Late payments are back in the spotlight in the UK.
The Government has introduced the Commercial Payments Bill, which proposes tighter payment terms, stronger enforcement and changes intended to address poor payment practices. The proposals also include measures affecting retention payments in construction.
For contractors, that is welcome attention. Late payment has a direct impact on cash flow, subcontractor payments and the ability to keep projects moving. Yet there is another part of the payment cycle worth examining.
How long does it take to get the invoice out in the first place?
A contractor may complete work in the first week of the month, but the payment process can already be delayed before the client has received anything. Site records may still need checking. Variations may be awaiting approval. Retention needs calculating. Finance may be waiting for the final certified amount.
By the time the invoice is issued, valuable days or even weeks may already have been lost.
This is where contractor invoicing software can play a role. It cannot force a client to pay on time, but it can help contractors reduce avoidable delays within their own billing process and get accurate invoices out sooner.
For construction businesses looking to tighten the link between contracts, variations, billing and finance, Xpedeon brings these workflows together in one construction-specific ERP platform.
The UK's Late Payment Crackdown Puts Construction Cash Flow Back in Focus
The proposed Commercial Payments Bill is part of a wider effort to tackle poor payment practices across UK businesses. Among the proposals are limits on payment terms, stronger enforcement powers and mandatory interest on qualifying late payments. The Government has also proposed changes to how retention payments are handled in construction.
The legislation is still progressing, so the measures should not be treated as rules already in force. Even so, the Bill has brought an important issue back into focus.
When does a payment delay actually begin?
The obvious answer is when the agreed payment date passes, and the reality is usually messier.
On many projects, the delay starts much earlier. Work is completed, but the information required to prepare the application or invoice is scattered across site teams, commercial records and finance systems. Someone has to pull it together before the payment process can even begin.
A client could pay within the agreed terms and the contractor could still wait far longer than necessary for the cash. That distinction is important.
The Payment Clock Does Not Start Until the Invoice Goes Out
Consider a specialist contractor that completes a package of work at the beginning of the month. The site team confirms that the work is complete. The quantity surveyor still needs to review the quantities. A variation agreed during the previous month has not yet been formally updated. Retention needs to be applied and finance is waiting for the certified amount before raising the invoice. The process may look something like this:
Work completed → Progress or valuation captured → Variations checked → Amount certified → Invoice issued → Payment terms begin
Each stage may be perfectly reasonable. The problem comes when information moves slowly between them. Many contractors focus on the final part of the process: how long the client takes to pay. But, there is another question worth asking first:
How many days are being lost before the invoice reaches the client?
That is often harder to see because the delay is spread across different teams. Site teams may believe the work is complete. Commercial teams may still be resolving its value. Finance may have no reason to raise an invoice until the information is confirmed.
By then, people are already working backwards to explain why the cash forecast has slipped.
Where Construction Invoicing Gets Held Up
Construction invoicing generally starts with several projects, and commercial decisions rather than finance alone. Few areas where construction invoicing gets held up:
Progress information arrives late
Finance cannot invoice work that has not been properly valued or confirmed.
On a busy project, site teams may complete work across several packages while commercial teams are still reconciling quantities, progress records and contractual entitlements. If that information reaches the billing process late, the invoice will be late too.
The issue is not necessarily that anyone has failed to do their job. The information may simply be moving through too many disconnected steps.
Variations are still being agreed
Variations can complicate an otherwise straightforward billing cycle.
A contractor may have completed additional work following an instruction or change on site, while the final commercial value is still being negotiated. That creates a difficult question for the billing team.
Should the work be included in the current application? Should it be held back? Is the approved value different from the original estimate?
If variation records are managed separately from the wider contract and billing process, these questions can create repeated delays.
Retention changes the amount that can be billed
Retention is another area where a small calculation issue can hold up the process.
The amount may depend on contract terms, work completed, previous applications and the stage of the project. With the UK's proposed reforms also putting retention practices under greater scrutiny, contractors need clear records of what has been withheld, what remains outstanding and when amounts become due.
Finance is waiting for the project team
Finance often inherits the problem rather than creates it.
The accounts team may be ready to raise an invoice, but they still need the right project information. If the contract value has changed, a variation is pending or the billing amount has not been approved, finance is left waiting.
This is one reason why invoicing can become a month-end rush.
What Should Contractor Invoicing Software Actually Do?
Generating an invoice is only one part of the process. For a construction business, contractor invoicing software should help connect the information that determines what can be billed.
| Work completed | Progress and valuation information |
| Contract value | Current contractual position |
| Variations | Approved changes and revised values |
| Retention | Deductions and outstanding amounts |
| Approvals | Clear responsibility and audit trail |
| Invoice generation | Accurate billing based on approved data |
| Receivables | Visibility into what remains unpaid |
The value comes from reducing the amount of information that needs to be manually collected at the end of the process.
For example, if a variation has already been recorded and approved within the same system that holds the contract and financial information, the billing team does not need to reconstruct the commercial position from emails, spreadsheets and separate project records.
That can make a significant difference when several projects are moving through their billing cycles at the same time.
Faster Invoicing Will Not Stop Every Late Payment
It is important to be realistic here. No software can guarantee that a client will pay on time. Clients may dispute an amount. Their own approval processes may take longer than expected. Cash flow issues can affect their ability to pay.
Contractor invoicing software addresses a different part of the problem. It helps contractors look at the delays they can control. If completed work takes ten extra days to move from the project team to the invoice, those ten days are already part of the cash cycle. Reducing that internal delay gives the contractor a better chance of starting the payment process sooner.
That is particularly relevant when payment terms are already tight and project cash flow is under pressure.
Connecting the Commercial and Financial Side of Billing
The billing process works best when finance is not reconstructing the project position from scratch every month.
Commercial teams need visibility into contracts and changes. Project teams need to capture progress. Finance needs an accurate basis for invoicing and receivables.
When those workflows are disconnected, small gaps can turn into billing delays.
Xpedeon's construction-specific approach is built around connecting commercial, financial and operational processes. Its core platform includes accounts receivable and financial management, while broader capabilities support contracts, subcontract commitments and project financial control.
That matters in the context of invoicing because the invoice is usually the outcome of several earlier project and commercial activities. Contract values change. Variations are agreed. Retention applies. Work is valued. Approvals are completed.
Keeping those records connected gives finance a clearer starting point when it is time to bill.
Five Questions Contractors Should Ask About Their Billing Process
The current focus on late payment is also a good opportunity for contractors to look at their own internal processes.
1. How long passes between work completion and invoice issue?
Track the actual number of days. The answer may be longer than expected.
2. Where do variations hold up billing?
If changes are regularly agreed on site but take weeks to reach the commercial record, that gap needs attention.
3. How is retention calculated and tracked?
Teams should be able to see what has been deducted, what remains outstanding and how those amounts relate to the contract.
4. How often does finance have to chase project teams?
Repeated emails and manual follow-ups are usually a sign that the workflow depends too heavily on individual people moving information between systems.
5. Can the business see billing and receivables alongside the wider project position?
An unpaid invoice means something different on a project that is already under cost pressure than it does on one with a healthy cash position. Connected visibility helps teams understand the bigger picture.
Late Payment Reform Is Only One Part of the Solution
The UK's proposed reforms may put greater pressure on poor payment practices. That is an important development for contractors and suppliers.
Still, legislation cannot remove every delay from the construction payment cycle.
Some of those delays begin internally, long before a client has the opportunity to pay or miss a payment deadline.
Completed work needs to be valued. Variations need to be captured. Retention needs to be applied correctly. The commercial position needs to be clear enough for finance to raise an accurate invoice.
That is where contractor invoicing software can make a practical difference.
Xpedeon helps bring contract, commercial and financial workflows together, giving contractors a clearer view of the information behind the billing process. The aim is straightforward: reduce the manual gaps that slow down the journey from completed work to invoice and from invoice to better financial visibility.
If your team is spending valuable days each month chasing information before an invoice can even be issued, it may be worth looking at where the billing process is breaking down and whether your current systems are helping to move it forward.
See how Xpedeon connects contracts, project finances and billing workflows to give construction teams greater control over the information behind every invoice.