What Are Impact Fees and How Do They Affect My Project Budget?

March 9, 2026 | Kristi Kandel

ASK:

What are impact fees, and how do I plan for them without blowing up my budget?

ANSWER:

Impact fees are one of the most common surprises for first time developers. They are fees charged by cities or counties to help pay for the public infrastructure needed to support new development. This can include roads, water and sewer systems, parks, schools, or public safety facilities.

The idea is simple. New development creates demand, and impact fees are how local governments recover part of that cost.

The challenge is that impact fees are often significant and easy to overlook early in underwriting.

How Impact Fees Are Calculated

Impact fees are usually based on:

• The type of use, such as residential, retail, or industrial
• The size of the project, often per unit or per square foot
• The location of the property within the jurisdiction

For residential projects, fees are commonly charged per dwelling unit. For commercial projects, they may be tied to square footage or expected traffic generation.

In some markets, impact fees can be a few thousand dollars per unit. In others, they can reach tens of thousands per unit. That difference can determine whether a deal pencils or not.

When Impact Fees Are Due

Impact fees are typically paid at one of two points:

• When building permits are issued
• When a certificate of occupancy is requested

This timing matters. Even if fees are due later, they still need to be included in your total project budget and cash flow planning.

How to Plan for Impact Fees

The best approach is to ask early during your initial due diligence. Planning, public works, or building departments can usually provide a fee estimate once they understand your project type and size.

Some jurisdictions offer fee reductions or credits for redevelopment projects, affordable housing, or projects that reuse existing infrastructure. These programs vary widely, so never assume they apply without confirmation.

Impact fees are predictable once identified. The mistake is discovering them too late.

KEY TAKEAWAYS:

• Impact fees can materially affect project feasibility.
• Fee amounts vary widely by location and project type.
• Always confirm fees early and include them in your budget.

PEOPLE ALSO ASK:

Can impact fees be negotiated or reduced?

Sometimes. Redevelopment projects or projects with public benefits may qualify for reductions or credits.

Do impact fees apply to renovations?

It depends. If you are increasing density or changing use, fees may apply. Always confirm with the city.

Are impact fees tax deductible?

They are part of your project cost basis and factor into overall project accounting.

Unlock more tools, templates & case studies—get free access to the Developer Vault.

SHARE THIS