I believe believers will be judged on what they have done, but only to the reward in heaven, because they are not judged to salvation because faith in Christ has saved them from that judgement.
John 5:
24 “Very truly I tell you, whoever hears my word and believes him who sent me has eternal life and will not be judged but has crossed over from death to life. 25 Very truly I tell you, a time is coming and has now come when the dead will hear the voice of the Son of God and those who hear will live. 26 For as the Father has life in himself, so he has granted the Son also to have life in himself. 27 And he has given him authority to judge because he is the Son of Man.
28 “Do not be amazed at this, for a time is coming when all who are in their graves will hear his voice 29 and come out—those who have done what is good will rise to live, and those who have done what is evil will rise to be condemned. 30 By myself I can do nothing; I judge only as I hear, and my judgment is just, for I seek not to please myself but him who sent me.
Verse 28 is interesting because it mirrors Matthew 25:31-. Jesus separates all the nations but refers them to whatever they did or didn't do for His brethren (adelphos) Who are these brethren of His?
46 While Jesus was still talking to the crowd, his mother and brothers (adelphos) stood outside, wanting to speak to him. 47 Someone told him, “Your mother and brothers (adelphos) are standing outside, wanting to speak to you.”
48 He replied to him, “Who is my mother, and who are my brothers (adelphos)?” 49 Pointing to his disciples, he said, “Here are my mother and my brothers (adelphos). 50 For whoever does the will of my Father in heaven is my brother and sister and mother.”
Pointing to His disciples Jesus says these are His brothers (adelphos).