Is porting a mortgage a remortgage?
Porting usually means applying to take an existing mortgage product to a new property; it is not an automatic transfer of the old loan. The lender rechecks affordability, credit and the property, and any extra borrowing may be on a separate rate.
The first task is to identify whether the reader actually needs the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. Compare the current position at MoneyHelper guidance — Mortgage Calculator; retain the dated record used for the answer.
Which rules apply to Mortgage Porting?
The answer to which rules apply to mortgage porting is built from the following facts and the dated guidance at Financial Conduct Authority guidance — Mortgages.
Mortgage Porting Guide uses the following rule: A lower initial rate can still cost more if fees, early-repayment charges or a shorter deal period outweigh the saving. It answers the part of the page concerned with the practical question described by porting mortgage, interpreted within the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step; it should not be borrowed automatically for a different product, person or event.
For the the practical question described by port mortgage, interpreted within the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step question, the old mortgage is redeemed on sale and a new legal charge is created. In Mortgage Porting Guide, retain the source and note which cost or status the statement controls.
The product rate may be portable while the exact loan amount is not. That is the operative point for Mortgage Porting Guide when the reader is dealing with the practical question described by port mortgage calculator, interpreted within the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. A later different circumstance should be applied only to the affected line of the working.
What should I know about porting mortgage?
This question belongs on Mortgage Porting Guide because it concerns the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. Apply the page-specific point—“The old mortgage is redeemed on sale and a new legal charge is created”—and record separately any effect of “The new property may fail valuation or policy checks”. The supporting item is agreement in principle. Current official guidance is linked at MoneyHelper guidance — Mortgage Calculator.
What does a £180,000 worked example show for Mortgage Porting?
Case study for Mortgage Porting Guide. Leila Iqbal records the inputs on a document dated 12 December 2026 before applying the rule. A borrower ports £180,000 at 2% and needs another £40,000 at 5.5%. The two parts have different rates and end dates, so future remortgaging may be more complicated than one blended-rate figure suggests.
Notice which input produces the result. Leila Iqbal could reproduce the same method from the saved record, while a reader with different facts must start again from Bank of England data — Bank Rate.asp.
What changes if downsizing can leave part of the old balance subject to a charge?
What changes if downsizing can leave part of the old balance subject to a charge? For this page, the relevant sensitivity tests concern the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. Each scenario below changes one fact at a time.
A timing difference: Downsizing can leave part of the old balance subject to a charge. A written note shows whether the amount, deadline, route or evidence changed.
A household change: The new property may fail valuation or policy checks. The recalculation is checked against the official source rather than an old saved estimate.
A revised figure: A longer completion gap can exceed the lender’s refund window. The date is written next to the revised input so the Mortgage Porting Guide result can be explained later.
When does port mortgage matter?
A practical answer for Mortgage Porting Guide separates the governing fact from the later change. The governing fact is The product rate may be portable while the exact loan amount is not. The sensitivity check is whether a longer completion gap can exceed the lender’s refund window. Use original mortgage offer. to show which facts applied, then verify them at Financial Conduct Authority guidance — Mortgages.
Which original mortgage offer should I keep for Mortgage Porting?
Leila Iqbal labels each document with its date and purpose. The evidence pack is limited to the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step, making the result easier to reproduce or challenge.
Evidence to keep for Mortgage Porting Guide
- Original mortgage offer. In Leila Iqbal’s Mortgage Porting Guide file, this confirms the effective date.
- New property valuation. In Leila Iqbal’s Mortgage Porting Guide file, this shows the person or product status.
- Agreement in principle. In Leila Iqbal’s Mortgage Porting Guide file, this supports the transaction history.
Errors that would change this page’s answer
- Comparing monthly payments without adding fees and early-repayment charges. For Mortgage Porting Guide, that can send the reader to the wrong process.
- Extending the term without checking the extra lifetime interest. For Mortgage Porting Guide, that can make an old rate look current.
Which rule applies to port mortgage calculator?
For Mortgage Porting Guide, this question is answered by the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. A gap between sale and purchase can affect charge refunds. Next test whether a longer term can reduce the monthly payment while increasing total interest, and borrowing near the affordability limit leaves less room for repairs or rate changes. Keep this evidence with the working: New property valuation. Confirm the current position at Bank of England data — Bank Rate.asp.
How do I ask for a written porting illustration?
Next steps for Mortgage Porting Guide
- Submit the next action: ask for a written porting illustration. Link the response to Leila Iqbal’s dated Mortgage Porting Guide working.
- Recheck the next action: compare porting with paying the charge and taking a wholly new deal. Link the response to Leila Iqbal’s dated Mortgage Porting Guide working.
- Download the next action: coordinate sale and purchase dates with the lender and solicitor. Link the response to Leila Iqbal’s dated Mortgage Porting Guide working.
The final check is whether the response actually answers the exact decision described by Mortgage Porting Guide, including the governing rule, evidence and practical next step. If it does not, preserve the timeline and escalate through Financial Conduct Authority guidance — Mortgages.
Frequently asked questions
Is mortgage porting guide an official decision?
No. This page explains the method and next steps, but only the relevant authority, provider or regulated adviser can make a binding or personalised decision.
Which date do the rules apply to?
The page is labelled for the 2026/27 tax year where tax-year rules apply and shows a last-updated and next-review date.
What should I do if my circumstances are unusual?
Use the linked official guidance and obtain suitable professional or free impartial help before acting on a material decision.
Related calculator
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Sources
Author and review
Author: FinanceHub UK Editorial Team — Editorial. Editorial policy.
Reviewed by role: Qualified mortgage adviser and FCA compliance reviewer. Named qualified reviewer sign-off is pending before production.
Review record date: 2026-07-10. Next review due: 2027-07-10.