A cost allocation manual is the filing a regulated utility or telecommunications carrier submits to its oversight agency to prove that the money it earns from captive monopoly customers is not quietly funding its competitive ventures. Federal rule 47 C.F.R. § 64.901 prohibits carriers from using revenue from non-competitive services to subsidize competitive ones, and the manual is the mechanism regulators use to test compliance.1eCFR. 47 CFR 64.901 – Allocation of Costs Errors or omissions can produce rejected filings, ratepayer refunds, and failed biennial audits, so the document is worth building carefully the first time.
Who Has to File
The FCC requires a cost allocation manual from each incumbent local exchange carrier whose annual revenue from regulated telecommunications operations meets or exceeds an indexed threshold, with an exception for mid-sized incumbents.2eCFR. 47 CFR 64.903 – Cost Allocation Manuals The threshold starts at $100 million in 1992 dollars and is adjusted each year using the Department of Commerce GDP Chain-type Price Index. The FCC calculates it by multiplying $100 million by the ratio of the current year’s GDP-CPI to the seasonally adjusted October 19, 1992 index value of 100.69.3eCFR. 47 CFR 32.9000 – Glossary of Terms Inflation has pushed the current figure well above the original baseline.
Carriers below the threshold still must separate regulated and nonregulated costs in their accounting. They just are not required to file the full manual with the Commission.
On the energy side, FERC and state public utility commissions impose parallel cost-separation duties on electric and gas utilities, especially those with competitive affiliates. Triggers vary by jurisdiction. Any utility that provides both monopoly distribution service and competitive retail products should expect its regulator to demand a documented allocation framework.
The Rule the Manual Exists to Satisfy
Every part of the manual serves one purpose: preventing cross-subsidization. When one company sells both a monopoly service and a competitive one, captive ratepayers can end up quietly funding business bets they never agreed to. Section 64.901 states plainly that a carrier may not use non-competitive services to subsidize services subject to competition.1eCFR. 47 CFR 64.901 – Allocation of Costs The same regulation adds that universal service offerings should bear no more than a reasonable share of joint and common costs for the facilities used to deliver them.4eCFR. 47 CFR Part 64 Subpart I – Allocation of Costs
State commissions enforce the same principle for energy and water utilities. If a utility deploys its regulated workforce to install unregulated products without properly allocating the labor cost, the commission can order refunds and impose penalties.
What the Manual Must Contain
Section 64.903 sets the required contents. At a minimum, the manual must include a comprehensive organizational chart identifying every entity under the parent company’s control, a description of each entity’s business function, and a clear listing of which services are regulated and which are not.2eCFR. 47 CFR 64.903 – Cost Allocation Manuals These boundaries define the whole reporting framework.
Each service category must be supported by a full chart of the general ledger accounts used to record its expenses, capital investments, and revenue. The manual also has to describe internal accounting systems and the software used to track employee time and resource usage. The account descriptions need to be detailed enough that an auditor can trace any single expense from its ledger entry back to the original invoice. A manual that lacks that granularity risks rejection before regulators even reach the substance of the allocation methods.
Affiliate Transactions
Affiliate transactions get the closest scrutiny, and the manual must dedicate a section to them. Section 64.903 requires a statement identifying each affiliate that transacts with the carrier, along with the nature, terms, and frequency of every transaction.5eCFR. 47 CFR 64.903 – Cost Allocation Manuals Shared office space, shared vehicles, and shared administrative staff all have to be priced and divided in ways the manual can explain.
Proposed changes to affiliate transaction descriptions must be accompanied by a statement quantifying the financial impact on regulated operations, broken out in $100,000 increments at the account level.5eCFR. 47 CFR 64.903 – Cost Allocation Manuals That $100,000 threshold tells you how tightly regulators watch intercompany movements.
Asymmetric Pricing Between Regulated and Competitive Sides
Pricing for goods and services moving between a regulated utility and its competitive affiliates is deliberately one-sided. Under FERC’s affiliate restrictions for energy utilities, when a regulated utility with captive customers sells non-power goods or services to a competitive affiliate, the price must be the higher of cost or market value. When the affiliate sells to the regulated utility, the price cannot exceed market value.6eCFR. 18 CFR 35.39 – Affiliate Restrictions Captive ratepayers must never overpay when the utility buys from an affiliate, and the utility must never sell to an affiliate at a discount that pushes value out of the regulated ledger. If the utility rents office space to a competitive subsidiary, the manual has to document the square footage, the pricing formula, and how that formula meets the asymmetric standard.p>
How Costs Get Apportioned
Section 64.901 requires carriers to use the attributable cost method when separating regulated from nonregulated costs.1eCFR. 47 CFR 64.901 – Allocation of Costs In practice, that means a three-step hierarchy applied from most to least precise.
Direct Assignment
When a cost belongs entirely to one service, it is assigned there in full. A technician who works exclusively on regulated telephone lines has a salary assigned entirely to the regulated side. No formula, no judgment. NARUC calls direct assignment “always the optimum method” whenever a direct relationship exists between a cost and the service it supports.7National Association of Regulatory Utility Commissioners. Module III – Guidelines on Determining the Process for Allocating Costs Among Customer Classes
Causal Attribution for Shared Costs
Many expenses serve both regulated and competitive operations but can still be traced to a measurable driver. A customer service center handling calls for regulated electric billing and competitive home security sales splits its costs by call volume for each service. The driver could be square footage in a shared building, hours logged to a specific project, or transaction counts. It has to reflect actual usage rather than a convenient estimate, which is why time-reporting systems and activity tracking matter so much.
Indirect Allocation of Common Costs
Some expenses genuinely cannot be traced to any specific service. A CEO’s salary, corporate legal fees, and enterprise-wide accounting systems benefit the entire organization without belonging to any one part of it. NARUC describes these as “common to all rate classes but not directly connected to any single class.”7National Association of Regulatory Utility Commissioners. Module III – Guidelines on Determining the Process for Allocating Costs Among Customer Classes These are typically distributed using a general allocator based on the ratio of direct costs already assigned to each category, though regulators also accept allocators based on labor ratios, plant ratios, or a detailed account-by-account analysis.
The goal is to leave no expense unassigned. Every dollar in the books has to land on one side of the ledger or the other, through a method the manual documents and the carrier can defend.
The Biennial Audit
Filing a manual triggers an independent audit every two years covering the prior two-year period. The carrier can elect either an attest engagement or a financial audit, but either way it must be performed by an independent auditor. The initial engagement is due in the calendar year after the carrier first files its manual.8GovInfo. 47 CFR 64.904 – Independent Audits
In an attest engagement, the auditor issues a written opinion on whether the carrier’s systems, processes, and procedures comply with the FCC’s Joint Cost Orders and the relevant accounting rules, including §§ 64.901 and 64.903. The engagement must follow attestation standards established by the American Institute of Certified Public Accountants. The auditor has to submit the audit program to the Commission at least 30 days before beginning.8GovInfo. 47 CFR 64.904 – Independent Audits
On the state side, any jurisdictional regulatory authority may request its own independent attestation engagement of a utility’s manual. NARUC’s guidelines say the cost of these engagements should be shared between regulated and non-regulated operations consistent with how similar common costs are allocated.9National Association of Regulatory Utility Commissioners. Guidelines for Cost Allocations and Affiliate Transactions A utility cannot push the full cost of a compliance audit onto ratepayers if the audit also covers the competitive side of the business.
Filing, Updates, and Waivers
Most commissions accept electronic filings through dedicated portals, and submissions typically require a formal transmittal letter. A company officer generally has to certify the manual’s accuracy, which puts personal legal responsibility on leadership. Filing protocols vary by agency, so check the specific commission’s procedural rules before submitting.
The manual is not a one-time filing. Carriers must keep it current through regular updates and prompt filings whenever a significant organizational change occurs, such as launching a new competitive service, acquiring an affiliate, or completing a corporate merger. Changes to time-reporting procedures or affiliate transaction descriptions carry the heightened disclosure duty: each must be accompanied by a statement quantifying the financial impact on regulated operations in $100,000 increments at the account level.5eCFR. 47 CFR 64.903 – Cost Allocation Manuals A stale manual creates the inference that actual practices have drifted from documented procedures, which is often the first thing a challenger raises in a rate case.
Waivers
Carriers that believe a standard filing requirement is inequitable or unnecessary in their circumstances can ask the FCC for a waiver. The Commission may grant one if the carrier demonstrates either that applying the rule would frustrate its underlying purpose and a waiver would serve the public interest, or that unique factual circumstances make the rule unduly burdensome.10eCFR. 47 CFR 1.925 – Waivers The request must include a complete explanation of why the waiver is desired. If it is denied, the underlying filing is treated as defective unless it includes an alternative proposal that fully complies with the rules. Carriers seeking fast action should caption the request “WAIVER—EXPEDITED ACTION REQUESTED.”
Records Behind the Manual
Filing the manual is only the beginning. FERC-regulated utilities must retain the underlying workpapers and source documents for years after the entries are recorded. Under 18 C.F.R. Part 125, the periods depend on the type of record:
- Journal vouchers and supporting detail: 10 years.
- Analyses and computations supporting journal entries: 6 years for most accounts, or 25 years if the entry charges a plant account.
- Original invoices and paid vouchers: 5 years.
Records of services performed by and for affiliated companies must be detailed enough to readily furnish the nature of the transaction, the amounts involved, and the accounts used to record them. If a utility plans to reflect any of these costs in a current, future, or pending rate case, it must retain the records long enough to support the costs and adjustments it proposes, regardless of whether the standard retention period has expired.11eCFR. 18 CFR Part 125 – Preservation of Records of Public Utilities and Licensees
Protecting Sensitive Information in the Filing
A cost allocation manual contains pricing formulas, affiliate contract terms, and detailed operating costs. Companies filing with federal agencies can designate specific information as trade secrets or confidential commercial information under FOIA Exemption 4 at the time of submission. Designations expire after ten years unless the submitter requests a longer period.12eCFR. 32 CFR 1662.21 – FOIA Exemption 4
If someone files a public records request for designated material, the agency must notify the submitter and provide five business days to object. An objection needs a detailed written statement explaining why the information qualifies as a trade secret or confidential commercial data. If the agency decides to release the information over the submitter’s objection, it must issue a formal notice at least five business days before disclosure, giving the submitter time to seek a court order blocking release.12eCFR. 32 CFR 1662.21 – FOIA Exemption 4 State public utility commissions run their own confidentiality procedures, which vary widely. A federal confidentiality designation does not automatically carry over to a state filing.