An approach is provided for adjusting a characteristic of a data stream. A rate of data usage provided by one or more data streams within a time period that has not ended is determined. An amount of time remaining in the time period is determined. Based at least in part on the amount of time remaining in the time period and the rate of data usage, an expected amount of data usage within the entire time period is determined. Whether the expected amount of data usage exceeds a limit on data usage within the entire time period is determined. If the expected amount of data usage exceeds the limit, the characteristic of the data stream is adjusted so that actual data usage within the entire time period does not exceed the limit. The actual data usage is based in part on the adjusted characteristic.