Banks in Iran have made progress since the signing of the nuclear deal, yet many obstacles to doing business internationally remain. The deal, formally known as the Joint Comprehensive Plan of Action (JCPOA), was meant to free up Iran’s economy and banking sector by lifting the sanctions imposed on the country in exchange for curbs on Iran’s nuclear programme. Under the nuclear sanctions, the US fined several big banks for dealing with sanctioned countries. For that reason, many large international banks fear being fined again if they re-engage with the country, even though they are now allowed to do so under the terms of the JCPOA. So far, only small banks have been willing to re-engage with Iran.