When I have gone to my tax preparers, both of them have calculated my gambling income this way: Add up all w2-g’s that were reported. This is the total income. Then put in whatever deductions you need to make the difference equal to your net gambling result for the year.

Two different accountants that I have had including one in Las Vegas who does this all the time say this is right. Are you likely to get any significant problems by doing it this way?

I have heard other people say you should add up all your session gains, call that total income, then deduct all session losses. But what is a session anyway? If you stay at a casino for a week while you make $50k and then lose the $50k, do you need to count it as $50k of income and $50k of deductions? What if you make and lose the $50k in two days or one day?

You would probably pay the exact same tax bill no matter how you do it as long as you are reporting your total results for the year. Can your accountant doing it one way or the other really cause a lot of big problems?