The three bonds a construction contractor meets are talked about as a set, and they are — but they run to three different people, and mixing up which is which is how a contractor ends up believing a bond protects them when it protects somebody else.
None of these three protects you. All three protect somebody from you, and you repay the surety for any claim it pays. That is the single most useful sentence about construction surety, and everything below is a consequence of it.
Three bonds, three beneficiaries
| Bond | Runs to | Guarantees |
|---|---|---|
| Bid bond | The project owner | That if you are awarded the work you will sign the contract and post the bonds it requires |
| Performance bond | The project owner | That the contract is completed according to its terms |
| Payment bond | Subcontractors and suppliers | That the people who furnished labor and material on the job are paid |
The performance bond and the payment bond are frequently written by the same surety on the same day for the same job, which is why they get treated as one thing. They are not one thing. They have different beneficiaries, and on a bad job they can be called by different people for different reasons at different times.
When each one attaches
The bid bond attaches at the bid. It is submitted with your proposal, and its whole subject matter is the gap between “lowest responsive bidder” and “signed contract.” If you win and refuse the work, the owner has a defined remedy instead of an argument.
The performance and payment bonds attach at award. On federal work the statute is explicit that they become binding at that moment — 40 U.S.C. § 3131(b) requires them to be furnished before award and provides that they “become binding when the contract is awarded.” Before award there is nothing to perform and nobody to pay.
That timing is why the bid bond is the one that disappears. Its obligation is fully discharged the instant you do what it promised you would do.
Who is protected, and who is not
The performance bond is the owner’s instrument. If you default, the owner calls it and the surety takes over the obligation to see the work finished — by financing you, by tendering a completing contractor, or by paying. The owner’s loss is the measure.
The payment bond points the other way, down the chain. On federal work, 40 U.S.C. § 3133(b)(1) gives a right of action to a claimant who has furnished labor or material and “has not been paid in full within 90 days” after last performing or supplying. That right belongs to the subcontractor or supplier, not to the owner and not to you.
There is a second tier, and it is where most payment bond disputes actually happen. A claimant who has a direct contract with a subcontractor but no contract with the prime can still sue on the bond, but only after clearing an extra hurdle. Section 3133(b)(2) requires that claimant to give written notice to the prime contractor within 90 days of last furnishing, stating “with substantial accuracy the amount claimed and the name of the party to whom the material was furnished.”
Miss that notice and the claim is gone, no matter how good it was. And the right cannot be signed away in advance: § 3133(c) makes a waiver void unless it is in writing, signed by the person whose right is waived, and “executed after the person whose right is waived has furnished labor or material.”
The conversion at award, and what actually converts
Contractors talk about a bid bond “converting” into a performance bond. Nothing converts. The bid guarantee is discharged and two new instruments are issued.
What carries across is the underwriting. A surety that issues a bid bond has already decided it is willing to stand behind the finished contract at that price — because the bid bond’s own exposure is precisely the cost of your failure to post the performance bond. A surety will not knowingly write a bid bond it would then refuse to follow.
This is why the federal rule links them the way it does. FAR 28.101-1(a) requires a bid guarantee “whenever a performance bond or a performance and payment bond is required.” The bid guarantee is not a standalone product; it exists because the job is bonded work.
Its size follows the same logic. FAR 28.101-2(b) sets the bid guarantee “at least 20 percent of the bid price but shall not exceed $3 million” — a share of what you offered, capped, because the exposure it covers is the difference between your bid and the next one, not the value of the whole job.
What happens if you win and cannot post the bonds
This is the scenario the bid bond exists for, and it is worth being blunt about. If you are awarded the work and cannot produce the performance and payment bonds, the owner re-lets or moves to the next bidder, and calls your bid guarantee for the difference. You then owe the surety what the surety pays.
The failure mode that produces it is nearly always the same: a contractor who obtained a bid bond on a job at the edge of their capacity, and whose surety would not extend to the full contract once it looked at the awarded scope. The bid bond is the cheap instrument; the expensive lesson is behind it.
Where these rules come from on your job
The section citations above are federal. They govern contracts of the Federal Government and nothing else. On state and local public work the equivalent rules are in each state’s own public-works bond statute, and they diverge from the federal pattern more than most contractors expect — in the threshold that triggers the bonds, in the penal sum, and in the notice and suit deadlines a claimant has to meet.
On private work there may be no statute at all, and the bonds are whatever the contract documents say they are. Read them; the private forms are where the unusual conditions live.
