ATMs are widely available. Credit and debit cards are accepted by most businesses in cities and tourist areas.
Turkey's currency is the Türk Lirası (Turkish lira; ₺). The lira comes in notes of five, 10, 20, 50, 100 and 200, and coins of one, five, 10, 25 and 50 kuruş and one lira. Lack of change is a constant problem; try to keep a supply of coins and small notes for minor payments. Post offices have Western Union counters.
ATMs dispense Turkish lira, and occasionally euros and US dollars, to Visa, MasterCard, Cirrus and Maestro card holders. Look for these logos on machines, which are found in most towns. Machines generally offer instructions in foreign languages including English.
It's possible to get around Turkey using only ATMs if you draw out money in the towns to tide you through the villages that don't have them. Also keep some cash in reserve for the inevitable day when the machine throws a wobbly. If your card is swallowed by a stand-alone ATM booth, it may be tricky to get it back. The booths are often run by franchisees rather than by the banks themselves.
Visa and MasterCard are widely accepted by hotels, shops and restaurants, although often not by pensions and local restaurants outside the main tourist areas. You can also get cash advances on these cards. Amex is less commonly accepted outside top-end establishments. Inform your credit-card provider of your travel plans; otherwise transactions may be stopped, as credit-card fraud does happen in Turkey.
For current exchange rates see www.xe.com.
Euros and US dollars are the most readily accepted foreign currencies. Shops, hotels and restaurants in many tourist areas accept these, and taxi drivers will take them for big journeys.
The Turkish lira is weak against Western currencies, and you will probably get a better exchange rate in Turkey than elsewhere. The lira is virtually worthless outside Turkey, so make sure you spend it all before leaving.
US dollars and euros are the easiest currencies to change, although many exchange offices and banks will change other major currencies such as UK pounds and Japanese yen.
You'll get better rates at exchange offices, which often don't charge commission, than at banks. Exchange offices operate in tourist and market areas, with better rates often found in the latter, and some post offices (PTTs), shops and hotels. They generally keep longer hours than banks.
Banks are more likely to change minor currencies, although they tend to make heavy weather of it. Turkey has no black market.
Turkey is fairly European in its approach to tipping and you won't be pestered for baksheesh. Tipping is customary in restaurants, hotels and taxis; optional elsewhere.
Restaurants A few coins in budget eateries; 10% of the bill in midrange and top-end establishments.
Hotel porter €2 per bag (mid-range hotel), €5 per bag (top-end hotel).
Taxis Round up metered fares to the nearest lira.
Banks, shops and hotels usually see it as a burden to change travellers cheques, and will either try to persuade you to go elsewhere or charge you a premium for the service. If you do have to change them, try one of the major banks.