Christians are never told to tithe anywhere in the New Testament. Some verses that put this into perspective are as follows; 2 Cor. 9:6-7, Luke 6:38, Matt. 5:42, 1 Tim. 5:8, Acts 20:35, 2 Peter 2:1-3. Many Christians are taught that they must give 10 % to the church and this is not true according to the Bible. This is simply teaching to keep a commandment (a commandment that's not even for us) by the flesh devoid of spiritual understanding.
Firstly, all that a Christian has is already God's so they should be lead to give what they are able for his Glory. The most dangerous thing is that teaching to give 10 % to the Lord implies that the other 90 % is ours which is not true. It is all the Lords and we must give account to him for using it properly.