Is it permissible to deposit an inherited sum of money into an interest-bearing bank account, knowing that depositing it into a current account without interest would lead to an annual deduction that reduces the original amount, and the heir has no other money besides this?

It is impermissible to deposit money in an interest-based bank, even without interest, because the bank uses these funds in its illicit transactions. However, if one fears theft or loss of money, then there is no harm in depositing it in an interest-based bank under this excuse, provided that it is in a current account without usurious interest. The fact that the amount decreases due to the aforementioned deduction as a bank fee does not justify consuming usury, for the consumer of usury is the one who receives the interest.