Ribā (interest) is among the gravest prohibitions in Islam, and the texts regarding it are very severe. Allah says: “Allah has permitted trade and forbidden ribā.” (2:275). The Prophet ﷺ not only prohibited consuming ribā but also extended the warning to those involved in facilitating it. He said: “Allah has cursed the one who consumes ribā, the one who pays it, the one who records it, and the two who witness it,” and he said, “they are all the same.” (Muslim).

Based on this, the scholars have discussed employment in institutions whose primary operations are built on ribā, such as conventional banks. The majority of contemporary scholars hold that working in such institutions is not permissible when the work directly involves writing, processing, assisting, or supporting interest-based transactions, even if one is not personally charging the interest. This is because it falls under assisting in what is prohibited. Allah says: “And do not assist one another in sin and transgression.” (5:2).

With respect to a bank teller specifically, while the role may appear limited to deposits and withdrawals, in practice, it is part of the overall operational system of the bank, which is fundamentally based on interest. The teller’s role facilitates the functioning of accounts that are often linked to interest-bearing structures. For this reason, many scholars consider such a role to fall under indirect assistance to ribā-based operations.

However, some scholars have made a distinction in cases where the role is clearly separated from interest-based contracts, such as purely administrative or custodial roles, especially when a person has limited alternatives. Even then, they emphasize that one should strive to move toward a fully permissible source of income as soon as reasonably possible.

Accordingly, the stronger and more cautious opinion is that working as a teller in a conventional interest-based bank should be avoided, as it involves assisting in a system built upon ribā, even if indirectly.

If you have other halal opportunities available, it is better to pursue them. If you are in a situation of genuine need and no immediate alternative exists, some scholars allow temporary employment while actively seeking a permissible alternative, without becoming settled or comfortable in that role.

The Prophet ﷺ said: “Whoever leaves something for the sake of Allah, Allah will replace it with something better.” (Ahmad).