RFP vs. RFQ vs. IFB: Understanding Government Solicitation Types

Using the wrong approach for a given solicitation type is a common mistake that can sink an otherwise competitive proposal. More importantly, understanding the differences tells you a lot about how the agency is thinking about the acquisition and what it values most.

This guide explains every major solicitation type used in U.S. government procurement, when each is used, and how to respond effectively.

The Three Primary Solicitation Types

The Federal Acquisition Regulation defines three primary methods by which the government solicits offers:

1. Invitation for Bid (IFB): Used for sealed bidding; price is the only evaluation factor
2. Request for Proposals (RFP): Used for negotiated procurement; technical and management factors evaluated alongside price
3. Request for Quotations (RFQ): Used for simplified acquisitions and Schedule task orders; lighter-weight than an RFP

Each corresponds to a different acquisition method and comes with different rules, timelines, and response expectations.

Invitation for Bid (IFB): Sealed Bidding

What It Is

An Invitation for Bid is the solicitation document used for sealed bidding under FAR Part 14. In a sealed bid competition, all bids are submitted by a deadline and opened simultaneously in a public bid opening. Award goes to the lowest responsive, responsible bidder.

The critical characteristic of an IFB: price is the only evaluation factor. If your bid is the lowest and you are determined to be a responsible contractor, you win. Period. No technical evaluation, no past performance review, no best-value tradeoff.

When the Government Uses an IFB

FAR 14.101 requires sealed bidding when all four of these conditions are met:

1. Time permits the solicitation, submission, and evaluation of sealed bids
2. Award will be made on the basis of price and price-related factors
3. It is not necessary to conduct discussions with offerors
4. There is a reasonable expectation of receiving more than one sealed bid

IFBs are most common for:

• Construction: Building, renovation, and infrastructure projects with clearly defined specifications
• Commodities: Standardized products where specifications fully define what is needed
• Simple services: Janitorial, grounds maintenance, waste management
• Equipment: Items with published specifications that meet the requirement

If the government needs to evaluate technical approach, management capability, or past performance, sealed bidding is inappropriate. For those procurements, they use negotiated procurement (RFP).

IFB Structure

An IFB typically includes:

The standard form for sealed bidding is SF 33 (Solicitation, Offer, and Award).

How to Respond to an IFB

Because price is the only factor, your response strategy is about pricing competitiveness and compliance:

1. Analyze the Statement of Work carefully. Understand exactly what is required so you can price it accurately without leaving anything out or including unnecessary costs.

1. Develop a bottom-up cost estimate. Price every element of the work. Do not estimate at the total level, build up from labor hours, materials, equipment, and subcontract costs.

1. Research the competition. Who else is likely to bid? What are their cost structures? Winning requires being the lowest responsive bidder, so competitive intelligence is valuable even in sealed bidding.

1. Check responsiveness requirements. A bid is "responsive" if it conforms to the IFB's material terms and conditions. If the IFB requires a bid bond and you do not include one, your bid is non-responsive and will be rejected, even if you are the lowest price.

1. Verify responsibility. The government will evaluate whether you are a "responsible" contractor before awarding, even in sealed bidding. This means they will check your financial resources, ability to perform, and record of integrity.

1. Sign and seal. Submit your bid on the required form, signed by an authorized official. Late bids are rejected.

Request for Proposals (RFP): Negotiated Procurement

What It Is

A Request for Proposals is the solicitation document used for competitive negotiated procurement under FAR Part 15. Unlike an IFB where price wins automatically, an RFP allows the government to evaluate technical approach, management capability, past performance, and other factors alongside price.

An RFP is an invitation to propose a solution. The government is not certain exactly how the work should be done, they are asking offerors to tell them how they would approach it and why that approach is best.

When the Government Uses an RFP

An RFP is appropriate when:

• The requirement is complex and cannot be fully specified in advance
• The government needs to evaluate the quality of proposed solutions, not just price
• Technical innovation or creativity might improve outcomes
• Past performance matters for managing risk
• The work involves professional judgment and expertise

RFPs are used for the majority of large federal service contracts: IT systems, professional services, research and development, consulting, training, and management support.

The Evaluation Tradeoff: Best Value vs. LPTA

The most important thing to understand about an RFP is how the government will make the award decision. RFPs use one of two basic approaches:

Best Value Tradeoff: The government evaluates both technical quality and price and makes a judgment about which offer provides the best value. A technically superior offer may win over a lower-priced offer if the additional quality is worth the price premium.

Lowest Price Technically Acceptable (LPTA): The government defines a minimum technical standard ("technically acceptable") and awards to the lowest-priced offer that meets that standard. Unlike sealed bidding, there is still a technical evaluation, but once you meet the minimum bar, only price matters.

The evaluation approach is stated in Section M of the RFP (Evaluation Factors). Read it carefully. It tells you whether you should invest in a technically superior proposal or focus on competitive pricing.

RFP Structure

An RFP follows the same section structure as an IFB (Sections A-M), but with significantly more content in Sections L and M:

Section L (Instructions to Offerors): Tells you exactly how to organize and submit your proposal, including page limits, required sections, font size, formatting requirements, and delivery instructions. Follow Section L precisely, deviating from instructions can result in disqualification.

Section M (Evaluation Factors for Award): Describes the factors that will be evaluated, the relative importance of each factor, and whether the acquisition is best value or LPTA. This is the most important section in the RFP. Your proposal should directly address every evaluation factor stated in Section M.

The Standard RFP Document: SF 33 and SF 1449

For negotiated procurements, the standard solicitation forms are:

• SF 33: Used for supplies and services acquisitions above the simplified acquisition threshold
• SF 1449: Used for commercial product and service acquisitions (FAR Part 12)

Both forms serve as the cover page and contract vehicle if the award is made on the basis of the solicitation.

How to Respond to an RFP

Responding to an RFP is significantly more complex than responding to an IFB. A strong RFP response typically includes:

1. Technical Volume: Your approach to accomplishing the work. This is usually the most heavily weighted factor.

1. Management Volume: Your organizational structure, staffing plan, key personnel, and quality assurance approach.

1. Past Performance Volume: References and performance data demonstrating your ability to deliver similar work.

1. Price/Cost Volume: Your pricing, cost breakdown, and supporting data.

For detailed guidance on writing winning RFP responses, see our guide to writing winning government proposals.

Request for Quotations (RFQ): The Simplified Acquisition Workhorse

What It Is

A Request for Quotations is a lighter-weight solicitation used for:

1. Simplified acquisitions under $250,000 (FAR Part 13)
2. GSA Schedule task orders (FAR Subpart 8.4)
3. Other established contract vehicles (BPAs, IDIQs)

Unlike an IFB or RFP, an RFQ does not result in a contract when submitted. Quotes submitted in response to an RFQ are not legally binding offers. The vendor provides a quote; the government issues an order based on that quote.

Key Differences Between an RFQ and an RFP

When the Government Uses an RFQ

Contracting Officers prefer RFQs because they are faster and simpler than RFPs. You will see RFQs most often for:

• Purchases under $250,000 set aside for small businesses
• Task orders under existing IDIQ contracts or BPAs
• GSA Schedule orders (which are almost always RFQs, not RFPs)
• Supplies with firm pricing available from catalogs
• Simple, well-defined services where the requirements are clear

How to Respond to an RFQ

RFQ responses ("quotes") are typically simpler than RFP proposals:

1. Price: Quote your price clearly. Include labor rates, unit prices, or total lump-sum as appropriate.
2. Technical approach: Some RFQs ask for a brief technical approach or capability statement. Keep it concise.
3. Relevant experience: If asked, provide 1-3 brief examples of relevant past work.
4. Delivery/performance schedule: Confirm you can meet the required timeline.

Do not over-engineer your RFQ response. If the RFQ asks for a one-page technical approach, provide one excellent page, not five mediocre ones. Contracting Officers evaluating multiple quotes appreciate conciseness.

Request for Information (RFI): Market Research, Not a Solicitation

What It Is

An RFI is not a solicitation at all. It is a market research tool used by agencies to gather information before deciding how to structure an acquisition.

An RFI may ask:

• What companies can provide the required products or services?
• What are standard industry pricing structures?
• What are the key technical challenges the agency should be aware of?
• What contract vehicle or period of performance structure makes sense?
• What certifications or qualifications should be required?

There is no award from an RFI. You are not submitting a proposal. You are providing information to help the agency plan its acquisition.

Why You Should Respond to RFIs

Many contractors ignore RFIs because there is no immediate business. This is a mistake. Responding to RFIs gives you:

1. Visibility with the program office: Your company's name goes in the procurement file. The Contracting Officer and Program Manager see that you are engaged and capable.

1. Influence over requirements: Your input can shape the solicitation. If the RFI asks about ideal contract structures and you explain why a Time-and-Materials contract works better than a firm-fixed-price for this type of work, your reasoning may be reflected in the final RFP.

1. Intelligence: Reading an RFI carefully tells you what the agency is thinking, what their pain points are, and what type of solution they are expecting.

1. Early warning: An RFI is typically released 3-12 months before the formal solicitation. It gives you time to build your team, develop your technical approach, and establish relationships with the program office.

Respond to every relevant RFI. Keep your response professional and informative without revealing your proprietary pricing or strategy.

Sources Sought Notice: Market Research with a Small Business Focus

What It Is

A Sources Sought notice is similar to an RFI but specifically focused on identifying small businesses capable of performing the work. Agencies issue Sources Sought notices when they are considering whether to set aside a contract for small businesses.

A Sources Sought notice typically asks:

• Is your company a small business under the relevant NAICS code?
• If yes, which small business certifications do you hold (8(a), HUBZone, SDVOSB, WOSB)?
• Do you have relevant capabilities to perform this work?
• Would you be interested in bidding if this contract is set aside for small businesses?

The Rule of Two and Why Sources Sought Matter

Under FAR 19.502-2, the agency must set aside a contract for small businesses if there is a "reasonable expectation" that at least two small businesses will submit competitive offers at fair market prices. This is known as the "Rule of Two."

A Sources Sought notice is how the agency determines whether the Rule of Two is met. If your company responds and demonstrates capability, you are helping establish that the Rule of Two is met, which benefits all small businesses competing for the contract.

Always respond to relevant Sources Sought notices. Failure to respond can result in the contract being awarded full-and-open (open to large businesses) when it could have been a small business set-aside.

Broad Agency Announcement (BAA): Research and Development

What It Is

A Broad Agency Announcement is a specialized acquisition mechanism used by federal agencies, primarily DoD, HHS, and energy agencies, to solicit proposals for research and development.

Unlike an RFP with a specific defined requirement, a BAA is open-ended. The agency describes areas of scientific or technical interest and invites proposals from any company with a relevant idea. Proposals are evaluated by technical experts, not contracting officers.

Key Characteristics of BAAs

• Used exclusively for research and development (R&D)
• Open to all offerors without a set closing date (or with a very long window)
• Evaluated on scientific/technical merit, not price
• Awards are made on a competitive basis by technical review panels
• No formal source selection process, selections are based on peer review

When to Respond to a BAA

Respond to a BAA if:

• Your company has genuine scientific or technical innovation relevant to the agency's stated interest areas
• You have a specific research proposal with clear methodology and outcomes
• You have the technical team to execute the research

BAAs are the primary mechanism for SBIR/STTR Phase I and II awards, and for broader R&D procurements at DoD (through DARPA, Army, Navy, Air Force science offices) and NIH.

Pre-Solicitation Notice / Sources Sought: Advance Planning

What It Is

A Pre-Solicitation Notice (also called a Pre-RFP notice) announces an upcoming acquisition before the formal solicitation is released. The government is required under FAR 5.203 to post a pre-solicitation notice at least 15 days before the solicitation is released for acquisitions over $25,000.

Pre-solicitation notices are valuable because they:

• Give you advance warning of upcoming competitions
• Provide initial scope information you can use to begin planning
• Indicate the anticipated small business set-aside status
• Identify when the formal solicitation is expected to be released

Monitor SAM.gov for pre-solicitation notices in your target agencies and NAICS codes. They are your earliest warning of upcoming opportunities.

Justification and Approval (J&A): Non-Competitive Procurements

What It Is

A Justification and Approval is a document (not a solicitation) that explains why a contract is being awarded without full and open competition. By law (the Competition in Contracting Act), agencies must justify any departure from competitive contracting.

You will encounter J&As in two scenarios:

1. When you are the sole-source awardee: The agency is awarding to you without competition. You need to understand the justification to ensure compliance.

1. When a competitor is receiving a sole-source award: A J&A posted on SAM.gov tells you that a contract you could have competed for was awarded non-competitively. You can challenge this through a bid protest.

The Seven Exceptions to Competition

FAR 6.302 defines seven bases for other-than-full-and-open competition:

J&As citing exception 6.302-1 (only one source) are the most common and most frequently challenged. If you believe you can satisfy the requirement, you can ask the Contracting Officer to consider your company, or file a protest.

Other Common Acquisition Vehicles

Task Order (TO) and Delivery Order (DO)

Task orders and delivery orders are not solicitations, they are the orders placed against existing IDIQ contracts, BPAs, or contract vehicles like the GSA Schedule.

• Task Order: Issued against a services IDIQ or contract vehicle
• Delivery Order: Issued against a supplies IDIQ or contract vehicle

Getting on the right IDIQ or contract vehicle (GSA Schedule, OASIS+, etc.) is the prerequisite for competing for task orders. Once you are on the vehicle, task order competitions are typically conducted via RFQ.

Blanket Purchase Agreement (BPA)

A BPA is a simplified acquisition mechanism established with one or more vendors to fill recurring needs. Once a BPA is in place, the agency can place orders against it without issuing new solicitations for each purchase.

BPAs are established through an RFQ process. Once awarded, orders under the BPA can be placed quickly, sometimes in hours.

Basic Ordering Agreement (BOA)

A BOA is not a contract, but a framework that establishes terms and conditions under which future contracts will be issued. Unlike a BPA, a BOA requires the issuance of separate contracts for each order.

BOAs are less common than BPAs but serve a similar purpose in simplifying recurring acquisitions.

The Solicitation Timeline: From Notice to Award

Understanding the typical timeline for each solicitation type helps you plan your business development activities.

The larger and more complex the acquisition, the longer every phase takes. Factor this into your pipeline planning.

How to Find Solicitations: Where Each Type Is Posted

SAM.gov

SAM.gov is the mandatory posting location for:

• Pre-solicitation notices
• Sources Sought notices
• IFBs
• RFPs
• Broad Agency Announcements
• J&As (for non-competitive awards)
• Contract awards (for transparency)

All federal agencies must post competitive opportunities on SAM.gov if the contract value exceeds $25,000.

GSA eBuy

GSA eBuy is the platform for RFQs against GSA Schedule contracts. When an agency wants to compete a requirement among Schedule holders, they post the RFQ on eBuy. Set up an account and configure notifications for your Schedule SINs.

Agency-Specific Portals

Many agencies supplement SAM.gov with their own portals:

• DIBBS (DLA Internet Bid Board System), Defense Logistics Agency supply purchases
• NIH Electronic Research Administration: NIH grants and research contracts
• NASA SEWP: NASA's IT contract vehicle portal
• Seaport-NxG: Navy professional services

State and Local Portals

For the $1.5 trillion state and local procurement market, opportunities are scattered across thousands of portals, each state, county, city, school district, transit authority, and utility with its own system. Manually monitoring all of them is impractical.

Bidovate's opportunity discovery platform solves this by automatically monitoring SAM.gov, GSA eBuy, and over 1,000 additional federal, state, and local portals. You receive a unified, filtered feed of relevant solicitations across the entire $2.2 trillion public procurement market, regardless of where they are posted.

Bid Protest Rights: What to Do When Something Goes Wrong

If you believe an agency has conducted a flawed acquisition, misapplied evaluation criteria, made an arbitrary source selection decision, issued a sole-source J&A improperly, or violated the FAR, you have the right to file a bid protest.

The three venues for federal bid protests are:

The GAO is the most common venue for bid protests. GAO protest decisions are published and freely searchable online, making them an excellent source of guidance on FAR interpretation and proper acquisition procedures.

Important protest deadlines:

• Pre-award protests (challenging solicitation terms): Must be filed before the proposal deadline
• Post-award protests: Must be filed within 10 calendar days of learning of the award (for full GAO standard protest timing)
• Some exceptions apply, consult a government contracts attorney for specific situations

Using Bidovate to Navigate Solicitation Types

Understanding solicitation types is one thing. Finding the relevant ones across the fragmented U.S. procurement landscape is another challenge entirely.

Bidovate's opportunity discovery platform normalizes solicitation data from thousands of sources so you can search across all solicitation types simultaneously. Filter by:

• Solicitation type (RFP, RFQ, IFB, Sources Sought, Pre-Solicitation)
• Agency
• NAICS code
• Dollar value range
• Set-aside type
• Posted date

Bidovate's Mevin AI assistant can analyze a solicitation document and tell you what type it is, what the evaluation criteria are, whether it is a best-value or LPTA procurement, and what the key compliance requirements are, saving you hours of manual document review.

The platform covers the full $2.2 trillion U.S. public procurement market, including SAM.gov, GSA eBuy, FPDS, state procurement portals, and specialized agency systems.

Book a demo to see how Bidovate streamlines your solicitation monitoring and response process.

Frequently Asked Questions

What is the difference between a quote and a proposal in government contracting?

A quote is submitted in response to an RFQ (Request for Quotations) and is not a legally binding offer. The government can accept or reject quotes without those quotes becoming contracts. A proposal is submitted in response to an RFP (Request for Proposals) and is a binding offer, the government can accept it and form a contract without further negotiation. This distinction matters because proposals create legal obligations that quotes do not.

Can the government award a contract from an RFI?

No. An RFI is a market research tool with no procurement authority. The government cannot award a contract in response to information provided in an RFI response. If you provide proprietary pricing or a detailed technical approach in an RFI response, the government is not obligated to protect it. Treat RFIs as marketing opportunities, not sales opportunities. Provide enough information to demonstrate capability and interest, but save your proprietary approach for the formal RFP response.

What happens if I miss the proposal deadline for an RFP?

Late proposals are almost always rejected without evaluation. FAR 15.208 governs late proposals and establishes a strict rule: a proposal received after the exact deadline stated in the solicitation is not accepted unless it meets one of three narrow exceptions (government control, government delay, or electronically transmitted proposals). There are very few exceptions, and "my upload failed at the last minute" typically does not qualify. Submit proposals at least a few hours before the deadline to account for technical problems.

What is an amendment to a solicitation, and why does it matter?

An amendment is an official change to a solicitation issued by the Contracting Officer. Amendments can change the deadline, modify requirements, add or remove evaluation criteria, answer questions from offerors, or correct errors. You must acknowledge receipt of all amendments in your proposal response. Failure to acknowledge an amendment can result in your proposal being found non-responsive. Monitor SAM.gov for amendments to solicitations you are responding to right up until the submission deadline.

Is an oral presentation required for RFP responses?

Oral presentations are not always required, but many agencies use them, especially for services contracts where key personnel and management approach are important evaluation factors. The solicitation (Section L) will state whether oral presentations are required and how they will be conducted. If required, they are usually evaluated under the Management or Technical factor and can significantly affect your score. Prepare thoroughly and rehearse with your proposed team.

Mastering government solicitation types is foundational to government contracting success. For next steps, read our guide on how to write a winning government proposal and explore the Federal Acquisition Regulation guide for the regulatory framework behind each solicitation type.