Quick Answer
Cost share (matching) is the non-federal contribution required by some grant programs — typically 20-50% of total project costs. It can be cash (direct expenditures from non-federal sources) or in-kind (donated volunteer time, supplies, space, or equipment valued at fair market rates). Once committed in your application, cost share becomes a binding obligation auditable by federal auditors. The governing regulation is 2 CFR 200.306. Cost share is only required when the NOFO explicitly mandates it — and when not required, you should generally avoid volunteering it.
Contents
What Is Cost Share and When Is It Required?
Cost sharing — also called matching or match — refers to the portion of total allowable project costs that are not funded by the federal award and must instead be contributed by the recipient organization or by third parties. It is the federal government's mechanism for ensuring that grantees have "skin in the game" — a direct financial stake in the project's success — and for leveraging federal dollars with non-federal resources to accomplish more than the federal appropriation alone could fund.
Not all federal grants require cost sharing. The Notice of Funding Opportunity (NOFO) for each program will explicitly state whether cost share is required, and if so, at what percentage of total project costs. When a NOFO requires match, it will specify the minimum percentage, whether cash match is required or in-kind is acceptable, and any restrictions on match sources. Some programs — particularly in the NIH, NSF, and EPA research portfolios — explicitly prohibit voluntary cost share commitments to prevent grantees from using inflated match pledges as a competitive advantage over peers who do not have excess matching resources.
The governing federal regulation for cost sharing is 2 CFR 200.306 (Uniform Administrative Requirements, Cost Principles, and Audit Requirements for Federal Awards), which defines allowable cost share, documentation requirements, and the consequences of failing to meet committed match. Understanding 2 CFR 200.306 — and the broader Uniform Guidance framework — is essential for any organization managing federal grants with matching requirements. Grant recipients should also review their specific award terms, which may impose additional requirements beyond the Uniform Guidance baseline.
Programs that commonly require matching include USDA Rural Development programs (often 25-50% match), EPA Environmental Justice programs (25% match), Community Development Block Grant (CDBG) programs (variable), and many workforce development programs. Research programs at NIH, NSF, and DOE typically do not require cost share for most mechanisms — with exceptions for specific program types such as training grants, cooperative agreements with industry partners, and center grants.
Cash Match vs. In-Kind Match
Cost share contributions fall into two broad categories: cash and in-kind. Understanding the distinction is important both for budgeting and for compliance documentation.
Cash match consists of actual money expended from non-federal sources directly for allowable project costs. This includes organizational funds drawn from operating or reserve accounts, foundation grant funds specifically designated for the project, state appropriations allocated to the project, local government contributions, and revenue generated by the project itself (if allowable). Cash match is the cleanest form of cost share — it is straightforward to document (invoices, receipts, bank records, financial ledger entries) and straightforward to audit. For programs that require cash match specifically, in-kind contributions are not acceptable substitutes.
In-kind match consists of non-cash contributions — goods, services, time, space, or equipment provided to the project at no charge by the recipient organization or by third parties, valued at fair market rates. Common in-kind match contributions include: volunteer labor (valued at the fair market rate for the services performed, not necessarily minimum wage); donated materials and supplies (valued at fair market replacement cost at time of donation); use of donated facilities or equipment (valued at fair market rental rate); and services provided by another organization at below-market rates (the difference between fair market rate and charged rate constitutes in-kind match).
In-kind match carries higher documentation burdens and more compliance risk than cash match. The fair market valuation of in-kind contributions must be defensible — if your organization claims a specialist's volunteer time is worth $150/hour, you must be able to demonstrate that rate reflects actual market compensation for that role. Equipment or facility valuations require documented fair market assessments. Third-party in-kind contributions require written agreements from the contributing organization confirming the donation and its value. Federal auditors scrutinize in-kind match valuations carefully, particularly for large or unusual contributions.
How to Calculate Cost Share Correctly
One of the most common errors in federal grant budgeting is miscalculating the required cost share percentage — specifically, confusing match as a percentage of total project costs with match as a percentage of the federal award amount. These produce different numbers, and using the wrong formula can result in committing too little match (a compliance violation) or too much (unnecessarily constraining your budget).
Scenario A — Match as a percentage of total project costs
If a NOFO requires 25% cost share of total project costs and your federal award is $750,000, the calculation is: Federal Award = 75% of total; therefore Total Project = $750,000 / 0.75 = $1,000,000; and Required Match = $1,000,000 × 0.25 = $250,000. Your match is $250,000 on a $1,000,000 total project.
Scenario B — Match as a percentage of the federal award
If a NOFO requires a 1:1 match (dollar for dollar), this typically means your non-federal contribution must equal the federal award amount. With a $750,000 federal award, you need $750,000 in match, for a $1,500,000 total project — not $1,000,000.
Read the NOFO cost share requirement carefully to determine which formula applies. The NOFO will typically use language such as "applicants must provide at least 25 percent of total project costs from non-federal sources" (Scenario A) or "matching funds must equal the federal share" (Scenario B). When in doubt, contact the program officer and ask for clarification — this is a reasonable pre-application question that program officers expect and welcome.
Budget your match with a reasonable cushion above the minimum required. Projects encounter unexpected cost variances, and if actual project costs come in lower than budgeted, the minimum match threshold must still be met. Building a 5-10% buffer above the minimum match prevents compliance shortfalls from normal project cost variability.
Key Data
- Governing regulation: 2 CFR 200.306 (Uniform Guidance on Cost Sharing)
- Volunteer time valuation floor: $7.25/hour (federal minimum wage) for unskilled labor; fair market rate for skilled roles
- Uncommitted cost share: not tracked or audited — only committed cost share creates a binding obligation
- USDA Rural Development programs: often require 25-50% non-federal match
- EPA Environmental Justice programs: typically require 25% match
- Single Audit threshold: $750,000 in federal awards triggers Single Audit, which includes cost share examination
- Third-party in-kind match: requires written agreement from contributing organization at time of application
Allowable and Unallowable Match Sources
Not every dollar an organization spends or every resource it contributes qualifies as allowable cost share. 2 CFR 200.306 specifies that cost share contributions must meet six criteria to be allowable: they must be verifiable in the recipient's records; not included as contributions for any other federally-assisted project; necessary and reasonable for accomplishment of the project objectives; allowable under the applicable cost principles (2 CFR 200 Subpart E); not paid by the federal government under another award (unless specifically authorized); and provided for in the approved budget when required by the federal awarding agency.
The most significant and frequently misunderstood restriction on match sources is the prohibition on using other federal funds as match. With limited statutory exceptions, federal funds from one program cannot be used to meet the matching requirement of another federal program. This "non-supplantation" principle prevents double-counting of federal investment. For example, if your organization receives a Medicaid reimbursement for services provided as part of a federally-funded project, those Medicaid payments generally cannot also be counted as match for the federal grant.
Exceptions to the prohibition on using federal funds as match do exist and require careful statutory analysis. Some programs are explicitly authorized by Congress to serve as matching funds for specific other programs — for example, certain HUD funds can match certain DOT programs, and vice versa, when Congress has specifically authorized the cross-match. The program officer at the awarding agency is the appropriate resource for understanding whether a specific federal funding source is eligible to match a specific program.
Allowable non-federal match sources typically include: organizational operating funds (salaries, fringe benefits, indirect costs allocated to the project from non-federal sources); foundation and private grants specifically designated for the project; state and local government appropriations; corporate donations and partnerships; revenue generated by the project (e.g., program fees, if allowable under the program's terms); and in-kind contributions from organizational assets or third parties, valued at fair market rates. Matching contributions that are part of normal organizational operations — overhead costs, general administrative expenses not directly attributable to the project — require clear allocation documentation to qualify as match.
Documentation Requirements for Match
Cost share documentation is one of the most common audit findings in federal grant compliance. The documentation standard is that cost share contributions must be verifiable — meaning a federal auditor reviewing your records could independently confirm that the contributions occurred, at the value claimed, and were used for the purposes described. Meeting this standard requires a documentation system designed specifically for cost share tracking, not just general financial recordkeeping.
For cash match, documentation requirements include: financial ledger entries showing the expenditure and identifying it as project match; invoices, receipts, or contracts for goods and services purchased with matching funds; payroll records for staff whose salaries are counted as match; and bank statements or payment records confirming the expenditure occurred. The key documentation principle is contemporaneous recording — cost share must be documented as it occurs, not reconstructed after the fact. Post-hoc documentation reconstructions are a major red flag for auditors and can result in disallowed costs.
For volunteer time, documentation must include: timesheets or equivalent records signed by the volunteer and a supervisor showing dates worked, hours contributed, activities performed, and the project these hours were attributed to; documentation establishing the fair market rate used for valuation (job descriptions, salary surveys, comparable wage data, or professional rate schedules); and, for third-party volunteers, a written agreement from the third-party organization confirming the volunteer arrangement. Volunteer timesheets must be maintained at the same level of detail as employee timesheets — "approximate" records or after-the-fact estimates are not acceptable.
For in-kind donations of supplies and equipment, documentation must include: a written acknowledgment from the donating organization or individual identifying the item, quantity, condition, and date of donation; an independent fair market valuation of the donated item (comparable sales data, appraisal, or catalog pricing); and evidence that the item was used for the project (inventory records, receipts for related expenditures, or service records). Equipment donations valued above certain thresholds may require formal appraisals.
For donated space and facilities, documentation must include: a signed lease or use agreement (even if the space is provided free) identifying the facility, the period of use, and the project it supports; a fair market rental appraisal or comparable rental data for similar space in the same market; and records of actual usage (schedules, sign-in sheets, room reservations). Undocumented space contributions — even if genuinely provided — cannot be counted as match.
Important Note
Cost share documentation must be maintained for the same retention period as other grant records — typically three years after the final financial report is submitted to the federal awarding agency (or longer if audit findings are pending). Organizations that destroy records early can face significant consequences if a late audit or appeal triggers record requests. Build cost share documentation into your grant management system from day one, not as an afterthought at closeout.
Voluntary Committed Cost Share: The Hidden Risk
Voluntary committed cost share is cost share that an applicant commits in their application even though the program does not require it. This practice — often done with the mistaken belief that offering more match will strengthen a competitive application — creates a serious compliance risk that many grant writers and program managers do not fully appreciate.
Under 2 CFR 200.306, any cost share committed in a grant application becomes a legally binding obligation once the grant is awarded. The federal awarding agency will incorporate the committed match amount into the award conditions, and the recipient is legally obligated to achieve that match level by the end of the performance period. If you volunteer $200,000 in match for a program that required no match, and then fail to achieve that $200,000 in matching contributions, you are in the same compliance position as an organization that failed to meet required match — potentially facing disallowed costs and repayment demands.
The strategic implication is clear: do not commit cost share you are not confident you can document and achieve. If a program requires 25% match, commit exactly 25% (with a small buffer). If a program does not require match, think carefully before committing any — and if you do commit match voluntarily, have a fully documented plan for achieving it before you write it into the application. Grant writers who inflate match commitments to appear competitive are creating serious post-award compliance risks for their organizations.
Some programs have moved explicitly to prohibit voluntary committed cost share for this reason. NIH, for example, does not allow voluntary committed cost share for most research mechanisms — any match committed in an NIH application must be specifically required by the NOFO, or it should not be included. NSF has similar restrictions for most mechanisms. Organizations should read each NOFO's cost share section carefully and ask the program officer if the guidance on voluntary match is unclear.
Matching Strategies That Work
For programs with mandatory matching requirements, developing a reliable match strategy before submitting an application is as important as developing the program narrative. Organizations that treat match as an afterthought frequently struggle with compliance during implementation. The most effective matching strategies build on the organization's existing resource base rather than relying on speculative future donations or partnerships that have not been confirmed.
Medicaid and third-party billing
For health and social services organizations, Medicaid and other third-party billing revenue for services provided under the project can sometimes qualify as match, depending on the specific program's rules. This requires careful analysis by your finance and compliance team — but for eligible programs, it can represent a significant source of non-federal match without requiring additional fundraising. Verify eligibility with the program officer before building Medicaid revenue into your match plan.
State and local government appropriations
State agencies and local governments often co-invest in federal grant projects through matching appropriations, particularly for infrastructure, public health, workforce development, and housing programs. Before applying for a federal grant with match requirements, explore whether your state agency partner or local government can provide a formal matching commitment — even a letter of intent committing state funds can strengthen both the competitive application and your post-award match implementation.
Foundation grants as match
Private foundation grants can serve as match for federal grants, provided the foundation grant is not itself restricted to a use that would conflict with the federal project. If you hold a foundation grant for "general operating support," discuss with your finance team whether any portion can be allocated to the federal project as match. Restricted foundation grants — those designated for a specific purpose that does not align with the federal project — cannot be double-counted as match.
Volunteer programs
Organizations with active volunteer programs have a potentially significant source of in-kind match. A legal aid clinic with pro bono attorney volunteers, a food bank with consistent volunteer sorters, or a mentoring organization with certified volunteer mentors can value this time at fair market rates for professional services. Establishing rigorous volunteer timesheet systems before applying — not after — is essential, since post-hoc reconstruction of volunteer hours is not compliant.
Organizational staff time
Staff time dedicated to the project from non-federal funding sources qualifies as match, even if those staff members are paid from the organization's general operating budget. A portion of the executive director's time spent on the project, allocated from non-federal operating funds, can be a legitimate match contribution — provided it is documented with timesheets and salary documentation in the same way as any other personnel match.
Frequently Asked Questions
What is cost sharing in a federal grant?
Cost sharing (matching) is the non-federal portion of total project costs — contributed by the recipient or third parties in cash or in-kind. It is required only when the NOFO specifies it. Once committed in a grant application, cost share becomes a legally binding obligation governed by 2 CFR 200.306 and subject to federal audit.
Can I use other grants to meet my match requirement?
Other federal funds generally cannot be used as match — this is prohibited at 2 CFR 200.306(b)(5) to prevent double-counting of federal investment. Non-federal grants (from foundations, states, local governments, or corporations) can typically be used as match, provided they are not restricted to another specific purpose. Verify any specific source's eligibility with the program officer before including it in your match plan.
How is volunteer time valued for matching?
Volunteer time is valued at the fair market rate for the services performed — not at minimum wage, unless the volunteer is performing unskilled labor with no market equivalent. A volunteer physician is valued at physician market rates; a volunteer attorney at attorney market rates. All volunteer hours used as match must be documented with contemporaneous timesheets showing dates, hours, activities, and qualifications.
What happens if I don't meet my match commitment?
Federal auditors can require repayment of federal funds proportional to the unmet match. If you committed 25% match and only achieved 10%, the shortfall can result in disallowed costs and repayment demands. Consistent match failures can also affect an organization's ability to receive future federal awards. Build a realistic match plan before committing and track match achievement throughout the performance period, not just at closeout.
Is cost sharing always required?
No. Cost share is only required when the NOFO explicitly mandates it. Many federal programs — including most NIH and NSF research mechanisms — have no cost share requirement. Some programs actively prohibit voluntary cost share commitments. When cost share is not required, avoid volunteering it in your application unless you have a fully documented plan for achieving and recording it, since any committed cost share becomes binding upon award.
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