In Germany a comprehensive research program on UHPC is currently in progress covering a wide range of topics related to this material. This paper presents the available knowledge on the time-dependent behaviour of UHPC laying main emphasis on the summarized results of four related projects which are part of this research program. The experimental programs cover classical creep and shrinkage tests giving a comprehensive overview of load-dependent and load-independent strain development. With reference to serviceability and durability, the crack risk of UHPC due to restrained shrinkage deformations, e.g. measured in restrained ring tests or stress testing machines is investigated as well as measures to prevent concrete damage by an internal curing with super absorbent polymers (SAP).