How are public libraries funded in New Jersey?

In New Jersey, public libraries are treated as civic infrastructure under state law. They are primarily funded by a mandatory municipal tax under N.J.S.A. 40:54-8, known as the “1/3 mill” formula: 33 cents for every $1,000 of a municipality’s equalized, or true, property value. This minimum must be raised annually for library operations, regardless of local budget pressures.

Many municipalities choose to fund their libraries above this minimum. Libraries often receive additional support from grants, donations, and Friends of the Library groups.

But in municipalities like Princeton, where developers are receiving tax abatements known as PILOTs, or Payments in Lieu of Taxes, that baseline funding can be slowly and quietly eroded.

Under a PILOT agreement, a developer pays the municipality an annual fee instead of conventional property taxes. These agreements can last up to 30 years. The fee is typically far less than what full taxation would generate, and it flows directly to the municipality. The county receives 5 percent. The library receives nothing.

That matters because the 1/3 mill formula runs on equalized property valuation, which is the total taxable value of assessed property in a municipality. When a large apartment complex receives a PILOT, the building’s value is exempt from assessment. Only the land beneath it remains on the tax rolls. A development worth $60 million might contribute the taxable equivalent of a modest vacant lot.

The result: as a town grows — new buildings rising, new residents moving in, new cardholders walking through the library’s doors — the funding formula can stagnate. The tax base the library depends on reflects a version of the town that no longer exists.

The gap has drawn some legislative attention. A 2022 bill proposed adding the value of PILOT-exempt properties back into the equalized valuation used for state aid funding calculations, an acknowledgment that the standard formula fails to account for the full scale of development in PILOT-heavy municipalities. The bill never made it out of committee.