Sealed Bidding

Sealed bidding is the government procurement method used when requirements are clearly defined and price is the sole basis for award, vendors submit fixed price bids that are publicly opened and read, with the contract going to the lowest responsive, responsible bidder.

What is Sealed Bidding?

Sealed bidding is one of two primary competitive procedures under FAR Part 14, used alongside competitive proposals. The key distinction is that sealed bidding involves no negotiation, the government sets exact specifications, vendors submit their best price in a sealed bid, and the government awards to whoever submitted the lowest price from a responsive, responsible bidder.

The sealed bidding process follows these steps:

1. Invitation for Bids (IFB): The agency prepares and posts an IFB on SAM.gov specifying exactly what is needed, when, and the evaluation criteria (lowest price)
2. Bid preparation: Vendors prepare their price bids without knowing competitors' prices
3. Bid submission: Bids are submitted in sealed envelopes by the specified deadline; late bids are rejected
4. Public bid opening: At the specified time, the agency opens all bids publicly and reads the prices aloud, any member of the public may attend
5. Responsiveness check: The agency reviews whether each bid meets all IFB requirements (a responsive bid complies with all material terms)
6. Responsibility determination: The apparent low bidder must be determined responsible (financially capable, past performance acceptable)
7. Award: Contract goes to the lowest responsive, responsible bidder

Sealed bidding is appropriate when: requirements are clearly defined, price is the only evaluation factor, adequate competition exists, and sufficient time allows for the process.

Why Sealed Bidding matters for government contractors

Sealed bidding is the most transparent and price-focused procurement method. There is no opportunity to negotiate or submit a "best and final offer", your submitted bid price is your only shot. Contractors must price accurately and competitively upfront. Cost modeling and understanding competitors' likely cost structures is critical. Construction contracts, commodity purchases, and many supply contracts use sealed bidding, making this the dominant procurement method for those sectors. Federal construction contracts almost always use sealed bidding with an IFB.

Example

The Army Corps of Engineers needs to repave a 2-mile access road at a military installation. Because the requirements are fully specified, exact dimensions, materials, drainage specifications, and schedule, the Corps uses sealed bidding via an IFB. Five contractors submit sealed bids at the public opening. The Corps reads prices aloud: $1.2M, $1.4M, $1.55M, $1.7M, and $2.1M. After confirming the low bidder is responsive (bid meets all IFB terms) and responsible (financially capable, adequate equipment), the Corps awards the contract at $1.2M with no further negotiation.

Frequently Asked Questions

When must the government use sealed bidding versus competitive proposals?

FAR 6.401 states agencies must use sealed bidding when four conditions are met: (1) time permits solicitation and evaluation; (2) award will be based on price and price-related factors only; (3) it is not necessary to conduct discussions with offerors; and (4) there is a reasonable expectation of receiving more than one bid. When these conditions are not met, competitive proposals are appropriate.

What makes a bid non-responsive?

A bid is non-responsive if it fails to comply with a material requirement of the IFB, for example, failing to acknowledge a material amendment, conditioning the bid on changes to specifications, or omitting required certifications. Non-responsive bids are rejected without consideration of price.

Can a bidder withdraw their sealed bid after opening?

Withdrawal is generally not allowed after public opening unless there is a mistake in the bid. A bidder who discovers a clerical error may request withdrawal before award, but must demonstrate the mistake was genuine and not a pricing strategy.

What is a bid bond in sealed bidding?

Construction IFBs typically require a bid bond, usually 20% of the bid price, guaranteeing that the bidder will enter into the contract at the bid price if selected. If the low bidder refuses to sign the contract, the government collects on the bond.