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Performance and payment bonds for plumbing contractors
A performance bond guarantees you'll finish the plumbing work to the contract, and a payment bond guarantees your subs and suppliers get paid. Federal construction contracts over $150,000 require both, most states set their own rules for public work, and many commercial owners ask for them too.
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What performance and payment bonds mean for a plumbing contractor
Performance and payment bonds are the price of entry for most larger public jobs and many commercial ones. They tell the owner that a surety company stands behind your contract. Most bonded jobs also start with a third bond at bid time.
- Bid bond. Backs your promise to sign the contract at the price you bid if you win.
- Performance bond. Guarantees you'll finish the work the way the contract says.
- Payment bond. Guarantees the subs and suppliers on your job get paid.
Picture a plumbing package on a new elementary school: underground waste, domestic water, fixtures and a pair of commercial water heaters. The district's bid documents ask for all three bonds. Without a surety lined up, you can't turn in a bid that counts.
These bonds protect the owner and the people below you on the job. They don't protect your shop. If the surety pays a claim, it expects you to repay it, so think of a bond as the surety lending you its credit.
What contract bonds cover, and what they don't
| What it covers | What it usually doesn't |
|---|---|
| The owner's cost to finish or correct the work if you default (performance bond) | Your own losses on the job, since you repay the surety |
| Subs and suppliers you don't pay on a bonded job (payment bond) | Injury or property damage to others (that's general liability) |
| The owner's loss if you win and refuse to sign at your bid price (bid bond) | Injuries to your crew (that's workers' comp) |
| Claims up to the bond amount, often 100% of the contract on federal work | Fixtures and pipe stolen from the site before install (that's an installation floater) |
| Second-tier claimants on federal jobs, such as a supplier to your sub | Liability limits a GC asks for above your primary policies (that's an umbrella) |
How contract bonds show up for a growing plumbing shop
These are illustrations, not real claims. Names and numbers are made up.
The first federal bid
Example scenario: A six-tech commercial shop wants to bid a $220,000 restroom and domestic water upgrade at a federal office building. Because the contract is over $150,000, the bid package calls for performance and payment bonds. The owner has never been bonded. The surety wants two years of financial statements and a list of open jobs before it will issue the bid bond, and the bid is due in nine days.
The supplier who wasn't paid
Example scenario: A slow-paying GC squeezes a plumbing sub's cash flow, and the sub falls 60 days behind with its pipe and valve supplier. The supplier files a claim on the sub's payment bond. The surety pays the supplier, then turns to the plumbing company to pay it back under the indemnity agreement.
Hitting the ceiling
Example scenario: A shop with three bonded jobs underway finds a fourth it wants to bid. Its surety says no, because the open backlog already uses most of what it's willing to back. The shop finishes one job, delivers clean year-end statements, and gets approval for the next bid.
Surety capacity and what drives the price
Your bonding capacity is the amount of bonded work a surety is willing to back for you, on one job and in total. The surety sets it. It isn't something you buy in a fixed size like a liability limit.
Sureties underwrite on what the industry calls the three Cs.
- Capital. Your balance sheet, working capital and bank relationships.
- Capacity. Whether your crews, equipment and management can handle the job on top of the work you already have.
- Character. Your track record, references and credit.
To raise your capacity, give the surety reasons to trust bigger numbers. Keep your books current and separate from your personal money. Keep a work-in-progress schedule that shows each job's contract value, billings and estimated cost to finish. Grow in steps, so each bonded job you finish supports the next, larger one.
Pricing works differently from a license bond. A contract bond is priced job by job, based on the contract amount and how the surety rates your finances and history. We won't quote a percentage here, because we couldn't find a published range we trust. Your price depends on payroll, revenue, claims history, the work you do and the limits you choose, and on a bond, mostly on your financial strength.
If no surety will back you yet, the SBA's Surety Bond Guarantee program may help. It guarantees bonds for qualifying small businesses on contracts up to $9 million, or $14 million on federal work. The SBA charges a 0.6% guarantee fee on performance and payment bonds. That fee is separate from the surety's own premium.
Who needs contract bonds most
Bonds follow the type of work, not the size of your shop.
- Commercial and new construction plumbers see them first, on public schools, municipal buildings and larger private projects. See insurance for commercial and new construction plumbers.
- Sewer and underground contractors bidding city water or sewer work often face bonds plus street permits. See drain and sewer contractor insurance.
- Residential service shops rarely need them until they bid a housing authority, a school district or a facilities contract. That first bid is a good time to set up a surety relationship.
Bonds usually arrive with higher insurance limits, too. Many commercial contracts ask for more than $1 million per occurrence and $2 million aggregate on general liability, often met with an umbrella policy.
Bond requirements by state
Federal jobs follow the FAR thresholds above. State and local public work follows each state's Little Miller Act, and the amounts and thresholds differ by state. Your bid documents will name the bonds and amounts. When in doubt, ask the public owner before bid day.
One footprint state ties surety directly to licensing. Starting July 1, 2026, Tennessee lets a contractor post a surety bond of at least 50% of the requested monetary limit in place of the reviewed or audited financial statement the board normally wants. See Tennessee plumber insurance.
Bid rules also vary by city and county. For licensing, bond and insurance rules where you work, see plumber insurance by state.
Coverages that pair with contract bonds
Contract bond questions
What's the difference between a performance bond and a payment bond?
How much does a performance bond cost for a plumbing job?
Do I need a bond on a public plumbing job under $150,000?
How do I increase my bonding capacity?
Can a new plumbing business get a performance bond?
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