The Auditor General in a 2018 report indicated that the government had used the Port of Mombasa as security for the Chinese loan used in the construction of the railway line.
Kenya borrowed $3.2 billion (Sh384 billion at today's exchange rate) for the construction of the Mombasa-Nairobi line and $1.5 billion (Sh180 billion) for the Nairobi-Naivasha phase.