Taxis are cheap, but make sure to get a legal one. It is best to always use Pink Taxi.
They are the most recognizable because they have a pink taxi-sign on the roof. You can call them or stop one on the street.
NEVER get into a taxi that is waiting for you when you leave a club, nor take a taxi at the airport or bus-or train-station. Stick with Pink, it’s easiest and cheapest! Their number is +381 (0)65 4889977