Renting a car can get expensive. If you don't follow a few basic guidelines, you might end up paying more than you expected to. Here are three best tips to keep in mind before renting a vehicle:

1. Don't rent from the first company you contact. Do your research before you commit to anyone or anything. Many assume that the same terms, prices and conditions apply to all companies, but this is not true. Discounts and specials differ greatly between rental companies. This can depend on a number of factors such as the time of the year, how long you need the car for, and the size of the car you need. Many places give discounts if you rent on a weekend. Others offer weekly deals. Take time to call around and see what companies are having the special that suits your needs. It's good to get the standard rate of the car you need too. Standard rates can vary a lot too.

2. Always ask about any additional charges. Renting a car is not the same as renting a bike. It's a big responsibility. Companies have been known to tell you one rate over the phone, and then by the time you arrive, they've tacked on a lot of other charges. These can include mandatory charges for gas, mileage, or a number of other things. Always ask what else you will have to pay for when you arrive to rent the vehicle.

3. Understand all of the conditions and terms. As with everything else, read the fine print. Many times, people sign because they're in a hurry then realize they were charged for something they weren't aware about. Read everything before you commit to the contract.

Renting a car can be a bit stressful. Just do your research prior to needing the car and you can save yourself a lot of money. Always compare companies, ask about additional fees and read and understand the terms you are agreeing to before signing.