If your domain has expired you can renew it for the regular price if 30 days has not passed since it expired.
This is called the reactivation period and subject to change without notice.
Beyond 30 days the domain is placed in the pending delete status.
After the 30 day period the renewal fee is very high in price. Most Registrars charge over $300.00 to renew a domain that is beyond the redemption period. The current Fee by our service is $250.00 plus the registration Fee.
I suggest you be sure your domain does not expire and should it expire renew it as quickly as possible to avoid the costly re-activation fee.