Account For Proprietary Funds

Historical Context & Motivation

Governmental accounting in the United States has long grappled with a fundamental tension: how should public entities account for activities that resemble private-sector business operations? For much of the twentieth century, state and local governments used a patchwork of accounting approaches that made it difficult to assess the true cost and financial performance of revenue-generating services such as water utilities, public transit systems, and municipal airports. The concept of proprietary funds emerged as the solution—a category of fund types designed to capture the economic substance of government activities that charge fees for services, mirroring the full accrual accounting framework used by for-profit enterprises.

The evolution of proprietary fund accounting reflects broader shifts in governmental accountability and transparency. Before the establishment of the Governmental Accounting Standards Board (GASB) in 1984, standards were set by the National Council on Governmental Accounting (NCGA), which began formalizing fund classifications in the mid-twentieth century. The push toward accrual-based reporting for business-type activities arose from citizen demands for clearer information about whether public utilities and services were financially self-sustaining or required subsidization from tax revenues.

The central question that proprietary fund accounting addresses is both practical and philosophical: when a government operates activities that function like a business—charging customers for water, electricity, or parking—should those activities be measured using the same economic resources measurement focus and accrual basis that private companies use? The answer, as codified under GASB standards, is unequivocally yes. This framework enables stakeholders to evaluate whether fee-supported services are covering their full costs, including depreciation and long-term liabilities, rather than masking true costs behind modified accrual conventions.

Core Principles & Definitions

Proprietary funds occupy a distinctive position within the governmental fund structure. While governmental funds (such as the General Fund and Special Revenue Funds) use the modified accrual basis and current financial resources measurement focus, proprietary funds adopt the economic resources measurement focus and the full accrual basis of accounting. This means all assets and liabilities—both current and long-term—are recognized, revenues are recorded when earned, and expenses are recognized when incurred, regardless of when cash changes hands.

Visual Explanation — Fund Structure Overview

Understanding where proprietary funds fit within the larger governmental fund taxonomy is essential. The following diagram illustrates the three major fund categories—governmental, proprietary, and fiduciary—and highlights the two proprietary fund types alongside their measurement focus and basis of accounting.

Notice that proprietary funds share the accrual basis with fiduciary funds, but the critical distinction lies in purpose: fiduciary funds hold resources in a trustee or custodial capacity for parties outside the government, while proprietary funds account for the government's own business-type and internal service operations. For CPA FAR exam purposes, always remember that enterprise funds report in the business-type activities column of the government-wide statements, while internal service funds are typically rolled into the governmental activities column because their predominant customers are usually other governmental departments.

How Proprietary Fund Accounting Works

The mechanics of proprietary fund accounting closely parallel commercial enterprise accounting, though certain governmental nuances apply. Understanding the key equations, revenue/expense classifications, and net position categories is fundamental to mastering this topic for the CPA FAR exam.

The Accounting Equation for Proprietary Funds

Net Position Categories

Revenue & Expense Classification

A critical distinction in proprietary fund accounting is the classification of revenues and expenses as operating versus nonoperating. GASB does not provide a single bright-line definition; instead, the government must establish and consistently apply a policy. Generally, operating revenues derive from the fund's principal ongoing operations (e.g., water charges for an enterprise fund), while nonoperating items include interest revenue, interest expense, grants, capital contributions, and gains or losses on asset disposals. Distinguishing operating from nonoperating items is heavily tested on the CPA exam.

Statement of Cash Flows — Direct Method

Unlike private-sector entities that may choose between the direct and indirect methods, GASB requires proprietary funds to use the direct method for the statement of cash flows. Additionally, governmental proprietary fund cash flows are classified into four categories—not three as in commercial accounting. The four categories are: (1) operating activities, (2) noncapital financing activities, (3) capital and related financing activities, and (4) investing activities. Interest paid on revenue bonds for capital assets falls under capital and related financing activities, while transfers from the General Fund to subsidize operations appear under noncapital financing activities.

Detailed Breakdown — Enterprise vs. Internal Service Funds

While enterprise funds and internal service funds share the same accounting basis, they differ substantially in their purpose, reporting treatment, and the criteria for their use. The following diagram provides a side-by-side comparison of these two proprietary fund types, emphasizing the nuances that are frequently tested on the CPA FAR exam.

Major Fund Determination for Enterprise Funds

Under GASB 34, an individual enterprise fund is reported as a major fund if it meets both the 5% and 10% criteria. First, total assets plus deferred outflows, liabilities plus deferred inflows, revenues, or expenses must be at least 5% of the corresponding totals for all governmental and enterprise funds combined. Second, the same element must be at least 10% of the corresponding total for all enterprise funds alone. Any enterprise fund not meeting these thresholds is aggregated into "Other Enterprise Funds." The government may also designate any fund as major if it believes separate presentation is important for user decision-making. Internal service funds, however, are never reported as major funds; they are presented in a single aggregated column in the proprietary fund statements.

Worked Example — Enterprise Fund Transactions

The City of Riverdale operates a Water Utility Enterprise Fund. During fiscal year 2024, the following transactions occurred. We will record each transaction and then trace the effects through the three required financial statements.

Proprietary Funds vs. Governmental Funds — Key Differences

One of the most heavily tested areas on the CPA FAR exam is the ability to distinguish how identical transactions are treated differently across fund types. The following table contrasts proprietary fund accounting with governmental fund accounting across critical dimensions.

Connection to Government-Wide Statements & Advanced Issues

Proprietary fund accounting does not exist in isolation; it connects directly to the government-wide financial statements required by GASB 34. The government-wide Statement of Net Position and Statement of Activities present all governmental and business-type activities on the accrual basis. Because proprietary funds already use accrual accounting, their data requires minimal conversion for incorporation into government-wide statements. By contrast, governmental fund data must undergo significant adjustments—adding back capital assets, removing current-year capital expenditures, recognizing long-term liabilities, and adjusting for modified accrual timing differences.

Internal Service Fund Elimination Issues

A particularly nuanced topic involves internal service fund profit elimination. When an ISF charges governmental funds a markup above cost—for instance, a central motor pool that charges departments 10% above its actual fleet costs—the overcharge inflates governmental fund expenditures and creates an artificial profit in the ISF. At the government-wide level, this internal profit must be eliminated so that governmental activities expenses reflect actual costs, not inflated interdepartmental billings. This elimination appears as an adjustment on the reconciliation schedule between fund-level and government-wide statements, a topic that surfaces regularly in CPA FAR exam simulations.

GASB 87 — Leases and Proprietary Funds

Recent GASB pronouncements continue to affect proprietary fund reporting. GASB Statement No. 87 on leases requires proprietary funds to recognize a right-to-use lease asset and a lease liability for most leases with terms exceeding 12 months. This parallels the FASB ASC 842 model for private companies but uses a single-model approach (all leases are treated similarly). Additionally, GASB 96 addresses subscription-based information technology arrangements (SBITAs), requiring recognition of an intangible right-to-use asset and a corresponding liability—particularly relevant for internal service funds providing IT services.

Practice Problems

Lesson Summary