Do we have to give (tithe) 10% of our money?

A new building campaign or end of the year giving or just weekly guilt. Give, give, give. And oh yeah, it better be at least “ten percent” because the Bible says, right? Wrong. In the Old Testament, the Israelites gave a tithe of around 20 percent, not just ten percent. And, it was never money. It was seed, food, and flocks given to the priests in order to support their work in the temple. The tithe is an Old Covenant principle that was for supporting the priests and Levites. It is not a new covenant principle. 
I’m not saying giving isn’t biblical. It is. I’m saying giving a required ten percent or “tithe” is not what the new covenant teaches. 
Instead, in the New Testament, nowhere is a percentage or “tithe” mentioned when commands to give are found. Rather, Paul says in 2 Corinthians 9:7, “Each one must do just as he has purposed in his heart, not grudgingly or under compulsion, for God loves a cheerful giver.” I love this. You can give from the heart. Remember, it’s not wicked anymore. And we don’t need to feel pressure when we give. 
So next time you hear “You can’t out-give God” or “If you have a need, plant a seed” or whatever popular jargon they say, reject it. Give from your heart. God promises to meet your needs because He loves you, not because you give a certain amount of your income (Phil 4:19).  
While many churches also teach that we should give in order to get blessed, this is a subtle form of the prosperity gospel and should be rejected. We’ve already been blessed with every spiritual blessing (Eph. 1:3). So, we give because we want to support those who preach the gospel (Matt. 10:10; Luke 10:7; 1 Cor. 9:6–14; 1 Tim. 5:17–18). We give to the poor and those in need (1 Tim. 6:17–19; Acts 2:43–47; 4:32–37; 11:27–30; Gal. 2:10; 1 Cor. 16:1–4; 2 Cor. 8:1–9:15). But we don’t give to be blessed.