A method and associated system are provided for processing data to complete a collect telephone call to a called-party that has prepaid an account to pay for the collect call. Data is received regarding a collect call from a caller to the called-party. Next it is determining whether the called party is associated with a prepaid account and the rate to be applied to the collect call. The rate to be applied to the call is increased by a tax rate and the data is sent regarding the call rate to be applied to the collect call so that the call can be completed between the called party and caller.