Further to my last comment about the multa per day now being $4.50, there has also been a recent change to the tourist visa situation.
As I understand the situation, up until earlier this year, your tourist visa can be 90 days or 183 days.The difference for awarding the 183 day one seems to be IF you are visiting family....but not 100% sure!!
When your visa expired, you could simply fly out to another country..eg Chile, Ecuador etc, return and get another tourist visa in Peru....BUT NOT NOW, the maximum remains at 183 days ....but only ONCE in a 365 day period.
How do I know? well, my wife is a Peruvian citizen, but when we immigrated back to Peru, after 11 years in my home country,Australia, she entered Peru on her Aussie passport, because she didnt think that she could enter on her DNI.....wrong!!
Now, after 6 months, she has to fly out on her Aussie passport, to get it "exit" stamped, then fly back and re-enter on her Peruvian DNI. Carumba !!
Why they couldnt just change her status on Migraciones computer is beyond me.....but there again, I am a logical person.
She received an Urgent notice from Migraciones informing her what she had to do, and stated the NEW tourist visa period per YEAR.
Hope my anecdote helps someone !!