Iranians pay across the country with the Iranian Rial (IRR). Always make sure to bring enough cash with you on the trip, as ATMs are not working due to the sanctions.      It is best to change money with the guide. He knows where the good, reliable exchange offices are and helps you with a good exchange rate. It is wise to bring Euros or American Dollars. These are accepted everywhere and can easily be changed. For the most recent exchange rate, visit www.xchange.com. Of course, it mainly depends on yourself how much you actually spend in Iran but as a guideline we advise around  € 40 to € 50 per day. You should be able to make it with that amount. If you like to buy souvenirs, you better bring something extra. Soft drinks are usually around € 1 and a meal between € 5 and € 10. Tipping local guides is always encouraged. They don’t earn much in this part of the world and it often makes a big difference to them. Of course this is according to your own preference.