A proprietary fund reports a government's business-type or internal service activities using accrual accounting and an economic resources focus.
A proprietary fund is a U.S. state or local government accounting fund used for business-type activities or services supplied internally to government departments. Proprietary funds use the economic resources measurement focus and accrual accounting, making their statements structurally closer to business financial statements than governmental fund statements are.
There are two proprietary fund types: enterprise funds and internal service funds. The classification does not guarantee that an activity is profitable, self-sufficient, or free from tax support.
| Feature | Enterprise fund | Internal service fund |
|---|---|---|
| Primary customers | General public or external users | Departments or agencies of the same government |
| Typical activities | Water, sewer, transit, airport, or electric utility | Fleet, information technology, insurance, or central purchasing |
| Reporting role | Business-type activity | Cost-reimbursement service within government |
| Major-fund presentation | Major enterprise funds shown separately | Internal service funds generally combined in a separate column |
| Common analytical issue | Rate sufficiency and debt coverage | Allocation method and whether charges approximate cost |
An enterprise fund may be required when an activity is financed with debt secured solely by its net revenues, when laws or regulations require charges designed to recover costs, or when pricing policy is designed to recover costs. Exact classification depends on the applicable standards and facts.
Proprietary fund reporting uses the economic resources measurement focus and accrual basis. It therefore recognizes capital assets and long-term liabilities and reports expenses as resources are consumed, including depreciation.
The core statement relationship is:
Required proprietary fund statements generally include:
The cash flow statement is especially useful because accrual operating results do not show whether customer collections covered operating cash requirements or capital spending.
For fiscal years beginning after June 15, 2025, GASB Statement 103 provides definitions for operating and nonoperating revenues and expenses and requires a subtotal for operating income or loss and noncapital subsidies before other nonoperating items.
This matters because the old presentation could vary with each government’s policy. Analysts comparing periods should check whether Statement 103 has been adopted and whether prior-period captions were reclassified.
The new subtotal still is not a universal measure of economic self-sufficiency. A fund may rely on capital subsidies, transfers, taxes, or other resources outside charges for services.
Suppose a municipal water enterprise fund reports:
| Item | Amount |
|---|---|
| Charges for services | $48 million |
| Operating expenses excluding depreciation | ($35 million) |
| Depreciation | ($8 million) |
| Operating income | $5 million |
| Interest expense and other nonoperating items, net | ($3 million) |
| Capital contribution | $6 million |
The $5 million operating income indicates that recognized operating revenue exceeded operating expenses, including depreciation. It does not mean the fund generated $5 million of operating cash, nor does it show whether cash was sufficient for debt principal, construction, or reserve requirements.
The capital contribution increases net position but should not be mistaken for recurring customer revenue. An analyst would also inspect the statement of cash flows, debt covenants, rate policy, capital plan, and restricted assets.
| Issue | Proprietary fund | Governmental Fund |
|---|---|---|
| Main activity | Business-type or internal service | Tax-supported governmental service |
| Measurement focus | Economic resources | Current financial resources |
| Accounting basis | Accrual | Modified accrual |
| Capital assets in fund statements | Reported and depreciated | Generally not reported |
| Long-term debt in fund statements | Reported | Generally not reported |
| Residual | Fund net position | Fund balance |
| Flow terminology | Revenues and expenses | Revenues, expenditures, and other financing sources/uses |
For a debt-financed utility, also review the governing Revenue Bond documents. Covenant calculations can differ from GAAP operating income.
This article is general financial-reporting education, not accounting, audit, legal, municipal-credit, or investment advice. Review the current financial statements, notes, bond documents, and applicable standards for a specific fund.