Q: I try to keep track of how much ma’aser money I owe. However I did lose track of some small amounts of money that I earned. How should I go about giving ma’aser for this money?

A: According to Horav Shlomo Miller Shlit”a, the main issue you have to be concerned with is that your giving of maaser should not be done as a neder (promise) to be kept, but rather as a voluntary gift, then you calculate the amount due to the best of your ability.

Rabbi A. Bartfeld