Why is recognized revenue negative for a single day on a usage-based invoice with a credit note?

When a credit note is issued against a usage-based invoice, you may see recognized revenue dip below zero on individual days inside the credit note's service period. This is expected behavior and reflects the difference between how usage revenue and credit notes are recognized over time.

How recognized revenue is calculated

For a usage-based invoice, revenue is recognized daily based on the actual usage that occurred on each day. Because usage varies, the recognized revenue per day also varies, sometimes by a large amount.

A credit note, in contrast, is prorated evenly across its service period. The full credit amount is divided by the number of days in the service window, and the same flat daily amount is subtracted on every day inside that window.

The net recognized revenue for a day is the daily usage revenue minus the daily prorated credit.

What you'll see

For a service period of April 1 to April 30 (31 days) and a credit note of $200, the credit prorates to roughly -$6.45 per day across the full window.

The usage revenue, however, fluctuates day by day. For example:

• Mar 1: usage $5 minus credit $6.45 = -$1.45 (negative)

• Mar 2: usage $10 minus credit $6.45 = $3.54 (positive)

On any day where the daily usage revenue is lower than the flat daily credit, the net for that day is negative. On higher-usage days, the net is positive.

Why this happens

The two components of the net figure are recognized on different schedules by design:

• Usage revenue follows the actual usage curve, so it tracks real consumption.

• Credit notes are prorated linearly, because there is no usage signal tied to the credit itself.

When you combine a non-linear (usage) series with a linear (prorated credit) series, the daily difference will swing positive or negative depending on whether usage on that day was above or below the average. The total across the service period still nets out to the correct figure; it's only the per-day breakdown that can show negative values.

Summary

Negative recognized revenue on a single day inside a credit note's service period is a normal side effect of evenly prorated credits applied against day-by-day usage revenue. The totals reconcile correctly across the full period; the per-day view simply reflects that some days had less usage than the flat daily credit being applied.