The final deal is in line with the $5 billion-$7 billion the U.S. Department of Justice (DOJ) had asked Credit Suisse to pay earlier in negotiations, as reported by Reuters on Monday.
The news came after Deutsche Bank agreed to a $7.2 billion settlement with the DOJ over its sale and pooling of toxic mortgage securities.
The deals highlight the Justice Department’s efforts to hold European banks accountable for shoddy securities that contributed to the U.S. housing market collapse.
The department sued Barclays on Thursday over similar claims.
Credit Suisse had paid a $2.8 billion fine in 2014 for helping wealthy Americans evade tax.
Credit Suisse in November said it had upped litigation provisions by 357 million francs ($348.29 million), mainly in connection with mortgage-related matters.