 Initial estimates regarding the cost of the first Yasen-class submarine ranged from US$1 billion to US$2 billion.In 2011, it was reported that the cost of first-of-class, "Severodvinsk", was 50 billion rubles (roughly US$1.6 billion) while the second unit, "Kazan", will cost an estimated 47 billion rubles (US$725 million, in 2019 RUB/USD exchange rate).In 2011, then Defense Minister Anatoliy Serdyukov criticized the ever increasing cost of the Borei and Yasen classes.