FIXED_CALENDAR_MONTH
FIXED_CALENDAR_MONTH aligns the first invoice to calendar period boundaries from the start of the creation month or year — without a separate daily pro-rata for partial days in the creation month.
Quick start
| Rule | Behaviour |
|---|---|
| Alignment | Calendar month or year boundaries |
| Pro-rata days | Not split daily — period starts at calendar boundary |
| Typical use | Yearly billing aligned to calendar year |
Yearly example
| Service created | 25 Apr 2025 |
| Billing cycle | Yearly |
| Invoice period |
|---|
| 1 Apr 2025 → 31 Dec 2025 |
The first invoice covers from the start of the creation month (or configured calendar boundary) through the end of the calendar year — not from the exact creation date.
Comparison with other rules
| Rule | Service created 25 Apr 2025 (yearly) | First invoice period |
|---|---|---|
| FIXED_CALENDAR_MONTH | Calendar-aligned | 1 Apr 2025 → 31 Dec 2025 |
| FIXED_PRORATA | Daily pro-rata + remaining months | Pro-rata Apr 25–30 + full months to year end |
| DATE_TO_DATE | Creation anniversary | 25 Apr 2025 → 24 Apr 2026 |
| UNFIXED_CALENDAR_MONTH | Pro-rata month + rolling year | Pro-rata Apr 1–30 + May 2025 – Apr 2026 |
Supported billing cycles
Monthly, quarterly, semi-annual, yearly, bi-annual, and tri-annual — see Billing Rules — cycle support.