Recent Changes to Illinois TIF Law That Affect Your Development Timeline

The Illinois General Assembly and state courts have been actively reshaping the Tax Increment Allocation Redevelopment Act in recent years, with decisions and legislation that carry direct implications for how developers plan and execute projects within TIF districts.

For projects that rely on TIF funding for infrastructure, site preparation, or financing structure, understanding these changes is essential for realistic timeline and budget modeling.

The developments below represent the most significant changes to Illinois TIF law in recent years, along with their practical implications for development timelines in Cook, Lake, and DuPage County.

Public Act 102-818

In 2022, the General Assembly enacted Public Act 102-818, which amended the TIF Act and other economic development statutes to align contiguity requirements for TIF districts with those applicable to municipal annexations under the Illinois Municipal Code.

Background: The Richland School District Decision

The amendment directly addressed the Illinois Supreme Court’s decision in Board of Education of Richland School District No. 88A v. City of Crest Hill, 2021 IL 126444, which invalidated a TIF district created by the City of Crest Hill because properties within the district were not sufficiently contiguous under a strict reading of the TIF Act. The court held that the TIF Act did not expressly incorporate the contiguity exceptions available under the Municipal Code’s annexation provisions.

What the Amendment Does

Under the amended TIF Act:

• New contiguity standard: If properties are contiguous for municipal annexation purposes, they are sufficiently contiguous for TIF Act purposes.
• Retroactive application: The legislation applies to TIF districts created prior to the amendments.
• One exception: The district struck down in the Richland School District case is not covered.

Development Impact: The contiguity amendment provides greater certainty for projects within existing TIF districts and expands the range of sites that can be included in new TIF districts. For developers, this reduces the risk that a TIF designation could be invalidated mid-project on contiguity grounds.

The Shiloh Decision: TIF Duration Clarified

The Illinois Appellate Court’s decision in Village of Shiloh v. County of St. Clair, 2023 IL App (5th) 220459, resolved a significant question about how the 23-year TIF term is calculated.

The Village of Shiloh established two TIF districts in 1998. At the end of the districts’ lives, St. Clair County refused to pay the final year of incremental property taxes, arguing that the TIF Act permitted only 23 annual increment payments. The Village argued it was entitled to 24 annual payments, because the TIF Act authorizes districts to allocate incremental property taxes for up to 23 full calendar years beginning the January 1 after the district was created.

The Appellate Court sided with the Village, confirming that:

• A TIF district may have a term of 23 full years after the year it was created
• Municipalities are entitled to 24 annual increment payments for such districts — one for the first partial year plus 23 for each full year thereafter

Development impact: For developers relying on TIF funding structured as pay-as-you-go reimbursement or bond-supported obligations, the Shiloh decision confirms the full duration of increment revenue available to fund redevelopment costs. This affects the financing structure and long-term cash flow modeling for projects within existing districts.

Continued TIF Term Extensions by the General Assembly

An extension of a TIF district term beyond the statutory 23-year maximum, whether to 35 years or 47 years, requires a specific amendment to the TIF Act.

Since the TIF Act’s creation, the General Assembly has authorized:

• 286 extensions to 35 years
• 24 extensions to 47 years

Recent Legislative Activity

In the spring 2025 legislative session, House Bill 3662 extended the terms of 10 TIF districts across eight municipalities, including:

• City of Carbondale
• City of Elgin
• Village of Lyons

Although not required by statute, the General Assembly typically expects municipalities seeking a term extension to present letters of support from the taxing bodies substantially affected by the TIF, including school districts and park districts.

Development Impact: For projects in mature TIF districts approaching the end of their statutory terms, the possibility of a legislative extension can be significant to project economics. However, extensions are neither automatic nor guaranteed, and the political process requires coordination with the host municipality and affected taxing bodies well in advance of the district’s expiration date.

TIF Proposals That Did Not Advance

Several proposed TIF amendments were introduced in the 2025 spring session but failed to advance.

Developers should still monitor these proposals, as they may be reintroduced in future sessions:

• Senate Bill 1432 would have required all surplus TIF district funds to be distributed as soon as possible after calculation, rather than within 180 days after the close of the municipality’s fiscal year. The change would have accelerated the return of surplus funds to overlapping taxing bodies.
• House Bill 3266 would have applied Prevailing Wage Act requirements to all private projects located in a TIF district and paid for in whole or part with public funds, with exceptions for projects under $25,000 and for projects in designated historic districts.
• House Bill 3693 would have reduced the term of TIF districts established on or after July 1, 2025 from 23 years to 15 years.

The prevailing wage proposal in particular would have materially affected construction costs for TIF-funded development. Although it did not advance, similar proposals may return in future legislative sessions.

Practical Implications for Development Timelines

The cumulative effect of these legislative and judicial developments is a TIF landscape that continues to evolve in ways that affect project planning:

• Extended due diligence. Developers evaluating sites within or adjacent to TIF districts should confirm the district’s status, remaining term, and any pending legislative action that could affect its duration or financial structure.
• Redevelopment agreement scrutiny. Agreements with host municipalities should account for the possibility of future statutory amendments that could affect surplus distribution, prevailing wage application, or other operational parameters.
• Timeline uncertainty. For projects dependent on new TIF district creation, the political and procedural requirements — including Joint Review Board consultation, public hearings, and potential challenges — require realistic scheduling assumptions.
• Documentation standards. The Richland School District case reinforces the importance of precise legal work during TIF district formation. Developers benefiting from TIF designations should confirm that the district was properly established under current statutory requirements.

Monitoring Future TIF Legislation

The General Assembly continues to consider TIF-related legislation in most sessions.

Developers with active or planned projects in TIF districts should track:

• Proposed amendments to the TIF Act that could affect district duration, eligible costs, or administrative requirements
• Extension bills for specific TIF districts that may be relevant to a project’s host municipality
• Court decisions interpreting the TIF Act, particularly those addressing contiguity, duration, or eligible redevelopment costs
• Changes to the related Enterprise Zone and Business District programs, which share certain administrative features with TIF

Positioning Your Project in a Shifting TIF Landscape

TIF districts remain one of the most significant economic development tools available to Illinois developers, but the regulatory framework continues to evolve through both legislative and judicial action.

We can help assess how recent changes affect your project and coordinate with host municipalities on the regulatory and financial structure. Contact us today to discuss your project.

This content is for informational purposes only and does not constitute legal advice. The information provided does not create, and receipt of it does not constitute, an attorney-client relationship. You should not act upon this information without seeking advice from an attorney licensed in your own state or country.