(1) The amount of charity one should give is as follows: if one can but afford, let him give as much as is needed. Under ordinary circumstances, a fifth of one's property is most laudable. To give one-tenth is the average disposition. But to give less than one-tenth is niggardly. When the Rabbis said a "fifth" they meant a fifth of the property the first year only and a fifth of the profits in succeeding years.
RMI.—But a man should not squander more than one-fifth to charity, so that he might not himself become a public charge.This refers only to his lifetime. Of course, at the time of death one may leave for charity as much as he pleases.