The difference between a bid bond and a performance bond comes down to timing and promise: a bid bond guarantees that if you win a construction bid, you’ll sign the contract at the price you quoted; a performance bond guarantees that once you’ve signed, you’ll finish the job according to the contract. One covers the pre-contract moment. The other covers everything that happens after.
They protect the same party, the project owner, but at different stages of the same project. The bid bond hands off to the performance bond the day the contract is signed.
What a Bid Bond Does
A bid bond rides along with your proposal during competitive bidding. It tells the owner that your number is real and that you’ll stand behind it if your bid wins. On federal construction projects, the bid guarantee must equal at least 20 percent of your bid price, capped at $3 million.1Acquisition.GOV. FAR Subpart 28.1 – Bonds and Other Financial Protections State and private projects often set the requirement lower, commonly in the 5 to 10 percent range.
If you win and then refuse to sign at your quoted price, the owner can file a claim against the bid bond. The payout covers the gap between your bid and the next lowest responsible bidder, up to the bond’s face value. On a large project, that gap can be painful, and it’s entirely avoidable with careful pricing before you submit.
The bid bond expires in one of two ways: the contract gets signed and the follow-up bonds are posted, or the bidding window closes without an award. For contractors with an established surety relationship, bid bonds often come at no additional cost, bundled into the ongoing bonding program. Newer firms may pay a small flat fee.
What a Performance Bond Does
The performance bond takes over the moment the contract is signed. It guarantees the owner that you’ll complete the work to specification and on schedule. On federal contracts exceeding $150,000, the performance bond must equal 100 percent of the original contract price, and it rises dollar-for-dollar with any contract price increases.2Acquisition.GOV. FAR 28.102-2 – Amount Required
If you default, the surety steps in. Most performance bonds give the surety several options: arrange for a replacement contractor to finish, fund the original contractor to get back on track, take over the contract directly, or negotiate a settlement with the owner. The surety picks the approach that minimizes its losses. The owner ends up with a finished project rather than an abandoned site.
Performance bonds don’t end on the day construction wraps. Under federal acquisition rules, the security interest continues for at least one year after final payment or through the end of any warranty period, whichever is later.3Acquisition.GOV. FAR Part 28 – Bonds and Insurance A standard one-year maintenance period falls within the bond’s coverage. Warranty periods longer than two years typically cost additional premium per year because of the surety’s extended exposure.
Premiums reflect that longer exposure. Performance bonds generally run between 1 and 3 percent of the contract value for qualified contractors, with higher-risk firms paying more. On large contracts, sureties often apply a sliding scale that lowers the rate as the contract amount climbs.
Bid Bond vs Performance Bond at a Glance
The two bonds share a purpose, but almost nothing else lines up between them.
- When it’s active: the bid bond covers only the bidding window; the performance bond runs from contract signing through completion and the warranty tail.
- What it protects against: the bid bond covers a winning bidder walking away; the performance bond covers failure to complete the work or meet specifications.
- How much it covers: a bid bond typically equals 5 to 20 percent of the bid; a performance bond covers 100 percent of the contract price on federal projects.4Acquisition.GOV. FAR 52.228-15 – Performance and Payment Bonds-Construction
- What it costs: bid bonds are often free or carry a small fee; performance bonds run 1 to 3 percent of contract value, sometimes more.
- What triggers a claim: refusing to sign the contract triggers a bid bond claim; abandoning the project, missing critical deadlines, or failing inspections can trigger a performance bond claim.
The transition from one to the other marks a shift in what you’re promising. A bid bond promises you’ll compete honestly. A performance bond promises you’ll actually build the thing.
Where Payment Bonds Fit
If you’re comparing bid and performance bonds on a federal project, you need to know a third bond is almost certainly in the stack: the payment bond. The Miller Act requires performance and payment bonds together on federal construction contracts over $100,000.5Office of the Law Revision Counsel. 40 USC 3131 – Bonds of Contractors of Public Buildings or Works
A payment bond protects a different group than the other two. It covers subcontractors, laborers, and material suppliers rather than the project owner. If the general contractor doesn’t pay the people doing the actual work, those parties file a claim against the payment bond instead of going unpaid.6Office of the Law Revision Counsel. 40 USC 3133 – Right of Persons Furnishing Labor or Material The bond exists because you can’t put a mechanics lien on government property, so the payment bond fills the gap that a lien would normally cover on private work. The amount generally matches the performance bond at the full contract price.
So on a typical federal project you move through all three in sequence: a bid bond with the proposal, then a performance bond and a payment bond posted together once the contract is awarded.
The Personal Guarantee Behind Both Bonds
One point that applies to both bid and performance bonds, and that catches contractors off guard: surety bonds are not insurance. When an insurer pays a claim, the money is gone. When a surety pays a claim, the contractor owes every dollar back.
The mechanism is the General Indemnity Agreement, which contractors sign before the surety issues any bond. The agreement makes the obligation personal. Every business owner holding 10 percent or more of the company typically signs individually, not just on behalf of the business, and spouses of married owners usually sign as well. If a claim is paid and the contractor doesn’t reimburse the surety, the indemnity agreement lets the surety pursue the personal assets of everyone who signed.
That exposure is why sureties underwrite as carefully as they do, and it’s why a bid bond claim is worth avoiding just as much as a performance bond claim. Both run through the same indemnity agreement. A bid bond payout triggered by walking away from a winning bid lands on the contractor’s balance sheet, and ultimately on the owners’ personal balance sheets, the same way a performance bond payout would.
Pricing a bid carefully before submission, and managing the work carefully after signing, are two sides of the same financial discipline. The bond type changes at the moment of signature. The exposure doesn’t.