According to an alert I just received from Register.com, VeriSign (the authority that doles out domain names) just upped their prices. So your registrar (the company you bought your domain name from) is going to up their prices as well. Note, they are not limited to just their cost increase. Register.com promises only to pass on the actual cost; others can add on anything they want and are legally entitled to do so.
See below....
ICANN Registry Price Increases
VeriSign and PIR have announced the registry price for NET, ORG and NAME domain names are increasing their registration fee. This ICANN-approved rate increase affects all domain name registrars and resellers alike.
These registry-imposed increases are unavoidable. To minimize the impact, Our Partnerships group are only increasing our costs by the amounts imposed by the registry. Unlike some other registrars we are making no additional profit from these price rises.
Here are some of the questions that you may have on these increases:
Q: What is the increase and when do they take effect?
A: Please see the below chart which outlines the increase and corresponding date.
Q: What do I need to do to implement these changes?
A: Nothing. These new fees will be automatically reflected in your account beginning on the dates indicated above.
A: The registries argue that they need the extra funding to build up their security and support infrastructure and keep up with the ever expanding growth of the internet.