Jesus died to pay the penalty for all of our sins (Romans 5:8). Isaiah 53:5 declares, “But He was pierced for our transgressions, He was crushed for our iniquities; the punishment that brought us peace was upon Him, and by His wounds we are healed.” Jesus suffered for our sins so that we could be delivered from suffering. To say that we must also suffer for our sins is to say that Jesus’ suffering was insufficient. To say that we must atone for our sins by cleansing in Purgatory is to deny the sufficiency of the atoning sacrifice of Jesus (1 John 2:2). The idea that we have to suffer for our sins after death is contrary to everything the Bible says about salvation.
https://www.gotquestions.org/purgatory.html