This follows on to the Old Testament practice, but isn’t something actually commanded in the New Testament. All New Testament giving is free will. Many churchgoers feel 10% is a fair amount to share with their church. Some give more, even a lot more. Some give less. It ought to be a private thing between you and God, and maybe the financial stewards at your church (who are sworn to silence) and the IRS (who are also sworn to silence). This privacy does become a pickle if one has been deducting from Caesar then becomes a political candidate.
Is tithing supposed to be 10 percent of what you have left after government has taken its share? Or is it 10 percent of your gross - before government lays into you?
Why do CHRISTIANs seem to NOT know what is in ACTS, the 15th chapter???
5 Then some of the believers who belonged to the party of the Pharisees stood up and said, The Gentiles must be circumcised and required to keep the law of Moses.
6 The apostles and elders met to consider this question. 7 After much discussion, Peter got up and addressed them: Brothers, you know that some time ago God made a choice among you that the Gentiles might hear from my lips the message of the gospel and believe. 8 God, who knows the heart, showed that he accepted them by giving the Holy Spirit to them, just as he did to us. 9 He did not discriminate between us and them, for he purified their hearts by faith. 10 Now then, why do you try to test God by putting on the necks of Gentiles a yoke that neither we nor our ancestors have been able to bear? 11 No! We believe it is through the grace of our Lord Jesus that we are saved, just as they are.
12 The whole assembly became silent as they listened to Barnabas and Paul telling about the signs and wonders God had done among the Gentiles through them. 13 When they finished, James spoke up. Brothers, he said, listen to me. 14 Simon[a] has described to us how God first intervened to choose a people for his name from the Gentiles. 15 The words of the prophets are in agreement with this, as it is written:
16 After this I will return
and rebuild Davids fallen tent.
Its ruins I will rebuild,
and I will restore it,
17 that the rest of mankind may seek the Lord,
even all the Gentiles who bear my name,
says the Lord, who does these things[b]
18 things known from long ago.[c]
19 It is my judgment, therefore, that we should not make it difficult for the Gentiles who are turning to God. 20 Instead we should write to them, telling them to abstain from food polluted by idols, from sexual immorality, from the meat of strangled animals and from blood. 21 For the law of Moses has been preached in every city from the earliest times and is read in the synagogues on every Sabbath.
The apostles and elders, your brothers,
To the Gentile believers in Antioch, Syria and Cilicia:
Greetings.
24 We have heard that some went out from us without our authorization and disturbed you, troubling your minds by what they said. 25 So we all agreed to choose some men and send them to you with our dear friends Barnabas and Paul 26 men who have risked their lives for the name of our Lord Jesus Christ. 27 Therefore we are sending Judas and Silas to confirm by word of mouth what we are writing. 28 It seemed good to the Holy Spirit and to us not to burden you with anything beyond the following requirements: 29 You are to abstain from food sacrificed to idols, from blood, from the meat of strangled animals and from sexual immorality. You will do well to avoid these things.
Farewell.
30 So the men were sent off and went down to Antioch, where they gathered the church together and delivered the letter. 31 The people read it and were glad for its encouraging message. 32 Judas and Silas, who themselves were prophets, said much to encourage and strengthen the believers. 33 After spending some time there, they were sent off by the believers with the blessing of peace to return to those who had sent them. [34] [d] 35 But Paul and Barnabas remained in Antioch, where they and many others taught and preached the word of the Lord.
The financial stewards at most churches have to account for every penny in contributions. To the congregation and to the IRS. Thhey are nit “sworn to secrecy”. If people want to make their donations anonymous, they can specify as such. If you want to put cash in collection plate instead of a check, ut is still counted.
Most Protestant churches are incredibly meticulous & transparent concerning finances.
It’s the Mormons who are secretive and swear oaths to secrecy, which is, in and of itself, a problem.