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Changing mortgage rates before completion

Me and my partner are currently in the process of buying our first home, it’s a new build and we have a competition date of the 28/11/25. 
We have a mortgage in principle with an adverse lender because I have 2 Ccj on my credit file one will be at 6 year on the 9/8/25, the other will be 6 years old on the 16/10/25 and I also have a defaulted account on file from 5/11/25.
We are due to exchange contracts on the 25/8/25 so are currently in the process of applying for the mortgage. The rate I’ve been given is 6.5 fixed for 2 year with current rates it’s looking to cost me an extra £6000 over the short term, but am I right in thinking I can change rates with the same provider once I’ve exchanged contracts as I would assume I’d have a better chance of getting a better rate when these are off my file. I was just going to wait it out until they have gone off my credit file but I’ve been given a great incentive to buy. We can comfortably afford it so we will still be going ahead but would like to see what advice people have thanks everyone.

Comments

  • bump?       
  • ACG
    ACG Posts: 24,852 Forumite
    Part of the Furniture 10,000 Posts Name Dropper I've helped Parliament
    It depends on who the lender is.
    Some lenders need a new application, others might be able to switch the product. 

    Probably worth checking in with your broker. I would not mind my clients checking in with me on this, its part of the job. 
    I am a Mortgage Adviser
    You should note that this site doesn't check my status as a mortgage adviser, so you need to take my word for it. This signature is here as I follow MSE's Mortgage Adviser Code of Conduct. Any posts on here are for information and discussion purposes only and shouldn't be seen as financial advice.
  • ACG said:
    It depends on who the lender is.
    Some lenders need a new application, others might be able to switch the product. 

    Probably worth checking in with your broker. I would not mind my clients checking in with me on this, its part of the job. 
    brilliant ive got a meeting with them later today so ill bring it up then

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