Methods: During a three day meeting a group of specialists discussed compliance, what it represents, how it can be measured and if it is clinically relevant.Results: Bladder compliance is the result of a mathematical calculation of volume responsible for 1 cm H2O pressure rise measured during a cystometric filling. It gives an indication on how the different mechanisms in the bladder wall react on stretching. There is a need of standardisation of measurement and suggestions for this are given in the text. Pitfalls are described and how to avoid them. There is a wide range of compliance values in healthy volunteers and groups of patients. Poor compliance needs to be defined better as it can have significant clinical consequences. Prevention and treatment are discussed.Conclusion: If compliance is correctly measured and interpreted, it has importance in urodynamic testing and gives information relevant for clinical management.