Fiscal sponsorship works like this: a charitable project runs under the tax-exempt umbrella of an existing 501(c)(3) organization instead of getting its own IRS determination. Donors write checks to the sponsor and get a tax-deductible receipt from the sponsor. The sponsor holds and disburses the money, handles compliance, and takes a fee, usually 5% to 10% of what comes in. The project focuses on the work. A written agreement between the two parties defines who controls the funds, who employs the staff, and what happens when the arrangement ends.
The setup can be operational in weeks. Standing up an independent nonprofit takes months and real money.
Why Projects Use a Sponsor Instead of Getting Their Own 501(c)(3)
The problem fiscal sponsorship solves is access to funding. Most foundations and government grant programs require applicants to hold 501(c)(3) status. Individual donors want their contributions to be tax-deductible, which under federal law requires the receiving organization to be a qualifying charity.1Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts A brand-new project can offer neither.
Getting there on your own is slow and not cheap. Applying for 501(c)(3) status through IRS Form 1023 costs $600 in filing fees alone, or $275 for the shorter Form 1023-EZ available to smaller organizations.2Internal Revenue Service. Frequently Asked Questions About Form 1023 Before filing you have to incorporate as a nonprofit in your state, draft bylaws, assemble a board, and set up accounting. Approval commonly takes three to six months.
Under a fiscal sponsor, donations are immediately deductible because the sponsor is already a qualifying charity. The sponsor handles payroll, tax filings, and compliance. The tradeoff is less autonomy — the sponsor has real authority over how money gets spent — and the ongoing fee.
For a one-time community event, a short-term research initiative, or an arts production with a defined lifespan, sponsorship often makes more sense than building a nonprofit that will be dissolved a year or two later. It also suits projects testing a concept before committing to permanent organizational status.
The Two Main Models: A and C
Fiscal sponsorship isn’t a single structure. Practitioners recognize at least six distinct models, originally categorized by nonprofit attorney Gregory Colvin. The two most common, and the most structurally different, are Model A and Model C. Which one you use determines who employs the staff, who owns the assets, and where legal liability sits.
Model A: The Project Becomes Part of the Sponsor
Under Model A, sometimes called the Direct Project or Comprehensive model, the sponsored project is not a separate legal entity. It becomes an internal program of the sponsor, the way a hospital might run a specific clinic as a department. The sponsor pays all bills directly and absorbs all liability.
The consequences are sweeping. All of the project’s assets belong to the sponsor. Everyone working on the project is legally an employee of the sponsor, covered by the sponsor’s payroll, benefits, and workers’ compensation. The sponsor withholds income and employment taxes, issues W-2s, and manages HR obligations. If someone sues over the project’s activities, the sponsor faces the lawsuit.
The upside is simplicity for the project: no separate legal entity, no separate insurance, no separate accounting infrastructure. The downside is that the sponsor has final say on budgets, hiring, and programmatic direction. If the relationship ends, assets stay with the sponsor unless the agreement explicitly provides otherwise.
Model C: The Project Stays a Separate Entity
Model C, the Pre-Approved Grant Relationship, treats the project as a separate legal entity, usually a newly formed nonprofit corporation or unincorporated association. The sponsor doesn’t absorb the project. It accepts donations on the project’s behalf and then re-grants those funds to the project after deducting its fee.
Functionally it looks like a grantor-grantee relationship. The project has its own governance, its own staff (employees of the project, not the sponsor), and considerably more operational independence. The sponsor still must verify that grant money is used for legitimate charitable purposes. This obligation is modeled on expenditure responsibility, the framework the IRS uses for private foundation grants to non-exempt organizations.3Office of the Law Revision Counsel. 26 USC 4945 – Taxes on Taxable Expenditures
Under expenditure responsibility, the sponsor conducts a pre-grant inquiry, requires a signed agreement governing how funds will be used, and collects detailed annual reports verifying that the money went where it was supposed to.4eCFR. 26 CFR 53.4945-5 – Grants to Organizations Reports continue annually until grant funds are fully spent or the grant is terminated.
The tradeoff is more administrative burden on the project’s side. Because the project is a separate entity, it handles its own employment taxes, maintains its own insurance, and, if it’s an incorporated nonprofit meeting the filing thresholds, files its own IRS Form 990. The sponsor’s oversight focuses on charitable use of grant funds; the project shoulders day-to-day compliance.
Which Model Fits
A grassroots community group with no legal structure and no desire to manage payroll fits naturally under Model A. An established organization that already has staff and governance but hasn’t yet obtained its 501(c)(3) determination may prefer Model C’s lighter touch. Projects that plan to eventually spin off into independent nonprofits sometimes start with Model A for convenience and shift to Model C, or directly to independent status, as they grow.
How Donations Actually Flow
When a donor gives money to a fiscally sponsored project, the check is written to the sponsor, not to the project. This is what makes the donation tax-deductible. Under IRC Section 170, charitable contribution deductions are only available for gifts made to qualifying organizations, and the sponsor is that qualifying organization.1Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
The sponsor issues the tax receipt. For any single contribution of $250 or more, the IRS requires a written acknowledgment that includes the organization’s name, the amount of cash contributed, and a statement about whether goods or services were provided in return.5Internal Revenue Service. Charitable Contributions Written Acknowledgments The donor needs this receipt to claim the deduction. Smaller gifts still need the donor’s own records, such as bank statements or cancelled checks, but the formal acknowledgment requirement kicks in at $250.
One point trips up project leaders. Donated funds are not a pot of money the project controls at will. Under both models, the sponsor has legal authority, and a legal obligation, to ensure funds serve the stated charitable purpose. A donor giving to “Project X through Sponsor Organization” is making a gift to the sponsor, restricted for use by that project. The sponsor can and should refuse to approve expenditures that don’t align with the project’s charitable mission. Treating the sponsor as a passive ATM misunderstands the arrangement and creates real risk for the sponsor’s tax-exempt status.
Behind the scenes, the sponsor tracks each project’s money separately in its own accounting system, even though the funds legally belong to the sponsor under Model A or pass through it under Model C. Donations earmarked for a specific project are classified as contributions with donor restrictions and tracked separately from the sponsor’s general operating funds.
What the Sponsorship Agreement Has to Cover
Every fiscal sponsorship relationship rests on a written agreement. Skipping this document, or using a vague template without customizing it, is where most problems start. The sponsor typically conducts due diligence before signing, reviewing the proposed budget, leadership, and fundraising plans to confirm the project’s mission aligns with the sponsor’s exempt purpose.
The agreement should address at minimum:
- Scope and duration. What activities the project will carry out, how long the sponsorship lasts, and under what conditions it renews.
- Financial control. How funds are received, held, and disbursed. Under Model A, the sponsor holds legal title to all project assets. Under Model C, the agreement specifies the grant-making process and reporting schedule.
- Administrative fee. Most sponsors charge 5% to 10% of funds received, deducted before money is available for project spending. Some charge a flat monthly amount instead, and many add a one-time setup fee to cover due diligence.
- Intellectual property. The clause most projects overlook. Under Model A, work created by project employees may legally belong to the sponsor as “work made for hire” unless the agreement says otherwise. If the project creates research, curriculum, software, or creative content, the agreement needs to spell out who owns it during the sponsorship and after it ends.
- Termination. How either party can end the relationship, how much notice is required, and what happens to remaining funds, donor lists, and intellectual property. Under Model A, assets belong to the sponsor by default. The agreement is the only mechanism for ensuring they can follow the project to a new home.
A good agreement also addresses dispute resolution and indemnification. Both parties should understand what happens if they disagree about an expenditure, a programmatic decision, or the interpretation of the agreement itself. A few hundred dollars on legal review prevents far more expensive problems later.
Who Employs the Staff and Files the Taxes
Worker classification tracks the model. Under Model A, project staff are employees of the sponsor. The sponsor issues W-2s, withholds income and payroll taxes, and provides any applicable benefits. Under Model C, the project employs its own workers and handles its own payroll obligations.
Getting this wrong is expensive. If a Model A sponsor treats project workers as independent contractors to avoid payroll costs and the IRS later reclassifies them as employees, the sponsor owes back taxes, penalties, and interest. The IRS evaluates worker status based on behavioral control, financial control, and the nature of the relationship, not the label the parties put on it.
Annual tax reporting also splits by model. Under Model A, the project’s entire financial activity, revenue, expenses, and assets, gets reported on the sponsor’s IRS Form 990. The project doesn’t file a separate return.6Internal Revenue Service. Instructions for Form 990 Return of Organization Exempt From Income Tax Under Model C, the sponsor reports grants made to the project on its own Form 990, typically on Schedule I. Because the project is a separate legal entity, an incorporated nonprofit meeting the filing thresholds must also file its own Form 990. Project leaders under Model C shouldn’t assume the sponsor is handling everything; their own filing obligations exist independently.
Liability
Liability exposure looks different depending on the model. Under Model A, the sponsor is directly responsible for everything the project does. If a project employee injures someone, or an event causes property damage, or an employment dispute arises, the sponsor faces the claim. The sponsor’s insurance needs to cover all of it: general liability, directors and officers coverage, employment practices liability, workers’ compensation for project employees, and volunteer accident coverage if applicable.
Under Model C, the sponsor’s direct exposure is narrower because the project is a separate entity carrying its own insurance and bearing its own operational liability. The sponsor’s board can still face claims related to its decision to sponsor a particular project or its oversight of grant funds.
The practical takeaway for project leaders: if you’re under Model A, confirm that the sponsor’s insurance actually covers your specific project activities before you start operating, and ask to see the relevant policy declarations. If you’re under Model C, you need your own policies, and your sponsorship agreement should specify coverage minimums.
What Sponsored Projects Can’t Do
Sponsored projects are bound by the same restrictions on political activity that apply to any 501(c)(3). The absolute rule: no intervention in political campaigns for or against candidates. No endorsements, no campaign contributions, no communications that support or oppose a specific candidate.
Lobbying, meaning efforts to influence legislation, is permitted but limited. Under the default substantial part test, the IRS evaluates whether lobbying is a substantial part of the organization’s overall activities, looking at both time and money.7Internal Revenue Service. Measuring Lobbying Substantial Part Test Organizations wanting clearer boundaries can make the Section 501(h) election, which replaces the vague standard with specific dollar thresholds, starting at 20% of the first $500,000 of exempt-purpose expenditures and capping at $1 million regardless of organizational size. Grassroots lobbying is further limited to one-quarter of the total lobbying allowance.
Under Model A this gets tricky: the project’s lobbying counts toward the sponsor’s aggregate lobbying limits. A sponsor managing multiple projects has to monitor lobbying across all of them, because one project going overboard can jeopardize the whole organization’s exempt status. Organizations that lose their exemption for excessive lobbying face a 5% excise tax on lobbying expenditures for that year, and managers who approved the spending knowing the likely consequence can be held personally liable for the same penalty.7Internal Revenue Service. Measuring Lobbying Substantial Part Test
Ending the Relationship or Moving to Independence
Many projects use fiscal sponsorship as a launching pad, aiming to eventually get their own 501(c)(3) status. Planning for that transition should start when the original agreement is drafted, not when you’ve already outgrown the arrangement.
The mechanics depend on the model. Under Model A, all assets legally belong to the sponsor. Transferring them to a new independent nonprofit requires the sponsor to make a grant to the successor organization, and the sponsor has to make sure that grant is consistent with its charitable purposes. The agreement should detail exactly how the transfer works: what assets move (including intellectual property, donor lists, and physical equipment), what timeline applies, and whether the sponsor retains any residual obligations. Without those provisions in writing, a project that spent years building a donor base and creating content may find it has no legal claim to either.
Under Model C, the transition is simpler because the project already exists as a separate entity. Once it receives its own IRS determination letter confirming 501(c)(3) status, it can begin accepting donations directly. The sponsor stops making grants and the relationship winds down under the termination provisions.
Expect the transition to take several months either way. Applying for your own tax-exempt status through Form 1023 costs $600 and takes roughly three to six months to process.2Internal Revenue Service. Frequently Asked Questions About Form 1023 You’ll also need independent payroll and accounting systems, your own insurance, and registration for charitable solicitation in any state where you plan to fundraise. Build that infrastructure in parallel with your final months under sponsorship so you don’t end up with a gap in your ability to accept donations.