We buy vehicles in blocks of weeks and days. 5, 6 and 7 days and all multiples of this, fall under the same price band. Days under or above these multiples are charge at an individual daily rate. This way we can keep the 5, 6 and 7 day prices as low as possible. So if you have booked for instance 12 or 13 days hire your voucher will probably read 14 days and be booked as such. You will not have been charged any extra.