Christians are asked, rightly so, to tithe, it is Biblical. Before stating the amount of the Biblical New Testament tithe from Scripture, I want to share why the common traditional amount of ten percent is taught, which is justifiable, yet not Biblical. Much is said to show this traditional amount as the correct amount required by the Bible. This is rooted in the pre-law example of Abraham's gift to Melchizedek of one tenth of the spoils of Abraham's victory in battle. The verses supporting such are below.
Gen 14:18-20 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God. And he blessed him, and said, Blessed be Abram of the most high God, possessor of heaven and earth: And blessed be the most high God, which hath delivered thine enemies into thy hand. And he gave him tithes of all.
Heb 7:2-4 To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace; Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually. Now consider how great this man was, unto whom even the patriarch Abraham gave the tenth of the spoils.
From these verses we know the amount Abraham gave was ten percent of his increase or spoil and it was before the law, therefore it is taught as the traditional Biblical tithe. I was taught this growing up as well as it being taught today, yet it is not Scriptural! We are to follow the Bible, not tradition:
Matt 15:3 But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
Mat 15:6 And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition.
Mar 7:8-9 For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do. And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition.
Col 2:8 Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.
Additionally one can give above their tithe as an offering. This is rooted in the law of Moses. There is nothing wrong with giving above our tithes as offerings. After all, everything is God's anyway and He is the one who allows us to make our increase Therefore whatever we give back to Him is technically only giving back to God what He has already given to us!
To persuade us to be faithful with our tithes, which is Biblical, many encourage us to give by showing us in Scripture, God will give back to us in a greater amount. While the principle is absolutely true, it is completely unbiblical to manipulate people and/or tell them to try and manipulate God! To give with an impure motive, undoes any blessing God would give us. God looks at our hidden heart and knows our motives (Psa 44:21 Shall not God search this out? for he knoweth the secrets of the heart.); if we give for selfish reasons or to increase our portfolio, it is sin! It's that simple. (2Ti 3:2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,) AND (1Ti 6:10 For the love of money is the root of all evil: which while some coveted after, they have erred from the faith, and pierced themselves through with many sorrows).
God does tell us we can test Him regarding our tithes (Mal 3:10 Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith, saith the LORD of hosts, if I will not open you the windows of heaven, and pour you out a blessing, that there shall not be room enough to receive it.). The Hebrew word “bâchan” (baw-khan') translated “prove” in English means to test. God is saying be faithful and tithe, as I have commanded you, and I will take care of you! In all other ways we are not to test God (Mat 4:7 Jesus said unto him, It is written again, Thou shalt not tempt the Lord thy God.). The Greek word “ekpeirazō” (ek-pi-rad'-zo) translated in English as “tempt” means to test. Does this guarantee a financial blessing? NO. God can bless anyone any way He sees fit.
Lastly, I stated I would share the correct Biblical tithe for believers of the New Covenant. Tithe is to be given on a regular basis; the amount is related to how God has increased your finances, which can be a percentage of the increase as a whole OR the more God blesses you with, the more you give; give it with cheerfulness; the amount is determined between you and God, not tradition. See the verses below:
1Co 16:2 Upon the first day of the week let every one of you lay by him in store, as God hath prospered him, that there be no gatherings when I come.
2Co 9:6-7 But this I say, He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully. (7) Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.
How can we give cheerfully? We know we are obeying God's command to give and the amount is determined, not by tradition, rather between you and God, whether you give one percent or one hundred percent or somewhere in between. As a bonus, we know God will bless us (money or otherwise), as He has promised, as we obey and according to how much we give, yet this cannot be our motive as stated prior. It's just a Biblical fact.
Now it's up to you. Go to God and ask Him what you are to give. There's nothing wrong with ten percent, we have a historical example of such, as long as you are giving it because God told you to and not because of tradition. Maybe that is how much you should give until you are clear about how much God wants you to give. Either way, give tithe, which is Biblical, faithfully and cheerfully! It's that simple.