Many foreigners can stay in Argentina for up to 90 days without a visa. The 90 day tourist visa can be extended for a maximum of 180 consecutive days.1
Requirements for all nationalities:
http://www.migraciones.gov.ar/accesible/indexdnm.php?visas
People who have overstayed their visa must pay a fine at Ezeiza International Airport, Jorge Newbery Airport, Sede Central Edificio 6, or Delegación de esta Dirección Nacional.2
Fine rates:
https://www.argentina.gob.ar/interior/migraciones/cuadro-tasas-migratorias
Digital Nomad Visa
Foreigners who do not require a tourist visa to enter Argentina can apply for a digital nomad visa to stay up to 180 days.3
Requirements include: