The short answer to your question is the fine is $50 pesos payable when you leave. I've never heard of anyone being denied re-entry after this.ljensen said:I did not make it out of the country within the 90 day limit and am wondering what the penality will be. I am flying back to the states in a couple of weeks but returning to BsAs one month later. I don't want any problems with my return. Thank you!