Invitation for bids (IFB / ITB)

An invitation for bids (IFB), also called an invitation to bid (ITB), is the solicitation used for sealed bidding. Bidders submit firm prices by a set time, bids are opened publicly, and the award goes to the lowest-priced bid that is responsive to the requirements and from a responsible bidder.

There are no discussions or negotiations, so the specification has to be complete. Public construction is most often bought this way.

1. 01

   vs. Request for proposals (RFP)

   An RFP allows negotiation and best-value tradeoffs; an IFB is price-only once a bid is responsive. What is RFP?

2. 02

   vs. Sealed bidding

   Sealed bidding is the method; the IFB is the document that starts it. What is Sealed bidding?

BidRover lists 20 open bids titled "invitation to bid" right now. Newest first:

1. Clear Hills County - Invitation to Bid - 2026 or 2027 Half Ton Crew Cab Pickup TruckCanada · Due Nov 20, 2026
2. Silvera for Seniors - Invitation to Bid - SLV-2026-012-A Beaverdam Commons Floor Replacement – 54 Suites & Common AreasCanada · Due Nov 16, 2026
3. Invitation for Bid for General Contractors and Subcontractors for New Raynham Public Safety BuildingMassachusetts, United States · Due Oct 29, 2026
4. Invitation for Bids to for Ocean Springs Harbor Project.Mississippi, United States · Due Nov 17, 2026
5. Invitation to Bid - Asset Disposal Auction Ref. No. 2026-002 – Various Ict Equipment, Office Furnitures, Electronics & Appliances - by Lot & Individual BidPhilippines · Due Oct 23, 2026

1. acquisition.gov/far/part-14