Zero. You can not deduct a net loss at all. However if you have some W2G forms (generally given on wins of $1200 or more in slots, video poker, and keno) then you can deduct other losses against these wins. You should keep documentation for any losses you claim. You may be thinking of deducting losses on stocks. There you can deduct up to $3000 a year, and can carry over amounts larger than that to the next year. I’m still carrying over losses from the tech crash in 2000.