U.S. Citizenship and Immigration Services specifies that you must pay $455 for filing the application form to renew your green card. You also have to pay for taking your fingerprints, photograph, and signature. The additional sum for biometric services is $85. Therefore, the entire amount to renew your green card is $540. You have to pay the exact amount.
There are several cases when you can avoid paying the fee. For example, if you did not receive your first green card, but you requested a card for the second time by filing Form I-90, you are exempt from paying both the filing fee and the fee for biometric services. You can read more about Form I-90 fee waiver here.