Enhanced Discount use cases
Applying enhanced discount to recurring charges
You can compare the results when the Enhanced Discount is enabled and disabled for discount charges in the following use cases to decide whether to use the Enhanced Discount feature and how to specify the discount duration.
The use cases below are grouped based on the length comparison between the charge billing period and the discount duration.
How to understand Zuora use cases?
Before reading the following use cases,

Enhanced Discount enabled for a discount charge means that the Allow apply to billing period partially checkbox is selected for the discount charge. For more information, see Enhanced Discount.

The “charge” in this article refers to a regular charge except for delivery pricing, prepayment and drawdown, and discount charges.

The results below are based on the following billing rules values. If you set the billing rules to other values, your results will differ slightly.

When prorating a month, assume 30 days in a month or use actual days: Use actual number of days

When prorating periods greater than a month, prorate by month first, or by day: Prorate by day

Charge billing period is longer than discount duration
If your charge billing period is longer than the discount duration, refer to the following use cases.
Use case 1.1: Start dates of charge and discount are aligned
The diagram below shows that the start dates of a charge and discount are aligned on 06/01/2023.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

1.1.a  10%  Unchecked  N/A  120  10  10  10  10  10  10  10  10  10  10  10  10 
1.1.b  10%  Checked  N/A  30  10  10  10  0  0  0  0  0  0  0  0  0 
1.1.c  $10  Unchecked  Month  10  10  0  0  0  0  0  0  0  0  0  0  0 
1.1.d  $10  Checked  Month  30  10  10  10  0  0  0  0  0  0  0  0  0 
 For the 1.1.b percentage discount, the total discount is  $30 =  $100/month * 10% * 3 months.
 For the 1.1.d fixed amount discount, the total discount is  $30 =  $10/month (Fixed Amount Discount Billing Period) * 3 months.
Use case 1.2: Start dates of charge and discount are not aligned
The diagram below shows that the start dates of a charge and discount are not aligned.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

1.2.a  10%  Unchecked  N/A  0  0  0  0  0  0  0  0  0  0  0  0  0 
1.2.b  10%  Checked  N/A  30  0  0  0  0  0  0  0  0  0  10  10  10 
1.2.c  $10  Unchecked  Month  0  0  0  0  0  0  0  0  0  0  0  0  0 
1.2.d  $10  Checked  Month  30  0  0  0  0  0  0  0  0  0  10  10  10 
 For the 1.2.b percentage discount, the total discount is  $30 =  $100/month * 10% * 3 months.
 For the 1.2.d fixed amount discount, the total discount is  $30 =  $10/month (Fixed Amount Discount Billing Period) * 3 months.
Charge billing period is the same as discount duration
If your charge billing period is the same as the discount duration, refer to the following use cases.
Use case 2.1: Start dates of charge and discount are aligned, fixed amount discount
The diagram below shows that the start dates of a charge and discount are aligned on 06/01/2023.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

2.1.a  $15  Unchecked  Quarter  15  15  0  0  0  0  0  0  0  0  0  0  0 
2.1.b  $15  Checked  Quarter  60  15  0  0  15  0  0  15  0  0  15  0  0 
For the 2.1.b fixed amount discount, the total discount  $60 =  $15/quarter (Fixed Amount Discount Billing Period) * 4 quarters. The charge price of the first month in each quarter completely offsets the discount in that quarter.
Use case 2.2: Start dates of charge and discount are not aligned
The diagram below shows that the start dates of a charge and discount are not aligned.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not.
For the fixed amount discounts 2.2.c and 2.2.d, the fixed amount discount billing period equals the charge billing period.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

2.2.a  10%  Unchecked  N/A  10  0  10  0  0  0  0  0  0  0  0  0  0 
2.2.b  10%  Checked  N/A  9.84  5  4.84  0  0  0  0  0  0  0  0  0  0 
2.2.c  $15  Unchecked  Month  15  0  15  0  0  0  0  0  0  0  0  0  0 
2.2.d  $15  Checked  Month  14.76  7.5  7.26  0  0  0  0  0  0  0  0  0  0 
 For the 2.2.b percentage discount, June discount is  $5= $100/month * 10% * 15/30*1 month and July discount is  $4.84=  $100/month * 10% * 15/31*1 month. The total discount amount is  $9.84.
 For the 2.2.d fixed amount discount, June discount is  $7.5= $15/month (Fixed Amount Discount Billing Period) * 15/30*1 month and July discount is $7.26 =  $15/month (Fixed Amount Discount Billing Period) * 15/31*1 month. The total discount amount is  $14.76.
Use case 2.3: Start dates of charge and discount are not aligned, fixed amount discount billing period is smaller than charge billing period
The diagram below shows that the start dates of a charge and discount are not aligned.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not. For the fixed amount discounts 2.3.a and 2.3.b, the fixed amount discount billing period is smaller than the charge billing period.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

2.3.a  $15  Unchecked  Month  15  0  0  0  15  0  0  0  0  0  0  0  0 
2.3.b  $15  Checked  Month  45  7.5  15  15  7.5  0  0  0  0  0  0  0  0 
For the 2.3.b fixed amount discount, June and September discount is the same  $7.5 =  $15/month (Fixed Amount Discount Billing Period) * 15/30*1 month, and July and August discount is the same  $15 =  $15/month (Fixed Amount Discount Billing Period) * 1 month. The total discount is  $45.
Charge billing period is shorter than discount duration
Use case 3.1: Start dates of charge and discount are not aligned, percentage discount
The diagram below shows that the start dates of a charge and discount are not aligned.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

3.1.a  10%  Unchecked  N/A  10  0  10  0  0  0  0  0  0  0  0  0  0 
3.1.b  10%  Checked  N/A  15  5  10  0  0  0  0  0  0  0  0  0  0 
For the 3.1.b percentage discount, June discount is $5=$100/month * 10% * 15/30*1 month and July discount is $10=$100/month * 10% * 1 month. The total discount is $15.
Use case 3.2: Start dates of charge and discount are not aligned, fixed amount discount
The diagram below shows that the start dates of a charge and discount are not aligned.
The table below shows the differences when the ApplyToBillingPeriodPartially checkbox is checked or not. For the fixed amount discounts 3.2.a and 3.2.b, the fixed amount discount billing period equals the charge billing period.
Number  Discount Rate  ApplyToBillingPeriodPartially  Fixed Amount Discount Billing Period  Total Discount Amount  June  July  August  September  October  November  December  January  February  March  April  May 

3.2.a  $10  Unchecked  Month  110  0  10  10  10  10  10  10  10  10  10  10  10 
3.2.b  $10  Checked  Month  115  5  10  10  10  10  10  10  10  10  10  10  10 
For the 3.2.b fixed amount discount, the total discount is  $10/month (Fixed Amount Discount Billing Period) * 11.5 months.
Applying enhanced discount to onetime charges
For a fixed amount discount charge applied to a onetime charge, to fully apply the discount amount, ensure the fixed amount discount's duration matches the fixed amount discount's billing period.
For example, a onetime charge of $100 starts from 01/14/2023, the fixed amount discount charge is $5 off, and the billing period of the fixed amount discount charge is set to month:
 If the discount duration is set from 01/14/2023 to 02/14/2023, the discounted amount of the onetime charge is $95. This is because the discount amount applied on 01/14/2023 is $5=$5/month (Fixed Amount Discount Billing Period)*1 month.
 If the discount duration is set from 01/14/2023 to 01/15/2023, the discounted amount of the onetime charge is $99.84. This is because the discount amount applied on 01/14/2023 is $0.16=$5/month (Fixed Amount Discount Billing Period) * 1/31*1 month.