This is a list of the significant events to occur at the club during the 2012–13 season, presented in chronological order.

Source: Cardiff City FC Supplier: PumaSponsor(s): Malaysia Last updated: 11 September 2012.Source: Historical Football Kit – NPower Championship 2012–13

[33] 3Although officially undisclosed, Zlatko Zahovič, director of Maribor confirmed the fee to be around €2 million (£1,573,373), a record in Slovenian football.

[16] 5Although officially undisclosed South Wales Echo reported the fee to be £300,000.

[36] 1Both sides published the fee as undisclosed, but BBC Sport reported the transfer to be worth £350,000.