There is no set amount established as a tithe for the church. Even in Old Testament days, tithes were often way more than 10 percent, and were a form of taxes at times.Is Tithing a Law for New Testament Believers?
(1) Remember that tithing pre-dated the Law of Moses. It was not because he was under the Law that Abraham tithed; he tithed because he wanted to honor God and support God’s work as represented by Melchizedek. This is a good example for New Testament believers, because we are children of Abraham by faith (Ro. 4:16-17).
(2) The Old Testament was given for our example (Ro. 15:4; 1 Co. 10:11). Paul used the Mosaic system of giving as authority for his teaching that New Testament believers are obligated to support preachers (1 Co. 9:8-14).
(3) It is the express will of Christ that His people be giving people (Lk. 6:38). Many people I have met who “do not believe in tithing” are stingy. They do not bear their rightful load in the church. Stinginess and tightfistedness should never characterize the child of God. Even if you do not believe that the tithe is a matter of law, you should be ashamed to keep more than 90% of your income for yourself in light of the great needs of God’s work in this present world.
The church is to give freely.
Me personally, I use 10 percent as an average, but some months it could be more, other months less, some months it does not all go to a church but instead, various charities such as the local homeless shelter/mission.