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Knowledge Center > Subscription Management > Subscriptions > Proration

Proration

Zuora allows you to prorate a partial period fees in order to align your charges to a certain bill cycle day. This article introduces how proration works in Zuora so that your invoices will match your requirements and your customers will understand what they are being billed for.

Proration is controlled under the Billing > Define Billing Rules setting.  

Proration for One-time Charges

If you would like to give prorated credit back to your customers for a one-time charge, click your username at the top right and navigate to Billing Define Billing Rules and set Set Enable credit back for removing or canceling one time charges? to Yes (the default is No).

Proration for Recurring Charges

Prorate for Partial Month

The proration of a partial month is controlled by the Bill recurring charges for partial month (with monthly based billing periods)? setting in Billing > Define Billing Rules.

See Calculating Total Amount with Partial Month Proration for more information.

For example, imagine a scenario where:

  • Bill cycle day of the subscription rate plan charge is set as Default from Customer Account
  • Bill cycle day of the account is set as 1st of the month
  • Billing period set to monthly
  • Subscription billing trigger date is 11/10/2018
  • Rate plan is set to align to subscription or align to term such that the first full monthly period is 12/01/2018 – 12/31/2018

If Bill recurring charges for partial month (with monthly based billing periods)? is set to Yes (the default), the invoice generated will show a prorated charge with a service period from the subscription trigger date to the bill cycle day. In this scenario, the first invoice would show a prorated charge for the service period of 11/10/2018 - 11/30/2018. The following month's invoice will charge for a service period of 12/01/2018 – 12/31/2018, to align with the bill cycle day.

If Bill recurring charges for partial month (with monthly based billing periods)? is set to No, in this scenario the first invoice would not show a charge for the period 11/10/2018 - 11/30/2018, as this is a partial month. The following month's invoice would charge for a service period of 12/01/2018 – 12/31/2018, to align with the bill cycle day.

File:CA_Billing/C_Subscriptions/G_Proration/Partial_Month.jpg

When prorating a month, assume 30 days in a month or use actual days?

If you choose Yes for the Bill Recurring Charges for partial month? setting in Billing > Define Billing Rules you can choose to calculate the charges using the actual number of days, or you can have Zuora assume there are thirty days in a month.

For example, a customer has a monthly charge with a bill cycle day set to 1st of the month. If this customer signs up for a new product on January 10th, you can bill this customer for the prorated charges using one of two proration options:

  • With the "Assume 30 days in a month" option, the charge would be prorated to 22 days divided by 30 days in the assumed month, multiplied by the total charge amount.
  • With the "Use actual number of days" option, the calculation would be 22 days divided by 31 days in January, multiplied by the total charge. If the customer signs up on June 10th, however, the prorated amount would be 22 days divided by 30 days in June, multiplied by the total charge. 

Prorate for Partial Period

This feature is in Limited Availability. If you wish to have access to the feature, submit a request at Zuora Global Support

As well as a monthly billing period, customers can also subscribe with quarterly, semi-annually or annually billing periods. Therefore, in addition to proration by partial month, you can also choose whether or not to prorate for partial periods. By default, the option to prorate recurring charges at any point during the period is set to Yes.

If your tenant has the feature enabled, you can set Prorate recurring charges for partial period? to No by navigating to Billing > Define Billing Rules. This is useful in a variety of situations, for instance when selling physical goods that are dispatched at the start of a billing period.

See Calculating Total Amount with Partial Period for more information.

For example, imagine a scenario where:

  • Bill cycle day of the subscription rate plan charge is set as Default from Customer Account
  • Bill cycle day of the account is set as 1st of the month
  • Subscription billing trigger date is 7/15/2018
  • Billing period of the rate plan is set to quarterly
  • Rate plan is set to align to subscription or align to term such that the first full quarter period is 10/1/2018 to 12/31/2018

For billing periods greater than a month, the results of the proration depend on the combination of Prorate recurring charges for partial period? and Bill recurring charges for partial month (with monthly based billing periods)? settings:

Prorate for partial month and partial period

Bill recurring charges for partial month (with monthly based billing periods)? = YesProrate recurring charges for partial period? = Yes

The invoice generated would show a prorated charge with a service period from the subscription trigger date to the bill cycle day. In this scenario, the first invoice would show a prorated charge for the service period of 7/15/2018 - 9/30/2018. The following invoice would charge for a service period of 10/1/2018 – 12/31/2018, to align with the bill cycle day.

Prorate for partial period

Bill recurring charges for partial month (with monthly based billing periods)? = NoProrate recurring charges for partial period? = Yes

The invoice generated would ignore the partial month and show a prorated charge with a service period from the start of the first full month to the bill cycle day. In this scenario, the first invoice would show a prorated charge for the service period 8/1/2018 - 9/30/2018. The following invoice would charge for a service period of 10/1/2018 – 12/31/2018, to align with the bill cycle day.

Do not prorate

If Bill recurring charges for partial month (with monthly based billing periods)? = No, Prorate recurring charges for partial period? = No

No proration occurs and the first invoice generated would show no charge for the period 7/15/2018 - 9/30/2018. The following invoice would charge for a service period of 10/1/2018 – 12/31/2018, to align with the bill cycle day.

File:CA_Billing/C_Subscriptions/G_Proration/Parial_Period.jpg

It is not possible to set Bill recurring charges for partial month (with monthly based billing periods)? to Yes and Prorate recurring charges for partial period? to No, as this is an invalid combination.

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

If you are billing annually, semi-annually or quarterly and you are prorating, you can control how Zuora calculates the length of a month. Click your username at the top right and navigate to​​​​BillingDefine Billing Rules to find the When prorating periods greater than a month, prorate by month first, or by day? setting.

The Prorate by month first option causes proration to be calculated based on whole months first, with the remaining days prorated over a month. The Prorate by day option means the proration will be based on the exact number of days in the months. 

When using the Prorate by month first option, the proration period depends on what is selected for the When prorating a month, assume 30 days in a month or use actual days?  setting.

For example, if you are prorating for 2.5 months, Prorate by day might calculate the proration based on a value of 75 days (the actual number of days would vary, depending on the particular months in question). Prorate by month first would calculate the proration period as 2.5 x the length of a 'month' as set in the When prorating a month, assume 30 days in a month or use actual days?  setting.

Prorate for Partial Week

Weekly based billing period is in Limited Availability. If you wish to have access to this feature, submit a request at Zuora Global Support.

The proration of a partial week is controlled by the Bill recurring charges for partial week (with weekly based billing periods)? setting.

See Calculating Total Amount with Partial Week Proration for more information.

Example Scenario:

  • Billing Period: Week
  • Billing Day: Specific Day of Week, Wednesday
  • Billing Period Alignment: Align to Charge 

A customer subscribes to your service for four weeks starting from 01/01/2018.

If Bill recurring charges for partial week (with weekly based billing periods)? is set to Yes, partial weeks are charged. In this scenario, two partial week fees are charged on invoices. The first invoice shows a prorated charge for the service period of 01/01/2018 - 01/02/2018. In the following week, the invoice charges for service period of 01/03/2018 – 01/09/2018, to align with the bill cycle day. Then the charge is billed for every week through the subscription term. The last invoice also shows a prorated charge for service period of 01/24/2018 - 01/28/2018.

If Bill recurring charges for partial week (with weekly based billing periods)? is set to No, partial weeks are not charged. In this scenario, prorated charge for the service periods of 01/01/2018 - 01/02/2018 and 01/24/2018 - 01/28/2018 are not included on the invoice. The first invoice shows the service period of 01/03/2018 – 01/09/2018, to align with the bill cycle day.

Proration for Usage Charges

For usage charges:

  • If Bill usage charges for partial month? is set to Yes (the default), all usage charges that occur within a prorated month will be billed.
  • If Bill usage charges for partial month? is set to No, then no usage charges that occur within a prorated billing period are billed.

Proration Credit

For information on how prorated credit is issued, seProration Credit.

Additional Information

Having a good understanding of cancelations and proration can help you to avoid unexpected proration, undesired credit-backs, and unnecessary charges being billed to the customer. We recommend the following knowledge center articles:

Last modified
22:44, 19 Dec 2016

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