What Is Fund Accounting? Fund Types, GASB/FASB, and Single Audit

Fund accounting is a system of tracking money that comes with strings attached. Instead of pooling all revenue into one set of books the way a business does, governments, public universities, hospitals, and charitable organizations split their finances into separate self-contained “funds.” Each fund is tied to a specific purpose and tracked on its own, so restricted dollars from a grant, a tax earmark, or a donor gift never get mixed with general operating cash. The point isn’t measuring profit. It’s proving that money went exactly where it was supposed to go.

Why the System Exists

A for-profit business answers one central financial question: did we make money? A government or nonprofit answers a different one: did we spend the money the way we were told to? That shift from profitability to accountability is the entire reason fund accounting exists.

When a state legislature dedicates gas tax revenue solely to highway maintenance, or a donor gives a university $2 million exclusively for scholarships, the receiving organization needs a way to prove those dollars never drifted into the general operating budget. The pressure comes from every direction at once. Federal grants carry detailed spending rules. Local property taxes may be earmarked for schools or parks. Private donations often include legally binding restrictions. A single municipality can juggle dozens of revenue streams, each with its own limitations. Standard commercial accounting, which lumps everything into one set of books, cannot demonstrate compliance with all of those separate mandates. Fund accounting solves the problem by giving each mandate its own ledger.

How It Differs From Commercial Accounting

The differences run deeper than organizational preference. Fund accounting uses a different measurement focus, different timing rules for recording transactions, and a different way of reporting what’s left over at the end of the year.

Measurement Focus

Commercial accounting uses what accountants call the economic resources measurement focus. It tracks everything, including long-term assets, long-term debts, and depreciation, to paint a complete picture of a company’s financial health over time. Governmental fund accounting flips that. It uses the current financial resources measurement focus, which cares only about what’s available to spend right now. Long-term assets like roads and bridges, and long-term obligations like pension liabilities, don’t appear in governmental fund statements at all. The question isn’t “what is this entity worth?” It’s “can this entity pay its current bills?”¹

There is an exception. Proprietary funds, which track government activities that operate like businesses, use the same economic resources focus and full accrual accounting a private company would use. Water utilities and public transit are the common examples. The financial question those funds answer is the same one a business answers: are revenues covering the cost of operations?¹

Basis of Accounting

Commercial entities use full accrual accounting. Revenue is recorded when it’s earned and expenses when they’re incurred, regardless of when cash actually changes hands. Most governmental funds use a variation called the modified accrual basis. Under modified accrual, revenue is recorded only when it’s both measurable and available, meaning the government can reasonably expect to collect it soon enough to pay current obligations. In practice, “soon enough” typically means within 60 days after the fiscal year ends. Expenditures are recorded when the related liability comes due. The system deliberately avoids the matching principle that commercial accounting relies on, producing a snapshot focused on near-term spending power rather than the full economic cost of providing services.

Fund Balance Instead of Equity

A commercial balance sheet reports owners’ equity, or what’s left after subtracting liabilities from assets. Fund accounting has no owners, so it replaces equity with “fund balance” for governmental funds and “net position” for government-wide and proprietary statements. These categories show how much of an organization’s remaining resources are freely available versus legally locked into a specific purpose. For nonprofits, a similar distinction splits net assets into those with donor restrictions and those without.

The Three Categories of Funds

The Governmental Accounting Standards Board (GASB) requires state and local governments to organize their funds into three broad categories: governmental funds, proprietary funds, and fiduciary funds.¹ Each uses a different accounting approach because each answers a different financial question.

Governmental Funds

Governmental funds cover most of the services people associate with government, including police, fire protection, parks, road maintenance, and general administration. They use the current financial resources measurement focus and modified accrual accounting. There are five types.

The General Fund is the main operating fund. It handles all financial resources not required to be tracked separately, such as payroll and office costs.²
Special Revenue Funds track money legally restricted to a specific operating purpose. A dedicated motor fuel tax that can only be spent on road maintenance is the classic example.²
Capital Projects Funds account for resources set aside to build or acquire major facilities like courthouses, bridges, or water treatment plants.²
Debt Service Funds accumulate resources for paying down long-term debt, including principal and interest on bonds.
Permanent Funds hold resources where the principal must stay intact but the investment earnings can be spent on programs that benefit the public. A donated endowment for park maintenance would let the city spend only the interest, never the original gift.¹

Proprietary Funds

Proprietary funds cover activities where the government charges fees for goods or services, operating in a way that resembles a private business. They use full accrual accounting and the economic resources measurement focus.¹

Enterprise Funds account for services provided to the public for a fee, such as municipal water systems, public transit, and airports. User charges are expected to cover costs, much like a private utility.²
Internal Service Funds handle services one government department provides to other departments on a cost-reimbursement basis, such as a central printing shop, an IT department, or a motor pool.²

Fiduciary Funds

Fiduciary funds hold resources the government manages on behalf of outside parties. The money in these funds cannot be used to support the government’s own programs. The government is acting as a trustee or custodian, not a spender.¹

Pension and Other Employee Benefit Trust Funds hold assets set aside for public employee retirement and benefit plans. These are among the largest fund balances in many state and local governments.²
Investment Trust Funds report the external portion of investment pools operated by the government for the benefit of other entities.
Private-Purpose Trust Funds account for trust arrangements that benefit specific individuals or organizations outside the government, such as an unclaimed property fund.
Custodial Funds cover fiduciary activities that aren’t governed by a formal trust agreement. A county that collects property taxes on behalf of a school district would report those collections in a custodial fund until they’re turned over.

Encumbrance Accounting

One feature of fund accounting has no real parallel in commercial accounting. When a government department issues a purchase order or signs a contract, the committed amount is recorded as an encumbrance, essentially a reservation against the fund’s remaining balance. The money hasn’t been spent yet, but it’s spoken for.

This matters because governmental budgets are legal spending ceilings, not just planning tools. Overspending a budget appropriation can be an actual legal violation, not a management problem. Encumbrances act as an early warning system. By reserving funds when a commitment is made rather than when the bill arrives, the accounting system shows how much is truly available for new spending at any point during the fiscal year. If a capital projects fund has already issued purchase orders consuming 90% of the appropriation, the encumbrance balance flags that before someone submits another requisition.

Encumbrances are not expenses. They don’t appear in the actual expenditure totals. But they do reduce the amount a department considers free to spend. For multi-year contracts, outstanding encumbrances carry over from one fiscal year to the next, keeping long-term commitments visible even when the cash won’t flow for months.

Who Sets the Rules

Two separate boards set the accounting standards for the organizations that use fund accounting, and which board applies depends on what type of entity you are.

GASB for Governments

State and local governments, including public universities, public hospitals, municipal utilities, and public retirement systems, follow standards issued by the Governmental Accounting Standards Board.³ GASB’s reporting model requires governments to produce two layers of financial statements, each telling a different story about the same organization.¹

Fund-level financial statements present each major fund individually, using modified accrual for governmental funds and full accrual for proprietary and fiduciary funds. They answer the budgetary compliance question: did each fund stay within its legal spending authority?

Government-wide financial statements consolidate all governmental and business-type activities into a Statement of Net Position and a Statement of Activities. Government-wide statements use full accrual accounting, which means they include the long-term assets and liabilities that the fund-level statements deliberately exclude. Together, the two layers give readers both a short-term compliance picture and a long-term economic picture.

Governments package these statements into an Annual Comprehensive Financial Report, or ACFR. The ACFR is the single document most commonly reviewed by bond rating agencies, auditors, and oversight bodies evaluating a government’s fiscal health.

FASB for Nonprofits

Private nonprofits, including charities, religious organizations, and private universities, follow standards set by the Financial Accounting Standards Board rather than GASB. The FASB reporting model is simpler. Nonprofits produce a Statement of Financial Position and a Statement of Activities, both using full accrual accounting. The critical reporting feature is how net assets are classified: either as net assets without donor restrictions, available for any organizational purpose, or net assets with donor restrictions, legally limited to a specific use or time period. That split gives donors a clear view of how much of the organization’s wealth is freely available versus earmarked.

Federal Compliance and the Single Audit

Any nonprofit or state or local government that spends $750,000 or more in federal awards during a fiscal year must undergo a Single Audit under the federal Uniform Guidance (2 CFR Part 200). This audit goes beyond the standard financial statement review. Auditors test whether the organization complied with the specific requirements attached to each federal program, from allowable costs to eligibility determinations to reporting deadlines.

The Office of Management and Budget publishes an annual Compliance Supplement that lists the compliance requirements for major federal programs and guides auditors on what to test.⁴ For organizations that receive federal grants, this is where fund accounting earns its keep. If your accounting system can’t demonstrate that federal dollars stayed in their designated fund and were spent only on allowable activities, audit findings can trigger repayment demands, loss of future funding, or referral for further investigation. Keeping each grant in its own fund with clean encumbrance and expenditure records is the primary defense against a costly finding.

What Happens When Restricted Funds Are Mismanaged

The consequences of mixing restricted funds with general operations, or spending restricted money on unauthorized purposes, range from administrative headaches to criminal prosecution. On the milder end, audit findings can require the organization to repay misspent funds from its own unrestricted resources, implement corrective action plans, and submit to additional monitoring. Federal grantors can suspend or debar organizations from future awards.

For public officials, the stakes are higher. Misappropriating public funds can lead to criminal charges carrying prison time, substantial fines, mandatory restitution, and permanent disqualification from holding public office. Officials may face both criminal prosecution and civil lawsuits at the same time. The severity varies by jurisdiction, but the underlying principle is consistent: public money held in trust is not discretionary, and diverting it is treated far more seriously than a bookkeeping error.

Nonprofit executives face parallel risks. Board members and officers have fiduciary duties to donors and beneficiaries. Spending donor-restricted funds on unrestricted purposes can trigger state attorney general investigations, loss of tax-exempt status, and personal liability. The accounting system itself, with properly maintained fund segregation and clear documentation, is the first line of defense.

1
Governmental Accounting Standards Board. Summary – Statement No. 34
2
National Center for Education Statistics. Financial Accounting for Local and State School Systems – Chapter 6 Account Classification Descriptions
3
Governmental Accounting Standards Board. GASB Statement No. 2 – Financial Reporting of Deferred Compensation Plans
4
The White House. Compliance Supplement