Championship   M. W D L goals
  at home 17 8 6 3 30 : 17
  Away 17 5 5 7 20 : 27
  34 13 11 10 50 : 44
FA Cup   M. W D L goals
  at home 2 0 2 0 2 : 2
  Away 6 2 2 2 8 : 11
  8 2 4 2 10 : 13
League Cup   M. W D L goals
  Away 2 0 0 2 2 : 10
  2 0 0 2 2 : 10
League One   M. W D L goals
  at home 2 0 0 2 1 : 3
  Away 2 0 1 1 2 : 3
  4 0 1 3 3 : 6
Playoffs   M. W D L goals
  at home 1 0 1 0 0 : 0
  Away 1 1 0 0 3 : 0
  2 1 1 0 3 : 0
overall   M. W D L goals
  at home 22 8 9 5 33 : 22
  Away 28 8 8 12 35 : 51
  Neutral Place 0 0 0 0 0 : 0
  50 16 17 17 68 : 73
Championship
2022/2023 33. Round Cardiff City - Reading FC 1:0 (0:0)
2022/2023 2. Round Reading FC - Cardiff City 2:1 (1:1)
2021/2022 41. Round Reading FC - Cardiff City 1:2 (1:0)
2021/2022 11. Round Cardiff City - Reading FC 0:1 (0:1)
2020/2021 42. Round Reading FC - Cardiff City 1:1 (0:0)
2020/2021 3. Round Cardiff City - Reading FC 1:2 (0:0)
2019/2020 30. Round Cardiff City - Reading FC 1:1 (0:1)
2019/2020 3. Round Reading FC - Cardiff City 3:0 (2:0)
2017/2018 46. Round Cardiff City - Reading FC 0:0 (0:0)
2017/2018 21. Round Reading FC - Cardiff City 2:2 (2:0)
2016/2017 28. Round Reading FC - Cardiff City 2:1 (1:1)
2016/2017 5. Round Cardiff City - Reading FC 0:1 (0:0)
2015/2016 38. Round Reading FC - Cardiff City 1:1 (1:0)
2015/2016 16. Round Cardiff City - Reading FC 2:0 (1:0)
2014/2015 40. Round Reading FC - Cardiff City 1:1 (1:0)
2014/2015 18. Round Cardiff City - Reading FC 2:1 (2:0)
2011/2012 25. Round Cardiff City - Reading FC 3:1 (3:1)
2011/2012 17. Round Reading FC - Cardiff City 1:2 (0:1)
2010/2011 29. Round Cardiff City - Reading FC 2:2 (0:1)
2010/2011 16. Round Reading FC - Cardiff City 1:1 (1:0)
2009/2010 43. Round Cardiff City - Reading FC 0:0 (0:0)
2009/2010 7. Round Reading FC - Cardiff City 0:1 (0:0)
2008/2009 25. Round Reading FC - Cardiff City 1:1 (0:0)
2008/2009 19. Round Cardiff City - Reading FC 2:2 (2:1)
2005/2006 42. Round Cardiff City - Reading FC 2:5 (0:2)
2005/2006 28. Round Reading FC - Cardiff City 5:1 (2:0)
2004/2005 44. Round Cardiff City - Reading FC 2:0 (2:0)
2004/2005 19. Round Reading FC - Cardiff City 2:1 (2:0)
2003/2004 37. Round Cardiff City - Reading FC 2:3 (1:2)
2003/2004 8. Round Reading FC - Cardiff City 2:1 (0:1)
1930/1931 8. Round Reading FC - Cardiff City 3:0
1930/1931 4. Round Cardiff City - Reading FC 5:0
1929/1930 9. Round Reading FC - Cardiff City 2:0
1929/1930 9. Round Cardiff City - Reading FC 2:1
FA Cup
2019/2020 4. Round Cardiff City - Reading FC 1:4 (1:0, 2:2, 3:3) pso
2019/2020 4. Round Reading FC - Cardiff City 1:1 (1:1)
2014/2015 4. Round Cardiff City - Reading FC 1:2 (1:0)
2008/2009 3. Round Cardiff City - Reading FC 2:0 (0:0)
1997/1998 4. Round Reading FC - Cardiff City 4:3 (0:1, 1:1, 1:1) pso
1997/1998 4. Round Cardiff City - Reading FC 1:1 (0:0)
1934/1935 1. Round Cardiff City - Reading FC 1:2
1926/1927 Semi-finals Cardiff City - Reading FC 3:0
League Cup
1965/1966 Round of 16 Cardiff City - Reading FC 5:1
1962/1963 2. Round Cardiff City - Reading FC 5:1
League One
2001/2002 24. Round Cardiff City - Reading FC 2:2 (1:0)
2001/2002 6. Round Reading FC - Cardiff City 1:2 (1:2)
1999/2000 39. Round Reading FC - Cardiff City 0:1
1999/2000 23. Round Cardiff City - Reading FC 1:0
Playoffs
2010/2011 Championship Semi-finals Cardiff City - Reading FC 0:3 (0:2)
2010/2011 Championship Semi-finals Reading FC - Cardiff City 0:0 (0:0)

For games that were decided on penalties the score after 120 minutes will be included in the ranking