Nope. I just say "I want to give this much" without thinking of percentages at all. Sometimes special things come up and I say "I want to give 50 bucks to that!" There is no thought of "percentage" at all. Sure; a combination of passages. 2Co 9:7 Each one must give as he has decided in his heart.. Php 4:8 Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things. The part about putting your paycheck is not in scripture, but I thought it was a nice touch. -----Added 11/17/2009 at 12:05:29 EST----- No. I think that this is so stigmatized, it cannot HELP but lead to legalism. Any "percentage" system is going to lead to law keeping.