What happens if your builder goes bust in the middle of a project? Work stops, the builder's obligations are usually suspended, and the employer must decide quickly whether to terminate, how to secure the site and which security, such as a performance bond, retention money or collateral warranties, it can use to pay the higher cost of finishing the job. The risk is real: construction recorded 3,873 company insolvencies in England and Wales in the 12 months to September 2026, more than any other industry, according to Insolvency Service figures released on 20 October 2026. In the same week, the Commercial Payments Bill, which would ban cash retentions in construction, cleared the House of Lords. This analysis explains, for employers, developers, funders, main contractors and their advisers, what the contract and statute say and which early decisions most affect how much money is lost.
What Happens if Your Builder Goes Bust? Termination, Bonds, Retentions and Warranties
By The Corporate INTL Newsroom · 29 October 2026
What happens if your builder goes bust: the short answer
The project does not end automatically, but the employer's rights now depend on the contract's insolvency clauses, the insolvency procedure the builder has entered and the security obtained at the start.
Under the widely used JCT forms, as Simmons & Simmons explains in its analysis of JCT contracts and insolvency, the contractor's obligation to carry out the works is automatically suspended, and the employer's payment obligations are suspended until a final account, whether or not the employer serves a termination notice. The employer can then terminate and engage others to complete.
The employer's loss is usually the gap between the original price and the real cost of completion by a new contractor, plus delay, fees and defects. Whether it is recovered depends on three things:
- The contract. Whether payments stop and the extra cost of completion becomes a debt.
- The security. Whether there is a bond, a parent company guarantee, retention or collateral warranties to call on.
- The insolvency process. Whether an administrator wants to sell or novate the contract, or a liquidator simply realises assets.
Because unsecured creditors rarely recover in full, security and speed usually matter more than the size of the claim.
Why construction insolvency is in the spotlight again
Construction remains the industry with the most company insolvencies in England and Wales. The Insolvency Service's September 2026 release recorded 1,882 company insolvencies across all sectors that month, 4% fewer than in August 2026 and 5% fewer than in September 2025. Over the 12 months to September 2026, construction accounted for 3,873 cases, 17% of those where the industry was known, ahead of wholesale and retail trade on 3,364, and only 2% down on the previous year.
Large failures show how far the effects reach. Eight companies in the contractor ISG's group entered administration on 20 September 2024. Government guidance at the time set out the usual split: dismissed employees could claim statutory redundancy pay, arrears, notice pay and holiday pay from the Insolvency Service, while workers, self-employed contractors and unpaid suppliers were told to register as creditors with the administrators.
Administration, liquidation or CVA: why the procedure matters
The procedure decides who controls the builder and whether the contract can be rescued. The Royal Institution of Chartered Surveyors' practice information on termination of contract, corporate recovery and insolvency, reissued in September 2025, summarises the main routes.
- Administration. The administrator must try to rescue the company, failing that get creditors a better result than a winding up, and failing that realise property for secured and preferential creditors. The business may keep trading while a buyer is found, sometimes through a pre-packaged sale.
- Liquidation. The company stops trading and a liquidator realises and distributes its assets.
- Company voluntary arrangement. A compromise with creditors, usually started by the directors, that may let the company keep trading.
A sole-trader builder is an individual, so the relevant process is bankruptcy. Our explainer on what happens when a company goes into administration covers claims and the order of payment. For a project, the key difference is that an administrator may sell the business or novate live contracts to a buyer, while a liquidator generally will not. Check which event has occurred, and when, before acting: insolvency clauses are triggered by defined events, and terminating on the wrong basis can itself be a breach.
What the building contract says: suspension and termination
The building contract, read with any bespoke amendments, decides most of what the employer can do. On termination under the JCT forms, the employer can engage others to complete and make good defects, the contractor must hand over design documents, remove plant and, if required, assign its supply agreements and sub-contracts. After completion, the employer prepares a statement of expenses properly incurred and direct loss, set against sums already paid and what would otherwise have been payable. Any excess is a debt owed by the contractor; if the balance runs the other way, the employer owes it.
Statute helps on payment. Section 111 of the Housing Grants, Construction and Regeneration Act 1996, the Construction Act, normally requires the payer to pay the notified sum unless it serves a pay less notice. Subsection (10) disapplies that duty where the contract says the payer need not pay if the payee becomes insolvent, and the payee became insolvent after the last date for a pay less notice. A well-drafted contract can therefore avoid paying an insolvent builder a sum that fell due just before the collapse.
Terminating is not always right. The same analysis notes that keeping the contract alive can allow a novation to a replacement contractor and may matter where an agreement for lease depends on it. It warns that the employer should be certain the contractor is insolvent first, because a wrongful termination could be a repudiatory breach, and that funder consent may be needed.
The first 14 days: securing the site and the evidence
Most avoidable losses happen in the first fortnight, through theft, weather damage, lapsed insurance and lost records. RICS's guidance translates into this checklist.
| Step | What to do | Why it matters |
|---|---|---|
| Secure the site | Make it safe, secure materials and plant, consider a security firm | Prevents losses that build up over time |
| Insurance | Arrange interim cover and tell the insurer, covering fire, theft and weathering | The contractor's insurance obligations may cease on termination |
| Record the works | Record progress and schedule the work remaining at termination | Baseline for the final account and any bond claim |
| Materials | Schedule materials on and off site; move paid-for items held at the insolvent party's premises | Proves ownership |
| Defects | Schedule defects, with intrusive checks where poor work is suspected | Distress can lead to corners being cut |
| Security documents | Review the bond, guarantees and warranties; notify the surety | Bond notice and timing rules are strict |
| Payments | Withhold payments and retention release in line with the contract and the Construction Act | Avoids paying unrecoverable sums |
Scaffolding is often owned by a third party, so decide whether to keep it. Site safety responsibilities do not pause: RICS stresses that the employer must cover the main contractor's safety role until a new contractor is appointed. Insurance advisers can confirm the cover an unoccupied site needs.
Performance bonds and parent company guarantees
A performance bond is a third-party promise to pay the employer up to a capped sum if the contractor fails to perform, and it is often the main protection when a builder goes bust. According to Cripps' January 2026 guide, a bond is typically for up to 10% of the contract sum and usually lasts until practical completion or the end of the defects period.
On-demand bonds give the best security but are rarely found in UK construction and are more common overseas. The usual UK form is a default bond, most often the Association of British Insurers model, under which the employer must establish the contractor's liability and prove actual loss, often only after completion, although a quantity surveyor's estimate may support an interim claim.
Insolvency raises a drafting trap: Cripps notes it is not automatically a breach under most standard forms, so the employer may need to show its loss flows from a breach, such as non-payment of the post-termination debt. Many employers therefore ask for bond wording that makes insolvency an express event of default.
A parent company guarantee is only as strong as the parent; in a group-wide failure such as ISG's, a guarantee from the same group may be worth little. Check the notice, address and expiry terms of every security document on day one.
Retention money when the builder goes bust
Retention is the share of each interim payment held back as security, and when the builder goes bust the employer can normally set it against completion and defect costs. It is rarely enough: in the RICS worked example below, even after a £22,700 retention was deducted, the insolvent party still owed £188,500.
For subcontractors, retention held by a failed main contractor is at risk of being lost, which is why the government plans to abolish cash retentions. Its late payment consultation response proposed banning the deduction and withholding of retentions to "prevent loss through insolvency and late and non-payment", weighing an outright ban against requiring retentions to be protected in a segregated account or by insurance or a surety bond. The change would amend Part 2 of the Construction Act.
The Commercial Payments Bill was introduced in the House of Lords on 19 May 2026 with a retention ban, a 60-day cap on large firms' payment terms and mandatory late payment interest at 8% above base rate. Parliament's record shows it completed its Lords third reading on 20 October 2026 and had its Commons first reading on 21 October 2026. Until it is in force, existing retention terms apply, so parties negotiating now should plan how defects security will work without cash retention.
Collateral warranties and step-in rights
A collateral warranty gives a funder, purchaser or tenant direct rights against a contractor, subcontractor or consultant, and may include step-in rights to take over a contract instead of letting it end. RICS gives the classic example: if a developer becomes insolvent, a funder with step-in rights can assume its role, pay the contractor and consultants and complete the project.
Where key subcontractors gave warranties, the beneficiary may step into the subcontract if the main contractor fails, keeping a critical package on site. RICS stresses checking that step-in rights are enforceable and that professional indemnity insurance is being maintained. Banking and finance advisers usually review these rights before a lender rescues a funded scheme.
Subcontractors and suppliers: the other side of the failure
When a main contractor fails, subcontractors and suppliers are usually unsecured creditors, and their options are narrower than many expect. Section 233B of the Insolvency Act 1986, inserted with effect from 26 June 2020, provides that when a company enters a relevant procedure, including administration, a voluntary arrangement or liquidation, a supplier's right to terminate "or to do any other thing" because of that insolvency ceases to have effect. The supplier cannot make payment of pre-insolvency charges a condition of continuing, and can terminate only with the office-holder's or company's consent, or the court's permission on hardship grounds. The rule protects the insolvent customer, so it does not stop an employer terminating because its own builder is insolvent.
Section 113 of the Construction Act makes "pay when paid" clauses ineffective, except where the party up the chain is insolvent, so a subcontract can lawfully make payment conditional on the main contractor being paid if the employer above it fails.
Direct payment by the employer is possible by agreement; RICS lists it as a pre-insolvency option. Once a formal process starts, take insolvency and restructuring advice first; assignment, novation or warranty step-in is usually a cleaner route.
Completing the works and the final account
The employer's real loss is measured in the final account. RICS calls the first stage a "notional final account", building the cost to complete onto the cost at insolvency, and notes the difference is generally a debt because a new contractor costs more. Its worked example involves a concrete subcontractor.
| Item | RICS example |
|---|---|
| Value of works had the original party completed | £825,000 |
| Net paid at the date of insolvency | £454,000 |
| Total revised cost after completion by others | £1,013,500 |
| Retention already deducted | £22,700 |
| Debt owed by the insolvent party | £188,500 |
Because the debt far exceeded the retention, the options were a bond claim and, for any balance, registering as a creditor. RICS also warns that an overvalued interim payment made shortly before insolvency may be unrecoverable, and that the completion final account should include every head of loss the contract allows and be properly evidenced, since the surety and insolvency practitioner will test it.
New homes: what happens if a house builder goes bust
A buyer of a new home is not the employer under the building contract, so protection usually comes from the home warranty. According to NHBC, its Buildmark policy provides cover for builder insolvency before completion, for the first owner only, typically 10% of the original purchase price up to £100,000, followed by a two-year builder warranty period and an eight-year insurance policy for physical damage caused by failure to build to NHBC requirements. Buyers should check their own policy documents.
Homeowners who hire a builder directly for an extension or renovation are the employer, so the same questions apply on a smaller scale: paying only for completed work and keeping records of materials paid for limits the loss. On larger schemes, real estate and property advisers coordinate warranty, funder and purchaser positions.
Claims, adjudication and getting money back
Recovery from the builder itself is usually limited to a dividend as an unsecured creditor, so most money comes back through security. A claim against the builder is made by proof of debt to the office-holder.
Final account disputes can still move quickly. The UK Supreme Court held in Bresco Electrical Services v Michael J Lonsdale in 2020 that a company in liquidation can adjudicate, with the court able to refuse or stay enforcement where there is a real risk the paying party would not get its money back; our construction adjudication guide explains how this works. Larger claims are heard in the Technology and Construction Court, which since 1 October 2026 sits in the High Court's new Business and Property Division.
Suing an insolvent builder is rarely worthwhile: in administration a moratorium means proceedings need the administrator's consent or the court's permission, and a judgment adds little. Pursuing a surety, guarantor, warrantor or insurer usually is. Dispute resolution specialists can assess those claims.
Projects outside the UK
On cross-border projects, the answers depend on the governing law of the contract, bond and warranties, and the insolvency law where the builder is based. The Construction Act already reaches abroad: section 113 treats a company as insolvent on events corresponding to UK insolvency events under the law of a country outside the United Kingdom.
Check whether local law restricts termination clauses as section 233B does, whether an on-demand bond can be called without proving loss, and whether a foreign office-holder needs recognition, as our report on Malaysia's cross-border insolvency regime explains. Projects advisers in jurisdictions such as Ireland or Dubai can confirm local rules.
When to bring in a construction or insolvency adviser
Most employers need specialist advice within days, because early decisions on termination, site security and bond calls are hard to undo. Warning signs often appear earlier: RICS recommends checks at Companies House and credit reference agencies, which may reveal county court judgments or changes of directors, and detailed record-keeping once a contractor shows distress. Advice is most valuable:
- Before signing, on bond wording, warranties with step-in rights and insolvency clauses.
- At the first sign of distress, on relaxing payment terms, re-letting work or direct payment.
- On appointment of an office-holder, on termination or novation.
- When calling security or in a dispute, on notices, evidence and adjudication.
Corporate INTL's Find an Expert directory lists construction advisers and insolvency advisers in England, while employment advisers can deal with staff questions.
What happens if your builder goes bust: key takeaways
What happens if your builder goes bust depends less on the builder than on the paperwork signed at the start. The contract decides whether payments stop and completion costs become a debt; the bond, guarantee, retention and warranties decide how much is recovered; and the procedure decides whether a rescue or novation is possible. With construction still the sector most exposed to insolvency and a retention ban before Parliament, review your security now, while every party is solvent.
Frequently asked questions
What happens if your builder goes bust halfway through a project?
Work usually stops and, under JCT forms, the builder's obligation to carry out the works and the employer's payment obligations are suspended. The employer can terminate, secure the site and appoint a replacement, recovering the extra cost from any bond, guarantee or retention and claiming any balance as an unsecured creditor.
Can I terminate a JCT contract if the contractor becomes insolvent?
Yes, the JCT forms allow termination on insolvency, and the contractor's obligations are suspended in any event. Confirm that a defined insolvency event has occurred first, because a wrongful termination can be a repudiatory breach, and consider whether novation to a buyer of the business would serve the project better.
Does a performance bond cover contractor insolvency?
Usually, but not automatically. Most UK bonds are default bonds, so the employer must prove the contractor's liability and its actual loss. Insolvency is not automatically a breach under most standard forms, so many employers ask for wording making insolvency an express event of default.
Is retention payment being banned in construction contracts?
It is proposed. The Commercial Payments Bill, introduced in the House of Lords on 19 May 2026, includes a ban on retention clauses in construction contracts. It passed its Lords third reading on 20 October 2026 and had its Commons first reading on 21 October 2026, so it is not yet law.
What are step-in rights in a collateral warranty?
Step-in rights let a warranty beneficiary, often a funder, take over a contract in place of a defaulting or insolvent party instead of letting it end. A funder can step into an insolvent developer's shoes, and a subcontractor warranty may let a beneficiary keep a key package going if the main contractor fails.
Can a subcontractor stop work if the main contractor goes into administration?
Not simply because of the insolvency. Section 233B of the Insolvency Act 1986 stops suppliers terminating, or doing any other thing, because a customer has entered administration or another relevant procedure, unless the office-holder consents or the court allows it on hardship grounds.
What happens if a house builder goes bust before completion?
A new home buyer relies on the home warranty. NHBC's Buildmark provides cover for builder insolvency before completion for the first owner, typically 10% of the original purchase price up to £100,000. Buyers should check their own policy documents and sale contract to confirm what applies.
How can employers protect themselves against contractor insolvency?
Check the contractor's finances before and during the project, avoid overvaluing interim payments, and secure a bond that treats insolvency as default, a parent company guarantee, warranties with step-in rights and a contract using the Construction Act's insolvency exception. Keep records that would support a final account at any time.
Sources
- Insolvency Service: Commentary, Company Insolvency Statistics September 2026 (released 20 October 2026)
- GOV.UK: ISG group of companies in administration, information for employees and creditors
- RICS: Termination of contract, corporate recovery and insolvency (practice information, reissued September 2025)
- Simmons & Simmons: JCT contracts and insolvency, should the contractor's employment be terminated?
- Housing Grants, Construction and Regeneration Act 1996, Part II (sections 111 and 113)
- Insolvency Act 1986, section 233B
- Cripps: Back to basics, performance bonds (January 2026)
- Department for Business and Trade: Late payment consultation, time to pay up (government response)
- GOV.UK: Largest crackdown on late payments in over 25 years as landmark Bill enters Parliament (19 May 2026)
- NHBC: Buildmark warranty and insurance cover
About this article
This analysis was researched and written by The Corporate INTL Newsroom, which covers cross-border legal, regulatory and business developments for lawyers, professional advisers and financiers in over 150 jurisdictions. It has been checked against official insolvency statistics, the Construction Act and the Insolvency Act 1986, government announcements on the Commercial Payments Bill, RICS practice information and published professional guidance. It focuses on England and Wales; other jurisdictions differ, and the terms of each contract, bond and warranty decide any specific case. This article is general information, not legal advice; for advice on a specific matter, consult a qualified adviser. Last reviewed 29 October 2026. For more analysis like this, visit the Corporate INTL newsroom or subscribe to Corporate INTL.
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