Direct comparison
Procurement vs Purchasing: FAR and NIGP Terms
Procurement vs purchasing: FAR 2.101 treats procurement as acquisition, NIGP limits purchasing to buys with no long-term contract. See the side-by-side.
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How do Procurement, Purchasing compare side by side?
The table below compares Procurement, Purchasing across 10 procurement-relevant dimensions, from how the authorities use the words through source.
Side-by-side comparison
| Dimension | Procurement | Purchasing |
|---|---|---|
| How the authorities use the words | US federal rules: FAR 2.101 lists "Procurement" only as a cross-reference to "acquisition", so in federal usage the two are the same thing. | FAR 2.101 has no standalone definition of "purchase". It uses the word inside other definitions, for example "contracting" and "simplified acquisition procedures". |
| Definition on record | FAR "acquisition": "the acquiring by contract with appropriated funds of supplies or services" for the Federal Government. | NIGP "purchasing": "Obtaining, renting, or leasing needed goods or services without a long-term contract or ongoing relationship with a vendor." |
| Scope | Broad. The FAR acquisition definition runs from establishing the agency's needs through contract closeout. | Narrow. NIGP frames purchasing around obtaining the goods or services, not around a standing arrangement with the supplier. |
| Time horizon and vendor relationship | Can involve a contract and a continuing supplier relationship, which NIGP's purchasing definition expressly excludes. | One-off by definition: no long-term contract and no ongoing relationship with the vendor. |
| Where the cycle starts and ends | NIGP's purchasing/procurement cycle is the sequence of activities from identifying a need through disposal or contract closeout. | The buying act sits inside that cycle. Any step between need and closeout, including finding a supplier, falls within the same span. |
| Key documents | Whatever the contract file holds from solicitation to closeout. | NIGP: the purchase requisition (the requestor's document authorizing the start of a purchase) and the purchase order (the purchaser's written document to a supplier formalizing all terms and conditions of the proposed transaction). |
| Who does it | NIGP defines a "purchaser/procurer" as someone who buys, or issues a solicitation for, goods, services or construction on behalf of an entity. | NIGP's own entry is "Purchasing (Procurement) Department": the staff who act as the primary buyers of goods and services and oversee delegated purchasing authority. NIGP pairs the two words. |
| Are they really different? | In the FAR and NIGP texts read here, "procurement" is the wider label for the whole acquisition cycle. | The narrow "purchasing" meaning is a practitioner convention. NIGP uses the two words side by side, so check how a given policy or contract defines them. |
| When to use each term | Use "procurement" for the whole cycle: need, requisition, solicitation, contract, receipt, closeout. For a lab or clinic, that includes a standing supply contract. | Use "purchasing" for a single buy without a long-term contract, such as a one-time replenishment of a consumable. This is a reading of the NIGP definition, not a rule. |
| Source | FAR 2.101 (acquisition.gov/far/2.101), read 2026-10-30. | NIGP Dictionary of Procurement Terms (nigp.org/dictionary-of-terms), read 2026-10-30. |
Common questions
Common questions about Procurement vs Purchasing
Are procurement and purchasing the same thing?
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In US federal rules they are not separated: FAR 2.101 defines "procurement" only by pointing to "acquisition". NIGP defines purchasing more narrowly, as obtaining goods or services without a long-term contract or ongoing vendor relationship, yet it also names its staff entry "Purchasing (Procurement) Department". Treat the split as a convention and read the definition a policy actually uses.
Is sourcing part of procurement?
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NIGP describes the purchasing/procurement cycle as the sequence of activities from identifying a need through disposal or contract closeout. Finding a supplier is one of the activities inside that span, so it belongs to the cycle rather than sitting outside it.
Does a purchasing department do procurement?
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NIGP lists the "Purchasing (Procurement) Department" as the staff who act as the primary buyers of goods and services and oversee delegated purchasing authority. The same people are described under both words.
What is the difference between procurement and purchasing for medical and lab supplies?
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On the NIGP definition, a one-off buy of a consumable with no long-term contract is purchasing. A standing arrangement with a supplier goes beyond that definition and is part of the wider procurement cycle.
