Accruing late payment interest for the year 2023

Hi, My self-assessment on Gateway was 0-nil to pay untill I submitted SA 2023 on 30 January 2024, payment £X was made on 31 January 2024. Although payment was made on time, it takes 7 days to show on the account balanace. Now, there is still £X payment + £40 interested accruded for the following reasons; a) Accruing late payment interest for second payment on account due 31 Jul 2023 b) Accruing late payment interest for first payment on account due 31 Jan 2023 I wonder if these interests have been accruded since the original payment has not gone through to HRMC yet. If now, what is the explanation for this interest payment?

Hi,

If you had payments on account for 2022 to 2023 then these payments were due 31 January 2023 and 31 July 2023.

It could be that you reduced the payments on account to nil and when you filed the 2022 to 2023 tax return a balance was due the payments on account are reintroduced with the original payment dates so interest would then be charged.

To review the interest charges you would need to contact our self assessment team.

Self Assessment: general enquiries

Thank you.