RFQ vs RFP vs RFI: The Differences and When to Use Each
Jul 15, 2026
Jul 15, 2026
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An RFI asks who can do this, an RFQ asks what it costs, and an RFP asks how you would solve it. The three sit at different points on one line: the RFI is for when you are still learning the market, the RFQ is for when your specification is locked and you only need prices, and the RFP is for when you know the problem but want vendors to propose the solution. Most buying events use one or two of them, not all three.
The part almost every explainer skips is what happens legally. A quote is not an offer, and a supplier's price does not create a contract. The purchase order does. That distinction is the reason this whole sequence exists, and it is where most disputes start.
| RFI | RFQ | RFP | |
|---|---|---|---|
| The question it asks | Who is out there and what can you do? | What is your price for exactly this? | How would you solve this, and at what cost? |
| Use it when | You do not yet know the market or the options | The specification is fully defined | You know the problem, not the solution |
| What you get back | Capabilities, company profiles, indicative ranges | Unit prices, lead times, validity period | A technical approach plus commercial terms |
| How the winner is chosen | Nobody wins, it is research | Mostly price and basic qualification | Weighted criteria, price is one factor |
| Is the response binding? | No | No. A quotation is not an offer | A federal proposal is an offer |
| Typical owner | Sourcing or category buyer | Procurement, minimal legal input | Cross-functional: procurement, technical, legal, finance |
A request for information is market research in document form. You send it when you do not yet know who supplies a category, what modern solutions look like, or roughly what a thing costs. GSA's guidance for federal buyers puts it plainly: an RFI is used when an agency is gathering information, and a supplier responding to one is not submitting a bid or a proposal.
Federal rules go further and say so explicitly. FAR 15.201(e) states that responses to an RFI "are not offers and cannot be accepted by the Government to form a binding contract." Commercially the same logic applies: nothing you say in an RFI response can be held to you as a price.
Skip the RFI when you already know the market. Running one out of habit adds weeks and irritates suppliers who correctly read it as an event that leads nowhere.
A request for quotation asks pre-qualified suppliers to price a requirement you have already defined down to the part number. It works only when the specification is genuinely locked, because the entire value of an RFQ is that the responses are comparable line for line.
A usable RFQ contains the exact specification or part numbers, quantities, the delivery location and required date, shipping terms, the payment terms you expect, a quote validity period, and lead time. If you are buying anything tooled or custom, ask for non-recurring engineering costs separately so they do not disappear into the unit price.
When several quotes come back as PDFs and none of them use the same layout, the comparison is the work. Getting them into one grid, unit price beside unit price, is the only way to see who is actually cheapest once freight and minimum order quantities are in. Whatever tool you use to turn those PDFs into spreadsheet rows, do not eyeball it: the cheapest headline price frequently loses on total landed cost.
A request for proposal is for when you can describe the problem but not the answer. You are buying judgment as much as goods, so vendors propose an approach and you score it against criteria you publish in advance.
FAR 15.203(a) sets out what a federal RFP has to contain, and it is a good checklist commercially too: the requirement, the anticipated terms and conditions, what the proposal must include, and the factors and significant subfactors used to evaluate proposals along with their relative importance. That last clause matters. A weighted scoring model published before responses open is what makes an award defensible when the losing vendor calls to argue.
The most common and expensive mistake in sourcing is running an RFP for something that needed an RFQ. You pay for creativity you did not need, you add a month, and you end up comparing five proposals that solve five slightly different problems.
No. A quotation is not an offer, so a buyer cannot accept it and thereby form a contract. FAR 13.004(a) says exactly that: "A quotation is not an offer and, consequently, cannot be accepted by the Government to form a binding contract." What happens instead is the reverse of what most people assume. The buyer's order is the offer, and the contract forms when the supplier accepts it. FAR 13.004(b) sets that out, and FAR 13.004(c) confirms the buyer can withdraw, amend, or cancel that offer any time before the supplier accepts.
US commercial law reaches the same place by a different route. A price quote is generally an invitation to deal, not an offer. The purchase order is the offer, and the supplier's acknowledgment is the acceptance under UCC section 2-206. If the acknowledgment comes back with different terms, you are in the battle of the forms under UCC section 2-207, which is a genuinely bad place to discover your terms did not survive.
The one thing that does bind a supplier's price is a firm offer. Under UCC section 2-205, a merchant's signed written assurance that an offer will stay open is not revocable for lack of consideration during the stated time, and where no time is stated, for a reasonable time, but in no event longer than three months. That three-month ceiling is the real legal machinery behind the familiar "quote valid for 30 days" line at the bottom of a quotation.
Either, and the honest answer depends on whether your specification is defined. The textbook order is RFI, then RFP, then RFQ, but in practice an RFQ often follows an RFP to firm up commercials once the approach is chosen, and a buyer with a locked specification goes straight to RFQ and never issues the other two. Treat the three as tools, not a mandatory staircase.
An RFQ is a question and a purchase order is a commitment. The RFQ asks a supplier what they would charge; the PO tells them what you are buying, at what price, delivered where and when, on which terms. The RFQ creates no obligation on either side. The PO is the offer that, once the supplier acknowledges it, becomes the contract you can enforce, accrue against, and match an invoice to.
That is why the PO is the document worth being careful about. It carries the negotiated price, the quantities, the delivery date, and the terms, and it is the reference every later step points back to: the goods receipt, the supplier's invoice, and the three-way match that decides whether the invoice gets paid. The full sequence is laid out in the purchase order process, and what the supplier sends back to accept it is covered in purchase order acknowledgment.
Sealed bidding, governed by FAR Part 14, uses an Invitation for Bids. It is worth knowing because it behaves unlike the other three. Bids are opened publicly, they are evaluated without discussions, and the award goes to the lowest responsive, responsible bidder. There is no negotiation and no trade-off between price and approach. Responses to an IFB are called bids, responses to an RFP are proposals, and responses to an RFQ are quotations, and FAR 2.101 defines an offer as a response that, if accepted, would bind the offeror to perform. Bids and proposals qualify. Quotations do not.
If you sell to the government, two numbers changed recently and a surprising number of published guides still quote the old ones. The micro-purchase threshold is now $15,000, up from $10,000, and the simplified acquisition threshold is now $350,000, up from $250,000, following the statutory five-year inflation adjustment. Federal RFQs sit under simplified acquisition procedures in FAR Part 13, which is precisely why the quote-is-not-an-offer rule lives at FAR 13.004.
On timing, FAR 5.203 sets real clocks: a notice generally publishes at least 15 days before the solicitation is issued, and response time is generally at least 30 days for bids or proposals above the simplified acquisition threshold. Commercial products and services get shortened periods and can use a combined synopsis and solicitation. Commercially there are no reliable benchmark timelines, whatever you may read. Anyone quoting an average RFP duration is guessing.
In construction the same three letters mean different things and the confusion is real. RFQ commonly means Request for Qualifications, not quotation, and it asks a firm to prove its track record rather than name a price. An RFI on a jobsite is a clarification request raised against the drawings or specifications during the build, usually with a contractual response deadline. If you are writing to a construction audience, say which RFQ you mean in the first sentence.
The sourcing event ends and the operational work starts. You issue a purchase order, the supplier acknowledges it, goods arrive, an invoice follows, and somebody checks that all three agree. Every one of those steps depends on the PO data being accurate and available, which is a problem when the PO you receive as a supplier, or the confirmation you get back as a buyer, arrives as a PDF attached to an email.
That is the step worth automating. Upload the purchase order and our AI purchase order software reads the PO number, supplier, ship-to, dates, terms, and every line item with its quantity and unit price, then exports it to Excel, CSV, JSON, or an API in about ten seconds. Teams processing a stack of them at once use bulk purchase order upload, and developers can pull the same fields through the purchase order API. It captures the data on the orders you receive. It does not create POs, route approvals, or run the match for you.
An RFQ asks for a price against a specification you have already defined, and it is judged mostly on price. An RFP asks vendors to propose a solution to a problem you have described, and it is judged on weighted criteria in which price is only one factor. Use an RFQ when you know exactly what you want, an RFP when you want the vendor's approach.
Either. If your specification is locked, the RFQ can be the only document you issue. If you ran an RFP to choose an approach, an RFQ often follows it to firm up commercial terms with the shortlisted vendor. There is no rule that forces one order, despite the common claim that the sequence is always RFI, then RFP, then RFQ.
No. A bid is the response to an Invitation for Bids under sealed bidding, and it is an offer the buyer can accept. A quotation responding to an RFQ is not an offer, so it cannot be accepted into a contract. The distinction is set out in FAR 2.101 and FAR 13.004, and it is the reason the buyer's purchase order, not the supplier's quote, is the document that forms the deal.
The specification or part numbers, quantities, delivery location and required date, shipping and payment terms, the quote validity period, and the lead time. Ask for freight, tooling, and any minimum order quantity separately so that comparing quotes means comparing landed cost rather than headline unit price.
For whatever period the quote states, and that period has a legal ceiling. Under UCC section 2-205, a merchant's signed written assurance to hold an offer open is irrevocable for the time stated, or a reasonable time if none is stated, but never longer than three months. After that the supplier is free to reprice.
Yes, and it is the most important document in the chain. The quote commits nobody. The purchase order is your offer to buy at the quoted price on stated terms, and the supplier's acknowledgment turns it into a contract. Without a PO you have a price and no agreement, and nothing for the invoice to be matched against.
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