Fiscal Sponsorship Models: What’s the Difference Between Model A and Model C?

If you’re launching a charitable initiative and exploring fiscal sponsorship, you’ve likely encountered references to “Model A” and “Model C.” These are the two most common structures used in the U.S. nonprofit sector. While the terminology can sound technical, understanding the difference between these models is essential to choosing the right path for your project.

At PPF, we regularly work with individuals and organizations seeking to make an impact both with, and without, forming a separate nonprofit. Below, we break down the core distinctions between Model A and Model C fiscal sponsorship, including how they work, their respective benefits, and who they’re best suited for.

What Is Fiscal Sponsorship?

Fiscal sponsorship is a legal arrangement in which a 501(c)(3) nonprofit (the sponsor) supports a mission-aligned project that (usually) does not have its own tax-exempt status. This allows the project to:

• Receive tax-deductible donations
• Apply for grants restricted to 501(c)(3) organizations
• Operate legally as a public benefit initiative

It’s a legitimate, IRS-recognized alternative to forming an independent nonprofit and particularly useful for early-stage, time-limited, or pilot projects. You can read more about fiscal sponsorship in our blog titled “What is Fiscal Sponsorship, and How Does It Work?”

Now let’s look at the two most common types of fiscal sponsorship.

Model A: Comprehensive Fiscal Sponsorship

How It Works:

In Model A, the project becomes a fully integrated program of the sponsor. This means:

• The sponsor assumes legal and fiduciary responsibility for the project.
• The sponsor owns the project’s assets, including donations, equipment, and intellectual property.
• The individuals working on the project operate as staff, contractors, or volunteers under the sponsor’s umbrella.

This is the most comprehensive form of fiscal sponsorship, offering full administrative and operational compliance support.

Best For:

• Founders who want to focus on mission and programming, not compliance
• Projects intended to operate long-term
• Individuals who don’t plan to form a separate nonprofit, or are unsure

Sponsor’s Responsibilities:

• Accepts and manages donations
• Issues tax receipts to donors
• Manages accounting, compliance, filings, and assists with reporting
• Oversees grant disbursement, staffing, and budgeting

In simple terms: the sponsor adopts the project and manages it as an internal program, while the advisor runs operations. 

Model C: Pre-Approved Grant Relationship

How It Works

In Model C, the project is a separate legal entity (traditionally a nonprofit corporation) that receives funding through a grant relationship with the sponsor. The sponsor receives charitable donations and re-grants the funds to the project for IRS-approved charitable activities. This means:

• The sponsor does not operate the project.
• The sponsor retains discretion and control over how funds are granted, in compliance with IRS regulations.
• The project is expected to manage its own operations and compliance.

Best For:

• Projects that are already formed as legal entities
• Teams with the capacity to manage finances, compliance, and staffing independently
• Initiatives planning to spin off into their own nonprofit in the near future

Sponsor’s Responsibilities:

• Accepts charitable donations and foundation grants
• Regrants funds to the project in accordance with approved charitable purposes
• Monitors use of funds for compliance
• May provide limited administrative services (varies by sponsor)

In simple terms: The sponsor acts as a grantmaker to an external charitable project.

Key Differences at a Glance

Choosing the Right Model

Here are a few questions to consider:

• Do you want compliance oversight without fiduciary responsibility? → Model A
• Do you plan to receive restricted grants or donations? → Model A
• Do you want to retain independence and already have a structure in place? → Model C
• Are you ready to manage compliance and operations yourself? → Model C
• Do you want your sponsor to handle the administrative work? → Model A
  
  

Both models are legitimate and useful, but they serve different needs. What matters most is aligning the structure with your goals, resources, and operational capacity.

Final Thoughts

Fiscal sponsorship is more than a legal arrangement; it’s a strategic partnership. Whether you choose Model A or Model C, it’s important to understand the expectations, responsibilities, and level of support involved.

Before entering into a fiscal sponsorship agreement, ask questions, read the fine print, and choose a sponsor whose values and approach align with your mission. The right fit can empower your project to launch with clarity, stability, and the confidence to make a lasting impact.