The lowest I can recall was about 500. I imagine they can go to zero.
what is the lowest rating
A brick would score roughly 0. The only human to score less that this would be Hillary Clinton, were she to attempt to learn the game.

In denmark the lowest otb rating you can get is 1000.(danish chess union). no player in denmark has a rating lower than 1000 in the union.
denmarks official ratinglist: http://www.dsu.dk/index.php?id=55

would a 0 rating mean you are not even capable of moving pieces on a chessboard (or online)?? maybe it means you are the worst player in the world. There are days when I feel I deserve a 0 rating.

I played some guy years ago when I was rated probably about 1300 online(but I played him otb), and I beat him two times in a row without my queen. I would call that guy a zero rated player


Wait a minute, that was me
His name wasn't Kevin
sorry - i thought i recognized myself there (i have improved somewhat since)

I like to think a 0 rating is possible because it makes me look like a really strong player by comparison HAHAHAHAHA


Yes, playing games like that can't make you feel good about your chess playing. But it is fun to do in a more casual setting with adults(and wine).

when I was teaching my son and his friends to play, I would deliberately play at or just above their level, so they would have to fight for every victory. It improved their skills quickly. Demolishing them by playing my best would have turned them against chess, probably forever. Instead, my son is the best player in his school, and his friends aren't bad either.
what is the lowest rating you can have in chess.com does it go into minus what do you think is 0 the lowest possible?