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How bidding works

Bid bonds and performance bonds explained

Bonding is the gate that keeps most small contractors out of public work, and it is misunderstood in a specific way: people think of a surety bond as insurance. It is not. Insurance is a transfer of risk you pay a premium to move onto a carrier. A surety bond is a credit instrument, a three-party guarantee in which the surety promises the public owner that you will perform, and you promise the surety that you will reimburse every dollar it pays out. If your bond is called, you owe the money back. Personally, in almost every case.

That distinction explains everything else about the process: why underwriting looks like a bank loan application, why the surety wants personal indemnity from the owners and their spouses, and why bonding capacity grows slowly with a documented track record rather than being something you can simply buy more of.

This guide covers the three bonds you will meet on public work, what triggers each one under state law, what they cost, what a surety actually looks at, and how to build capacity from a standing start.

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The short version

  • A surety bond is a credit guarantee, not insurance. If the surety pays a claim, you are contractually obligated to reimburse it, usually under a personal indemnity agreement.
  • State "Little Miller Acts" set the thresholds, not the federal Miller Act. California requires a payment bond on public works contracts over $25,000; Florida generally requires payment and performance bonds but allows exemptions at or below $100,000 for state work and $200,000 for local work at the awarding body's discretion.
  • Federal construction contracts over $150,000 require performance and payment bonds under the Miller Act; between $35,000 and $150,000 the contracting officer selects alternative payment protections.
  • Bid security at state and local level is usually 5 to 10 percent of the bid. The federal bid guarantee is different and much larger: at least 20 percent of the bid price, capped at $3 million.
  • Performance and payment bond premiums typically run roughly 1 to 3 percent of the contract value on standard programs, scaling down as contract size and contractor quality improve.
  • The SBA Surety Bond Guarantee Program backs bonds on contracts up to $9 million (non-federal) and $14 million (federal), charging the small business 0.6 percent of the contract price on performance and payment bond guarantees, and nothing on bid bond guarantees.

The three bonds, and what each one actually guarantees

Bid bond

Guarantees that if you are awarded the contract, you will sign it and provide the required performance and payment bonds. If you win and walk away, the owner can claim the difference between your bid and the next bidder's, up to the bond's penal sum.

Amounts differ sharply between federal and state practice, and this trips people up. At state and local level, bid security is typically 5 or 10 percent of the bid amount, and is often accepted as a certified or cashier's check instead of a bond. Federally, FAR 28.101-2 sets the bid guarantee at "at least 20 percent of the bid price" with a $3 million cap, a materially different instrument that exists to cover the cost of re-procurement.

Bid bonds usually carry no premium. Sureties issue them as part of the relationship, on the expectation of writing the final bonds if you win.

Performance bond

Guarantees you will complete the contract per its terms. If you default, the surety's options usually include financing you to finish, tendering a replacement contractor, or paying the owner its loss up to the penal sum. Almost always written at 100 percent of the contract value on public work.

Payment bond

Guarantees your subcontractors and material suppliers get paid. It exists because you cannot lien public property. Nobody is foreclosing on a school. The payment bond is the substitute remedy. Federally, FAR 28.102-2 requires the payment bond to equal 100 percent of the original contract price, plus 100 percent of any increase.

On public work these are usually issued together as a single performance and payment bond with two penal sums.

The others you may meet

  • Maintenance or warranty bond: guarantees workmanship for a defined period after completion, commonly one to two years, typically 10 to 25 percent of contract value.
  • Supply bond: guarantees delivery of materials under a supply contract.
  • License and permit bonds: required by a state or municipality to hold a contractor's license, unrelated to any specific project.

What triggers a bond requirement: state law first

The federal Miller Act gets all the attention. It is not the law that applies to your city paving job. Every state has its own "Little Miller Act" setting when public bonds are required, and the numbers vary widely.

California. Civil Code § 9550 requires a direct contractor awarded a public works contract "involving an expenditure in excess of twenty-five thousand dollars ($25,000)" to give a payment bond before commencing work. That is a low bar, and it means bonding is in play on very small California public jobs.

Florida. Section 255.05 of the Florida Statutes requires a payment and performance bond on public construction, but with meaningful exemptions: for state work, no bond is required where the contract is for $100,000 or less, and local officials or boards may exempt contracts of $200,000 or less at their discretion. Florida also sets tight claim deadlines. A claimant's notice of nonpayment may not be served earlier than 45 days after first furnishing labor or materials, nor later than 90 days after final furnishing, and suit on the payment bond must be brought within one year.

Federal. For comparison, FAR 28.102-1 implements the Miller Act requirement for performance and payment bonds on any federal construction contract exceeding $150,000. Between $35,000 and $150,000 there is no automatic bond. Instead the contracting officer selects two or more alternative payment protections from a list that includes a payment bond, an irrevocable letter of credit, a tripartite escrow agreement, certificates of deposit, or a security deposit, and the contractor supplies one of them.

Two practical points. First, the threshold in your state may be far lower than the federal one, so "I am too small for bonding" is often wrong. Second, non-construction service contracts (janitorial, landscaping, security, food service) are frequently bonded too, by contract term rather than by statute, so read the solicitation rather than assuming. See how to get school district janitorial contracts, how to get government landscaping contracts and how to get government security guard contracts.

What bonds cost

Bid bonds: usually no premium.

Performance and payment bonds: quoted as a rate per thousand dollars of contract value, and typically land in the range of roughly 1 to 3 percent of the contract amount for standard-market contractors, on a sliding scale that drops as contract size increases. A strong contractor with audited financials and a long clean record may be quoted below 1 percent on larger work; a new or thin-balance-sheet contractor in a specialty program may be quoted 3 percent or more.

The important budgeting point: the premium is a direct cost of the job and belongs in your bid. On a $1.2 million contract at 2 percent, that is $24,000 you either priced or absorbed. Public owners expect bond cost to be in the price; some solicitations ask you to list it as a separate line item.

The SBA Surety Bond Guarantee Program

If the standard market will not write you, the SBA guarantees bid, performance, payment and ancillary bonds issued by participating sureties. The program covers contracts up to $9 million for non-federal contracts and $14 million for federal contracts. The small business pays SBA a fee of 0.6 percent of the contract price on performance and payment bond guarantees; SBA charges no fee for bid bond guarantees, and the guarantee fee is returned if the bond is canceled or never issued. That fee is on top of the surety's own premium, so budget both.

For a contractor with two or three years of history and no bonding relationship, this is the most common route in. Work through an agent who writes SBA-backed bonds regularly. Not every agent does.

How underwriting actually works

Sureties underwrite on what the industry calls the three Cs: capital, capacity and character. In practice you will be asked for a package that looks like a commercial loan file.

  • Financial statements. Two to three years. Internally prepared may be enough for small single jobs; a review or audit by a CPA who understands percentage-of-completion accounting is generally required as you scale. This single item is the biggest constraint on capacity growth for small contractors, and it is worth the cost of a proper CPA long before you think you need one.
  • Work-in-progress schedule. Every open job: contract value, billed to date, cost to date, estimated cost to complete, gross profit. Sureties read this more carefully than the balance sheet, because it reveals whether you estimate accurately and whether you are over- or under-billed.
  • Working capital and net worth. A common rule of thumb is that a surety will support a single job roughly ten times working capital and an aggregate program roughly twenty times. That is a guideline, not a rule, and every surety applies it differently.
  • Bank line of credit. An unused, committed line materially improves your position.
  • Personal credit and personal indemnity. Owners' personal credit is checked. Owners (and usually their spouses) sign a general indemnity agreement making them personally liable to reimburse the surety.
  • Experience. Completed project history of comparable size and type. A surety will rarely bond a job several times larger than anything you have completed.
  • Continuity plan. Who finishes the work if the owner is hit by a bus. Sureties genuinely ask.

Set the relationship up before you need it. A first-time bond approval takes two to four weeks. Once you are approved with a program in place, a bid bond for a specific job can often be issued in a day or two. Chasing a surety the week a bid is due is how firms end up no-bidding work they could have won.

Building bonding capacity from nothing

Capacity is granted in steps, and the steps are predictable.

  1. Get your books right. Move to a construction-literate CPA and to percentage-of-completion accounting. Stop taking distributions that strip working capital at year end. Retained equity is exactly what the surety is measuring.
  2. Open a bank line and leave it unused. The availability is the point.
  3. Start with an SBA-backed small program. A single-job limit of $250,000 to $500,000 is a realistic first approval for a contractor with a clean two-year record.
  4. Bid work inside your limit and finish it clean. Completed, on time, subs paid, no claims. Two or three of these change the conversation.
  5. Ask for an increase with evidence. Updated financials, a clean work-in-progress schedule, and owner letters. Capacity typically increases in increments rather than jumps.
  6. Graduate to the standard market. Once you are outside SBA's program you drop the 0.6 percent guarantee fee and get better rates.

Two shortcuts while you build. Subcontract to a bonded prime. You gain public project experience and references without carrying the bond, though the prime may require a subcontractor bond from you. And target unbonded work: quotes below the state competitive threshold, service contracts that require insurance but not bonding, and cooperative contract purchases. See RFP vs RFQ vs IFB vs ITB for where those live and how much does it cost to bid on a government contract? for how the economics compare.

Common bonding mistakes on public bids

  • Submitting a bid bond without the power of attorney. The bond must be accompanied by the surety's power of attorney showing the attorney-in-fact had authority to sign. Missing it is a classic responsiveness defect that gets bids rejected at opening. See how to respond to an RFP.
  • Wrong penal sum. If the solicitation says 10 percent and the bond says 5 percent, the bid is non-responsive.
  • Wrong obligee name. The bond must name the awarding public body exactly as the solicitation states it, not the department, not the abbreviation.
  • Expired validity. Bid security must remain valid through the bid validity period, often 60, 90 or 120 days. Check the dates on the bond against the solicitation.
  • Not confirming the surety is acceptable. Many public bodies require the surety to be listed on the U.S. Treasury Department's Circular 570 list of approved sureties, to be licensed in the state, and to hold a minimum A.M. Best rating. Check before, not after.
  • Forgetting the premium in the price. On a low-margin bid, an unpriced 2 percent bond premium can be the whole profit.
  • Assuming service contracts are unbonded. Multi-year janitorial, landscaping and security contracts frequently carry a performance bond requirement by contract term.

If bonding capacity is the thing keeping you out of the work you want, it is worth mapping which opportunities in your market fall below the bonding thresholds while you build. Book a call and we will go through it.

Common questions

Is a surety bond the same as insurance?

No. Insurance transfers risk to a carrier that expects to pay claims out of pooled premiums. A surety bond is a three-party credit guarantee: the surety guarantees your performance to the public owner, and you agree to reimburse the surety for anything it pays. Sureties underwrite to zero expected loss, which is why the process resembles a bank loan and why owners sign personal indemnity.

How much does a performance bond cost?

Typically in the range of 1 to 3 percent of the contract value on standard programs, on a rate scale that falls as contract size rises and as the contractor's financial strength improves. Under the SBA Surety Bond Guarantee Program the small business also pays SBA 0.6 percent of the contract price on performance and payment bond guarantees. Price the premium into your bid as a direct job cost.

Do bid bonds cost anything?

Usually not. Sureties generally issue bid bonds without premium, treating them as part of the relationship on the expectation of writing the final bonds. SBA likewise charges no guarantee fee on bid bond guarantees. What a bid bond does cost you is underwriting time, which is why the approval should be in place before the bid.

What happens if I win a job and cannot get the performance bond?

You default on the commitment your bid bond guaranteed. The public owner can move to the next bidder and claim against your bid bond for the difference in price, up to its penal sum, and your surety will look to you for reimbursement. It is also a reputational event with both the owner and the surety market. Never bid a job you have not confirmed you can bond.

Can I get bonded as a brand new company?

It is difficult but not impossible. A first bond is much easier with two to three years of financial history, a clean personal credit record, a bank line, and completed project experience of comparable type. The realistic paths for a very new firm are the SBA Surety Bond Guarantee Program with a small single-job limit, subcontracting to a bonded prime to build a documented record, and pursuing public work below the state bonding threshold in the meantime.

Why can I not just put a lien on the property if a public owner does not pay?

Because you cannot lien public property. That is precisely why payment bonds exist on public work. They are the statutory substitute for lien rights, giving subcontractors and suppliers a claim against the bond instead of the building. The deadlines are strict: Florida, for example, requires a notice of nonpayment no earlier than 45 days after first furnishing and no later than 90 days after final furnishing, with suit within one year.

Does the bid bond amount differ between federal and local jobs?

Substantially. State and local bid security is commonly 5 or 10 percent of the bid, often satisfied with a certified check. The federal bid guarantee under FAR 28.101-2 is at least 20 percent of the bid price with a $3 million cap. If you move between federal and local work, check the requirement each time rather than relying on habit.

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