Reply To: Maaser Kesafim / Tzedaka � The 20% Ceiling

Just to get an idea of some of the questions and opinions out there please see:

http://halachafortoday.com/Maaser.aspx

also:

http://www.torah.org/advanced/weekly-halacha/5763/mishpatim.html

and:

http://www.tzemachdovid.org/thepracticaltorah/vayeitzei.shtml

In many cases confirmable mekoros are given.