A Friend of mine was in church last week and had an argument with the pastor because she asked if the monthly 10% tithe that she gives to the church should be 10% of her income before tax is deducted or after. She earns £2000 per month and takes home £1600 after income tax. She was giving £160 pm to the church, but the pastor says she should be giving £200 which made her feel very upset . She then challenged the pastor to justify this considering that the church does not have to pay taxes. He insisted that she should give the full £200 willingly and not question God's word.
Who is right in this matter and how much do you tithe?