I don’t think there is a specific amount to be used for gambling, or a certain percentage of your income for gambling but it always advised that you gamble with what you can afford to lose. If you can afford to lose 5% of your income then that the amount that is advisable for you to gamble with. We have all seen people who don’t discipline about gambling and we end up seeing them losing so much in gambling and we this you can easily turn to an addict.