In Vietnam, compared to other modes of transportation, renting car is quite expensive. This is largely due to the affordable and available public transportation system that runs within and between provinces.
The fee for renting a car ranges from VND 500,000 to 10,000,000 per day (about $25-500), depending on the type of car you choose and how luxurious it is. There are many types of cars for you to choose from, but the most common one is 4-seats and 7-seats cars. Customers are responsible for fuel cost, which is rather high compared with Vietnamese living standard (as of June 2011, it is $1 per litre).
Payment for car rental is usually made in cash directly to the agency. Some agencies might ask you for advance payment or a small deposit.