Apparatus, methods, and computer program products for SCS RO alignment are provided. An example method includes transmitting, to a base station, a physical random access channel (PRACH) preamble in one RACH occasion (RO) in a first set of ROs in one or more PRACH slots associated with a first subcarrier spacing (SCS), the one or more PRACH slots being within a duration defined based on a PRACH slots time duration for a second subcarrier spacing (SCS). The example method further includes receiving, from the base station, a PRACH response.