Cooperative Purchasing Explained for Municipalities

What Is Cooperative Purchasing?

Cooperative purchasing describes any arrangement in which two or more government entities use a single procurement process, or a single resulting contract, to buy goods or services. Instead of each city, county, or school district issuing its own request for proposals for the same category of purchase, one government (often called the lead or administering agency) runs the competitive solicitation, and other eligible governments are permitted to purchase from the resulting contract under the same or similar terms.

The underlying idea is straightforward: competitive bidding is meant to test the market and produce fair pricing, and once that has happened for a given contract, there is little added value in every other government repeating the same exercise for a substantially similar purchase. Cooperative purchasing lets that competitive result be shared, subject to the rules the lead agency and the purchasing government have in place.

This differs from a group purchasing arrangement in which multiple agencies jointly draft a single solicitation from the outset, though the two concepts are related and sometimes used together. In a typical piggyback scenario, the purchasing government did not participate in drafting the original solicitation; it is instead relying on work already done by the lead agency.

How Do Purchasing Cooperatives Work?

At a conceptual level, a cooperative purchasing arrangement generally follows a few recurring steps, though the specifics vary by state, by cooperative, and by the type of purchase involved.

A lead agency, which may be a state government, a regional purchasing organization, or another municipality, issues its own competitive solicitation for a category of goods or services and awards a contract to one or more vendors. The solicitation or the resulting contract typically states, up front, that other eligible governmental entities may also purchase under it, and it may define who qualifies as an eligible participant.

A municipality that wants to use the contract generally reviews the contract terms, confirms it is eligible to participate, and follows whatever administrative steps are required, which might include registering with the cooperative, executing a participation agreement, or simply issuing a purchase order that references the existing contract. From that point, the municipality transacts directly with the vendor under the previously negotiated pricing and terms, rather than negotiating new terms of its own.

Because the competitive process already occurred when the lead agency ran its solicitation, the participating municipality is not required to conduct its own separate RFP or invitation to bid for that purchase, provided its own procurement rules recognize the cooperative contract as a valid substitute for independent competition.

• A lead agency runs its own competitive solicitation and awards a contract
• The contract specifies whether other governments may participate
• A participating municipality confirms eligibility and follows any registration or participation steps
• The municipality then purchases directly from the vendor under the existing contract terms

What Are the Benefits for Small Cities?

Cooperative purchasing is particularly relevant to smaller municipalities, which often have limited procurement staff and cannot dedicate months to drafting, advertising, evaluating, and awarding a formal solicitation for every purchase that might otherwise require one.

Using an existing cooperative contract can shorten the time between identifying a need and completing a purchase, since the market research, solicitation drafting, and vendor evaluation have already been performed by the lead agency. This is especially useful for purchases that are important but not so large or unusual that they justify a fully custom solicitation.

It can also reduce the administrative burden on a small procurement office, freeing staff time for purchases that genuinely require local specifications or local vendor relationships, while routine or standardized purchases move through a cooperative contract with less staff effort per transaction.

Smaller cities may also benefit from pricing and terms that were negotiated based on the aggregate purchasing volume anticipated across many participating governments, rather than the volume any single small city could offer on its own, although actual pricing outcomes depend on the specific contract and vendor.

What Should a City Check Before Using a Cooperative Contract?

Cooperative purchasing reduces duplicate solicitation work, but it does not eliminate a municipality's responsibility to confirm that the arrangement is proper and permitted before relying on it.

First, a municipality should verify that the underlying contract was itself competitively bid or otherwise established in a manner consistent with public procurement principles. The legitimacy of piggybacking rests on the assumption that genuine competition occurred at some point; a contract that was not properly competed does not become compliant simply because it is offered as a cooperative vehicle.

Second, a municipality should confirm that its own state statutes, local charter, or procurement code actually authorizes cooperative or piggyback purchasing, and understand any conditions attached to that authorization, such as limits on contract value, required findings, or approval by a purchasing officer or governing board. Rules on this point vary significantly between states and even between municipalities within the same state.

Third, it is worth confirming that the specific contract in question permits the municipality's type of entity to participate, since some cooperative contracts are limited to certain categories of public agencies, geographic regions, or membership arrangements. A municipality should also review whether participation requires registration, a fee, or execution of a separate agreement before it can place an order.

Finally, municipalities generally still document the basis for using a cooperative contract in their own procurement files, consistent with standard recordkeeping practices, even when a separate competitive process was not required locally. This preserves an audit trail showing why the purchase was made the way it was.

• Confirm the underlying contract was competitively bid by the lead agency
• Verify state statute or local code authorizes cooperative or piggyback purchasing
• Check whether the specific contract permits your type of entity to participate
• Follow any required registration, participation agreement, or approval steps
• Keep documentation in your own procurement file supporting the purchase

Where Cooperative Purchasing Fits Into Municipal Budgeting

Cooperative purchasing is a procurement mechanism, not a budgeting mechanism, and it does not change how a municipality plans or approves spending. A purchase made through a cooperative contract still needs to be budgeted, appropriated, and approved through the municipality's normal financial processes; it simply may not require a separate solicitation before the purchasing decision is made.

Municipal software, along with many other categories of recurring purchases, is sometimes acquired through cooperative arrangements in jurisdictions where that is permitted and where a suitable cooperative contract exists. GovGrids does not currently claim participation in any specific cooperative purchasing vehicle, and municipalities evaluating any vendor, including GovGrids, should independently confirm through their own procurement office whether a cooperative purchasing option is available and appropriate for that purchase.

Frequently Asked Questions

Related Guides