Insolvency and Business Rescue for the Construction Sector

Construction is a high-turnover, low-margin business, and much of what puts a contractor under is decided by other people. Payment comes late and in stages, retentions are held back for months or years, and the price is often fixed long before the true cost of materials and labour is known.

That makes the sector deceptive. A firm can have a full order book and healthy turnover and still run out of cash, because the money is tied up in work already done but not yet certified, in retentions held by clients, and in materials bought before the next valuation is paid.

Contractors often keep going by leaning on the next payment, stretching subcontractors and suppliers, or funding the gap on the overdraft, none of which fixes a contract that was priced too thin or a client that will not pay on time.

The important question is not how much work you have on. It is whether the business can pay its debts as they fall due, and whether each contract is still profitable once today’s material, labour and finance costs are counted.

This guide explains the warning signs of insolvency in a construction business, the options open to directors, and what may happen to retentions, plant on finance, subcontractor claims and any debts you have personally guaranteed.

Insolvency in the Construction Sector

The headline that matters is the persistence. Construction has sat at the top of the insolvency tables for years, and the volume climbed after 2021 rather than easing back, from around 2,500 failures a year before 2020 to a peak of 4,389 in 2023 and 3,949 across 2025.

The raw count also understates the strain. There are roughly 385,000 construction businesses in the UK, so this is one of the biggest parts of the economy as well as the most failure-prone, and the official figures only capture formal insolvencies. The firms that quietly hand back the keys, stop trading or dissolve without a procedure never appear in them.

Nor is the risk shared evenly. Across 2025 the specialist trades classified under SIC 43, the electricians, groundworkers, plasterers and finishers, recorded 2,218 insolvencies, against 1,537 for building firms (SIC 41) and 194 for civil engineering (SIC 42). Some of that gap is simply that there are more of them.

The rest is position: specialist subcontractors sit at the bottom of the payment chain, so they are the ones left holding the loss when something breaks higher up.

What’s Driving Construction Insolvencies

Ask a construction director why the company failed and the honest answer is usually cash, not the order book. Plenty of firms go under with work still coming in, because the way the industry pays lets a profitable-looking business run dry.

Weak demand, disputes, loss-making jobs and over-borrowing all contribute, but the pressures below are the ones that make construction its own case. In the cases we handle it is nearly always one of these three that turned a full order book into an empty account.

Fixed-price contracts against rising costs

Most construction is sold as a lump sum, priced months or even years before the work happens. That is fine until costs move, and then the contractor eats the difference with nowhere to pass it on.

The BCIS Materials Cost Index hit 26% annual inflation in June 2022, and construction cost inflation has stayed above general CPI since. Firms that had locked in fixed prices in 2020 and 2021 found themselves building at rates that no longer covered the materials.

On the margins main contractors work to, often under 2%, that gap is fatal, and it sat behind both the ISG and Buckingham Group failures.

The same maths punishes loss-making contracts and underpriced variations. A job that loses money burns more cash the more of it you build, so a busy year can empty a company faster than a slow one, especially when the variations and the final account are disputed and sitting uncertified.

Retentions and the payment chain

Then there is retention. The client keeps back 3 to 5% of each payment, releasing half at practical completion and the rest a year or more later at the end of the defects period. On a lot of jobs that retained slice is the whole profit, earned and invoiced but sitting in someone else’s account for eighteen months.

Older industry estimates put around £4.5 billion locked up in retentions across the UK at any one time, with a large share of firms reporting money they never got back after a contractor above them failed. Late payment does the rest.

A subcontractor can be run entirely competently and still be starved of cash by clients who are perfectly solvent but slow, or who use a pay-less notice to cut a valuation at the last minute.

The VAT reverse charge cash squeeze

The quietest pressure is a tax change most people outside the trade have never heard of. Since 1 March 2021 the VAT domestic reverse charge has meant the main contractor accounts for the VAT, not the subcontractor. The subcontractor simply never handles that 20% any more.

For any firm that had been leaning on the VAT it held between returns as informal working capital, and many were, the cushion disappeared overnight. It is a change we still see catching firms out years on. Plenty also became repayment traders, still paying VAT on materials but collecting none on sales, which leaves them chasing HMRC refunds to stay liquid.

Every day HMRC takes over a refund is a day out of the bank balance.

Sitting under all of it is labour. The FMB and CIOB State of Trade survey for the second half of 2025 found around 72% of small builders struggling to find skilled trades, carpenters and bricklayers worst of all, and most of them raising wages to keep the people they have. Delay and pay rises both come straight out of the margin the fixed price had already thinned.

Warning Signs a Construction Business Is Insolvent

Construction failures almost never come out of nowhere. The cash strain shows well before anything formal, usually in the same handful of ways. These are the ones we see again and again.

• Funding old jobs with new deposits. Paying last month’s suppliers and subcontractors out of the mobilisation money for next month’s project. It holds together until the new work slows, and then the whole thing goes at once.
• Falling behind with HMRC. Skipping a VAT payment, or keeping CIS deductions and PAYE back instead of handing them over. Using HMRC as an overdraft is about the clearest tell there is.
• Stretching supplier terms. Quietly moving from 30 days to 60 and beyond, and merchants responding by putting you on pro-forma or cash on delivery.
• Retentions and final accounts written off. A run of disputed final accounts or adjudications, or writing off retentions lost to a collapse above you, taking the balance-sheet equity with them.
• One client carrying the business. When a single main contractor is most of your turnover, it is their financial health, not yours, that decides whether you survive.

None of these, on its own, proves the company is insolvent. A firm can be stretching terms or fighting a final account and still able to pay its debts as they fall due. But when several are true at once, it is the moment to build a 13-week cash-flow forecast and ask the honest question of whether the money will be there when it is needed.

As insolvent liquidation starts to look more likely than not, a director’s decisions have to give more weight to creditors, and getting advice at that point, rather than three months later, is usually what changes how the story ends. The builders who come to us early keep options the ones who wait have already lost, and there is no shame in making the call before the position is beyond saving.

When a Main Contractor Fails: The Subcontractor Cascade

The risk that defines construction is the one you cannot control: you can be solvent, well run and fully booked, and still be taken down by a failure above you. When a main contractor collapses, the unpaid invoices and lost retentions roll straight downhill. It is the sector’s signature way of going under, and it is worth understanding before it lands on you rather than after.

What happens to your money when a contractor collapses

When ISG went into administration in September 2024, the biggest UK construction failure since Carillion, the administrators reported liabilities running into the billions, with hundreds of millions owed to the trade suppliers who had done the work.

A year earlier Buckingham Group had gone the same way, owing a reported £302 million, well over £100 million of it to trade contractors, with nothing expected back for unsecured creditors.

Those numbers moved as the administrators worked through the claims, and it pays to read what each one means, because total liabilities, unsecured claims and trade debt are three different figures. But for subcontractors the pattern was identical both times: retentions and unpaid valuations gone, and in several cases the subcontractor following the contractor into administration.

We act for firms caught in exactly this, and the cruel part is almost always the money already earned. Unless the retention was genuinely ring-fenced in a project bank account or an express trust, it drops into the failed contractor’s estate and you join the unsecured queue near the back.

A project bank account protects the payments held under its trust, but it does not automatically cover retention. Whether it does comes down to the wording of the contract you signed.

Bonds, step-in and recovering what you’re owed

It is worth pulling apart three things that get talked about as if they all protect you, because most of them protect someone else.

A performance bond, usually about 10% of the contract value, protects the employer: they can call on it to pay for a replacement if the contractor above you fails. Step-in rights in a collateral warranty protect the employer or the funder: they keep a project alive by taking subcontractors on directly through novation.

Neither, by itself, gets a subcontractor paid for a valuation or a retention that is already outstanding.

Your own routes are narrower, and worth knowing anyway: registering a claim in the insolvency, and adjudication. Since the 2020 Supreme Court decision in Bresco v Lonsdale, a company in liquidation can still adjudicate for money it is owed, which gives an insolvency practitioner a genuine tool to chase unpaid construction accounts on behalf of creditors.

What any of it is worth to you depends on the contract, which is the real reason the paperwork matters before a job turns bad and not after.

Your Options if a Construction Company Can’t Pay

The worst thing to do with an insolvent construction company is keep trading and hope the next valuation rescues it. Once there is no reasonable prospect of avoiding insolvent liquidation, carrying on in a way that leaves creditors worse off can expose a director to a wrongful trading claim.

That claim turns on what you knew or ought to have worked out, and on what you did about it, so acting early and on advice is part of the defence, not a sign of giving up.

In our experience the move that helps is getting the position assessed by a licensed insolvency practitioner while the options are still open. Which one fits comes down to whether there is a viable business underneath the cash problem.

• Time to Pay arrangement. If the business itself works and the problem is a defined HMRC arrears, VAT, PAYE or CIS, a Time to Pay arrangement spreads the tax over a manageable stretch and keeps the company trading.
• Company Voluntary Arrangement. A CVA lets a viable company pay creditors an agreed share over time while it keeps working, which can protect live contracts and the people delivering them.
• Administration. Administration buys breathing space from creditors and can be used to rescue the business, finish or novate live contracts, or simply get creditors a better result than an immediate closure.
• Creditors’ Voluntary Liquidation. Where the company cannot be saved, a CVL closes it properly and deals with creditors including HMRC. It draws a line under the company’s debts, though not under any personal guarantees you have given.

Two things trip construction directors up here more than anything else. Personal guarantees to merchants and lenders are routine in the trade, and they outlast the company and can reach your own home, so it is worth pulling out and reading everything you have signed, and telling us about each one, before you pick a route.

And live contracts, bonds and retentions all have to be handled inside whatever process you choose, which is why closing a construction company is rarely as simple as closing the doors.

Frequently Asked Questions About Construction Insolvency

Related Guides: Construction and Insolvency

• Creditors’ Voluntary Liquidation: the standard route to close an insolvent company.
• Company Administration: rescue, breathing space and handling live contracts.
• Company Voluntary Arrangements: repaying creditors while continuing to trade.
• HMRC Time to Pay Arrangements: spreading VAT, PAYE and CIS arrears.
• Are Directors Personally Liable for Company Debts?: where company debt becomes personal.
• Can’t Afford to Pay Suppliers: dealing with merchant and subcontractor pressure.