Calculate a prorated bill, unused credit, or full-period charge from days used or inclusive service dates, with daily rates and actual billing-cycle days.
Prorated Bill Formula
The following formula is used to calculate the Prorated Bill.
Formula source: Social Security Administration โ Proration of SSI Payments (Handbook ยง2184.4)
- Where PB is the Prorated Bill ($)
- MB is the monthly bill amount ($)
- D_u is the number of days used in the month
- D_m is the number of days in the month
To calculate a prorated bill, multiply the monthly bill by the number of days used in the month, then divide by the number of days in the month.
How to Calculate a Prorated Bill?
The following example problems outline how to calculate Prorated Bill.
Example Problem #1:
- First, determine the monthly bill amount ($).
- The monthly bill amount ($) is given as: 700.
- Next, determine the number of days used in the month.
- The number of days used in the month is provided as: 10.
- Finally, calculate the Prorated Bill using the equation above:
PB = MB / 30.5 * #D
The values given above are inserted into the equation below and the solution is calculated:
PB = 700 / 30.5 * 10 = 229.508 ($)
Example Problem #2:
For this problem, the variables needed are provided below:
monthly bill amount ($) = 800
number of days used in the month = 15
This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.
PB = MB / 30.5 * #D = ?
