Unbilled Revenue Accrual - Electricity Delivered But Not Yet Billed (Cycle Billing)
Accruing revenue for electricity delivered between the last meter reading date and fiscal period-end, representing usage that has occurred but will not be billed until the next meter reading cycle.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Unbilled Revenue Receivable (Accrued) | Asset (+) | 145,000,000.00 | - |
| Electric Revenue - Unbilled (Accrued) | Revenue (+) | - | 145,000,000.00 |
💡 Accountant's Note
Because meters are read on a staggered cycle (different customers read on different days throughout the month), a portion of delivered electricity at month-end has not yet been billed. This 'unbilled revenue' is a significant accrual — for a large electric utility, it can represent 10%–20% of monthly revenue. The accrual is estimated using: average days of unbilled service per customer class × average daily revenue rate. Upon next billing, the unbilled receivable is reversed and replaced with a billed receivable. This is a recurring entry that reverses and re-accrues each period.
Practitioner & Systems Framework
💻 ERP Architecture
Most utility billing systems calculate the unbilled accrual automatically based on meter read dates, tariff rates, and estimated usage patterns for the unbilled period. The estimate uses actual degree-days and customer count for weather-sensitive residential loads. The unbilled accrual is one of the largest estimates on a utility's balance sheet — changes in the methodology can have material income impacts.
⚠️ Audit Flags
Auditors test the unbilled revenue accrual by: (1) Comparing the accrual methodology to prior periods for consistency, (2) Testing the degree-day and usage assumptions against weather data, (3) Tracing the subsequent month's billing to verify the accrual was reasonable, (4) Reconciling unbilled estimates to actual billing in the following period. The unbilled reversal/re-accrual cycle must be documented.
📄 Required Documentation
Billing system unbilled accrual calculation report, average daily usage by customer class, degree-day data from weather service, customer count by class and meter read date, subsequent period billing vs. prior accrual reconciliation, methodology documentation.
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