Is it permissible to take a loan from a commercial bank whose regulations stipulate the arrangement of interest after eighteen months, with the intention of repaying it before then, for the purpose of buying something and selling it to make a profit?

It is not permissible to borrow from the bank with the aforementioned contract due to its inclusion of an interest-based condition, even if you intend to repay the amount within the period that does not require you to pay interest. This is because it is not permissible to enter into a contract that stipulates or approves such a condition.