Can you give me some more information please.
Can you tell me over how many years you received the interest please. Are you continuing to receive interest?
Would you like me to type my answer before I call you?
OK. I will need a little time.
We are dealing with four years, 2012/13, 2013/14, 2014/15 and 2015/16. The declaration for 2015/16 won't be late until 1 February 2017.
You won't be prosecuted for a first offence of this nature. You will be charged interest in line with the rates here. If you make a disclosure using the Second Incomes Campaign which you can read about here, you will be able to limit the tax based penalty to 10% or 20% of the tax due. Otherwise, you could be liable to a penalty of 100% or 200% of the tax due.
Read the notes carefully and let me know if you have nay further questions.
The wording is vague but it doesn't specifically say that the income has to be earned income, though it does mention employees. If you are a pensioner, then you have an income so you could argue that the interest was a second income.
Paragraph 3.3 says that you should include any income not taxed under PAYE or that you have not declared. See paragraph 3.5 also.
The number you need to call initially is in paragraph 2.1 (0300(###) ###-####. If they tell you that you are not covered by the second incomes campaign, then you need to call the number in paragraph 1.3 (0300(###) ###-####.