If a subscriber changes service, what method adjusts charges for the portion of the cycle used?

If a subscriber changes service, what method adjusts charges for the portion of the cycle used?

• A. Recalculation
• B. Billing adjustment
• C. Prorating
• D. Flat rate

Answer: (C)

When a subscriber changes service partway through a billing cycle, charges should reflect only the portion of time each service was active. This is prorating. Prorating allocates the bill proportionally to the days the old service was used and the days the new service was used, so the customer pays for actual usage. For example, if a cycle is 30 days and the old service costs $60 per month while the customer switches on day 10, you’d charge 60 × (10/30) for the old service and 90 × (20/30) for the new service, totaling the amount due for that cycle. This method avoids overcharging or undercharging and accurately tracks partial-cycle usage. Recalculating the entire bill from scratch, billing adjustments, or applying a flat rate would not properly reflect the partial usage period.

When a subscriber changes service partway through a billing cycle, charges should reflect only the portion of time each service was active. This is prorating. Prorating allocates the bill proportionally to the days the old service was used and the days the new service was used, so the customer pays for actual usage. For example, if a cycle is 30 days and the old service costs $60 per month while the customer switches on day 10, you’d charge 60 × (10/30) for the old service and 90 × (20/30) for the new service, totaling the amount due for that cycle. This method avoids overcharging or undercharging and accurately tracks partial-cycle usage. Recalculating the entire bill from scratch, billing adjustments, or applying a flat rate would not properly reflect the partial usage period.