How to Calculate and Record Monthly DD&A for All Production Facilities Using the Units of Production Method
Recognizing monthly Depletion, Depreciation and Amortization on all producing assets using the UOP method tied to monthly production volumes.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| DD&A Expense (Production Facilities) | Expense (+) | 2,800,000.00 | - |
| Accumulated DD&A (Production Facilities) | Contra-Asset (+) | - | 2,800,000.00 |
💡 Accountant's Note
All capitalized development costs (platforms, pipelines, processing) are depleted using UOP. The rate is: (Net Book Value / Remaining Proved Developed Reserves) × Production Volume. High production months yield higher DD&A.
Practitioner & Systems Framework
💻 ERP Architecture
Maintain a single UOP cost pool per field (or CGU) combining all development assets: wells, platform, pipelines, processing, subsea infrastructure, and ARO asset. Calculate the UOP rate monthly: Total NBV of cost pool ÷ Remaining Proved Developed Reserves. Multiply by monthly production volume to get DD&A. Ensure the production denominator and numerator are in consistent units (barrels, or BOE for multi-product fields). Update the reserve estimate annually from the CPR and adjust the UOP rate prospectively.
⚠️ Audit Flags
The UOP rate is the central driver of oil and gas company earnings — a 10% downward reserve revision can increase DD&A by more than 10% (because the same NBV is spread over fewer remaining barrels). Auditors verify the reserve estimate, the production volume measurement, and the NBV used in the calculation. They also test that the UOP method is not being circumvented by using resource estimates (2P or 3P reserves) instead of proved developed reserves in the denominator.
📄 Required Documentation
Annual CPR (Competent Person's Report) confirming proved developed reserves, monthly production allocation report (gross and working interest net), UOP rate calculation workbook (NBV ÷ reserves = rate per BOE), monthly production × rate = DD&A, accumulated DD&A roll-forward, reserve reconciliation (opening + revisions + production - closing = current reserves), and multi-product BOE conversion factors.
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Expert Analysis by Qusai Ahmad
General Accountant Supervisor & IFRS Specialist
Specialized in SAP GUI automation and Middle Eastern tax compliance. Building digital tools for the next generation of finance leaders.
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