What Happens When a Surety Bond Is Called?

Most bonds expire quietly. The job finishes, the date in the wording passes, and nobody ever thinks about it again.

But contractors rarely ask what happens if that does not go to plan, partly because asking feels like admitting you might fail. It is a fair question, and the answer changes how you negotiate a bond wording in the first place.

So here is what actually happens, including the part the surety market tends not to lead with.

What “calling a bond” means

A bond is called when your customer – the employer or obligee – formally demands payment from the surety on the basis that you have not met your obligations.

It is not a step anyone takes lightly. Routine disputes, variations and short delays do not trigger it. A call usually follows something serious: insolvency, abandonment of the works, or a material breach that the employer has already tried and failed to resolve with you directly.

What happens next depends almost entirely on one thing: which type of bond you signed.

If you have a conditional bond

This is the ABI-style bond commonly used with JCT contracts, and the more balanced of the two.

1. The employer notifies the surety. The demand has to follow the notification requirements set out in the bond. Getting this wrong can invalidate the claim, so the wording matters enormously to both sides.
2. The employer must evidence the default. Under a conditional bond, a demand typically has to be supported by proof – often a court judgment, an arbitrator’s award or an adjudicator’s decision against you, or a certificate from the employer’s agent confirming the breach. This is the crucial protection: the employer cannot simply assert that you failed.
3. The surety investigates. It reviews the contract, the bond wording and the circumstances, and decides whether the claim is valid.
4. Damages are established and ascertained. The surety pays proven, quantified loss, not the full bond value by default. The loss is normally calculated net of any sums already due to you before the breach.
5. Payment is made, up to the bond value. The bond value is a ceiling on the surety’s liability, not an automatic payout.

That process takes time – weeks or months, not days. From your point of view, that delay is protection, because it gives room to resolve the position before money moves.

If you have an on-demand bond

The picture is very different.

An on-demand bond is not linked to proving your default. The employer presents a compliant demand and the surety pays. Timescales are short: on-demand bonds typically require settlement within around five working days.

Your ability to resist is extremely limited. In practice, the defence available is proven fraud, which is a high bar and rarely met. You argue about whether you were actually in breach afterwards, having already lost the money.

Wording is everything here, and it is litigated. In CR Construction v Barclays Bank, a dispute arising from a £117m residential development in Manchester under an amended JCT design and build contract, the mechanics of the demand under the bond were exactly what the case turned on. Kennedys has published a case review setting out the drafting points that arose.

The practical lesson is simple: contractors routinely spend more time negotiating the price of a bond than the wording of it. The wording is worth more.

The part that gets left out: you owe the money

Here is the point most competitors bury, and the one you most need to understand.

A surety bond is not a transfer of risk away from you.

When the surety issues your bond, you sign a deed of counter-indemnity. That document gives the surety the right to recover from you anything it pays out under the bond. It is not incidental small print – it is the mechanism that lets the surety extend an unsecured guarantee in the first place, without taking a charge over your assets or a slice of your bank facility.

So if a bond is called and the surety pays your employer £150,000, you owe the surety £150,000.

Counter-indemnities can contain onerous obligations and are worth reading properly, with advice, before you sign. Where security beyond a company indemnity is required – a personal guarantee or a cash deposit – that too can be enforced if a valid call is made.

This is not a reason to avoid bonds. It is a reason to understand what one is: a guarantee to your customer that lets you win work, not insurance for you.

A common misconception worth correcting

You will read that when a bond is called, the surety takes over the project, appoints a replacement contractor and finishes the job.

That describes the American market, where sureties commonly have step-in and completion options. It is not how UK construction bonds usually work. A UK surety under an ABI-style bond will normally pay ascertained damages up to the bond value. It does not become your replacement.

Be careful with any guidance on this topic that does not distinguish between the two markets – a great deal of the material online is written for the United States and simply does not apply here.

What happens if you are insolvent

Insolvency is the most common trigger for a call, and it changes the dynamics.

The employer claims, and the surety pays. The surety then calls the counter-indemnity – but in an insolvency it ranks as an unsecured creditor, which usually means it recovers little.

That has a consequence worth knowing: because a surety’s prospects of recovery are poor once you are insolvent, it has a strong interest in working constructively with you while you are still solvent and trading. If problems are emerging, early conversation is genuinely in everyone’s interest. The worst approach is silence.

It also explains why underwriters scrutinise accounts so closely at the outset, and why the market has tightened. Sureties have withdrawn from UK construction in recent years, and contractors have found bonds harder to obtain or more expensive. As industry commentators have noted, there is an irony in that: the higher the bond cost, the more clearly it reflects the surety’s assessment of insolvency risk – and the more reason there is for the client to insist on one.

If a call is threatened

• Take advice immediately, before responding to the employer or the surety.
• Check the notification requirements in the bond. Demands that do not comply may be invalid.
• Establish which type of bond it is. Conditional and on-demand demand completely different responses, and on completely different timescales.
• Talk to your surety early. It has an interest in limiting what it pays, and a solvent contractor is a better outcome for everyone.
• Check what is due to you. Loss is normally assessed net of sums already owed under the contract.

Reducing the risk before you sign

Most of your protection is decided at the point the bond is arranged, not at the point it is called.

Push for a conditional wording where the contract allows it. Get an expiry event that reflects the risk – practical completion rather than the end of the defects period, where that is negotiable. Read the counter-indemnity, and know exactly what security you are giving. And have the bond wording reviewed by someone who reads these regularly, not once a year.

Talk it through before you commit

Aedis Surety arranges performance bonds and the wider range of surety bonds through insurance-backed markets, and part of that job is making sure you understand the wording you are signing and the indemnity that sits behind it.

Our FAQs cover the questions that come up most often, and you can contact the team to discuss a specific bond or contract.