I think this totally depends on the business you are running. If you have outside investors, I think they will for the most part dislike the idea of a percentag

I think this totally depends on the business you are running. If you have outside investors, I think they will for the most part dislike the idea of a percentage of income going outside of the business. Plus, if your business requires capital to be reinvested in order to fund growth, that's where your cash flow should go. In most cases, all your focus should be on growing your business because chances are that will allow you to donate and have a positive impact on the world if it's able to survive and make you wealthy. There are a few cases where I could see your idea working out though: I've analyzed some mostly family owned businesses with very low capital requirements. For example, there is one that builds a special component for aircrafts. Each year, the business generates about $800K in free cash flow. All that does is pile up on their balance sheet. In a normal company, the shareholders would ask for a dividend, but in this case, the family could donate that annual $800K in FCF with no problem. There's also a European hedge fund, The Children's Investment Fund, that donates 0.5% of their assets to charity or $30M a year since they run $6B.