IFB
An IFB (Invitation for Bid) is a formal sealed-bid solicitation where the government awards the contract to the lowest responsive and responsible bidder.
What Is an IFB?
An Invitation for Bid (IFB) is a government solicitation that uses sealed bidding. Vendors submit sealed price bids that are opened publicly on a specified date. The contract is awarded to the lowest responsive and responsible bidder.
IFBs are the most straightforward form of competitive bidding. There is no technical evaluation, no proposal scoring, and no negotiation. The agency defines exactly what it needs, vendors provide a price, and the lowest price wins.
When Agencies Use IFBs
- Construction projects. Building, renovation, and infrastructure work where specifications are precisely defined.
- Commodity purchases. Standard products where specifications are clear and interchangeable (vehicles, fuel, office supplies).
- Services with clear scope. Grounds maintenance, janitorial services, or other work where the requirements are well-defined.
IFB vs. RFP vs. RFQ
| Factor | IFB | RFP | RFQ |
|---|---|---|---|
| Evaluation | Lowest price only | Best value (technical + price) | Primarily price with qualifications |
| Bids sealed? | Yes, opened publicly | No, scored privately | Varies |
| Negotiation? | No | Sometimes | Sometimes |
| Best for | Commodities, construction | Complex solutions | Standard products, price comparison |
Responding to an IFB
- Meet every specification. Non-responsive bids (missing a requirement) are disqualified regardless of price.
- Be the lowest price. There is no room for differentiation on quality or approach. Price is the only variable.
- Attend the bid opening. Sealed bids are opened publicly. You can see competitor pricing and learn market rates for future bids.
- Be responsive and responsible. "Responsive" means your bid meets all requirements. "Responsible" means you have the capacity and track record to deliver.
Frequently Asked Questions
What is an IFB?
An IFB (Invitation for Bid) is a sealed-bid government solicitation where vendors submit price bids that are opened publicly and the contract is awarded to the lowest responsive and responsible bidder.
What is the difference between an IFB and an RFP?
An IFB awards solely on lowest price with no technical evaluation. An RFP evaluates both technical approach and price (best value). IFBs are used for commodities; RFPs are used for complex solutions.
Are IFB bids really opened publicly?
Yes. Sealed bids are opened at a scheduled public event. All submitted prices are announced. This transparency is a key feature of the IFB process.
Can you negotiate after winning an IFB?
No. The sealed bid price is the final price. There is no negotiation in IFB procurement. The contract is awarded at the bid price submitted.
When should vendors respond to IFBs?
When you can be the lowest price on a commodity or standardized service. IFBs favor vendors with cost advantages. If your product requires differentiation on quality or approach, RFPs are better opportunities.