Modelling usage per day and invoicing per month

[Thomas Lundström]

Hey,

I'm trying to use Killbill to model a recurring IN_ARREAR + usage IN_ARREAR case where usage is measured/priced/specified on invoice in a daily fashion, but invoicing is done monthly.

Let's say that our users can subscribe to a candy-plan where they pay X USD per month for the subscription (IN_ARREAR) and then they can order gummy-bears to be delivered daily, i.e. the usage is per day and invoiced IN_ARREAR. In order for my customers to know their usages, I'd like their monthly invoices to display its daily gummy-bear usages per day including the daily price for the past month.

If I model my plan purely monthly, i.e. I've got finalPhase.recurring.billingPeriod: MONTHLY and finalPhase.usages.usage.billingPeriod: MONTHLY, then I get a fully rolled up monthly invoice. All usages are rolled up into one, which means that my customers won't get their daily usages spec'd on the invoices. 

If I instead model my plan with monthly recurrence and daily usage, i.e. finalPhase.recurring.billingPeriod: MONTHLY and finalPhase.usages.usage.billingPeriod: DAILY I get the recurring invoice on a monthly basis but all daily usages are on separate daily invoices.

Are there any ways for me to model a plan within the business rules as specified above, i.e. only generate one monthly invoice per account, where usage aggregation/pricing/specification is grouped daily on the invoice?

Best regards,

Thomas 

[stephane brossier]

Hi Thomas,

If you need to invoice on a monthly basis, then using a MONTHLY billing period is the right approach. If your goal is to provide the granularity of what was consumed every day, we offer a usage API to retrieve the data points. If your goal is to translate this into a daily $ amount, you would need to do this yourself and build a presentation layer on top of the invoices that killbill generates - perhaps leveraging the invoice template feature offered (i have not tried, not sure how easy it would be).

Stéphane

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