There are a number of places to find rental car coupon codes. Most commonly now, rental car coupons are used on the internet and so it makes sense to look around the internet when trying to find them. That is not to say you cannot find great car coupons away from the internet but it is simply if you have limited time, you will most likely find what you want online. You can then make other people do most of your work of searching for rental car offers by visiting coupon websites. There is an argument though that the most upto date rental car coupons will be found by visiting the actual website owned by the different rental car companies.