UK construction takes longer to get paid than any other sector in the economy
The average Days Sales Outstanding in UK construction is 83 days, the longest of any sector in the UK (ONS / Creditsafe). In practice, that means a general contractor finishing a project in January may not see full payment until April. Their subcontractors, already carrying the cost of materials and labour, wait even longer.
This is not a new problem. But it has become a structural one, and the numbers are getting harder to ignore.
The numbers behind the 83-day problem
77% of UK subcontract projects experience late payment (Aston University, Journal of Legal Affairs, 2022). That is not an outlier stat, it is the norm. For the firms on the receiving end, late payment is a cash flow event that forces them to borrow, delay their own suppliers, or absorb the cost silently.
The aggregate cost is significant. £10.7bn is lost annually to payment delays across UK businesses (UK Government DBT, 2025). In construction specifically, unpaid invoices owed to UK construction businesses exceed £30bn (Sharpe Pritchard, 2024). The sector recorded 4,032 insolvencies in 2024, the highest of any UK sector (Hill Dickinson, 2025).
Globally, $280bn was lost to construction payment delays in 2024 (Rabbet, 2024). The UK sits at the sharp end of an international pattern.
Why construction payments take so long
The payment chain is too long
Most construction projects involve a client, a main contractor, and multiple layers of subcontractors. Payment moves down that chain one tier at a time. The client pays the GC. The GC pays the first-tier sub. The first-tier sub pays their sub. Each link adds delay.
By the time payment reaches the trade subcontractor who poured the concrete or fixed the cabling, weeks or months have passed since the work was completed.
Invoice management runs on the wrong tools
The GCs we work with are managing invoice approvals across WhatsApp and email. That introduces human error, inconsistent invoice formats across 20 to 40 subcontractors on a single project, and an admin burden that compounds with every project running in parallel.
When there is no central place for subcontractors to log completed work and generate invoices automatically, submissions come in last minute. The GC is then left trying to reconcile, verify, and settle multiple invoices under time pressure, while manually calculating CIS deductions for each sub. Petl Pay's internal research puts this at 16 hours per month for the average SME general contractor, and that figure is consistent with what we hear directly from GCs in the field.
CIS adds compliance complexity
The Construction Industry Scheme requires contractors to deduct tax from subcontractor payments before settlement. The rates vary, 20% for registered subs, 30% for unregistered, 0% for those with gross payment status, and verifying each subcontractor's status with HMRC before every payment adds another manual step to an already fragmented process.
When invoice management runs on WhatsApp threads and email chains, CIS compliance becomes reactive rather than systematic.
Dispute resolution slows everything down
The Construction Act gives subcontractors rights around payment notices and pay less notices. When those timelines are missed, which they often are, disputes arise. Disputed invoices sit unpaid while both parties negotiate, further extending the DSO.
95% of general contractors and 75% of subcontractors report frequently floating payments to cover gaps caused by late payment from above (NetSuite / Rabbet). The whole chain is credit-funding the chain above it.
What this costs subcontractors specifically
The DSO figure measures how long contractors wait to get paid. What it does not capture is what subcontractors do in the meantime. Materials purchased out of pocket. Wages paid before payment lands. Overdraft facilities drawn down on jobs that have already been completed and signed off.
For the SME subcontractor operating on thin margins, 83 days is not an inconvenience. It is a recurring cash flow crisis that limits growth, forces borrowing, and in too many cases, leads to insolvency before the invoice is ever settled.
What fixing it actually requires
The 83-day problem has three root causes that need to be addressed together: fragmented invoice management, manual payment processes, and the absence of a purpose-built payment layer for project-based work.
Addressing the first two without the third does not solve the problem. Faster invoice submission still results in slow payment if settlement runs through manual bank transfers and approval chains. What the industry needs is a payment layer that sits inside the project workflow, from work logged to invoice generated to payment settled automatically.
That is what Petl Pay is built for. One client payment in, every subcontractor paid out, with CIS deductions handled and an audit trail maintained throughout. The goal is not just faster payment, it is removing the manual steps that create delay in the first place. Learn more at petlpay.com.
Frequently Asked Questions
Why does UK construction have such long payment delays?
UK construction has a long payment chain from client to main contractor to multiple subcontractor tiers. Combined with manual invoice management, CIS compliance requirements, and a dispute-heavy payment culture, the average Days Sales Outstanding reaches 83 days, the longest of any UK sector (ONS / Creditsafe).
What is the average DSO in UK construction?
83 days, according to ONS and Creditsafe data. This is the longest average Days Sales Outstanding of any sector in the UK economy, and significantly above the cross-sector average.
How much does late payment cost UK construction?
Unpaid invoices owed to UK construction businesses exceed £30bn (Sharpe Pritchard, 2024). The broader cost of late payments to UK businesses is £10.7bn annually (DBT, 2025). UK construction recorded 4,032 insolvencies in 2024, the highest of any sector (Hill Dickinson, 2025).
What rights do subcontractors have when payment is late?
The Construction Act gives subcontractors rights around payment notices and pay less notices. If a contractor misses the notice deadlines, the full notified sum becomes due. Subcontractors also have the right to suspend work for non-payment after giving seven days notice.
How can general contractors reduce their DSO?
The most effective interventions are structural: moving invoice management off WhatsApp and email into a centralised platform, automating CIS deductions, and embedding payment directly into the project workflow so settlement follows invoice approval automatically rather than being a separate manual process.
