Public schools in the United States are funded by a mix of local property taxes, state sales and income taxes, and federal grants. In the most recent federal data covering the 2022–23 school year, state sources supplied about 45 percent of total K–12 revenue, local sources about 42 percent, and the federal government roughly 13 percent.1National Center for Education Statistics. Public School Revenue Sources Those shares shift with where a district sits and how wealthy its tax base is, but the three-tier structure applies everywhere.
Property Taxes Are the Local Backbone
Property taxes are the single largest tax source for public schools, accounting for about 36 percent of all K–12 revenue nationwide.1National Center for Education Statistics. Public School Revenue Sources Smaller local streams round out the local share: fees for school meals and athletics, local option sales taxes, and contributions from individuals or organizations. Because property values vary enormously across communities, the revenue a district can raise from this one tax varies enormously too, which is the root of most school-funding inequality debates.
The mechanics are straightforward. A county or municipal assessor determines the market or assessed value of every parcel of residential and commercial real estate. A school board then sets a tax rate, often expressed in mills, where one mill equals one dollar per thousand dollars of assessed value. A millage of 20 mills means a homeowner whose property is assessed at $200,000 owes $4,000 in school taxes that year. The money stays in the district and pays primarily for teacher salaries, classroom supplies, utilities, and day-to-day operations.
Property taxes are considered a stable funding source compared with taxes that ride on consumer spending or employment. If a homeowner fails to pay, the local government can place a lien on the property and eventually foreclose to recover what’s owed.
What Shrinks the Local Tax Base
Not every dollar of property value in a district is actually taxable. Homestead exemptions, offered in some form by nearly every state, reduce the assessed value of a primary residence before taxes are calculated. Some programs target seniors on fixed incomes, veterans, or people with disabilities; others apply to all homeowners. In communities with large senior populations, these exemptions can meaningfully shrink the base schools draw from.
Tax Increment Financing districts create a different gap. When a city designates a TIF zone to encourage redevelopment, property tax revenue from rising values inside that zone is redirected to pay off redevelopment costs instead of flowing to the school district. The district continues to receive taxes based on pre-development values, but the growth is locked away. Some states backfill the loss with extra state aid, but not all do, and backfill amounts don’t always keep pace.
Commercial tax abatements work similarly. When a city offers a business a multi-year tax break to locate in the community, the school district often absorbs part of the loss because its share of the levy is the largest. School boards in some states have the legal right to opt out of a proposed abatement, but the political pressure to attract jobs makes that uncommon.
Voter-Approved Bonds Are a Separate Layer
Operating money and construction money are legally separate. A district cannot spend property tax revenue earmarked for operations on a new gymnasium, and bond money raised for construction cannot be redirected to pay teacher salaries.
When a district needs to build or renovate, it typically issues general obligation bonds, which are long-term debt repaid through a dedicated property tax levy. In most states, voters must approve those bonds at a referendum. The threshold varies: some states require a simple majority, others a three-fifths or two-thirds supermajority, and a handful of states don’t require a public vote at all. Once bonds are issued, the county adds a separate line to homeowners’ tax bills for annual principal and interest. That levy is legally distinct from the operating millage and can exceed normal rate caps precisely because voters authorized it. Bond terms often stretch 20 to 30 years, so a project approved today can appear on tax bills for decades.
State Sales and Income Taxes Do the Heavy Lifting
State governments collectively contribute the largest share of school funding, about 45 percent nationally in the most recent data.2Institute of Education Sciences. Revenues and Expenditures for Public Elementary and Secondary Education School Year 2022-23 Most of it comes from two workhorses: general sales taxes and personal income taxes. Both are deposited into a state’s general fund and then appropriated to education by the legislature.
Statewide sales tax rates on retail purchases run from about 2.9 percent to 7.25 percent across the 45 states that impose one; five states collect no statewide sales tax at all. Personal income taxes capture a percentage of worker earnings on a graduated scale, with higher earners paying a larger share. Corporate income taxes pull a portion of business profits into the same pool. Together, these give states the flexibility to redistribute money from wealthier regions to districts that can’t generate much locally.
The trade-off is volatility. Sales and income taxes rise and fall with the economy in a way property taxes don’t. In a recession, consumer spending drops and unemployment rises at the same time, cutting into both revenue streams at once. Rainy-day funds and budget stabilization reserves are meant to bridge those short-term gaps, though the rules governing when and how much a state can tap them vary widely. Districts that lean heavily on state aid are the most exposed when reserves run thin.
Lottery and Excise Revenue
About 45 states run government lotteries, and many earmark a portion of the proceeds for education. Nationally, lotteries transfer roughly 24 percent of ticket-sale revenue to designated beneficiaries, but not all of that money goes to K–12 schools; some states direct lottery funds to higher education, environmental programs, or general government. The share dedicated to public schools varies enormously by state.
Excise taxes on tobacco, alcohol, and in some states marijuana also generate earmarked revenue that legislatures can direct toward education. These streams are smaller and less predictable than sales or income taxes, and they can decline over time if public health campaigns reduce tobacco and alcohol consumption.
The biggest misconception about lottery and excise revenue is that it represents additional money on top of what schools would otherwise receive. In practice, legislators often treat these earmarked dollars as a substitute, reducing general-fund appropriations by roughly the amount the lottery brings in. Total education spending stays about the same; only the funding source shifts.
How States Distribute Money to Districts
Collecting taxes is only half the job. The harder question is how a state divides the money among districts with vastly different needs and resources. Most states use some version of a foundation formula: the legislature sets a minimum dollar amount it believes should be spent per student, calculates how much each district can raise locally through property taxes, and sends a state check to cover the gap.3Institute of Education Sciences. Weighted Student Funding Is On The Rise – Heres What We Are Learning A property-rich district may receive little or no state aid because it can meet the minimum on its own. A property-poor district may draw the majority of its budget from the state.
Many states layer weighted student funding on top of the foundation amount. Under these models, a student who is learning English, living in poverty, or receiving special education services generates more dollars than a general-education student. The weight for English language learners ranges from an extra 10 percent to 70 percent above the base, depending on the state. Two-thirds of districts that use weighted formulas include weights for English learners and students with disabilities, and about half include a weight for poverty.
Federal law also imposes a maintenance-of-effort requirement: states receiving certain federal education grants must keep their own spending at or above historical levels. Cut too far while accepting federal money, and the state risks losing the federal funds entirely.4U.S. Department of Education. Frequently Asked Questions on the Maintenance-of-Effort Requirements Applicable to the CARES Act Programs Hold-harmless provisions add another guardrail, preventing a district’s allocation from dropping more than 5 to 15 percent below the prior year’s level even if enrollment declines.5eCFR. 34 CFR 200.73 – Applicable Hold-Harmless Provisions
Federal Grants: Title I, IDEA, and Impact Aid
The federal share is the smallest of the three tiers, but it targets students with the greatest needs. Historically, federal money accounts for about 8 to 11 percent of K–12 revenue, though the figure spiked near 13 percent in the early 2020s because of pandemic relief funds that are now winding down.1National Center for Education Statistics. Public School Revenue Sources
Title I of the Elementary and Secondary Education Act, most recently reauthorized by the Every Student Succeeds Act in 2015, is the largest federal K–12 program.6Congress.gov. The Elementary and Secondary Education Act (ESEA), as Amended by the Every Student Succeeds Act Title I Part A received an appropriation of roughly $18.4 billion in fiscal year 2024 and reaches approximately 60,000 schools.7U.S. Department of Education. Title I, Part A – Improving Basic Programs Operated by Local Educational Agencies The grants flow to schools with high concentrations of students from low-income families and support additional instructional staff, tutoring, and academic intervention.8U.S. Department of Education. Title I
The Individuals with Disabilities Education Act funds special education services through formula grants to states. IDEA was designed with a promise that the federal government would cover up to 40 percent of the extra cost of educating students with disabilities, but appropriations have never come close and currently cover closer to 12 percent.9U.S. Department of Education. Individuals with Disabilities Education Act (IDEA) The gap between the promise and the check is one of the largest unfunded mandates in public education, and state and local budgets absorb the difference. Districts must still comply with detailed federal requirements for individualized education programs, assistive technology, and specialized instruction regardless of how much federal money arrives.
Impact Aid compensates roughly 1,000 school districts that serve concentrations of students connected to federal property, including military bases and tribal lands.10U.S. Department of Education. FY 2024 Congressional Justification – Impact Aid Because federal land is exempt from local property taxes, those districts lose part of their tax base, and Impact Aid fills part of the hole. Funding weights vary based on the student’s connection to the federal property; students living on tribal lands, for example, carry a higher weight than students whose parent works on a military installation.11Impact Aid Grant System. Section 7003 Basics
Education Savings Accounts Reroute Some State Dollars
A growing number of states now redirect some state education money away from public districts and into Education Savings Accounts that families use for private school tuition and other approved expenses. As of mid-2025, 18 states had established ESA programs, and 12 of those offered universal eligibility rather than restricting the accounts to specific populations such as students with disabilities or low-income families.
The fiscal mechanics matter for anyone trying to understand school funding. When a student leaves a public district for an ESA-funded private school, the per-pupil state aid that would have followed that student to the public school is deposited into the family’s ESA instead. The district loses the revenue but doesn’t immediately shed the fixed costs of running buildings and paying staff. Students who were already enrolled in private school before the program launched represent entirely new costs to the state, because they weren’t previously generating per-pupil public-school allocations. Whether ESA programs help or hurt public school finances is one of the most contested questions in education policy right now, and the answer depends heavily on program design, enrollment patterns, and whether the state adjusts its formula to cushion the transition.
Why Per-Pupil Spending Varies So Much
All of these tax sources add up to dramatically different totals depending on where a student lives. Average per-pupil spending across the 50 states runs from roughly $9,400 at the low end to over $33,000 at the high end, with a national average around $12,600. The gap reflects differences in local property wealth, state tax capacity, cost of living, and the political willingness of voters and legislators to invest in schools.
Even within a single state, spending can vary significantly between neighboring districts. Foundation formulas and weighted funding are designed to narrow those gaps, but they rarely eliminate them. A district with a booming commercial tax base and an affluent residential population will almost always outspend a rural district where property values are low and state aid, while proportionally larger, doesn’t fully close the distance. Federal grants add a targeted layer, but at roughly a dime of every education dollar, they aren’t large enough to equalize spending on their own.