The standard: a tenth
Maaser kesafim literally means "a tenth of money." The widely accepted practice is to give 10% of your net income to tzedakah.
Chomesh: a fifth, for those who can
Giving a fifth — 20%, called chomesh — is considered the higher, praiseworthy measure for someone who can afford it. The Gemara (Kesubos 50a) records a fifth as the upper limit praised by Chazal, so that a person does not give away more than is wise.
Whether to give maaser or chomesh, and how to apply it to your own income, is a personal decision. Discuss it with your rav.
Setting your rate in Maaser Tracker
Maaser Tracker lets you set your default rate when you sign up — 10%, 20% chomesh, or a custom percentage — and override it on any single transaction (for example, giving 20% on a specific bonus). The running balance updates automatically.
Sources: Gemara, Kesubos 50a.
This page is general information, not a halachic ruling. For your own situation, ask your rav.
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