What Are Proprietary Funds in Governmental Accounting?

Proprietary funds in governmental accounting are the fund type a state or local government uses to track activities that operate like a business, charging fees for goods or services instead of relying on tax dollars. They come in two varieties: enterprise funds, which sell to the public, and internal service funds, which sell to other departments within the same government. Under GASB Statement No. 34, both use full accrual accounting, so their financial statements look much like those of a private company.¹

Government accounting divides activity into three fund categories. Governmental funds cover tax-supported services like police, fire, and schools, and focus on budget compliance. Fiduciary funds hold money the government manages for others, such as pension assets. Proprietary funds fill the remaining space: operations where the government charges a fee and needs to know whether that fee actually covers the cost of delivering the service.²

The split exists because the two sides of government ask different questions. When property taxes pay for road repairs, the question is whether the money was spent as budgeted. When a city runs a water utility, the question is whether customer payments are enough to maintain the pipes, service the debt, and keep the system running for the long haul. Different questions, different accounting.

Enterprise Funds

Enterprise funds account for services the government sells to the general public. The familiar examples include municipal water and sewer systems, public transit, government-owned electric or gas utilities, airports, public hospitals, and solid waste operations. These activities tend to require heavy up-front capital investment and are expected to pay for themselves through user charges over time.

GASB requires an enterprise fund in certain situations. The most common trigger is debt structure: when an activity’s bonds are secured solely by a pledge of the revenue that activity generates, the accounting has to be isolated so bondholders can see how the revenue stream is performing.¹ Water system revenue bonds are the classic example. Investors need statements that show whether water fees cover debt service, and mixing those numbers into the general fund would obscure the picture.

An enterprise fund is also required when a law or regulation says the full cost of a service, including capital costs like depreciation, must be recovered through fees. Beyond those mandatory triggers, a government can elect to use an enterprise fund any time it prices a service at levels meant to cover costs. Many choose to do so because enterprise fund reporting makes it obvious whether a service is self-sustaining or quietly drawing resources from elsewhere.

The resulting statements tell a story taxpayers and bondholders both care about. Operating losses year after year signal that rates are too low to maintain the system. Healthy margins signal the opposite. Isolating the activity in its own fund is what makes that signal readable.

Internal Service Funds

Internal service funds handle the other half of proprietary accounting: services one department provides to other departments within the same government. The customers are agencies, not the public. Pooling these services in a single fund avoids duplication and gives every department an honest look at what its share of the shared service actually costs.

Common examples include:

Fleet management, where a central motor pool buys and maintains vehicles and charges departments a per-mile or per-vehicle rate.
Information technology, where one department handles hardware, software, and support for all agencies and bills each based on usage.
Self-insurance, where the government pools risk for property, liability, or employee health claims instead of buying commercial coverage.
Printing and mail services, where a central shop handles jobs for every department at a set rate.

The goal is cost recovery, not profit. Billing rates are generally set to break even over time. A fleet fund that piles up a large surplus has been overcharging and should cut rates in future periods. Chronic deficits mean rates are too low and the fund is being quietly subsidized, which defeats the point of tracking costs separately.

Accounting Basis and Measurement Focus

Proprietary funds use full accrual accounting and the economic resources measurement focus. Revenue is recorded when earned and expenses when incurred, regardless of when cash moves. All assets and liabilities appear on the balance sheet, including long-term items like buildings, equipment, and outstanding debt.¹ This is the same approach a private company uses.

One practical consequence: proprietary fund statements include depreciation. For a capital-intensive operation like a sewer system, leaving depreciation out would make the service look far cheaper than it really is. Including it forces decision-makers to see the long-term cost of maintaining the infrastructure, not just this year’s cash outlay.

Required Financial Statements

GASB Statement No. 34 requires proprietary funds to produce three financial statements.¹

Statement of Net Position

This is the balance sheet equivalent. It lists assets, liabilities, and the difference as net position, separating current from long-term items and showing restricted assets on their own line. Net position itself is split into three categories: net investment in capital assets (infrastructure and equipment minus related debt), restricted (money earmarked by law or external agreement), and unrestricted (everything else available for operations).

Statement of Revenues, Expenses, and Changes in Fund Net Position

This is the income statement. It separates operating revenues and expenses from non-operating items like interest income and grants, so the reader can see whether the core service activity is covering its own costs. Capital contributions, transfers, and special items sit below those lines, which lets a reader trace how net position changed during the year.

Statement of Cash Flows

This statement tracks actual cash in and out. GASB requires proprietary funds to use the direct method, which lists major categories of cash received and cash paid rather than starting from net income and reconciling back to cash.¹ That is a notable difference from private-sector practice, where the indirect method is standard. The direct method makes it possible to see exactly how much cash came from customers, how much went to suppliers, and how much was spent on capital projects. Cash flows are organized into four categories: operating, noncapital financing, capital and related financing, and investing. Separating capital financing from other borrowing lets readers evaluate infrastructure spending on its own.

How Proprietary Funds Differ from Governmental Funds

The clearest way to see the difference is to look at the question each fund answers. Governmental funds ask whether the government followed the budget and has enough cash to pay this year’s bills. Proprietary funds ask whether an activity is paying for itself and whether the capital behind it is being maintained.

Those questions drive different accounting. Governmental funds use modified accrual accounting and the current financial resources measurement focus, recording revenue only when it is measurable and available to pay current obligations.¹ Their balance sheets show only short-term assets and liabilities. A new fire truck bought with general fund money appears as an expenditure in the year of purchase and then disappears from the governmental fund statements. The truck still exists; the governmental fund has simply moved on, because its job is to track spendable resources.

A proprietary fund would capitalize that same vehicle and depreciate it over its useful life, with long-term debt sitting on the balance sheet as a liability. The result is a complete economic picture that governmental fund statements deliberately leave out. Neither approach is wrong. Budget compliance needs a short-term cash lens; business-type operations need the full accrual treatment to show whether they are genuinely covering their costs.

How They Appear in Government-Wide Statements

Beyond the fund-level statements, every government also prepares government-wide financial statements that consolidate everything into two columns: governmental activities and business-type activities. Enterprise fund data flows into the business-type activities column. Internal service fund data is usually folded into governmental activities, because those funds mostly serve other government departments and their costs ultimately land in other government programs.¹ So while both enterprise and internal service funds are proprietary at the fund level, only enterprise funds show up on the business-type side of the consolidated view. That is a common point of confusion worth keeping straight when reading an annual financial report.

1
GASB. Summary – Statement No. 34
2
National Center for Education Statistics. Financial Accounting for Local and State School Systems 2014 Edition – Chapter 4 Governmental Accounting Fund Structure