Personal Commitments, Promises With Allah And Charitable Giving
10% of production is due as zakat, whether it is agricultural produce or industrial. Kids are your responsibility, however, you can count the share of your parents in zakat, and you need not tell them it is zakat. The amount of production should be taxable. The taxes you pay to the government can be counted as zakat paid. This is what is obligatory you. and if the business is not good enough, you are exempted. Your promise to God is an addition to what your actual obligation is. It is just like to promise God that you will say obligatory prayers. You make this promise or not, it is your duty to say your prayers.