Level-1 trigger algorithms at CMS for the HL-LHC

In light of the High-Luminosity LHC (HL-LHC), the Compact Muon Solenoid (CMS) experiment is planning to upgrade its trigger system. The Level-1 (L1) trigger will benefit from the addition of tracking information as well as high granularity information from the upgrades of subdetectors. In this report, we present a panel of algorithms to select events containing electrons, photons, jets, missing transverse energy and hadronically-decaying $\tau$ leptons. These algorithms aim to provide a maximum trigger efficiency while keeping the event rate under control. The performance of these algorithms are studied using simulated samples produced choosing a center of mass energy of 14 TeV and an average of 200 collisions per bunch crossing.