In 2026, the best money to take to Istanbul is a combination of Turkish Lira (TRY) and a travel-friendly debit or credit card. While the Lira is the official currency and is required for small purchases like street food, local markets, and public transit (via the Istanbulkart), the city is increasingly digital. Many restaurants and shops in tourist hubs like Sultanahmet and Beyoğlu prefer cards to avoid the hassles of physical currency volatility. It is also wise to carry a small amount of Euros or US Dollars as a backup; some private tour operators and high-end carpet shops may even quote prices in these currencies. However, you should always pay in Lira when possible to ensure you get the most accurate local price, as "tourist rates" for foreign cash can be unfavorable. For the best exchange rates, use an ATM (Bankamatik) once you arrive rather than exchanging large amounts at the airport.