Example of rollover
Suppose you provide a monthly service:
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$50 per month includes up to 500 minutes free talk each month.
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The unused minutes from the monthly plan allowance can roll over to the following months.
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If the usage exceeds the monthly plan allowance, pay overage $0.1 per minute.
You can set the following rate plans for your service:
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Create a recurring rate plan and set the flat rate of $50 per month.
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Create an overage monthly rate plan.
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Set Included Units to 500 minutes.
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Set List Price to $ 0.1 .
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Select Month from the Billing Period list.
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Select Rollover from the Smoothing Model list.
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Type 3 in the Number of Periods field.
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The following table lists the usage for a customer who subscribes your service for a year:
|
Month |
Units in Plan |
Usage |
Month in Period |
Unused Units in the Rollover Period |
Overage |
Action |
Notes |
|
January |
500 |
450 |
January |
50 |
0 |
None |
The unused units (50) roll over to February. |
|
February |
500 |
600 |
January, February |
0 |
50 |
Reset |
The usage in February (600) exceeds the total units that can be used (550). Extra 50 units ($5) are charged at the end of this period. The window is reset at the end of this rollover period (January -February). The next rollover period is: March-May. |
|
March |
500 |
450 |
March |
50 |
0 |
None |
The unused units (50) rolls over to April. |
|
April |
500 |
450 |
March, April |
100 |
0 |
None |
The unused units (100) rolls over to May. |
|
May |
500 |
1000 |
March, April, May |
0 |
400 |
Reset |
The usage in May (1000) exceeds the total units that can be used (600). Extra 400 units ($40) are charged at the end of this period. The window is reset at the end of this rollover period (March - May). |
|
June |
500 |
450 |
June |
50 |
0 |
None |
The unused units (50) rolls over to July. |
|
July |
500 |
450 |
June, July |
100 |
0 |
None |
The unused units (100) rolls over to August. |
|
August |
500 |
450 |
June, July, August |
150 |
0 |
None |
The unused units (150) rolls over to September. |
|
September |
500 |
450 |
July, August, September |
150 |
0 |
None |
The unused units (150) rolls over to October. The unused units in June (50) are expired. |
|
October |
500 |
450 |
August, September, October |
150 |
0 |
None |
The unused units (150) rolls over to November.The unused units in July (50) are expired. |
|
November |
500 |
1000 |
September, October, November |
0 |
350 |
Reset |
The usage in November (1000) exceeds the total units that can be used (650). Extra 350 units ($35) are charged at the end of this period. The window is reset at the end of this rollover period (September - November). |
|
December |
500 |
660 |
December |
0 |
160 |
Reset |
The usage in December (660) exceeds the total units that can be used (500). Extra 160 units ($16) are charged at the end of this period. |
Overage charges by service period
The following table lists the overage charges and their corresponding service periods:
| Service Period | Quantity | Total |
|---|---|---|
| 02/01/2015 to 02/28/2015 | 50 | $5 |
| 05/01/2015 to 05/31/2015 | 400 | $40 |
| 11/01/2015 to 11/30/2015 | 350 | $35 |
| 12/01/2015 to 12/31/2015 | 160 | $16 |