We’d like to remind Forumites to please avoid political debate on the Forum.

This is to keep it a safe and useful space for MoneySaving discussions. Threads that are – or become – political in nature may be removed in line with the Forum’s rules. Thank you for your understanding.

📨 Have you signed up to the Forum's new Email Digest yet? Get a selection of trending threads sent straight to your inbox daily, weekly or monthly!

Tax Confusion

Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

Thanks
«1345

Comments

  • QrizB
    QrizB Posts: 25,131
    10,000 Posts Fifth Anniversary Photogenic Name Dropper
    Forumite
    himonster said:
    Is this because they are guessing the interest I may earn 2025 - 2026?
    Yes.
    himonster said:
    If so, can I stop that as I would prefer to pay it in a lump sum.
    No...

    N. Hampshire, he/him. Octopus Intelligent Go elec / Fuse gas / Vodafone BB / iD mobile. Kirk Hill Co-op member.
    2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 37 MWh generated, long-term average 2.6 Os.
    Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs, Ecoflow Stream, Best kettle :-)
  • himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
  • himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
    They are overestimating though. My savings amount has changed so I work out I will only owe around £75, not £150. This is due to using an ISA back in April.

    I'm a bit annoyed I'll be overpaying as well as them taking the amount they think it will be over 4 months. How and when you would I get an overpayment back?
  • Dazed_and_C0nfused
    Dazed_and_C0nfused Posts: 19,529
    10,000 Posts Sixth Anniversary Name Dropper
    Forumite
    edited 15 December 2025 at 12:22PM
    himonster said:
    himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
    They are overestimating though. My savings amount has changed so I work out I will only owe around £75, not £150. This is due to using an ISA back in April.

    I'm a bit annoyed I'll be overpaying as well as them taking the amount they think it will be over 4 months. How and when you would I get an overpayment back?
    You could just provide your own estimate (for each bank account, not a single total) and ask them to issue the new tax code on a cumulative basis.

    That means you will have paid the £75 back next time you get paid (after the next new tax code is issued).
  • himonster said:
    himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
    They are overestimating though. My savings amount has changed so I work out I will only owe around £75, not £150. This is due to using an ISA back in April.

    I'm a bit annoyed I'll be overpaying as well as them taking the amount they think it will be over 4 months. How and when you would I get an overpayment back?
    You could just provide your own estimate (for each bank account, not a single total) and ask them to issue the new tax code on a cumulative basis.

    That means you will have paid the £75 back next time you get paid (after the next new tax code is issued).
    How would I do that? I spent 50 mins on hold to them earlier and gave up.

    In April, they'll change the tax code again, predicting what I will earn over a year and it won't be correct, so again would I need to contact them to tell them?
  • himonster said:
    himonster said:
    himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
    They are overestimating though. My savings amount has changed so I work out I will only owe around £75, not £150. This is due to using an ISA back in April.

    I'm a bit annoyed I'll be overpaying as well as them taking the amount they think it will be over 4 months. How and when you would I get an overpayment back?
    You could just provide your own estimate (for each bank account, not a single total) and ask them to issue the new tax code on a cumulative basis.

    That means you will have paid the £75 back next time you get paid (after the next new tax code is issued).
    How would I do that? I spent 50 mins on hold to them earlier and gave up.

    In April, they'll change the tax code again, predicting what I will earn over a year and it won't be correct, so again would I need to contact them to tell them?
    It would be a phone call yes.

    But I think if you provide an update for this year (2025/26) then they would normally use that as well for 2026/27 (to start with anyway).
  • himonster said:
    himonster said:
    himonster said:
    Hi, I received a letter last month from HMRC stating I owed £250 in tax from 2024 - 2025. This does work out to be correct from interest I have earned on savings. I paid it straight away to avoid a tax code change.

    However, HMRC have sent me another letter via a tax code change for the 2025 - 2026 tax year saying they are changing my tax code to have an X on the end and state they predict I will owe them around £150 and will collect this each month until April 2026.

    Is this because they are guessing the interest I may earn 2025 - 2026? If so, can I stop that as I would prefer to pay it in a lump sum.

    Thanks
    Yes, it won't be to collect the £250 from 2024/25.

    You could ask for a cumulative tax code to be issued for 2025/26 and then whatever the (estimated) amount you owe for this tax year will be deducted next time you are paid, all in one go.
    They are overestimating though. My savings amount has changed so I work out I will only owe around £75, not £150. This is due to using an ISA back in April.

    I'm a bit annoyed I'll be overpaying as well as them taking the amount they think it will be over 4 months. How and when you would I get an overpayment back?
    You could just provide your own estimate (for each bank account, not a single total) and ask them to issue the new tax code on a cumulative basis.

    That means you will have paid the £75 back next time you get paid (after the next new tax code is issued).
    How would I do that? I spent 50 mins on hold to them earlier and gave up.

    In April, they'll change the tax code again, predicting what I will earn over a year and it won't be correct, so again would I need to contact them to tell them?
    It would be a phone call yes.

    But I think if you provide an update for this year (2025/26) then they would normally use that as well for 2026/27 (to start with anyway).
    Thanks and would I then contact them again to explain my estimate?
  • Albermarle
    Albermarle Posts: 32,780
    Eighth Anniversary 10,000 Posts Name Dropper
    Forumite
    You can change your estimated interest in your online personal tax account. Much quicker than hanging on the phone.
  • You can change your estimated interest in your online personal tax account. Much quicker than hanging on the phone.
    Can you? How do you do that please?

  • Got through after an hour and 10 minutes, told them my estimated which was £1200 and then got cut off!
    Looked in the app and they changed my tax code and there's a figure of £200, and not £1200... is that right?
★ ★ ★ Meet your Ambassadors

🚀 Getting Started

Hi new member!

Our Getting Started Guide will help you get the most out of the Forum

Categories

  • All Categories
  • 355.8K Banking & Borrowing
  • 254.9K Reduce Debt & Boost Income
  • 456.2K Spending & Discounts
  • 248.3K Work, Benefits & Business
  • 605.9K Mortgages, Homes & Bills
  • 179K Life & Family
  • 263.7K Travel & Transport
  • 1.5M Hobbies & Leisure
  • 16.2K Discuss & Feedback
  • 37.7K Read-Only Boards

Is this how you want to be seen?

We see you are using a default avatar. It takes only a few seconds to pick a picture.