Will the interest you are getting from a bank account be deducted from the capital itself?

Or is it the product of the capital and won't be deducted from it? Does an account serves as a share to a certain bank you put it into thus makes interests (which can be withdrawn every 3, 6, 9 months - as you preferred it)? I know my question is confusing but please try to understand them.
Will the interest you are getting from a bank account be deducted from the capital itself?
No, the interest will not be deducted from your capital. If you have $100 in your bank account and 5% yearly interest. After one year you will have $105 of capital in your account.
Reply:Not sure what your asking. If you are talking about interest you earned ever 3, 6, 9 months and do you have to claim this as income then the answer is yes. The money you put in you already paid taxes on but the money it earns, interest, you need to pay taxes on this.
Reply:If I understand you correctly, the interest is added to the capital. You can withdraw the interest at your discretion.