Guide

Asset-based lending explained

Harbor Distributors ran a $280 million wholesale business with $110 million of outstanding debt under an asset-based lending (ABL) facility. Treasury modeled $95 million of availability against a $120 million commitment — comfortable for a Q3 inventory build tied to back-to-school season. Then the lender's semiannual field exam arrived. Auditors reclassified $31 million of slow-moving SKUs as ineligible inventory, applied a customer concentration cap that excluded a major retailer's receivables, and added a dilution reserve for rising chargebacks. The borrowing base fell from $118 million to $87 million while draws stood at $109 million. Harbor faced a borrowing-base deficiency of $22 million and seven business days to cure via mandatory prepayment or additional collateral — mid-quarter, before holiday receipts could replenish the base.

Asset-based lending is senior secured credit where availability is tied to the liquidatable value of working-capital collateral — primarily accounts receivable and inventory — not just EBITDA projections. ABL is the dominant structure for retailers, distributors, manufacturers, and other asset-heavy borrowers whose balance sheets swing with seasonality. Lenders underwrite collateral quality through advance rates, eligibility definitions, and ongoing monitoring rather than relying solely on cash-flow covenants. This guide explains borrowing-base mechanics, advance-rate tiers, field exams and cash dominion, how ABL differs from covenant-lite revolvers, the Harbor Distributors walkthrough, a technique decision table versus cash-flow revolvers and factoring, common pitfalls, and a treasury checklist.

What asset-based lending is

Asset-based lending (ABL) is a form of senior secured credit where the lender sizes and monitors the loan against a formulaic borrowing base derived from eligible collateral. The borrower can draw, repay, and re-borrow within available capacity — structurally similar to a revolving credit facility, but with collateral-driven availability instead of commitment minus outstanding borrowings alone.

Typical ABL borrowers include:

Wholesale distributors — large inventory and trade receivables cycles.
Retailers — seasonal inventory builds and vendor payment timing.
Manufacturers — raw materials, WIP, and finished-goods inventory plus customer AR.
Turnaround and sponsor-backed companies — weak EBITDA but salvageable collateral.

ABL sits at the top of the capital stack: first-lien on receivables, inventory, and often cash. Term loans and mezzanine debt may sit behind the same collateral package with intercreditor agreements defining payment priority and release mechanics.

The borrowing-base formula

Availability equals the lesser of total commitment and the calculated borrowing base, minus outstanding borrowings, letters of credit, and reserves:

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

Accounts receivable component

Advance rate — typically 80–90% of eligible domestic receivables; 50–75% for foreign AR.
Eligibility — invoices current within 60–90 days, no intercompany balances, no contra accounts beyond defined dilution limits.
Concentration limits — any single customer above 10–25% of total AR may be excluded from the base.
Dilution reserve — haircut for expected credits, returns, and chargebacks (often 2–5% of gross AR).

Inventory component

Finished goods — 50–65% advance rate.
Work-in-progress — 0–30%; often excluded entirely.
Raw materials — 30–50%; lower if commodity price volatile.
Aging limits — inventory on hand more than 90–180 days typically ineligible.

The base is recalculated weekly or monthly via a borrowing-base certificate the borrower submits. Lenders compare reported figures against field-exam findings and can adjust advance rates or eligibility definitions if collateral quality deteriorates.

Advance rates, reserves, and overadvances

Advance rates reflect how quickly collateral can be liquidated in a distress scenario. Receivables advance higher than inventory because AR converts to cash faster; inventory requires appraisal, sale, and may obsolesce.

Reserves reduce availability beyond formula haircuts:

Rent and payroll reserve — holds back capacity for fixed operating costs.
Seasonal reserve — extra haircut before peak inventory builds.
Availability block — lender-imposed freeze during covenant review or field exam.

An overadvance occurs when outstanding borrowings exceed the borrowing base — a deficiency that triggers mandatory prepayment, often within five to ten business days. Some facilities permit temporary overadvances at the lender's discretion (e.g., pending AR collection) but charge premium pricing.

Understanding the difference between gross collateral on the balance sheet and eligible collateral in the base is central to ABL liquidity planning. Harbor's $142 million of inventory became $89 million eligible after aging and obsolescence haircuts — a gap treasury had not modeled.

Field exams, borrowing-base audits, and cash dominion

ABL lenders monitor collateral more intensively than cash-flow lenders:

Field exams

Independent auditors visit the borrower (typically semiannually) to verify inventory counts, AR aging, ineligible items, and lien perfection. Field-exam findings can retroactively change eligibility definitions and trigger deficiencies even when the borrower's monthly certificates looked clean.

Borrowing-base audits

Lighter-touch reviews of submitted certificates — sampling invoices, confirming customer existence, testing dilution rates. Discrepancies lead to reserve increases or advance-rate reductions.

Cash dominion and lockbox

Many ABL facilities require cash dominion: customer payments flow into a lender-controlled lockbox account. Cash is swept daily to repay the facility, and the borrower re-borrows for operating needs. Dominion activates automatically upon an event of default or sometimes when utilization exceeds a threshold. It gives lenders direct control over the primary collateral conversion path — AR collections.

Cash dominion is less common in investment-grade structures but standard in middle-market and distressed ABL. Borrowers lose flexibility to sweep excess cash to subsidiaries or fund dividends while dominion is active.

ABL vs cash-flow lending and factoring

The choice between ABL and alternatives depends on collateral quality, EBITDA stability, and speed of setup:

ABL vs covenant-lite cash-flow revolver

ABL — sizes credit to collateral; weaker EBITDA borrowers can still access liquidity if assets are liquid.
Cash-flow revolver — sizes to EBITDA multiples; simpler availability but requires stable cash generation and sponsor support.

Hybrid structures exist: ABL revolver for working capital plus a cash-flow term loan for acquisition debt, with the ABL lender holding first lien on current assets.

ABL vs factoring and supply-chain finance

Supply-chain finance and true factoring sell or assign specific receivables. ABL is a committed facility secured by a pool of assets — more flexible for inventory-heavy borrowers but with higher setup cost, ongoing monitoring, and covenant complexity. Factoring suits smaller firms with clean domestic AR; ABL suits larger borrowers with mixed collateral.

How ABL fits working-capital cycles

ABL availability naturally expands and contracts with the cash conversion cycle:

Inventory build phase — inventory collateral rises but AR may be low; net base can shrink if inventory advance rates are lower than AR rates.
Peak sales phase — AR surges; base expands if receivables are eligible and within concentration limits.
Collection phase — AR converts to cash; under cash dominion, cash sweeps reduce borrowings automatically.

Seasonal borrowers must model base availability by month, not annual averages. A facility that looks ample in February may be deficient in September when aged inventory accumulates and new-season goods have not yet sold through.

In an LBO context, sponsors often use ABL for the revolver tranche because target companies carry significant working-capital assets. Term loan B debt funds the purchase price against enterprise value; ABL funds post-close operations.

Harbor Distributors: when the field exam bites

Harbor's pre-exam borrowing-base certificate (August):

Gross AR: $94M; eligible AR after aging and concentration: $71M × 85% = $60.4M
Gross inventory: $142M; eligible after aging: $89M × 60% = $53.4M
Gross borrowing base: $113.8M → capped at $120M commitment
Outstanding borrowings: $109M
Reported availability: $4.8M (tight but positive)

Field-exam adjustments:

Reclassified $31M of “promotional” inventory as ineligible (no open customer orders).
Applied 20% customer cap excluding $18M of a big-box retailer's AR.
Increased dilution reserve from 3% to 5% after rising returns.
Revised eligible inventory: $58M × 55% (rate step-down) = $31.9M
Revised eligible AR component: $53M × 85% = $45.1M
Adjusted borrowing base: $77.0M
Deficiency: $109M − $77M = $32M overadvance

Harbor cured $22M within the cure period via an equity injection from its sponsor and accelerated AR collections; the remaining $10M was cured over six weeks as ineligible inventory sold through at a discount. Post-cure, Harbor renegotiated advance rates, added a rolling 13-week cash-flow forecast covenant, and implemented weekly SKU-aging dashboards — accepting higher monitoring cost to avoid another mid-quarter liquidity shock.

Technique decision table

Structure	Best when	Strengths	Trade-offs
ABL revolver	Asset-heavy, seasonal, cyclical revenue	Credit sized to collateral; works with weak EBITDA	Field exams, weekly certificates, cash dominion risk
Cash-flow revolver	Stable EBITDA, low seasonality, sponsor-backed	Simple availability; fewer collateral audits	Lower commitments for asset-rich / low-EBITDA borrowers
True factoring	Smaller firms, clean domestic AR, fast setup	Non-recourse options; quick liquidity	Customer notification; no inventory component
Reverse factoring / SCF	Investment-grade buyers, supplier programs	Low supplier cost; off-balance-sheet options	Buyer-dependent; not a general WC backstop
Term loan (senior secured)	Permanent capital, acquisition, capex	Fixed amortization; no base recalculation	Not reusable; prepayment penalties

Common pitfalls

Modeling gross collateral as eligible — aging, concentration, and obsolescence haircuts shrink the base silently.
Ignoring field-exam timing — semiannual audits can trigger deficiencies unrelated to current operations.
Underestimating inventory advance rates — WIP and raw materials contribute less than finished goods.
Concentration cap blind spots — a single large customer can exclude millions of AR overnight.
Cash dominion surprise — default or high utilization triggers lockbox sweeps that freeze discretionary cash.
Certificate lag — monthly reporting means treasury learns about deficiencies weeks after collateral aged out.
Overadvance cure windows — five-to-ten-day cure periods are unforgiving mid-season.
Cross-default with term debt — an ABL deficiency can accelerate the entire bank group.

Treasury and credit checklist

Build a monthly borrowing-base model with eligibility haircuts by SKU and customer.
Stress-test advance-rate step-downs and concentration caps at 10%, 15%, and 20%.
Align field-exam calendar with inventory build and promotional cycles.
Track days-inventory-on-hand and days-sales-outstanding against eligibility thresholds.
Model cash dominion impact on subsidiary cash sweeps and dividend capacity.
Maintain a 15–20% availability buffer below calculated headroom.
Pre-negotiate overadvance cure periods and equity-cure rights with sponsors.
Compare all-in ABL cost: unused fees, field-exam fees, monitoring, and spread step-ups.
Coordinate ABL maturity with term-loan refinancing timelines.
Document weekly certificate process with AR aging and inventory eligibility reports.

Key takeaways

ABL sizes credit to eligible collateral through a borrowing-base formula — not headline balance-sheet assets.
Advance rates, concentration caps, and dilution reserves determine how much AR and inventory actually support liquidity.
Field exams and cash dominion give lenders ongoing control that cash-flow revolvers rarely exercise.
Harbor Distributors shows why treasury must model eligibility, not gross collateral, and plan for mid-quarter deficiencies.
Match structure to business model: ABL for asset-heavy seasonality, cash-flow revolvers for stable EBITDA, factoring for smaller AR-only borrowers.