Invoice Finance for Construction - Business Expert
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Invoice Finance for Construction

Independent guides and comparisons across business loans, invoice finance, asset finance, commercial mortgages, and more.

Mike Smith
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Mike Smith
Updated on 30 April 2026
Independently assessed Rates verified 30 April 2026
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Construction businesses face one of the longest working capital cycles of any sector. Materials are purchased upfront, labour is paid weekly, subcontractors require prompt settlement — yet payment from main contractors or clients can take 60, 90, or even 120 days. Retentions held by the client for six to twelve months add another layer of deferred cash.

Invoice finance addresses part of this problem: it accelerates payment on eligible invoices, turning a 60-day wait into a 24-hour advance. But construction businesses need to understand the specific constraints lenders apply to the sector before assuming a standard facility will work for them.

The Construction Working Capital Problem

A typical construction business has cash going out in three waves:

  1. Materials: ordered and paid for before work begins or during the project
  2. Labour and subcontractors: paid weekly or upon completion of each trade
  3. Plant and equipment hire: invoiced regularly throughout the project

Cash comes back in one of two ways:
– Applications for payment: submitted at agreed intervals (monthly, or at project milestones), certified by the main contractor, then paid 30–60 days after certification
– Final account settlement: once practical completion is achieved — potentially months after the bulk of costs have been incurred

The gap between outgoings and incomings is structural. For a subcontractor on a six-month commercial fit-out, cash can be tied up for the duration of the project plus the retention period.

What Invoice Finance Can and Cannot Do in Construction

What it can do:
– Advance cash against certified applications for payment, reducing the wait from 60 days to 24–48 hours
– Provide a revolving facility that grows in line with the construction programme
– Finance across multiple projects simultaneously

What it cannot do:
– Finance uncertified applications — lenders advance against invoices or certified applications, not estimates or applications awaiting sign-off
– Release retentions early (retentions are typically not eligible for advance until due for release)
– Solve the pre-construction cost gap (materials purchased before any invoice is raised)

Why Construction Invoice Finance Is More Complex

The Application for Payment structure
In construction, the billing mechanism is often an Application for Payment (AfP) rather than a conventional invoice. The AfP is submitted by the subcontractor or main contractor, then certified (approved) by the certifier. The certified amount may differ from the amount applied for.

Lenders advance against the certified value, not the applied value. If a £200,000 application is certified at £160,000, the advance is based on £160,000. Delays in certification create delays in funding.

Debtor concentration
Subcontractors often work predominantly for one or two main contractors. Lenders typically apply concentration limits — if a single debtor represents more than 25–40% of the ledger, the advance rate may be capped or the facility restricted. For businesses reliant on a single main contractor, this creates a structural limit on the facility size.

Contra liabilities and set-off
Main contractors may have the right to set off amounts owed by the subcontractor against amounts due on the invoice — defects, delays, or disputed variations. This set-off risk is factored into the lender’s advance rate and eligibility criteria.

CIS (Construction Industry Scheme)
Payments made under CIS are subject to deductions at source — currently 20% for registered subcontractors or 30% for unregistered. The net payment the subcontractor receives differs from the invoice amount. Lenders who understand construction finance account for CIS deductions in their advance calculations; those who do not may create cash flow complications.

Sector-Specialist vs Generalist Lenders

Not all invoice finance providers will lend to construction businesses. Generalist lenders may decline due to the complexities above — AfP structures, retentions, concentration, set-off risk, CIS.

Construction-specialist lenders price and structure their facilities to accommodate these factors. They are more likely to:

  • Accept applications for payment as the advance basis
  • Understand retention and programme timing
  • Apply appropriate concentration limits without blanket restriction
  • Handle CIS correctly in their advance calculations

Working with a generalist lender that does not understand the sector creates operational problems that can be worse than having no facility.

What Construction Invoice Finance Costs

Costs mirror standard invoice factoring and discounting pricing:

  • Discount rate: applied to the outstanding advance — typically 1.5–3% over base rate. [VERIFY — HUMAN CONFIRMATION NEEDED]
  • Service charge: 0.5–2% of turnover. [VERIFY — HUMAN CONFIRMATION NEEDED]

Specialist lenders may price more tightly because they understand the risk model. Generalist lenders may price more conservatively or add conditions that effectively reduce the usable facility.

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