keeping track of wins and losses

Just wondering how people keep track of the wins and losses throughout the year? I normally just know how much cash I used of my own and whether I lost it all or won enough to be ahead for the trip. I look at the win/loss statement and that is really enlightening as to how much I lost for the year. I am asking this for tax purposes knowing that you can't use the win/loss statement. Thanks.

Use of the win/loss stmts pretty much up to the IRS auditor. I've been audited 2 times and both times they accepted them. At the end of each trip I always mark down my win/loss in my trip diary and one of them used it as a backup to the stmts.

You CAN use your win/loss statements if you are audited.

I've had one audit. I submitted the win/loss statement (per the IRS's instructions) and it was accepted, done, nothing more required.

If you receive notice of audit from the IRS, they send you information how to submit items they accept as "evidence", which include personal records, casino win/loss statements, losing horserace tickets, losing lottery tickets, etc.

I think if you gamble professionally for a living, then personal records may be more critical at tax time.