Whichever bank you choose, you will get around 10% interest on a time deposit Turkish Lira account, (depending on how much you invest), money tied up for around 32 days. You will pay 15% tax on the interest at source. The government guarantee is 50K Turkish lira per person per bank, joint account for 2 people would be 100K TL, so it is wise to spread your money around and make sure the banks you choose are not in the same banking group. The state banks, which some think are safer are Ziraat, Vakif and Halk Banks, though you may not get the best rate of interest and English speaking staff may be thin on the ground.