Speaking Wednesday to reporters on the sidelines of a weekly cabinet session in Tehran, Seif said the Central Bank holds $23 billion in frozen assets in Japan, South Korea and the United Arab Emirates.
He noted that another $6 billion earned by the sale of oil is kept in India, saying it will be released following the removal of anti-Iran sanctions.
Seif further added that the Central Bank of Iran had $5 billion in foreign debt.
His comments came after Iran and the Group 5+1 (Russia, China, the US, Britain, France and Germany) concluded more than two weeks of intensive talks over Tehran's nuclear program in Vienna.
The negotiating parties on Tuesday reached a conclusion over the text of a comprehensive 159-page deal on the nuclear issue after 22 months of talks.
Experts believe that Iran's economic growth would rise remarkably after a final nuclear deal takes effect.
The comprehensive nuclear deal and subsequent termination of anti-Iran sanctions would also result in a hike in Iran's trade with the world and increase foreign investment in the country.