The idea of an “inactive [church] member” is really a contradiction of terms. So let’s stop pretending about who is part of our churches.
Paul seemed to be clear in his letters to the churches that not only should every believer belong to a local church, but that every one who belongs does so to contribute in an active way.
From Him the whole body, fitted and knit together by every supporting ligament, promotes the growth of the body for building up itself in love by the proper working of each individual part. - Ephesians 4:16 HCSB (Emphasis mine).
To the struggling Corinthian church he wrote
A manifestation of the Spirit is given to each person to produce what is beneficial… - 1 Corinthians 12:7 (My emphasis again).
The historian Luke recorded that those 3,000 on the Day of Pentecost who believed and were baptized became part of the Jerusalem church.
So those who accepted his message were baptized, and that day about 3,000 people were added to them. (Yes, I’m still emphasizing).
Also check Paul’s words to the Roman church in Romans 12:3-10 about using the gifts God gives to benefit the church. An uninvolved “member” really isn’t a member.
Taken from The Replanted Church.