I would never ask "how much." Remember Mark 12:42-43,
and,
Matthew 6 5. And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
and,
James 2:14. What use is it, my brethren, if someone says he has faith but he has no works? Can that faith save him?
15. If a brother or sister is without clothing and in need of daily food,
16. and one of you says to them, "Go in peace, be warmed and be filled," and yet you do not give them what is necessary for their body, what use is that?
17. Even so faith, if it has no works, is dead, being by itself.
18. But someone may well say, "You have faith and I have works; show me your faith without the works, and I will show you my faith by my works."
These ideas obviously led to the problems of "indulgences" sold to anyone wealthy enough. But, they are still in the Bible.