PAYMENTS ON ACCOUNT

Hi, I am retired but have considerable income from savings I must declare to hmrc. Having completed my 2022-23 tax return, hmrc give me my bill for 2022-23 and set out two equal payments on account for the 2023- 2024 savings interest - one to be made in Jajuary 2024 and the second in June 2024. Since I will not know EXACTLY what half my 2023-24 savings interest will be in January 2024, as the banks will not/cannot tell me, how do I make the payments on account for 2023-4 savings interest? Do I 1. Simply make the POAs hmrc have suggested? 2. Make the January 2024 payment as hmrc have suggested and adjust the second payment so that my full 2023-4 savings interest liability is covered? 3. Do I estimate the January POA so that, as far as possible, it equals half my liability on my 2023-4 savings interest and then pay the exact balance in the second POA? I should add that I am expecting my 2023-4 savings interest liability to be more than my 2022-3 savings interest liability already charged by hmrc. Thank you for your help. Kind Regards Digga100

Hi Digga100,
Please refer to:
Understand your Self Assessment tax bill
Thank you.