Is it permissible to temporarily open a bank account with interest to transfer funds, with the intention of closing it and withdrawing only the principal once it becomes possible to open a business account free of interest?

It is not permissible to deal with usurious banks unless there is a legitimate need. If a person is compelled to open an account in a usurious bank, and the choice is between a commercial account with a high fee (large discount) or an account with usurious interest, then the lesser of two evils is the interest-bearing account, provided that one does not take the interest for oneself but disposes of it by putting it towards charitable causes. This is because the commercial account yields greater benefit to the usurious bank, which is a greater evil.