"What does the Bible say about Purgatory?"
Answer: According to the Catholic Encyclopedia, Purgatory is “a place or condition of temporal punishment for those who, departing this life in God's grace, are not entirely free from venial faults, or have not fully paid the satisfaction due to their transgressions.” To summarize, in Catholic theology Purgatory is a place that a Christian’s soul goes to after death to be cleansed of the sins that had not been fully satisfied during life. Is this doctrine of Purgatory in agreement with the Bible? Absolutely not!
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.
The primary Scriptural passage Catholics point to for evidence of Purgatory is 1 Corinthians 3:15, which says, “If it is burned up, he will suffer loss; he himself will be saved, but only as one escaping through the flames.” The passage (1 Corinthians 3:12-15) is using an illustration of things going through fire as a description of believers’ works being judged. If our works are of good quality “gold, sliver, costly stones,” they will pass through the fire unharmed, and we will be rewarded for them. If our works are of poor quality “wood, hay, and straw,” they will be consumed by the fire, and there will be no reward. The passage does not say that believers pass through the fire, but rather that a believer’s works pass through the fire. 1 Corinthians 3:15 refers to the believer “escaping through the flames,” not “being cleansed by the flames.”
Purgatory, like many other Catholic dogmas, is based on a misunderstanding of the nature of Christ’s sacrifice. Catholics view the Mass / Eucharist as a re-presentation of Christ’s sacrifice because they fail to understand that Jesus’ once-for-all sacrifice was absolutely and perfectly sufficient (Hebrews 7:27). Catholics view meritorious works as contributing to salvation due to a failure to recognize that Jesus’ sacrificial payment has no need of additional “contribution” (Ephesians 2:8-9). Similarly, Purgatory is understood by Catholics as a place of cleansing in preparation for heaven because they do not recognize that because of Jesus’ sacrifice, we are already cleansed, declared righteous, forgiven, redeemed, reconciled, and sanctified.
The very idea of Purgatory and the doctrines that are often attached to it (prayer for the dead, indulgences, meritorious works on behalf of the dead, etc.) all fail to recognize that Jesus’ death was sufficient to pay the penalty for ALL of our sins. Jesus, who was God incarnate (John 1:1,14), paid an infinite price for our sin. Jesus died for our sins (1 Corinthians 15:3). Jesus is the atoning sacrifice for our sins (1 John 2:2). To limit Jesus’ sacrifice to atoning for original sin, or sins committed before salvation, is an attack on the Person and Work of Jesus Christ. If we must in any sense pay for, atone for, or suffer because of our sins – that indicates Jesus’ death was not a perfect, complete, and sufficient sacrifice.
For believers, after death is to be "away from the body and at home with the Lord" (2 Corinthians 5:6-8; Philippians 1:23). Notice that this does not say "away from the body, in Purgatory with the cleansing fire." No, because of the perfection, completion, and sufficiency of Jesus' sacrifice, we are immediately in the Lord's presence after death, fully cleansed, free from sin, glorified, perfected, and ultimately sanctified.