The most spread form of payment in Ukraine is cash. At the same time, practically all basic credit cards - Visa, Mastercard, Cirus, Maestro are widely accepted for payment. Nevertheless, there might be problems when paying with American Express and Diners Club cards, while these paying systems are not spread enough in Ukraine. In many shops (in particular, of large distribution networks), restaurants, hotels, on petrol stations, etc. you will be able to pay with credit card.
There will also be no problem with cash withdrawal, especially in large cities. ATMs are installed in the airport terminals, at the railway stations, in the halls of many hotels, in supermarkets and just in the streets. Most ATMs are designed for Ukrainian national currency - hryvna. However, in big cities, such as Kyiv, Odesa, Lviv, Kharkiv, there are ATMs, where you may withdraw necessary sum in US Dollars. But it is more beneficial to withdraw money in hryvna. Banking fee in so doing will be up to 3% of the amount.