Asset-based lending underwrites a pool of collateral, not a company’s earnings. That single difference moves the risk, changes who it suits, and is why it holds up when cash-flow lending cracks.
Key takeaways
- Asset-based lending sizes a loan to a monitored pool of collateral, not to the borrower’s earnings. That is the whole distinction, and it decides where the risk lives.
- The borrowing base is the mechanism: eligible collateral times an advance rate, minus reserves, recalculated on a regular cadence. Advance rates run roughly 70 to 90% on receivables, 40 to 60% on inventory, 50 to 75% on equipment.
- The security is only as good as the lender’s control of cash and collateral. Lockboxes, field exams and appraisals are where ABL is won or lost.
- ABL and the wider asset-based finance market are among the fastest-growing parts of private credit, with KKR projecting $9.2 trillion by 2029 and Apollo sizing the opportunity at around $20 trillion.
Most people file asset-based lending under “loans to companies that can’t get a normal loan.” That is the wrong mental model, and it is worth correcting before you allocate a penny near it.
Asset-based lending is not lending to weak businesses. It is lending against a pool of assets a lender can measure, re-value and, if it comes to it, sell. The borrower’s cash flow matters, but it is not the thing the loan is sized against. The collateral is. That single difference changes where the risk sits, how the loan behaves in a downturn, and what a lender has to be good at to make money. It is also why this corner of private credit has grown into one of the largest in the market. KKR puts the private asset-based finance market at over $6.1 trillion and expects it to reach $9.2 trillion by 2029, larger than today’s syndicated loan, high-yield bond and direct lending markets combined (KKR).
Asset-based lending, the borrowing base that structures it, and where the risk sits for an investor allocating to it are worth taking in turn. This is analysis of how the instrument behaves, not advice on your money.
What asset-based lending is
Asset-based lending (ABL), sometimes written asset based lending, is secured lending where the amount you can borrow moves with the value of a defined collateral pool. Instead of underwriting mainly to earnings and projected cash flow, the lender underwrites to assets it can verify and control.
Most ABL is a revolving facility that funds working capital: as a business sells goods and collects invoices, its borrowing capacity rises and falls with the collateral behind it. It can also be a term loan against long-lived assets such as equipment, but the core idea holds either way. Borrowing capacity is anchored to collateral, not to a forecast.
The regulator’s own definition lands in the same place. The US Office of the Comptroller of the Currency describes asset-based lending as loans “secured by the borrower’s assets” where the lender relies on “close monitoring of collateral” and control of the cash the collateral generates, rather than on the borrower’s general creditworthiness (OCC Comptroller’s Handbook). Monitoring is doing the heavy lifting there. Hold that thought, because it is the part that separates a good ABL lender from a bad one.
What you can borrow against
The “asset” in asset-based lending usually falls into one of four buckets, and the lender advances a different percentage against each depending on how liquid it is and how much control the lender has over it.
- Receivables (accounts receivable): invoices customers owe. Often the cleanest collateral because it self-liquidates as customers pay.
- Inventory: finished goods, work in progress, raw materials. Financeable, but appraisal-driven and exposed to obsolescence.
- Equipment: machinery, vehicles, plant. Underwritten on resale value and how specialised the asset is.
- Real estate: sometimes folded in as additional collateral, though property lending is really its own discipline.
Just as important is what a lender will not lend against: disputed invoices, receivables that are too old, sales to shaky counterparties, stock no independent appraiser can value, and assets sitting in jurisdictions where enforcing security is slow or uncertain. The exclusions are where a lender protects itself, and they are the reason the headline collateral figure and the actual borrowing capacity are never the same number.
How asset-based lending works: the borrowing base
If you understand ABL only as “secured lending,” you miss the mechanism that makes it work. The engine is the borrowing base.
A borrowing base is a formula that converts eligible collateral into permitted debt. It gets recalculated on a set cadence, often weekly or monthly, sometimes daily for larger borrowers. A simplified version:
> Borrowing base = (eligible receivables × advance rate) + (eligible inventory × advance rate) − reserves
Two inputs do most of the work. Advance rates set how much a lender will lend against each dollar of collateral. Eligibility and reserves decide which collateral counts and how much of a haircut gets applied on top.
Typical advance rate ranges, which move with borrower quality and collateral mix:
- 70 to 90% against eligible receivables (Wall Street Prep)
- 40 to 60% against eligible inventory
- 50 to 75% against appraised equipment, often on a net orderly liquidation value basis rather than book value
Eligibility is where a lender filters out concentrated customers, affiliate sales, overdue invoices, cross-border collection risk and anything with a title or dispute problem. Reserves are lender-imposed haircuts for known issues: seasonality, dilution, returns, chargebacks, slow-moving stock, covenant headroom. Reserves are how a lender keeps discretion inside the structure even after the advance rates are set.
A worked borrowing base
Numbers make this concrete. Take a mid-sized manufacturer with a collateral pool of the shape you would actually see, and run the standard filters against it.
Gross collateral on the books:
| Collateral | Gross value |
|---|---|
| Accounts receivable | $10,000,000 |
| Inventory | $6,000,000 |
| Equipment (appraised NOLV) | $2,500,000 |
Now the eligibility filters. Say $1.2m of receivables are more than 90 days old or in dispute, and one customer alone accounts for concentration above the 20% cap, knocking out a further $800,000. Eligible receivables fall to $8.0m. On inventory, raw materials and work in progress that no appraiser will independently value strip out $1.5m, leaving $4.5m eligible. Equipment is already stated at net orderly liquidation value, so all $2.5m qualifies.
Apply advance rates: 85% on receivables, 50% on inventory, 70% on equipment. Then subtract a $600,000 reserve the lender holds against historical dilution and returns.
| Step | Calculation | Amount |
|---|---|---|
| Eligible receivables × 85% | $8,000,000 × 0.85 | $6,800,000 |
| Eligible inventory × 50% | $4,500,000 × 0.50 | $2,250,000 |
| Eligible equipment × 70% | $2,500,000 × 0.70 | $1,750,000 |
| Subtotal | $10,800,000 | |
| Less: dilution/returns reserve | −$600,000 | |
| Borrowing base (availability) | $10,200,000 |
The business carries $18.5m of collateral on its books and can borrow $10.2m against it. That gap, roughly 45%, is not the lender being stingy. It is the difference between what an asset is worth on a balance sheet and what it is worth to someone who has to collect or liquidate it in a hurry. The borrowing base is that discount, written down as a formula and re-run every week.
Control and monitoring: the “so what” of security
Security is only as good as a lender’s ability to control the cash and see the collateral. This is the part the OCC keeps returning to, and it is where “secured” deals go wrong. In a well-run facility you tend to see:
- Lockbox or controlled collections: customer payments sweep into lender-controlled accounts, so cash cannot be diverted before it pays down the loan.
- Field exams: periodic on-site testing of receivables, inventory, processes and the integrity of the borrower’s reporting.
- Appraisals: third-party valuations of inventory and equipment, refreshed on a schedule.
- Borrowing base certificates: formal reporting that ties the borrower’s operational data to the availability under the facility.
Most credit losses in supposedly secured deals come from weak monitoring, not from missing security documents. A lien on inventory means nothing if the inventory has quietly walked out the door since the last field exam. This is why ABL is an operations business as much as a lending business, and why the good lenders build teams of examiners and appraisers rather than just credit analysts.
How ABL differs from cash-flow lending
The cleanest way to understand asset-based lending is to put it next to the thing most private credit does: cash-flow lending. Direct lending, the biggest slice of private credit, sizes a loan to a company’s earnings, typically a multiple of EBITDA, and relies on covenants and future cash generation to get repaid. ABL sizes the loan to collateral and relies on controlling that collateral.
| Asset-based lending | Cash-flow lending | |
|---|---|---|
| What the loan is sized to | Value of a monitored collateral pool | A multiple of earnings (EBITDA) |
| Primary repayment source | Liquidation or collection of collateral | The borrower’s operating cash flow |
| Where the risk concentrates | Collateral quality, controls, legal priority | The accuracy of the earnings forecast |
| Behaviour in a downturn | Capacity contracts as collateral shrinks | Covenants trip; recovery hinges on going-concern value |
| What the lender must be good at | Appraisal, field exams, cash control | Credit underwriting, forecasting |
The line in that table that matters most for an investor is the downturn row. In cash-flow lending, a stressed borrower is worth less precisely when you need the collateral, because the value was always the business as a going concern. In ABL, borrowing capacity falls automatically as receivables and inventory shrink, which limits a lender’s ability to over-advance right before things turn. That is not painless for the borrower, but it is a discipline the structure enforces on the lender, and it is why disciplined ABL has historically held up through cycles that punished looser lending.
Apollo, which has run an ABL business since 2009, frames the same point from the asset side: in asset-based finance “your investment is backed by a pool of things that actually have cash flow and self-amortise over time,” rather than by the operations of a single company (Apollo). The collateral pays the loan down on its own schedule, whether or not the borrower is thriving.
Where ABL sits inside private credit
Asset-based lending is the working-capital, single-borrower end of a much bigger category the large managers call asset-based finance (ABF), which also bundles pools of consumer loans, mortgages, aircraft, equipment leases and royalties. The distinction matters less than the direction of travel, which is steeply up.
Private debt as a whole reached roughly $1.7 trillion in assets under management, up from about $1 trillion in 2020 (Preqin). Inside that, ABF is where the biggest managers are pointing capital. KKR built its ABF platform from a 2016 start to more than $74 billion in assets under management, and in July 2025 closed a $6.5 billion fund dedicated to it (KKR). Apollo estimates the total addressable ABF market at around $20 trillion; Blue Owl sizes it at about $11 trillion with only 4% penetrated by private capital so far (Apollo). Whichever number you trust, the private share today is small and the runway is long.
That growth is also drawing regulatory attention. As non-bank credit has expanded, supervisors have started asking whether risk that left the banking system has genuinely been reduced or simply moved somewhere harder to see. The IMF’s Global Financial Stability Report series is the readable reference point for how private credit and asset-based structures look through a systemic lens (IMF). For an investor, the takeaway is not to avoid the category. It is to treat the manager’s monitoring capability, not the headline yield, as the thing you are actually buying.
If you want the broader context of where this fits, our guide to private credit covers the wider market, and for a sense of how the same “who actually runs the money” question plays out in a neighbouring corner, see our breakdown of the largest multi-strategy hedge funds ranked by AUM.
FAQs
Is asset-based lending riskier than a normal loan?
carries risk differently. Because the loan is secured against collateral a lender controls and re-values, the risk concentrates in collateral quality, valuation accuracy and legal priority rather than in an earnings forecast. Well-monitored ABL has historically held up through downturns; poorly monitored ABL fails the same way any secured loan fails, when the collateral is not really there.
What is the difference between asset-based lending and factoring?
Factoring sells specific invoices outright to a third party. Asset-based lending keeps the assets on the borrower’s books and lends against a revolving pool of them through a borrowing base. Factoring is a sale; ABL is a secured loan.
What is a borrowing base certificate?
It is the regular report a borrower submits showing its eligible collateral and the resulting availability under the facility. The lender uses it to reset how much the borrower can draw. It is the document that ties day-to-day operations to the size of the loan.
Why do lenders advance less than 100% of collateral value?
Because balance-sheet value is not liquidation value. Advance rates and reserves build in the discount a lender would face collecting receivables or selling inventory quickly, plus haircuts for disputes, concentration and obsolescence.