AFUDC - Debt Component (Capitalized Interest on Construction Borrowing)
Recording the debt component of AFUDC, representing the actual interest cost of borrowings used to finance plant under construction, capitalized into CWIP and netted against interest expense.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Construction Work in Progress (AFUDC - Debt Added to Cost) | Asset (+) | 6,200,000.00 | - |
| Interest Expense - Reduced by AFUDC Debt (Net Presentation) | Expense (-) | - | 6,200,000.00 |
💡 Accountant's Note
The debt component of AFUDC is analogous to capitalized interest under ASC 835-20, but uses the FERC-specific formula rather than the GAAP specific borrowing method. The debt AFUDC rate reflects the cost of construction-period borrowings. This credit reduces reported interest expense — a significant benefit during large construction programs (nuclear plants, offshore wind, large gas plants). When the plant enters service, the accumulated debt AFUDC is included in rate base, allowing recovery through future rates. Unlike the equity component (other income), debt AFUDC appears as negative interest expense.
Practitioner & Systems Framework
💻 ERP Architecture
FERC requires the debt component of AFUDC to be calculated using specific funds borrowed for construction (if any exist) at those actual rates, with any excess construction funding calculated at the overall AFUDC rate. This requires coordination between treasury (tracking construction-specific borrowings) and accounting (applying the correct rate to CWIP).
⚠️ Audit Flags
Auditors verify that the AFUDC debt calculation uses the correct rate and CWIP base. Specific construction borrowings must be identified and excluded from the general AFUDC equity pool. Very large CWIP balances (multi-billion dollar nuclear or offshore wind projects) generate massive AFUDC — auditors spend significant time verifying the calculation.
📄 Required Documentation
AFUDC calculation workpaper (debt and equity components), construction-specific borrowing identification, FERC-authorized AFUDC rate components, CWIP balance by project and month, AFUDC income by component (equity vs. debt) for income statement presentation.
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