Remortgaging

How does remortgaging work?

Remortgaging is basically replacing your current mortgage with a new deal, either with your existing lender or a new one. This guide explains when it’s worth doing, what you need to prepare, the steps from research to completion, the fees to watch for, and how to avoid common mistakes that cost people money.

Will Sharman

Feb 9, 2026

Remortgaging is one of those things people put off, then suddenly they’re dumped onto a higher rate and wondering why the monthly payment jumped. If you understand the process, you can time it properly, avoid nasty fees, and often put yourself in a stronger position.

What is a remortgage?

A remortgage is when you replace your current mortgage with a new one on the same property.

That can mean:

  • Switching to a new lender, or
  • Taking a new deal with your current lender (often called a “product transfer”)

People usually remortgage to get a better rate, change their fixed period, change the mortgage term, or borrow extra for things like home improvements.

Is it time to remortgage?

Remortgaging is usually worth looking at if any of these apply:

  • Your fixed rate is ending soon and you’re about to move onto the lender’s standard variable rate (SVR), which is often higher.
  • Your home value has increased, which may improve your loan-to-value (LTV) and open up better pricing.
  • You want to change your mortgage setup, for example moving from variable to fixed for stability, or adjusting the term.
  • You need to borrow more (home improvements, paying off other borrowing, major costs). This needs careful thinking because you’re spreading debt over a long period, secured against your home.
  • Your circumstances changed, job, income, household, childcare costs, or future plans, and your current deal no longer suits you.

A simple rule: if you’re within around 3 to 6 months of your deal ending, you should be reviewing options. Starting early gives you time to shop around without panic.

Get ready to remortgage

Before you apply for anything, get your basics straight. This is where most people mess it up.

1) Check your current mortgage details

  • Current balance
  • Remaining term
  • Current rate and when the deal ends

2) Look for fees that can wipe out the “saving”

  • Early Repayment Charge (ERC), if you leave before the deal ends
  • Exit fee (some lenders charge this when you close the mortgage)

If your ERC is big, switching early might be pointless unless the new deal saves enough to beat the fee.

3) Work out your loan-to-value (LTV)
You’ll need an estimate of your property value. You can sanity-check it using online estimates, recent local sales, or an estate agent’s view. Your lender will still do their own valuation later.

4) Tidy up your credit file
Even small issues can cause delays, wrong addresses, old accounts, missed payments showing in error. Fix what you can before you apply.

5) Decide what you actually want
Lowest rate is not always best if it comes with big fees or locks you in when you might need flexibility.

How the remortgage process works

Here’s the process in plain English.

Step 1: Compare options

You look at deals from your existing lender and other lenders, based on:

  • Your mortgage balance
  • Your LTV
  • Income and commitments
  • Your goals (lower payment, stability, borrowing more, shorter term)

Step 2: Agreement in Principle (if needed)

Some lenders will use an Agreement in Principle (AIP) or Decision in Principle (DIP) stage. It’s an initial check to see if they’re likely to lend to you, based on the info you provide.

It helps you avoid wasting time on a lender that was never going to accept the case.

Step 3: Full mortgage application

You provide documents and the lender runs the proper checks. Commonly:

  • ID and address history
  • Proof of income (payslips, accounts if self-employed)
  • Bank statements
  • Details of debts and ongoing commitments
  • Current mortgage details

Step 4: Valuation

The lender will value the property to confirm it supports the loan amount. Sometimes it’s a desktop valuation, sometimes they send a valuer.

Step 5: Offer issued

If everything checks out, you receive a mortgage offer.

Step 6: Legal work and completion

A solicitor or conveyancer handles the legal side of switching the charge from your old lender to the new one. Once complete:

  • The new mortgage pays off the old mortgage
  • Your new deal starts
  • Your payment and rate change from the completion date

How long does it take? Commonly 4 to 8 weeks, but it can be quicker for simple cases, and longer if there are income complications, property issues, or paperwork delays.

Remortgaging with us

If you want help, we can run the numbers properly, not just “rate shopping”.

What we do:

  • Check your current deal, ERCs, and timings
  • Compare options across lenders where appropriate
  • Sense-check whether switching actually saves money after fees
  • Manage the admin, chasing, and problem-solving so it completes cleanly

If you’re looking at a remortgage, start here:

Mortgage calculators

If you want a quick sense-check on affordability and payments:

Agreement in Principle

If you’re also house-hunting and want to understand what you can borrow first, an AIP can help you avoid wasting time on unrealistic price ranges.

Important information

Your home may be repossessed if you do not keep up repayments on your mortgage.

Remortgaging can reduce monthly payments, but it can also increase the total cost over time, especially if you extend the term or borrow extra. Always look at the full picture, not just the headline rate.

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Speak to a mortgage adviser

If you’re buying, moving, or remortgaging, speak with a MBNM adviser and get clear guidance on what’s realistically available to you, before you commit to anything.

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