Dr. Monzer Kahf, a prominent economist and counselor states: “Entering in an interest-potential contract without being exactly definite about not falling in the possibility of going through interest is itself Haram. Also paying interest is an added Haram! There is no Kaffarah for the sin of Riba in Shari’ah, that doesn’t mean it is not a very big sin. There is no Kaffarah for the sin of being rude to one’s parents also yet the Prophet, pbuh, mentioned that it is one of the most grave sins one may commit. The general Kaffarah for sins is what is mentioned in the Qur’an: true and sincere repentance, with Istighfar [asking God for forgiveness]. The Qur’an also mentioned charity and making good deeds/actions as the good deeds take away bad ones.”