A lot of churches do not practice Biblical tithing. The tithes is the Lord’s and we have no right doing with it as we please. It is God’s money.
Leviticus 27:30. And all the tithe of the land, whether of the seed of the land, or of the fruit of the tree, is the Lord’s: it is holy unto the Lord.
Malachi 3:8. Will a man rob God? Yet ye have robbed me. But ye say, Wherein have we robbed thee? In tithes and offerings.