Is zakat to be paid annually on the full amount invested and the money deposited in the bank, or is the amount for which zakat was paid in the previous year to be deducted?

Money is subject to zakat every year. The zakat of the past year does not suffice for the zakat of this year or coming years. All money must be subject to zakat unless it falls below the nisab. Thus, the ten thousand [currency unit] on which zakat was paid last year will be subject to zakat next Ramadan along with its profits, and the money deposited in the bank is to be collected and zakat paid on it.