Methods, systems, and devices for wireless communication are described for SPS for low-latency communications. A wireless communication device may establish a block of semi-persistent scheduling (SPS) resources in each of a plurality of transmission time intervals (TTIs) for transmission of priority traffic, and determine that a level of priority traffic to transmit during a first TTI of the plurality of TTIs is below a priority traffic threshold. The wireless communication device may transmit a per-TTI release signal to indicate that the block of SPS resources in the first TTI is released from being reserved for priority traffic.