What are Iran’s currency and exchange rules?
Currency: The rial (IRR) is the currency of Iran, however prices are often quoted in toman. One toman is equal to ten rials. You can get about 30,000 and 40,000 rials for US$1 and €1 respectively. Banknotes produced in 500, 1,000, 2,000, 5,000, 10,000, 20,000 , 50,000 and 100,000, If you remember that a yellow 50,000 note is approximately equal to a euro you won’t get confused. For large amounts you will see Iran Cheques being used, in 500,000 (~US$15) rial denominations. It is now used in the same way as cash.
Unfortunately credit cards are of no use in Iran so it is recommended to have enough money on you for the duration of your trip but if you are worried about carrying too much cash it is a possibility to get a pre-paid no-name gift card without any service fee and surcharge and get the exact amount of money you put in it. All ATM s support English language.