Summary
- A performance bond is a contract from a surety, usually a bank or insurer, that pays the employer if the contractor defaults.
- UK bonds are either conditional, where the employer must prove breach and loss, or on-demand, where a compliant demand triggers payment.
- A bond is typically worth around ten per cent of the contract sum and usually runs until practical completion, sometimes extending to the defects period.
- This guide explains performance bonds in construction for UK businesses, developers and funders.
- LegalVision’s business lawyers specialise in advising clients on construction contracts and performance security.
Tips for businesses
Check whether your funder requires a bond before signing the construction contract. Confirm whether the bond is conditional or on-demand, since each allocates risk differently. Review the bond value, expiry mechanism and claims procedure, and make sure they match the main contract.
A performance bond is a third-party guarantee (typically from a bank or insurer) that pays an employer if a contractor fails to perform. Bonds are either conditional (requiring proof of breach and loss) or on-demand (triggered by a compliant demand alone). They are usually set at 10% of the contract sum and run until practical completion, sitting alongside parent company guarantees and collateral warranties as standard construction security.
Who Is Involved in a Performance Bond
A performance bond is a contract. A surety issues it in your favour as a financial guarantee, and that surety is usually a bank, an insurer or a specialist surety provider. Your contractor arranges the bond and pays the premium, though you tend to pay for it indirectly, because the cost is built into the contract price.
What the bond does is give you access to funds if your contractor defaults. The bond wording sets out what counts as default, which might be non-performance, delay or insolvency. On a higher-risk project you might ask for more than one bond, or for other security alongside it. How easily you can actually get at the money depends on how the bond is drafted and what it was meant to do.
Why performance bonds are used
The main thing a bond gives you is financial reassurance. If your contractor cannot deliver, you may have to spend heavily to bring in a replacement or put right work that was not good enough. Without a bond, those costs land on you straight away, and getting the money back from the contractor can mean slow and uncertain legal proceedings. A bond keeps the project moving by giving you funds you can actually reach. It also lets you, your developers and your funders carry on, knowing a contractor failure is less likely to derail the project or turn into a building dispute.
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How Performance Bonds Work
Your contractor usually arranges the bond before work starts. How you call on it depends entirely on the wording. In the UK, performance bonds are generally one of two types, conditional or on-demand, and the difference shapes how quickly and easily you get paid.
| Conditional bond | On-demand bond | |
|---|---|---|
| How it pays out | You must prove the contractor’s breach and your resulting loss before the surety pays | The surety pays once you make a compliant demand, with no need to prove breach |
| Speed of access | Slower | Faster |
| Cost | Lower | Higher |
| Where you see it | More common on domestic projects | Large or internationally funded projects, where immediate funds matter |
The difference matters because the two types share out risk differently and have different claim processes. Whichever you hold, follow the notice provisions, evidence requirements and time limits to the letter. One procedural slip can invalidate your claim on the bond.
Cancellation requires agreement from all three parties – employer, contractor and surety – unless the bond expressly permits unilateral cancellation. Releasing a bond mid-project removes protection against any subsequent contractor default.
Deciding Whether You Need a Performance Bond
Whether you need one comes down to the nature, scale and funding of your project. Funders often insist on a bond as a condition of finance. You might want one yourself if you do not know the contractor well, or if their finances look shaky. Bonds are common on publicly funded work, where there is public money to protect. Even on a smaller job, a bond can be worth it if a contractor failure would hurt.
Verify that the bond’s wording matches negotiated terms, covering value, liability scope, expiry and claims procedure. Inconsistencies between the bond and the underlying contract documents create enforcement risk. Above all, it has to line up with your main construction contract.
Alternatives to Performance Bonds
Not every contractor can get a performance bond. A poor financial history, a short trading record or previous claims can all get in the way. If no bond is available, or you simply want extra cover, a few other mechanisms can give you security:
- A parent company guarantee, which lets you look to the contractor’s parent company for performance and recovery.
- Collateral warranties from key subcontractors, which give you direct rights against the people delivering the critical parts of the work.
If you are not sure which security fits your project, a construction solicitor can talk you through the options.
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What a Bond Does and Does Not Cover
A bond only responds within its wording and up to its cap, typically 10% of the contract sum. Costs beyond that cap fall on the employer. It covers contractor default, not employer missteps; wrongful termination or failure to follow payment and notice rules gives the surety grounds to reject a claim. On a conditional bond, proof of breach and loss (usually via adjudication or judgment) is required before payment.
All project documents, bond, building contract, and guarantees, must be read together. Misaligned expiry dates or conflicting claims procedures can defeat an otherwise valid claim.
Key Takeaways
A performance bond gives you financial protection if your contractor fails to perform, with a remedy you can call on from a third-party surety. It is a useful part of managing risk on a construction project. To make sure it actually protects you, get clear on the difference between conditional and on-demand bonds, negotiate the terms properly and follow every procedural step the bond sets out.ment in the bond.
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Frequently asked questions
What is a performance bond?
A performance bond is a contract from a surety, usually a bank or insurer, that pays you a capped sum if your contractor defaults. As the employer, developer or funder, it gives you access to funds to cover delay, remedial work or a replacement contractor.
What is the difference between a conditional and an on-demand performance bond?
A conditional bond pays only after you prove your contractor’s breach and your resulting loss. An on-demand bond pays once you make a compliant demand, without proof of breach. On-demand bonds give you faster access to funds but cost more.
What is a collateral warranty in a construction project?
A collateral warranty gives you a direct contractual link with a party you did not contract with, such as a subcontractor. If their work causes you a loss, you can claim against them directly. Construction projects use them alongside or instead of bonds.
What is a parent company guarantee?
A parent company guarantee is a promise from your contractor’s parent company to perform the contract or cover your losses if the contractor cannot. You would use one where the contractor has limited assets, giving you recourse to a stronger group company.
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