The purpose of tithing is to remind us that God is the supplier of everything and it teaches us to always put God first in our lives.
The word "tithe" means tenth or ten percent. Tithing, or giving ten percent of your income isn't merely giving something to God, it's giving back what was His to begin with. All that we have, or hope to have, comes from Him.
May you be blessed abundantly as you give generously and cheerfully with all your heart!