Invoice finance for construction businesses works differently than it does for almost any other sector, mostly because construction invoices aren't really invoices — they're payment applications, tied to certified valuations, retentions and contracts that can run 12 months or longer. This guide breaks down what actually matters when you're comparing invoice finance for construction in 2026, and where a different type of funding might get cash into your account faster.
TL;DR
Construction firms sit on more unpaid work than almost any other trade. A subcontractor might complete £80,000 of work on site this month and not see a penny of it for 60, 90, sometimes 120 days, because payment is tied to a certified valuation, not a delivered invoice. Standard invoice finance was built for businesses that raise a clean invoice on delivery — it wasn't built for retentions, applications for payment, or main contractors who dispute valuations to slow the clock.
Get the wrong facility and you'll find the advance rate drops the moment retention money enters the picture, or the lender refuses to fund anything until a final account is agreed. Get the right one and you can turn certified work into cash within 48 hours, which changes what you can bid for. Lovey compares business finance options from more than 50 lenders, so you're not stuck taking whatever your bank offers.
This is written for subcontractors, main contractors and specialist trades — groundworkers, M&E firms, fit-out contractors — turning over roughly £250,000 to £10m a year, who are waiting 30-120 days to get paid on certified work and want that cash sooner. If you invoice on delivery with no retention and get paid in 14 days, standard invoice finance already works fine for you and this guide won't tell you much new.
Most construction contracts hold back 5-10% of the contract value as retention, released at practical completion and again at the end of the defects period. Some invoice finance lenders exclude retained amounts from the advance entirely, which quietly shrinks your funding by that same 5-10% on every invoice. Ask this before anything else — it's the single biggest gap between what a facility promises and what it actually pays out.
Standard invoice discounting wants your whole sales ledger, every client, every invoice. Construction firms often work three or four contracts at a time with wildly different payment terms, so whole-ledger funding can mean funding invoices you didn't need help with while your one slow-paying contractor drags the average down. Selective invoice finance lets you pick individual applications for payment to fund — pay for what you use.
A JCT or NEC contract runs on certified valuations, not invoices in the traditional sense. A lender that only understands "invoice raised, invoice paid" will struggle with a payment application that gets partially certified, disputed, then re-certified a month later. Ask how the facility funds against an uncertified application versus a certified one — the answer tells you how much construction experience the lender actually has.
Main contractors don't love finding out a subcontractor is using invoice finance — it can (unfairly) read as a cash flow problem. A confidential facility lets you draw funding without your client ever knowing a lender is involved. A disclosed facility means the lender's name appears on your invoices and may even chase payment directly, which some subcontractors are fine with and others actively want to avoid.
If 60% of your turnover comes from one main contractor, some lenders will cap how much of your ledger they'll fund against that single client, regardless of how reliable they are. Construction firms concentrated around one or two big contracts hit this limit constantly — it's worth checking before you apply, not after you're declined.
A facility that takes six weeks to set up doesn't help you fund next Friday's wage bill. Ask for a realistic timeline from first conversation to first drawdown, and get it in writing rather than taking "usually quick" at face value.
Selective invoice finance — the flexible pick. You choose which applications for payment to fund rather than committing your whole ledger, with advance rates typically running 80-90% of certified value. It suits firms working two or three contracts at once where payment terms and reliability differ wildly between clients. Verdict: Buy if your cash flow problem is a handful of slow-paying contracts, not your whole book.
Full invoice discounting — the volume play. This funds your entire ledger on a confidential basis and usually needs turnover above roughly £250,000 to make sense for the lender. It's efficient once it's running but less forgiving of the payment application quirks unique to construction contracts. Verdict: Consider if you've got an established, diversified client base and steady turnover.
Disclosed construction factoring — the safety net. The lender takes on credit control and chases payment directly, which matters if you don't have someone in-house doing that job already. It costs more than a confidential facility because you're paying for the collections work, not just the cash advance. Verdict: Consider if chasing payment applications is eating time you'd rather spend on site.
A working capital loan — the plan B. Invoice finance facilities for construction can take two to six weeks to set up properly given the retention and contract checks involved. A working capital loan to bridge cash flow gaps gets money into your account in days while that facility is being arranged, or covers you entirely if your ledger is too thin for a lender to bother with. Verdict: Buy as a short-term bridge, not a long-term substitute.
Supply chain finance — the main contractor's tool. This lets a large contractor extend its own payment terms while paying subcontractors early through a funder, and it's usually set up and controlled by the payer, not the subcontractor. If you're the one being paid, the terms are dictated by someone else. Verdict: Skip if you're a subcontractor looking for a facility you control.
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Selective invoice finance
Full invoice discounting
Disclosed factoring
Working capital loan
Supply chain finance
If you want a rate comparison across other short-term products before deciding, compare merchant cash advance rates alongside invoice finance quotes to see which actually costs less over the life of a contract.
What is invoice finance for construction businesses?
It's a facility that advances cash against certified applications for payment or invoices before your client actually pays, usually 80-90% upfront with the balance (minus fees) on collection. Construction versions need to account for retentions and certified valuations, which standard invoice finance doesn't always handle well.
How does invoice finance handle retentions?
Most lenders exclude the retained percentage (typically 5-10%) from the advance until it's released at practical completion or the end of the defects period. Ask this upfront — some construction-specialist lenders will fund a portion of retention too, but it's not standard.
Is invoice finance better than a bank overdraft for contractors?
Invoice finance scales with your turnover, so the more you invoice, the more funding you can draw, unlike a fixed overdraft limit. A bank overdraft is usually cheaper for small, occasional gaps but doesn't grow with a busy contract season.
How much does invoice finance cost for construction firms in 2026?
Costs are usually made up of a discount fee (a percentage per month on funds drawn) plus a service fee if the lender handles collections. Rates vary by lender and risk profile, so get more than one quote before committing.
Can subcontractors use invoice finance?
Yes, subcontractors are common users of invoice finance, particularly selective facilities that fund individual applications for payment rather than a whole ledger. Confidential facilities are popular here since main contractors don't need to know a lender is involved.
What's the difference between factoring and invoice discounting?
Factoring is disclosed and the lender usually chases payment directly, while invoice discounting is confidential and you keep control of collections. Factoring costs more but takes admin off your plate; discounting is cheaper if you already have credit control in place.
How fast can a construction business get invoice finance?
Once approved, drawdown is typically 24-48 hours, but setting up the facility itself can take two to six weeks given the retention and contract checks involved. A short-term working capital loan can bridge that setup period if you need cash sooner.
Is a merchant cash advance a good alternative to invoice finance?
A merchant cash advance works off card takings rather than invoices, so it doesn't suit most construction firms unless they run a retail or trade counter alongside the main business. For pure contract-based cash flow gaps, a working capital loan or invoice finance facility is the better fit.
The detail most contractors miss isn't the advance rate — it's whether the lender actually understands the difference between an invoice and a certified valuation. A facility built for retail or services invoicing will stumble the first time a payment application gets partially certified and disputed, which happens on a normal basis in construction, not as an exception. Ask a lender directly how they fund an uncertified application before you sign anything, and use their answer as the real test of whether they've done this before.
