RFPs vs. RFIs: What’s The Difference?
An RFP asks vendors to propose and price a solution the buyer has already defined. An RFI asks vendors what the solution should be, before the buyer knows. One is a competition you can win; the other shapes the competition that follows. Here is how to tell them apart and when to respond to each.
An RFP asks vendors to propose and price a solution to a problem the buyer has already defined. An RFI asks vendors what the solution should be, before the buyer knows enough to write requirements. That single difference — whether the buyer has decided what they want — explains everything else about how the two documents look and how you should respond to them.
How Do an RFP and an RFI Compare?
| RFP | RFI | |
|---|---|---|
| Buyer's position | Knows what it wants | Still deciding what it needs |
| What it asks for | A specific, priced solution | Capabilities, approaches, market options |
| Pricing required | Yes, usually on a set schedule | Rarely; sometimes rough estimates |
| Question style | Detailed and prescriptive | Broad and open-ended |
| Evaluation criteria | Published, often with weightings | Usually none stated |
| Typical length | Long — often 50 to 100+ pages | Short — frequently under 10 |
| Effort to respond | Substantial | Modest |
| Leads to | A contract award | Often an RFP; sometimes nothing |
| Binding | Yes, once awarded | No |
What Is a Request for Proposal?
An RFP is a solicitation asking vendors to propose how they would deliver a defined project, and at what price. It sets out requirements in detail, states the criteria the buyer will score against, and gives firm dates for questions and submission. By the time an RFP is issued the buyer generally understands both the problem and the market — they are choosing between solutions, not discovering them. For a fuller treatment, see what an RFP is.
What Is a Request for Information?
An RFI is issued when the buyer knows they have a problem but not what the answer looks like. Rather than soliciting bids, it gathers intelligence: what approaches exist, roughly what they cost, which suppliers operate in this space, and what is realistic. Agencies also use RFIs to find vendors at all, particularly when procuring something for the first time. Our guide to what an RFI is covers the document itself in more depth.
How Can You Tell Which One You Are Looking At?
Not by the title. Issuers label documents inconsistently, and you will meet Request for Tender, Request for Bids, Request for Qualifications and Invitation for Bid describing overlapping things. Read what the document actually asks for instead. RFIs tend to announce themselves in the purpose statement:
"The County is seeking information from qualified firms who can provide digital content services that will enable public libraries to lend popular audiobooks and e-books via the library's website. The responses resulting from this RFI will be utilized by the County to develop an understanding of available market options."
Nothing there asks for a bid. The county wants to understand what is available. Many RFIs go further and state the point outright:
"Responses will not be treated as proposals, but will be used to create a subsequent Request for Proposal (RFP)."
That sentence is worth looking for specifically. It tells you an RFP is coming, roughly when, and that what you write now may end up shaping it.
Should You Respond to an RFI If There Is No Contract to Win?
Usually yes — and the reasoning is more concrete than "visibility." Buyers write requirements from what they learn, and much of what they learn comes from RFI responses. A vendor who explains clearly why a particular approach works often sees that reasoning reappear in the eventual RFP. Competitors then respond to requirements shaped by your thinking, having never seen the RFI.
- You learn the timeline. An RFI is early warning that budget and intent exist, months before anything is advertised.
- You can flag unrealistic assumptions. If the buyer's concept will not work at the budget implied, saying so now is far cheaper than discovering it inside a fixed-price bid later.
- The effort is small. An RFI response is typically a few pages with no pricing schedule and no binding commitment — a fraction of the cost of a full proposal.
The one thing to avoid is treating it as a sales pitch. Buyers issuing RFIs are trying to learn something; a brochure tells them nothing and reads as though you did not understand the request. Answer as the expert they were hoping to hear from.
Where Do RFQs and IFBs Fit In?
They sit further along the same spectrum, from least to most defined. An RFI asks what is possible. An RFP asks for a proposed approach and a price. An RFQ asks only for a price on something already fully specified. An IFB is a sealed-bid competition where the lowest responsive, responsible bidder generally wins. If the acronyms are still blurring together, the RFP industry glossary has the full set.
See Both in a Live Solicitation
The distinction lands fastest when you read the real thing side by side. Bid Banana pulls federal, state and local solicitations into one search, so you can open an RFI and an RFP in the same industry and compare how each is worded. New to public sector work altogether? Start with how to become a government contractor.
Not sure whether a document in front of you is worth responding to? Schedule a free consultation with The Bid Lab, call 1-844-4BIDLAB, or email respond@thebidlab.com.
Frequently asked questions
What is the difference between an RFP and an RFI?▼
An RFP asks vendors to propose and price a solution to a problem the buyer has already defined, and it leads to a contract award. An RFI asks vendors what the solution should be, before the buyer knows enough to write requirements. An RFP is a competition you can win; an RFI is information-gathering that usually shapes the RFP issued afterward.
Can you win a contract by responding to an RFI?▼
Not directly. An RFI does not result in an award, and many state explicitly that responses will not be treated as proposals. The indirect payoff is real though: buyers frequently build the subsequent RFP from what vendors told them, so a strong RFI response can shape requirements toward your capabilities and puts you on the buyer's radar before competitors know the opportunity exists.
How can I tell whether a document is an RFI or an RFP?▼
Read what it asks for. An RFI asks broad, open-ended questions about capabilities and approaches, rarely requires pricing, and often carries language stating it is not an invitation to bid. An RFP contains detailed requirements, published evaluation criteria and weightings, a pricing schedule, and a firm submission deadline. Titles are unreliable, since issuers label documents inconsistently.
Does an RFI always lead to an RFP?▼
No. An agency may conclude that no viable market solution exists, that the project is unaffordable, or that its scope needs to change entirely. Some RFIs are also issued to satisfy internal market-research requirements with no project behind them. Treat an RFI as a signal of intent rather than a guarantee, and size your response effort accordingly.
Should you include pricing in an RFI response?▼
Generally no, unless the RFI specifically asks for budgetary estimates. RFIs rarely require pricing and are not contractually binding, so firm numbers commit you to figures set before the scope is defined. If the agency asks for rough order-of-magnitude costs, give a clearly labeled range with stated assumptions rather than a quotable fixed price.