Procurement basics
IFB vs RFP vs RFQ: What's the Difference?
8 min read · Updated August 14, 2026
Quick answer
The difference between the three main government solicitation types comes down to how the award is decided. An Invitation for Bid (IFB) goes to the lowest responsive, responsible bidder — price wins. A Request for Proposal (RFP) is awarded on best value, weighing price against technical approach and past performance. A Request for Quote (RFQ) asks vendors to quote pricing on a defined item or service, typically for smaller buys, and the agency awards by issuing an order. Knowing which one you're looking at tells you exactly how to compete.
Key takeaways
- IFB = lowest price wins (sealed bidding, no negotiation).
- RFP = best value wins (price + technical + past performance, negotiations allowed).
- RFQ = a request for pricing, usually for smaller or commercial buys; a quote isn't a binding offer.
- Always read the evaluation criteria first — they tell you how the award is really made.
- Match your response strategy to the type: sharpen price on an IFB, tell a strong value story on an RFP.
IFB vs RFP vs RFQ at a glance
| Attribute | IFB | RFP | RFQ |
|---|---|---|---|
| Full name | Invitation for Bid | Request for Proposal | Request for Quote |
| How the award is decided | Lowest responsive, responsible bidder | Best value — price weighed against non-price factors | Government selects from quotes and issues an order |
| What matters most | Price (and price-related factors) | Technical approach, past performance, and price together | Price and availability for a defined item/service |
| Negotiation / discussions | No — sealed bids, no discussions | Yes — discussions and revisions are common | Usually minimal; quotes aren't binding offers |
| Typically used for | Well-defined work where specs are clear | Complex work where approach and quality vary | Smaller or commercial buys under simplified thresholds |
What is an Invitation for Bid (IFB)?
An Invitation for Bid — also called sealed bidding — is used when the government knows exactly what it wants and can describe it in clear specifications. Bidders submit sealed prices, which are opened publicly at a set time, and the contract goes to the lowest responsive, responsible bidder. There are no negotiations and no points for a clever approach: the work is defined, so the competition is about price and about following the instructions exactly. "Responsive" means your bid meets every material requirement; "responsible" means you can actually perform. Miss a required form and even the lowest bid gets thrown out.
What is a Request for Proposal (RFP)?
A Request for Proposal is used when the work is complex enough that how you do it matters, not just the price. The agency evaluates proposals on best value — a weighted tradeoff between price and non-price factors such as technical approach, staffing, management plan, and past performance. Discussions and revised proposals are common. Because a stronger proposal can beat a cheaper one, an RFP rewards contractors who can clearly prove they will deliver quality and reduce the agency's risk. Read the evaluation criteria closely and answer them point for point.
What is a Request for Quote (RFQ)?
A Request for Quote asks vendors to quote pricing (and often delivery) for a reasonably well-defined item or service. RFQs are common for smaller or commercial purchases handled under simplified acquisition procedures, and for orders against existing contract vehicles like GSA schedules. A key legal distinction: a quote is not a binding offer the way a sealed bid is. The government makes the award by issuing a purchase order, which the vendor then accepts. RFQs move faster and carry lighter paperwork than full RFPs.
Why the distinction changes how you respond
Identifying the solicitation type is the first thing you should do, because it dictates your whole strategy:
- On an IFB, win on price and precision. Sharpen your estimate and double-check that every required form and certification is included, because a technicality can disqualify a low bid.
- On an RFP, win on value. Invest in a proposal that answers each evaluation factor, cites specific past performance, and makes your approach easy to score highly.
- On an RFQ, win on responsiveness and price. Quote quickly and accurately; the buy is usually smaller and speed matters.
For the full pursuit process around any of these, see How to Win Government Contracts. And if you're pursuing federal work, you'll need an active SAM.gov registration before you can be awarded a contract.
How GovBid Finder helps
GovBid Finder surfaces solicitations of every type — IFBs, RFPs, and RFQs — from federal, state, and local sources, and scores each one against your company profile so you can quickly see what fits and how you'd compete. It's free to use, and you only pay 3% when you win.
Frequently asked questions
What is the main difference between an IFB and an RFP?
What is the main difference between an IFB and an RFP?
An IFB (Invitation for Bid) is awarded to the lowest responsive, responsible bidder — price is essentially the deciding factor, and there are no negotiations. An RFP (Request for Proposal) is awarded on best value, meaning the agency weighs price against non-price factors like technical approach and past performance, and discussions with bidders are common. In short: IFB competes on price; RFP competes on value.
What is the difference between an RFQ and an RFP?
What is the difference between an RFQ and an RFP?
An RFQ (Request for Quote) asks vendors to quote a price for a fairly well-defined item or service, usually for smaller or commercial purchases; a quote is not a binding offer, and the government makes an award by issuing a purchase order. An RFP is used for larger, more complex requirements, invites detailed proposals evaluated on best value, and results in a negotiated contract.
Do I have to be the lowest bidder to win an RFP?
Do I have to be the lowest bidder to win an RFP?
No. RFPs are awarded on best value, so a higher-priced proposal with a stronger technical approach and better past performance can — and often does — beat a lower-priced one. Only sealed-bid IFBs award strictly to the lowest responsive, responsible bidder.
What does 'responsive and responsible' mean on an IFB?
What does 'responsive and responsible' mean on an IFB?
'Responsive' means your bid conforms to every material requirement of the invitation — the right forms, format, and terms. 'Responsible' means you have the capacity, experience, financial resources, and integrity to actually perform the work. On an IFB you must be both to win, even as the lowest bidder; a non-responsive low bid gets rejected.
How can I tell which type of solicitation I'm looking at?
How can I tell which type of solicitation I'm looking at?
Check the solicitation's title and instructions. The document will identify itself as an Invitation for Bid, Request for Proposal, or Request for Quote, and its evaluation section will tell you how the award is made — lowest price (IFB), best value tradeoff (RFP), or selection from quotes (RFQ). Always read the evaluation criteria before you decide how to respond.
What about a 'Sources Sought' notice or an RFI?
What about a 'Sources Sought' notice or an RFI?
Those aren't solicitations you bid on — they're market research. A Sources Sought notice or Request for Information (RFI) helps the agency learn what vendors and capabilities exist before it writes a real solicitation. Responding is still worthwhile: it puts your company on the agency's radar and can shape the requirements that follow.
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