Praise be to Allaah.
Your working in this bank is haraam, even if you are in a
department which does not deal with riba-based transactions. It is
sufficient to note that the “central bank” is the head bank and working in
the other departments complements the work of the sections that do deal with
riba; the bank is formed from all the departments and all the institutions
connected to it are engaged in riba.
The scholars have stated that it is not permissible to work
even as a guard or driver for such institutions, so how about working as a
teller or clerk?
Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said: It
is not permissible to work in a riba-based institution even if a person is
working as a driver or guard, because that means that he is working for the
riba-based institution, which implies that he approves of it. For whoever
disapproves of a thing would not work to support it, so if he is working for
it that implies that he approves of it, and the one who approves of
something that is haraam is also guilty of sin.
But if he is directly involved in recording transactions,
writing, sending and depositing etc, then he is undoubtedly dealing directly
with something haraam. It was proven in the hadeeth of Jaabir (may Allaah be
pleased with him) that the Prophet (peace and blessings of Allaah be
upon him) cursed the one who consumes riba, the one who pays it, the two who
witness it and the one who writes it down. He said: “They are all the
same.”
Fataawa Islamiyyah. 2/401
The Standing Committee was asked about a man who worked as a
night guard for one of the banks, and he had nothing to do with the bank’s
transactions – should he continue with this job or leave?
They replied:
It is not permissible for a Muslim to work as a guard for
banks that deal with riba, because this is a kind of cooperating in sin and
transgression, and Allaah has forbidden that as He says (interpretation of
the meaning):
“but do not help one another in sin
and transgression”
[al-Maa'idah 5:2]
Most of the banks deal with riba, so you have to look for a
halaal means of earning a living, not this way.
And Allaah is the Source of strength. May Allaah bless our
Prophet Muhammad and his family and companions.
Fataawa Islamiyyah, 2/401, 402
And Allaah knows best.