Fuel Cost - Natural Gas Consumption at Gas-Fired Power Plant
Recording the consumption of natural gas as boiler fuel at a combined-cycle or simple-cycle gas-fired power plant, based on actual BTU consumption at the market or contract price.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Fuel Expense - Natural Gas (Gas-Fired Generation) | Expense (+) | 48,500,000.00 | - |
| Natural Gas Inventory (Consumed) | Asset (-) | - | 12,500,000.00 |
| Accounts Payable - Gas Supplier / Pipeline | Liability (+) | - | 36,000,000.00 |
💡 Accountant's Note
Fuel cost is typically the largest operating expense for a gas-fired generator. Natural gas cost = MMBtu consumed × price/MMBtu. The heat rate of the unit (BTU per kWh generated) determines fuel efficiency. Gas may be purchased in the spot market (day-ahead or real-time), under term contracts, or from storage inventory. Gas stored in underground storage is maintained as inventory. FERC Account 501 (Fuel) tracks fuel expense for regulated generators. For utilities with FCA mechanisms, fuel costs flow through the regulatory mechanism rather than directly to income.
Practitioner & Systems Framework
💻 ERP Architecture
FERC's Uniform System of Accounts for electric utilities specifies Account 501 for steam plant fuel. Track fuel consumption by generating unit, fuel type, and heat rate. The heat rate records (BTU/kWh) are maintained by plant operations and must reconcile to the fuel burn for financial reporting. Variance analysis (actual heat rate vs. design heat rate) identifies efficiency losses.
⚠️ Audit Flags
Auditors test fuel expense by tracing gas consumption records (metered BTU by interval) to pipeline delivery nominations and invoices. Significant heat rate degradation (higher BTU/kWh than expected) represents plant efficiency decline — auditors inquire about maintenance and capital investment needs. Fuel expense that appears inconsistent with reported generation output is a red flag.
📄 Required Documentation
Gas pipeline delivery statements, gas purchase contracts, volumetric and BTU-content data from pipeline, generation output records (MWh by unit), heat rate records, fuel inventory beginning/ending balance, FERC Account 501 entries.
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