RFP vs RFQ comes down to one question: do you need vendors to propose a solution, or just to quote a price? Send a request for proposal (RFP) when the answer is not settled and you will judge vendors on more than cost. Send a request for quotation (RFQ) when you know exactly what you need and price is the main test. A request for information (RFI) comes earlier, when you are still learning what the market offers.
This guide compares all three in one table, explains when to use each, and shows how US federal rules treat them. That last part explains a point many guides get wrong: whether a quote can bind you.
The three documents at a glance
| RFI | RFP | RFQ | |
|---|---|---|---|
| Full name | Request for information | Request for proposal | Request for quotation |
| Main goal | Learn about the market and vendors | Find the best solution and value | Find the best price for a known need |
| How clear is your need? | Still forming | Clear problem, open solution | Exact specs and quantities |
| What vendors send | Facts about their company and offer | A full proposal: approach, team, price, terms | A price, delivery date and terms |
| How you judge | No formal award | Weighted criteria, price is one of them | Mostly price, if specs are met |
| Typical next step | A shortlist, then an RFP or RFQ | Talks, then a contract | A purchase order |
Many procurement teams call the family "RFx," short for "request for."
Sources: Vroozi, "RFI vs. RFP vs. RFQ: Key differences"; Project-Management.com, "The key differences between RFI, RFP, and RFQ"; Shopify, "RFP vs. RFQ: What are the differences?"
What an RFI is and when to use it
An RFI asks vendors to describe what they offer. You use it when you know the problem but not the options. It helps you build a shortlist and write a better RFP later.
Use an RFI when:
- The market is new to you.
- You are not sure the problem can be solved within budget.
- You want to test whether your requirements are realistic.
Under US federal rules, an RFI is used when the government does not plan to award a contract yet but wants price, delivery or capability information for planning. Responses to an RFI are not offers and cannot be accepted to form a contract. There is no required format.
Sources: FAR 15.201(e), Exchanges with industry before receipt of proposals; Project-Management.com, "When to use RFI"
What an RFP is and when to use it
An RFP describes your need and asks vendors to propose how they would meet it. You compare proposals on several factors, such as approach, experience, risk and price.
Use an RFP when:
- The work is complex, such as software, consulting or a marketing program.
- Vendors could solve the problem in different ways.
- Quality, fit or risk matter as much as price.
The FAR says a federal RFP must, at minimum, describe the requirement, the expected contract terms, what the proposal must include, and the factors used to judge it, with their relative importance. That is a good minimum for any business RFP too. Our guide to the RFP process walks through each step.
Sources: FAR 15.203(a), Requests for proposals; Akirolabs, "How To Choose Between RFP And RFQ?"
What an RFQ is and when to use it
An RFQ asks vendors to price a clearly defined item or service. Everyone quotes on the same specs, so you can compare like with like.
Use an RFQ when:
- You can describe the item exactly: model, quantity, delivery date.
- Several vendors can supply the same thing.
- Price is the deciding factor once specs are met.
Standard goods and equipment rented at a daily or weekly rate are typical RFQ buys. Size alone does not decide the choice. One construction guide notes that even a $3 million steel package can go out as a simple RFQ if the scope is clear.
Sources: Akirolabs, "Evaluation Criteria: If Price Is the Priority"; Quollnet, "When RFQs are particularly appropriate"
Is a quote legally binding?
This is the point that trips people up. Under US federal rules, a quotation is not an offer. The government cannot accept it to form a binding contract. Instead, when the government places an order based on a quote, the order itself is the offer. A contract exists only when the supplier accepts that order.
Commercial practice is similar in spirit. Many guides note that an RFQ is not binding by itself. A contract usually forms only when the buyer accepts a quote, often by issuing a purchase order.
The practical lessons:
- For buyers: a low quote is not locked in until you have a signed order or contract.
- For sellers: your quote is a starting point. Read the purchase order before you accept it, because its terms may differ from your quote.
Whatever document you use, the contract that follows still matters most. See our guide to the master service agreement for longer relationships.
Sources: FAR 13.004, Legal effect of quotations; Shopify, "Is an RFQ legally binding?"; Quollnet, "Legal flavour: an invitation to treat"
Which comes first?
The usual order is RFI, then RFP or RFQ. You do not always need all three.
- Not sure what exists? Start with an RFI.
- Know the problem but not the best solution? Send an RFP.
- Know exactly what you want? Send an RFQ.
Some buyers combine steps. For example, an RFP may ask for a detailed price sheet so it does the work of an RFQ too. Federal rules also allow a draft RFP before the final one, so vendors can comment on it early.
Sources: Vroozi, "Which comes first, RFI or RFP?"; FAR 15.201(c), techniques to promote early exchanges of information
A quick decision test
Answer these four questions:
| Question | If yes | If no |
|---|---|---|
| Can you write exact specs today? | Lean toward RFQ | Lean toward RFP or RFI |
| Will you pay more for a better approach? | RFP | RFQ |
| Do you know at least three capable vendors? | RFP or RFQ | Start with an RFI |
| Is the work mostly a standard product? | RFQ | RFP |
If your answers point both ways, an RFP with a firm price section is usually the safer choice. It lets you weigh price without ignoring quality.
Sources: Akirolabs, "Project Complexity," "Evaluation Criteria," "Market Knowledge"; Shopify, "How to decide which one to use"
Common mistakes
- Sending an RFQ for complex work. You get low prices for poorly defined work, and change orders later.
- Sending an RFP for a commodity. Vendors write long proposals for something a simple price request would have settled.
- Skipping the RFI in a new market. Your RFP may ask for things nobody sells, or miss options you did not know about.
- Hiding the scoring method. Vendors write better responses when they know how they will be judged.
When you compare finalists, look past the purchase price. Setup, training and exit fees belong in the comparison too; see total cost of ownership.
Sources: Project-Management.com, "What are the tips for writing RFIs, RFPs, and RFQs?"; FAR 15.203(a)(4), evaluation factors in the solicitation
Frequently asked questions
What is the difference between an RFP and an RFQ?
An RFP asks vendors to propose a solution and is judged on several factors, including price. An RFQ asks vendors to price a clearly defined item or service and is judged mainly on price.
What does RFQ mean?
RFQ means request for quotation, sometimes called a request for quote. It is a document that asks suppliers to price exact items or services.
What is the difference between an RFI, an RFP and an RFQ?
An RFI gathers information about the market, an RFP asks for proposed solutions, and an RFQ asks for prices on known specs. They are often used in that order.
Which comes first, an RFI or an RFP?
An RFI usually comes first. It helps a buyer learn what vendors offer before writing a formal RFP or RFQ.
Is an RFQ legally binding?
No, an RFQ and the quotes sent back are usually not binding on their own. Under US federal rules a quotation is not an offer, and a contract forms only when an order is placed and accepted.
When should you use an RFP instead of an RFQ?
Use an RFP when the work is complex, vendors could solve it in different ways, and you care about more than the lowest price.
Sources
- Federal Acquisition Regulation 13.004, Legal effect of quotations. acquisition.gov/far/13.004
- Federal Acquisition Regulation 15.201, Exchanges with industry before receipt of proposals. acquisition.gov/far/15.201
- Federal Acquisition Regulation 15.203, Requests for proposals. acquisition.gov/far/15.203
- Shopify, "RFP vs. RFQ: How To Decide Which One To Use." shopify.com
- Project-Management.com, "RFI, RFP or RFQ: What's the Difference and When to Use Each?" project-management.com
- Vroozi, "RFI vs. RFP vs. RFQ: Which Does Your Company Need?" vroozi.com
- Akirolabs, "Difference Between RFQ and RFP: What to Use and When?" akirolabs.com
- Quollnet, "RFQ vs RFP vs Tender in Construction." quollnet.com