4 Reasons Pennsylvania School Taxes Keep Rising as Enrollment Falls

Pennsylvania districts owe the state pension system 33.59% of payroll for 2026-27, a rate the PSERS board certified this year.

A district with $40 million in payroll owes about $13.4 million of that before it funds a single classroom.

This why Pennsylvania school taxes keep rising as enrollment falls.

Note: This is general information, not tax or legal advice. Property tax rules, pension contribution rates, and assessment cycles are subject to change.

1. Act 1’s Enrollment Blind Spot

Pennsylvania’s Act 1 law caps how much a school board can raise property taxes without putting the increase to a public vote.

That cap is called the base index, and the state recalculates it every year.

For the 2026-27 school year, the Pennsylvania Department of Education set it at 3.5%, down from 4.0% the year before and a recent high of 5.3% for 2024-25.

The index comes from blending two numbers: The statewide average weekly wage and a federal index tracking what public schools pay in salaries and benefits.

Neither number counts a single student.

Wages set it, not classrooms.

A district with more property wealth than resident income can even qualify for a higher ceiling, under a separate formula.

The size of that increase can grow for reasons that have nothing to do with enrollment at all.

That’s the base layer of the answer, and it applies the same whether a district’s kindergarten class doubles or empties out.

2. Pension Bills’ First Claim on New Money

Pennsylvania’s teacher pension system, the Public School Employees’ Retirement System (PSERS), sets a mandatory contribution rate that every district pays as a share of its payroll.

For fiscal year 2026-27, the PSERS board certified an employer contribution rate of 33.59% of payroll.

That’s a third of every payroll dollar.

None of it is optional.

They owe it for every employee still on staff, no matter what enrollment does.

Staffing rarely shrinks as fast as enrollment does, since a half-empty building still needs a full-time principal and a bus route.

So much of whatever extra revenue the Act 1 index allows is already spoken for before anyone counts a single student.

3. Charter Tuition's Rise as Districts Shrink

Pennsylvania's charter school law makes a district pay tuition for every one of its resident students who chooses a charter school instead.

The rate isn't a number the state sets from Harrisburg.

It's the district's actual spending from the prior school year, divided by its enrollment, after a few statutory carve-outs like transportation and debt service.

So when enrollment falls and spending doesn't fall just as fast, the per-student rate rises on its own, with no new law required.

The School District of Lancaster's 2024-25 rate ran to $16,776 for a regular education student, and $41,953 for a special education student.

Philadelphia shows the other side of the same math.

The city's district has lost roughly 16,500 students since the 2014-15 school year, while its cyber charter schools kept gaining students over that same stretch.

Every one of those newly enrolled cyber charter students still costs a shrinking district at that district's rising per-student rate.

The bill follows the student.

4. Counties' Rare Property Reassessments

Pennsylvania is one of a small handful of states that doesn't require its counties to reassess property values on any regular schedule.

Some counties go decades without touching their numbers, and Butler County's last full reassessment dates to 1969.

Some of those values have never been touched since.

When assessed values sit frozen, a school board's lever for raising more revenue becomes the millage rate, applied to those old values, not the values themselves.

A mill is just $1 of tax for every $1,000 of a property's assessed value.

A home assessed at $100,000 in a district taxing at 20 mills owes $2,000 a year in school property tax.

Raise that rate to 22 mills without touching the assessment at all, and the same home's bill rises to $2,200.

An Allegheny County judge ordered the county in August 2026 to complete its first reassessment since 2012, covering roughly 585,000 properties.

The process has to start by 2027 and finish by 2032, a 20-year gap between reassessments once it's done.

By law, a countywide reassessment is supposed to stay revenue-neutral, so the overall tax rate comes down to offset any jump in total assessed value.

In practice, individual school boards still set their millage rate afterward, and that's where a homeowner's actual bill takes shape.

A homeowner squeezed by that bill has other relief worth checking too, including heating assistance that many retirees never apply for.

The Rarely Used Voter Referendum

Pennsylvania school boards technically have another option when a proposed increase would exceed the Act 1 index: Put it to a public referendum.

Almost none of them do.

State law also lets the Pennsylvania Department of Education approve a narrow set of exceptions instead, for costs like special education and pension contributions.

For the 2022-23 school year, the department approved exceptions for just 12 districts statewide, 11 of them for special education costs.

So in a typical year, the Act 1 index itself decides how far a district's tax bill rises, not a public vote.

A district that stays under the index still raises taxes every year the state allows it, no matter how enrollment moves.

FAQ

These are the exact questions homeowners search once a Pennsylvania school tax bill goes up again.

Can Pennsylvania school districts raise property taxes without voter approval?

Yes, every district can raise taxes up to the state's Act 1 index each year without a vote.

Districts can also ask the Pennsylvania Department of Education for an exception to go higher, for costs like special education or pension contributions.

Why do Pennsylvania school taxes keep rising even when enrollment drops?

PSERS pension contributions and charter school tuition are calculated independently of enrollment.

The state recalculates the Act 1 index every year from wage and cost data, not district headcounts, so it applies whether enrollment rises or falls.

What is Pennsylvania's Act 1 index for the 2026-27 school year?

The Pennsylvania Department of Education set the base index at 3.5% for 2026-27, down from 4.0% the year before.

How often does Pennsylvania require counties to reassess property values?

Never on a set schedule. Pennsylvania is one of a small handful of states that doesn't require regular reassessments, so some counties go decades between them.

Does charter school tuition cost more per student when enrollment falls?

It can. Pennsylvania's charter tuition formula divides a district's actual prior-year spending by its enrollment, so the per-student rate rises when enrollment falls and spending doesn't fall just as fast.