Billing Rules
Billing Rules
Billing Rules determine how service start dates align with invoicing cycles. These rules govern how invoices are generated when services are created on dates that do not align exactly with the standard billing periods. Applicable to quarterly, semiannual, and yearly services. There are five primary billing rules, each with distinct invoice generation logic.
- From the left-hand side of the page under the Billing Setup section, click on Billing Rules to view the list of billing rules.

Billing Rule: UNFIXED_PRORATA
Example: Yearly
- Service Created: 25th April 2025
- Billing Cycle: Yearly
Invoice Generation
- Pro Rata Invoice: 25th April 2025 to 30th April 2025
- Next Unfixed Invoice: 1st May 2025 to 30th April 2026
Example: Quarterly
(Quarters: Jan-Mar, Apr-Jun, Jul-Sep, Oct-Dec) In Unfixed prorate invoice gets generated for created months' remaining days and next 3 months' invoice gets generated, no matter in which quarter currently we are.
- Service Created: 25th Feb 2025
- Billing Cycle: Quarterly
Invoice Generation
- Pro Rata Invoice: 25th Feb 2025 to 29th Feb 2025
- Next Unfixed Invoice: 1st March 2025 to 31st May 2025
Billing Rule: FIXED_PRORATA
Example: Yearly
- Service Created: 25th April 2025
- Billing Cycle: Yearly
Invoice Generation
- Pro Rata Invoice: 25th April 2025 to 30th April 2025
- Next Fixed Invoice: 1st May 2025 to 31st Dec 2025
Example: Quarterly
(Fixed quarters: Jan-Mar, Apr-Jun, Jul-Sep, Oct-Dec) In fixed prorated invoice gets generated for the created month's remaining days, and the next remaining days/month invoice gets generated until the end of the current quarter.
- Service Created: 25th Feb 2025
- Billing Cycle: Quarterly
Invoice Generation
- Pro Rata Invoice: 25th Feb 2025 to 29th Feb 2025
- Next Fixed Invoice: 1st March 2025 to 31st March 2025
Billing Rule: DATE TO DATE
Example: Yearly
- Service Created: 25th April 2025
- Billing Cycle: Yearly
Invoice Generation
- Full Invoice: 25th April 2025 to 24th April 2026 (generate -1 day)
Example: Monthly
- Service Created: 25th April 2025
- Billing Cycle: Monthly
Invoice Generation
- Full Invoice: 25th April 2025 to 24th May 2025 (generate -1 day)
Billing Rule: FIXED_CALENDAR_MONTH
Example: Yearly
- Service Created: 25th April 2025
- Billing Cycle: Yearly
Invoice Generation
- Full Invoice: 1st April 2025 to 31st Dec 2025
Billing Rule: UNFIXED_CALENDAR_MONTH
Example: Yearly
- Service Created: 25th April 2025
- Billing Cycle: Yearly
Invoice Generation
- Pro Rata Invoice: 1st April 2025 to 30th April 2025
- Next Fixed Invoice: 1st May 2025 to 30th April 2026
Conclusion
The Billing Rules section provides flexible invoice generation options to accommodate various service start dates and billing cycles. For billing rule configuration assistance, contact Stack Console support.