ABL Advance Rates: How Lenders Calculate Availability on AR and Inventory

Every borrower hears the same two numbers when they first ask how much an asset-based facility will fund: "85% of receivables and 80% of inventory." Those numbers are real, but they are the starting point of the calculation, not the result. The advance rate a lender actually applies to your collateral is the output of a credit process that runs your AR and inventory through eligibility screens, an appraisal, a dilution study, concentration tests, and a reserve stack. Two businesses with the same $20M of gross collateral can end up with materially different availability — because the factors underneath the headline rate are different.

This is a plain-English walkthrough of how ABL lenders actually set advance rates on accounts receivable and inventory: what drives each rate up or down, how the appraisal and the field exam feed the number, where reserves come in, and how it all compounds into the availability you can draw. I have spent five decades inside these structures — I wrote Asset Based Lending Disciplines, the first textbook on the discipline, trained more than 5,000 lenders and field examiners, and was inducted into the SFNet Hall of Fame in 2021. For the foundational overview of the category, start with what asset-based lending is; this post zooms into the single question borrowers ask most — how much will my collateral actually advance?

What an Advance Rate Actually Is

An advance rate is the percentage of an eligible collateral pool that the lender will lend against. It is applied after the pool has been screened for eligibility, not against your gross balance. The borrowing base — the amount you can actually borrow on a given day — is built like this:

Borrowing base = (Eligible AR × AR advance rate) + (Eligible inventory × inventory advance rate) − reserves

Three levers move the result, and they move it in sequence. First, eligibility shrinks the gross pool to the eligible pool. Second, the advance rate is applied to that eligible pool. Third, reserves are subtracted. A borrower who fixates only on the headline advance rate is watching the middle lever and ignoring the two that often matter more. We break the eligibility step down in eligible vs. ineligible receivables and the full ineligible cascade in ABL ineligible calculations; this post focuses on how the advance rate itself is set.

The AR Advance Rate: What Sets the 85%

The receivables advance rate on a healthy middle-market book typically lands between 80% and 90%, with 85% the most common starting point. The lender is asking a single underwriting question: if the borrower defaults tomorrow, what fraction of this receivable pool will I actually collect? The advance rate is their answer, and these are the factors that move it.

Dilution

Dilution is the single largest driver of the AR advance rate. It measures the gap between what the borrower invoices and what the borrower collects — returns, allowances, rebates, short-pays, credits, and write-offs. The standard measure is:

Dilution % = (Credits + Returns + Allowances + Write-offs) ÷ Gross Sales, over a trailing twelve months.

Lenders frequently set the AR advance rate as roughly 100% minus dilution, minus a cushion. A book with 5% dilution supports a higher advance rate than a book with 15% dilution, because more of every invoiced dollar actually turns into cash. High or volatile dilution either lowers the headline rate or shows up as a separate dilution reserve — covered in depth in ABL borrowing base reserves.

Customer credit quality and mix

Receivables owed by investment-grade or large, creditworthy customers carry less collection risk than receivables owed by small or distressed accounts. A book concentrated in strong national accounts supports a higher rate than a fragmented book of marginal payers. Some lenders maintain a separate, higher sub-limit advance rate (sometimes 90%) for receivables backed by credit insurance or owed by named investment-grade obligors.

Aging and turn

Receivables that pay in 30–45 days are worth more than receivables that drift to 90+. Beyond the eligibility cutoff (typically 90 days from invoice, sometimes 60), aged receivables fall out of the pool entirely. Within the eligible window, a slow-turning book invites a slow-pay reserve or a lower rate.

Concentration

When one customer represents an outsized share of the book — typically anything over 10–20% — the lender either caps the eligible amount for that customer or applies a concentration reserve, because the failure of a single payer would impair a large slice of the collateral at once. Concentration rarely changes the headline rate, but it shrinks the eligible pool the rate is applied to.

Verification and field exam findings

Before a lender trusts your AR aging, a field examiner tests it — confirming invoices represent real shipments, checking for unapplied cash, contras, and the gap between your reported dilution and the dilution the exam actually measures. A clean exam supports the negotiated rate; an exam that surfaces higher-than-reported dilution, unrecorded credits, or weak collection controls pushes the rate down or adds reserves. We cover what examiners look for in ABL field examinations and the specific adjustments they make in common field exam findings.

The Inventory Advance Rate: Why NOLV Is the Anchor

Inventory is harder to value and harder to liquidate than receivables, so its advance rate is lower — and it is calculated against a different base. Receivables advance against their face (eligible) amount. Inventory advances against its Net Orderly Liquidation Value (NOLV), not its cost or book value. This is the distinction that trips up most first-time ABL borrowers.

NOLV vs. cost — the two-step that confuses borrowers

NOLV is the appraiser's estimate of what the inventory would fetch in an orderly, time-limited liquidation, net of the costs of selling it. It is expressed as a percentage of cost. A finished-goods inventory might appraise at, say, 70% NOLV — meaning $10M at cost is worth $7M in an orderly liquidation. The lender then applies an advance rate to that NOLV figure.

So when a lender quotes "85% of NOLV" and the NOLV is 70% of cost, the effective advance against cost is 0.85 × 0.70 = 59.5% of cost. The headline "85%" and the effective "~60%" are both true — they just measure against different bases. How the appraisal produces the NOLV percentage, what it costs, and how often it refreshes is the entire subject of ABL appraisals: NOLV, FLV, types, timing, and cost.

What moves the NOLV percentage

• Inventory type. Finished goods that can be resold to the same market appraise highest. Raw materials with a broad commodity market appraise reasonably. Work-in-process — partially built product with no resale market — often appraises near zero and is frequently ineligible entirely.
• Marketability and brand. Branded, in-demand product liquidates closer to retail. Private-label, custom, perishable, fashion, or seasonal goods discount sharply.
• Obsolescence and turn. Slow-moving or aged SKUs get marked down; the appraiser reviews turn by category and discounts the long tail.
• Recovery channel. Goods that move through established secondary channels (liquidators, jobbers, online marketplaces) carry higher NOLV than goods with no liquidation market.

What moves the advance rate on top of NOLV

Given a NOLV, the advance rate against it usually lands between 80% and 90% for stable, well-documented inventory. It tightens when the inventory mix is volatile, when locations are hard to access or appraise, when the inventory sits in third-party or consigned locations without bailee/landlord waivers, or when prior appraisals have shown the NOLV percentage drifting down. Tariff-exposed and import-heavy inventory has been a recurring source of NOLV compression — see tariffs and your ABL inventory collateral.

Reserves: The Third Lever Borrowers Forget

Even after eligibility and advance rates, the lender subtracts reserves before you reach drawable availability. Reserves are dollar amounts carved out to cover risks the advance rate alone does not address. The common ones:

• Dilution reserve — where dilution is high or lumpy, a dollar reserve rather than (or in addition to) a rate haircut.
• Concentration reserve — for over-cap exposure to a single customer.
• Rent and landlord reserves — for inventory in leased or third-party space without a waiver, covering what the lender would owe to access and remove it.
• Slow-pay, dispute, and contra reserves — for receivables with collection or offset risk.
• Other operating reserves — payroll, sales/use tax, customer deposits, gift-card or warranty liabilities.

Reserves can quietly compress availability by 10–25% of the gross borrowing base, and they are among the most negotiable terms in the entire facility. Each reserve, how it is calculated, and where borrowers can push back is the subject of ABL borrowing base reserves.

A Worked Example: From $20M of Collateral to Real Availability

Numbers make this concrete. Take a manufacturer with $12M of gross AR and $10M of inventory at cost. Here is how the advance rate calculation flows to availability.

Step	AR	Inventory
Gross collateral	$12.0M	$10.0M (at cost)
Less ineligibles (aged 90+, foreign, contras, over-concentration, WIP)	−$2.0M	−$1.5M
Eligible pool	$10.0M	$8.5M (at cost)
NOLV (inventory only, 70% of cost)	—	$5.95M
Advance rate	85%	85% of NOLV
Gross availability	$8.5M	$5.06M
Less reserves (dilution, rent, etc.)	−$1.3M (across both)
Net availability	≈ $12.26M

Notice what happened. The borrower started with $22M of gross collateral and ended with roughly $12.3M of drawable availability — about 56% of the gross. The headline advance rates (85% / 85%) were never the binding constraint. Eligibility removed $3.5M, the NOLV step cut the inventory base from $8.5M of cost to $5.95M before any advance rate applied, and reserves took another $1.3M. The effective advance against gross inventory cost here is roughly 50%, not 85% — and a borrower who budgeted off the headline number would be $3–4M short of what they expected. (Illustrative figures; every facility is modeled on its own collateral.)

Why Two Borrowers Get Different Rates on the Same Collateral

The factors above explain why advance rates are not a posted price. A distributor of branded, fast-turning goods sold to creditworthy national accounts with 4% dilution and no customer over 10% will earn a high AR rate, a high NOLV, and a thin reserve stack. A manufacturer of custom product sold to a fragmented base with 14% dilution, two customers at 25% each, and a lot of work-in-process will see a lower effective rate at every step — even if both are quoted "85%" on the term sheet. The headline rate is marketing; the effective rate is underwriting.

This is also why the structure of the term sheet matters as much as the rate. Whether dilution is handled as a rate haircut or an excess-over-threshold reserve, where the concentration cap is set, and how often the appraisal and exam refresh all change your real availability without touching the headline number. The negotiable points are laid out in the ABL term sheet key terms, and reading your monthly number line by line is covered in how to read an ABL borrowing base certificate. When the conventional rates still do not generate enough availability, the structures that push beyond them are covered in stretch ABL.

What Borrowers Can Actually Control

• Lower and document dilution. Clean up returns and credit processing, separate one-time items from run-rate dilution, and report it monthly. This is the most direct lever on the AR rate.
• Tighten collections and aging. Keep receivables inside the eligibility window and the book turning; fewer 90+ accounts means a larger eligible pool.
• Diversify or insure concentration. Credit insurance or a broader customer base relieves the concentration cap that shrinks the eligible pool.
• Manage inventory mix and obsolescence. Move slow SKUs, minimize WIP exposure, and keep inventory in waived locations to protect both NOLV and the rate on top of it.
• Prepare for the field exam and appraisal. A clean exam and a well-supported appraisal defend the rate; surprises erode it. See our ABL due diligence checklist.

What We Do at Don Clarke Enterprises

Before we take a deal to market, we rebuild the borrowing base from your raw collateral data — running your AR through the eligibility and dilution screens a credit-trained examiner will actually apply, and modeling your inventory at a realistic NOLV rather than a hopeful one. That gives the borrower a true picture of availability before a single lender sees the file, and it gives us the basis to negotiate advance rates, eligibility definitions, and reserves that hold up through the first field exam instead of getting retraded at closing. With 60+ active lender relationships across banks, specialty platforms, and private credit, we place the facility with the lender whose advance-rate appetite and structure fit the collateral — not the first one to quote a headline number.

If you want a straight answer on what your AR and inventory will actually advance — modeled the way a lender will model it — call us at (954) 962-0099, email info@donclarkeenterprises.com, or submit the situation through the form below. We will come back inside 48 hours.