employed, reduced your hours or taken parental leave, a new lender will assess your current income. A product transfer may not involve a full affordability check. We review remortgages for homeowners across Croydon; find out more about our remortgage advice and our mortgage broker service in Croydon.
Sources and further reading
Frequently asked questions
A product transfer changes the deal with your current lender. A remortgage moves the borrowing to another lender. Compare the available terms and total costs.
No universal rule applies. The transaction and lender requirements matter, particularly if you need extra borrowing or other changes. Check the actual case.
Compare the rate with fees, remaining balance, flexibility and the period you expect to keep the deal. The lowest headline rate is not a complete comparison.
Thinking about your own mortgage?
Speak to an adviser about what this means for your situation. There is no charge for an initial conversation.