public transportation in Istanbul
On public transport (IETT busses, ferries, metro and tram lines) in Istanbul, cash or credit card is not valid, you can only pay with “Istanbulkart“.
IstanbulKart is a payment method used in public transport in Istanbul. Only Istanbulkart is valid in all public transport system in Istanbul (IETT buses, Metrobus, ferry, subway, tram, funicular). Money or credit card payment is not possible.
(Cash payments are available in Taxis. 🚕 In most taxis, credit cards are also valid.)
You can buy “Istanbulkart” from the buffets at the IST Airport. And you can upload credits to “Istanbulkart” in buffets and vending machines.
Istanbulcard can be purchased and credit loaded from the buffets on the streets or from automatic machines at metro/bus stops.
You can see the “Istanbulkart Tariff” on that website: