Invoice finance for engineering and fabrication firms

Engineering and fabrication is a cash-hungry trade. A structural steel contract, a batch of precision-machined parts or a bespoke plant build can tie up tens of thousands of pounds in steel, aluminium, castings, consumables, machine time and skilled labour for weeks or even months before a single invoice is raised. Then the customer, often a large OEM or a main contractor, pays 45 to 90 days after delivery. The result is familiar to anyone who runs a workshop: a full order book and an empty bank account.

Invoice finance is built for exactly this gap. It advances the bulk of an invoice value as soon as the job is delivered and billed, so the cash from work you have already completed funds the next job on the shop floor. This guide looks specifically at how it works for job-based, made-to-order engineering, where it fits alongside stock and asset finance, and what an engineering-aware lender looks at before saying yes.

Why job-based engineering strains cash flow

Volume manufacturing runs on repeatable output and predictable stock turns. Subcontract and made-to-order engineering does not. Each job is priced, materials are ordered in, and a large slug of value sits as work in progress on the bench or in the CNC cell while the invoice date is still weeks away. The longer and more complex the build, the deeper the hole before the money comes back.

• Materials are often bought upfront, sometimes on short supplier terms, while the customer pays on long ones.
• Skilled labour and machine hours are paid weekly or monthly, regardless of when the customer settles.
• One or two large contracts can dominate the order book, so a single late payer swings the whole month.
• Growth makes it worse, not better. A bigger order needs more cash committed before it earns anything.

How invoice finance releases the cash

Once a job is delivered and invoiced, the lender advances an agreed percentage of the invoice, typically around 80 to 90 per cent, within a day or so. You get working capital straight away instead of waiting out the payment term. When the customer pays, you receive the remaining balance less the lender's fee. The facility grows as your sales grow, which suits a workshop taking on larger contracts.

There are two common shapes. Factoring includes credit control, so the lender manages the sales ledger and collections, which frees up office time. Invoice discounting keeps collections in-house and can be confidential, so your customers need not know a facility is in place. For engineering firms with a handful of large trade accounts, either can work, and the right choice usually comes down to how much of the collections job you want to keep.

Work in progress is generally not fundable until invoiced

This is the point that catches out a lot of engineering firms. Invoice finance funds invoices, not effort. The half-built assembly on the shop floor, the steel already cut and the hours already booked are value to you, but until they turn into a raised, deliverable invoice there is nothing for the lender to advance against. That is the difference between invoice finance and the earlier-stage funding covered below.

The practical fix is billing structure. Where the contract allows, stage or interim invoicing lets you raise invoices at agreed milestones rather than only on final delivery. Bill on design sign-off, on materials delivered to site, on fabrication complete and on installation, and each of those invoices can be funded as it is raised. Interim billing turns one long unfunded build into a series of fundable stages, which pulls cash forward considerably.

The order book is not the problem. The gap between spending on a job and being paid for it is the problem, and that gap is exactly what invoice finance is designed to bridge.

A worked example

Take a fabrication firm awarded a £150,000 job to build and deliver a structural steel assembly. Materials and labour of, say, £95,000 are paid out over the eight weeks of the build. The firm delivers, the customer signs off, and the £150,000 invoice goes out on 60-day terms. Without a facility, the firm has funded £95,000 from its own pocket and must now wait another two months to be paid.

With invoice finance at an 85 per cent advance rate, the lender releases roughly £127,500 within a day of the invoice being raised. That immediately covers the money already spent and leaves working capital for the next contract. When the customer pays after 60 days, the firm receives the remaining £22,500 less the lender's fee. On a facility priced at, for example, around 2 per cent of invoice value for this sort of work, the cost on this single invoice would be in the region of £3,000, set against two months of cash freed up and the ability to take on the next job now rather than later.

Where stock and asset finance fit alongside it

Invoice finance does not cover the earlier stages, so it often sits beside other facilities rather than replacing them.

• Stock or trade finance can fund the raw materials, bar stock, plate and bought-in components before the job is complete, filling the gap that invoice finance cannot reach.
• Asset finance funds the machine tools themselves, the CNC centres, press brakes, laser cutters and welding plant, spreading the cost over their working life rather than draining working capital.

Used together, stock finance covers the build, asset finance covers the kit, and invoice finance releases the cash the moment the job is invoiced. The three are complementary, and a good facility is structured so they work with each other rather than overlapping.

Proof of delivery, sign-off and quality disputes

Because the lender advances against a genuine, collectable debt, it cares about how solid that debt is. For engineering work that means clean paperwork: a purchase order, proof of delivery, and where relevant a signed acceptance or inspection sign-off confirming the customer has taken the goods and accepts them. Firms that keep tidy records of delivery notes and sign-offs tend to get funded faster and with fewer queries.

Quality disputes matter here too. If a customer rejects a batch, claims an assembly is out of tolerance or withholds payment pending a remedy, the invoice is in dispute and the lender will usually pull its advance on that invoice until the matter is resolved. This is not a reason to avoid invoice finance, but it is a reason to keep quality records, inspection data and acceptance evidence in good order, because they protect both your payment and your funding.

Retention, customer concentration and export

Larger contracts often carry retention, where a percentage of the value is held back for a period after completion. Retention amounts are generally not funded in the same way as the main invoice, because they are not payable until the retention period ends. Some lenders will look at retention separately, so it is worth raising early if your contracts carry it.

Customer concentration is common in subcontract engineering, where much of the turnover can run through one or two main contractors or OEMs. A lender will look closely at this, because if most of the ledger sits with a single payer, that payer's health drives the whole facility. Concentration does not rule out funding, but it shapes the advance rate and the terms, and an engineering-aware lender will be more comfortable with the pattern than a generalist.

Export orders are increasingly part of the picture for precision and specialist engineering. Invoice finance can fund export invoices, though the lender will weigh the destination country, the currency and the payment method. Where cover is available it can also sit alongside credit insurance, which protects against a foreign customer failing to pay.

Why an engineering-aware lender prices the work better

A generalist lender often sees long payment terms, work in progress and a concentrated ledger and reads risk into all three. A lender that understands engineering reads the same picture differently. It knows that 60 to 90-day terms are normal for OEM and main-contractor work, that stage invoicing is a strength rather than a warning sign, and that a well-run subcontract shop with sign-off discipline is a sound proposition. That understanding tends to show up as a higher advance rate, more sensible fees and fewer awkward queries on each invoice.

Speak to the invoice finance team

Every workshop is different, and the right structure depends on your job mix, your billing, your contracts and who your customers are. As a commercial finance broker covering the specialist invoice finance lenders, we are not regulated by the FCA, which is correct for this kind of business-to-business commercial finance, and it means we can look across the market rather than push a single product. If made-to-order work is tying up your cash, speak to the invoice finance team and we will talk through what fits your order book.