Manufacturing Finance
A practical guide for manufacturers and product businesses on how inventory lines of credit and work-in-process (WIP) financing work, why they are harder to secure than they should be, and how to structure capital that actually frees the cash trapped on your shop floor.
Ask a manufacturing CFO where the company’s cash is, and the honest answer is rarely “in the bank.” It is in raw materials waiting to be run, in half-finished goods on the production floor, in finished inventory waiting to ship, and in receivables waiting to be paid. That is the cash conversion cycle, and for growing manufacturers, it is the single biggest constraint on scale. You can have a full order book and still run short of cash, because every dollar of growth ties up more working capital before it returns a dollar of profit.
Two financing tools are built precisely for that problem: the inventory line of credit and work-in-process (WIP) financing. Used well, they convert the value sitting in your operation into available liquidity. Used poorly, or denied outright by a rigid lender, they become a quarterly source of stress. This guide explains how each works, what lenders actually evaluate, and how the right structure unlocks growth instead of throttling it.
What is an inventory line of credit?
An inventory line of credit is a revolving facility secured by your inventory. Rather than a fixed lump sum, you draw against a borrowing base, a dynamic limit calculated as a percentage of your eligible inventory (and usually your receivables), recalculated as your balances move. As you build inventory, availability rises; as you sell it, availability falls and is repaid. It is designed to breathe with your operating cycle.
The critical mechanic is the advance rate, which is how much a lender will lend against each dollar of collateral. Lenders discount inventory heavily because, in a worst case, they have to liquidate it, and liquidation rarely returns full book value. Per the OCC’s guidance on asset-based lending and standard market practice, typical ranges look like this:
| Collateral | Typical advance rate | Why |
|---|---|---|
| Accounts receivable | 70 to 85% | Most liquid; turns to cash on its own |
| Finished goods | about 50 to 65% of NOLV | Salable, but liquidation below book value |
| Raw materials | about 25 to 50% | Marketable only if commoditized |
| Work-in-process (WIP) | Often 0%, excluded | Hard to value and to sell as-is |
Two terms decide your real availability. NOLV (net orderly liquidation value) is what an appraiser believes your inventory would fetch in an orderly sale, net of costs, and advance rates are applied to that, not your cost or retail value. And eligibility rules carve out “ineligibles” (obsolete, slow-moving, consigned, or specialized stock) before the advance rate is even applied. Expect periodic field exams (collateral audits) and regular borrowing-base reporting as conditions of the facility.
What is work-in-process (WIP) financing?
WIP financing addresses the part of the cycle most lenders refuse to touch: the capital sunk into goods that are started but not yet finished or invoiced. For a make-to-order or project-based manufacturer, this “pre-invoicing” stage can be the most cash-intensive part of the entire job, with labor, components, and overhead all flowing out before a single invoice can be raised.
Here is the hard truth most owners discover the wrong way: conventional lenders almost always exclude WIP from the borrowing base. As specialty lenders and industry references explain, WIP is problematic collateral for three reasons:
- Valuation complexity. Partly-finished goods are hard to appraise, so lenders demand cost tracking, audits, or milestone verification.
- Conversion risk. If production stalls, quality fails, or the order falls through, the collateral may never become salable.
- Monitoring burden. WIP cannot simply be counted on a shelf; it has to be tracked through the production process.
Because of that risk, WIP financing typically requires a lender who understands manufacturing, often layers in additional collateral or the end-customer’s creditworthiness, and structures around production milestones or confirmed purchase orders. It exists, but it is specialist work, not a checkbox on a standard bank application.
Why is bank access tightening for smaller manufacturers?
Demand for these facilities is rising while traditional access narrows. Through early 2026, banks continued to report tightening their lending standards for commercial and industrial loans. For smaller manufacturers, the friction compounds:
- Collateral haircuts and exclusions leave the borrowing base far below the value the owner sees on the balance sheet, especially when WIP and raw materials are discounted or excluded.
- The “bankable” wall. Thinner credit files, customer concentration, or a recent loss can disqualify a fundamentally sound manufacturer from a conventional bank facility.
- Reporting and exam demands can overwhelm a lean finance team that does not have a lender-ready borrowing-base process in place.
- Tariff- and supply-chain-driven inventory builds are forcing manufacturers to carry more raw materials and finished goods than ever, increasing the exact capital need that rigid lenders are least willing to fund.
The market is responding: as banks keep tightening standards on commercial and industrial credit, demand for asset-based lending is growing and borrowing is migrating from rigid bank facilities toward flexible, collateral-aware structures and specialty lenders that can advance against the inventory, receivables, and work-in-process a manufacturer already holds.
What lenders actually look for
Knowing how these facilities are underwritten lets you prepare, and it signals which lenders are worth your time:
- Quality and mix of collateral. The ratio of receivables and finished goods (more advanceable) to raw materials and WIP (less so), and an appraisable NOLV.
- Borrowing-base reporting. Timely, accurate inventory and AR reporting; clean aging; low dilution (returns, credits, disputes).
- Customer credit and concentration. For WIP and PO-driven facilities, the strength of the end buyer often matters as much as your own balance sheet.
- Controls and visibility. Perpetual inventory systems and job-cost tracking make WIP fundable that would otherwise be excluded.
The manufacturers who get the best terms are not always the biggest. They are the ones who present their collateral and cash cycle clearly, and who work with a lender willing to look past a rigid template.
If you want to sketch that picture before you ever talk to a lender, paste the prompt below into any AI assistant and fill in the brackets. It builds a rough, lender-ready borrowing-base estimate from your own numbers and flags what a lender is likely to discount or exclude, using the advance-rate ranges from the table above.
How the right partner structures it
This is where the lender you choose matters more than the product label. A capable partner does not just offer “an inventory line.” It engineers a facility around your actual operation: a blended structure that advances against receivables and finished goods, builds in availability for raw materials, and, critically, finds a responsible way to fund the WIP and purchase orders that banks leave on the table. The goal is to compress your cash conversion cycle so a growing order book becomes momentum, not a liquidity crisis.
That is the work Capital Source’s Deal Desk does. We underwrite the full picture (your collateral, your cash cycle, your customers, and your purchase orders) and, through our affiliate, Stretch Finance, LLC, structure inventory, receivables, WIP, and PO financing that fits how your business actually runs, rather than forcing it into a one-size-fits-all credit box. Availability, amounts, structures, and terms depend on your circumstances and are subject to review and approval. For a manufacturer that has heard “no” from a conventional bank, that difference is often the difference between standing still and scaling. You can start an application whenever your numbers are ready.
Put your inventory and WIP to work
If capital is trapped in your raw materials, your production floor, or your receivables, let’s structure a facility that frees it. Tell us where your business is headed and we will structure capital around it.
Key takeaways
- Your cash is on the shop floor. Inventory lines of credit and WIP financing exist to convert that trapped value into liquidity.
- Advance rates and eligibility drive availability. They are applied to NOLV, not book value; finished goods advance best, WIP rarely at all from conventional lenders.
- WIP is specialist work. Funding the pre-invoicing stage takes a lender who understands manufacturing and structures around milestones, POs, and customer credit.
- Access is tightening at banks even as inventory needs grow, pushing demand toward flexible, collateral-aware facilities.
- The right structure compresses your cash conversion cycle and turns growth into momentum instead of strain.
Frequently asked questions
What is an inventory line of credit?
An inventory line of credit is a revolving facility secured by your inventory. Instead of a fixed lump sum, you draw against a borrowing base, a dynamic limit calculated as a percentage of your eligible inventory and usually your receivables, recalculated as your balances move. As you build inventory, availability rises; as you sell it, availability falls and is repaid.
What is work-in-process (WIP) financing?
WIP financing funds the capital sunk into goods that are started but not yet finished or invoiced, the pre-invoicing stage where labor, components, and overhead flow out before an invoice can be raised. For a make-to-order or project-based manufacturer, this is often the most cash-intensive part of the entire job, and it is the part most conventional lenders refuse to fund.
Why do lenders exclude WIP from the borrowing base?
Conventional lenders almost always exclude WIP because it is problematic collateral for three reasons: valuation complexity, since partly-finished goods are hard to appraise; conversion risk, since production can stall or an order can fall through before the goods become salable; and monitoring burden, since WIP cannot simply be counted on a shelf and has to be tracked through production. Funding it takes a lender who understands manufacturing and structures around milestones, purchase orders, and customer credit.
What advance rate can I expect on inventory?
Advance rates vary by collateral type and are applied to liquidation value, not book value. As a general guide, accounts receivable typically advance at 70 to 85 percent, finished goods at about 50 to 65 percent of NOLV, and raw materials at about 25 to 50 percent and only if commoditized, while work-in-process is often advanced at 0 percent because it is excluded. Real advance rates are set by each lender and depend on your collateral and circumstances.
What is NOLV and what is a borrowing base?
NOLV (net orderly liquidation value) is what an appraiser believes your inventory would fetch in an orderly sale, net of costs, and advance rates are applied to that figure rather than to your cost or retail value. The borrowing base is the dynamic limit you can draw against, calculated as the advance rate applied to your eligible inventory and receivables after ineligible stock is carved out, and it is recalculated as your balances move.
Why is bank access tightening for smaller manufacturers?
Through early 2026, banks continued to report tightening their lending standards for commercial and industrial loans, and for smaller manufacturers the friction compounds: collateral haircuts and exclusions shrink the borrowing base, thinner credit files or customer concentration can hit a “bankable” wall, reporting and exam demands strain lean finance teams, and tariff- and supply-chain-driven inventory builds increase the exact capital need rigid lenders are least willing to fund. That pressure is pushing demand toward flexible, collateral-aware facilities.
Sources
- Office of the Comptroller of the Currency, Comptroller’s Handbook: Asset-Based Lending and Accounts Receivable and Inventory Financing.
- eCapital, Work in Process (WIP) Financing; Commercial Capital, What is WIP Financing?
- Federal Reserve, Senior Loan Officer Opinion Survey on Bank Lending Practices (2026).
This article is for informational purposes only and does not constitute financial advice. Advance rates, eligibility, and terms are illustrative of general market practice and vary by lender, collateral, and circumstances; market figures are attributed to the sources listed. Capital Source provides commercial financing solutions through its affiliate, Stretch Finance, LLC; availability, amounts, structures, and terms depend on each business’s circumstances and are subject to review and approval.