As communities across the country strive to balance growth and infrastructure demand with fiscal responsibility, impact fees have become a vital mechanism for ensuring that new development contributes its fair share toward funding public infrastructure. MSA continues to assist municipalities by preparing needs assessments and conducting the technical analyses needed to establish defensible, proportionate fees.

What are Impact Fees?

Impact fees are one‑time charges that local governments assess on new developments to help fund the public infrastructure needed to support growth — everything from roads, utilities, and schools to parks, emergency services, and affordable housing. By ensuring that new projects contribute their fair share to the systems they rely on, impact fees help communities maintain service levels, reduce strain on existing taxpayers, and guide growth in a fiscally responsible way. When thoughtfully structured and strategically invested, these fees become powerful tools that enable communities to keep pace with development, improve quality of life, and create sustainable, long-term value for residents and businesses alike.

Impact Fees in Florida: a Highly Regulated Statewide System

Florida’s Impact Fee Act (Fla. Stat. §163.31801) establishes one of the nation’s most prescriptive regulatory frameworks. Impact fee calculations must meet the dual rational nexus test, rely on recent localized data, and be accounted for in separate restricted funds. Recent legislation (e.g., CS/SB 548, HB 1301) further tightens requirements, limits fee increases, mandates structured studies, and enhances developer protections.

Florida’s stringent statewide oversight offers a model of uniformity and accountability that contrasts with the more decentralized systems in Midwestern states.

Impact Fees in Illinois: Broad Local Authority & Diverse Fee Types

Illinois Municipal Code § 65 ILCS 5/11‑12‑5, the Illinois Road Improvement Impact Fee Law (605 ILCS 5/5‑901 – 919), and Illinois Supreme Court Case Law authorizes impact fees for schools, parks, libraries, and transportation infrastructure, with local governments enjoying broad authority. Illinois courts uphold this authority so long as fees satisfy rational relationship tests and statutory requirements. Significant case law, such as the Illinois Supreme Court’s affirmation of broad transportation impact fee authority, underscores the state’s supportive environment for impact fee programs.

Illinois communities also commonly use impact fees for school sites, park dedications, roadway projects, and library expansions, reflecting the state’s long history of fee utilization. Communities in Illinois should routinely reassess impact fees to ensure that fees remain proportional to development impacts on public services and increased cost of construction, utilities, and maintenance.

Impact Fees in Iowa: Nexus, Proportionality & Local Ordinance Frameworks

Iowa does not have a single impact fee statute but provides authority through local ordinances, home‑rule powers, and state‑defined standards. Iowa incorporates impact fees and exactions guided heavily by nexus and proportionality requirements. Developers may pay assessed fees only when local governments can demonstrate a direct relationship between a development’s impact and the public facility improvements needed. Local codes further illustrate Iowa’s structured approach to calculating, restricting, and applying fees for specific service areas.

Impact Fees in Minnesota: a Nexus-driven Framework

Minnesota uses impact fees and exactions within a legal framework emphasizing nexus and proportionality, ensuring all fees directly relate to impacts created by new development. Minnesota does not have a consolidated statewide impact fee statute, but courts require a demonstrable connection between a development’s impact and the fees imposed, which requires significant effort from municipal staff. State discussions and legislative developments, including analysis of potential street impact fee legislation, reinforce these principles.

While some Minnesota legislative proposals (e.g., street impact fee authorization bills) demonstrate interest in formalizing these tools for infrastructure and development, at present each development is assessed individually, and fees can vary widely.

Impact Fees in Wisconsin: a Statutory, Needs Assessment-driven Framework

Wisconsin maintains one of the most detailed statutory frameworks for impact fees in the Midwest. Under Wis. Stat. §66.0617, municipalities may impose impact fees to fund the capital costs of public facilities needed to accommodate new development. Before adopting or adjusting any impact fee, local governments must prepare a Public Facilities Needs Assessment that inventories existing infrastructure, identifies deficiencies, projects additional facility needs resulting from growth, and estimates related capital costs. This process ensures that fees meet statutory requirements for proportionality and are tied to explicitly defined service areas and service standards.

How MSA Supports Multistate Impact Fee Needs

MSA’s methodology is fully adaptable to align with the specific needs and requirements of individual states to support both the implementation and updates of impact fees and facility needs assessments. For communities in states other than those listed above, our adaptable impact fee methodology can be customized to local conditions, and we welcome inquiries about applying this approach elsewhere. MSA is proud to offer:

• Data‑driven facility needs assessments compatible with nexus and proportionality requirements
• Infrastructure-specific capital cost modeling
• Service area and standard definition
• Transparent fee justification

MSA’s experience preparing complex, multi‑facility impact fee studies position us exceptionally well to support municipalities to navigate the impact fee system and best position municipal staff to ensure capital planning and long-term infrastructure costs are supported by new development. Reach out today to get the conversation started!