Revolver Borrowing Base Management

Executive summary

A revolving credit facility with a borrowing base lets you borrow against your receivables and inventory, up to a committed maximum. The commitment is the ceiling. The borrowing base is the real limit on most days. When receivables age, inventory goes obsolete, or a large customer becomes a concentration problem, the base shrinks, and availability can fall faster than the P&L suggests. Companies get into liquidity trouble this way: results look fine, and then a certificate comes back and the headroom is gone.

Managing the base means three things. First, you understand how your own credit agreement defines eligible assets, advance rates, reserves and the availability calculation. Second, you run a weekly or monthly roll so the base and availability are known before the lender's certificate arrives. Third, you forecast availability inside the 13-week cash flow, so a draw plan never assumes headroom that the base will not support.

Your credit agreement is the only source for definitions, advance rates, concentration limits, reporting frequency and conditions. This guide does not state them and shows them only as bracketed placeholders such as [advance rate]. Nothing here is legal or lender-document advice. When a term is ambiguous, ask counsel and your lender, in writing.

The first step is simple. Pull the agreement, list every defined term that feeds the base, and rebuild the last certificate in a spreadsheet until your number matches the lender's.

When to use this

Use this guide when:

• You have, or are negotiating, an asset-based revolver or a revolver with a borrowing base feature.
• Availability has been tighter than the balance sheet suggests, and nobody can explain the gap.
• Receivables aging is drifting, inventory is building, or a customer concentration is growing.
• The 13-week forecast shows a draw but does not test it against the borrowing base.
• A lender has begun field exams, inventory appraisals, or more frequent reporting.
• You are preparing for a refinancing, or a lender is asking for a collateral-level view.

It is less relevant for a cash-flow revolver governed by covenants only, with no borrowing base. In that case, see the covenant compliance headroom guide.

Diagnostic questions

1. Which document defines the borrowing base, and have you read the current version with every amendment?
2. What assets are in the base (receivables, inventory, others), and what does the agreement say about how each is valued?
3. How does the agreement define eligible receivables? List every exclusion: age, cross-aging, concentration, affiliates, contra accounts, disputes, foreign accounts, credit insurance conditions, and any others.
4. What does the agreement say about eligible inventory: location, type, quality, valuation basis, and how reserves and appraisals enter?
5. What are the advance rates, and do they differ by asset class or by appraisal result? (Read them from the document, do not rely on memory.)
6. What reserves can the lender impose, and under what conditions? Are there reserves currently in place?
7. How often must a borrowing base certificate be delivered, and what supporting reports must go with it?
8. How does availability get calculated: the lesser of the commitment and the base, less outstanding loans, letters of credit and any block or minimum availability requirement?
9. Are there springing conditions, such as cash dominion or a fixed charge coverage test, that depend on availability falling below a stated level?
10. Who prepares, reviews and signs the certificate?
11. How closely does your internal calculation reconcile to the lender's number?
12. Does the 13-week cash flow include a borrowing base availability line?

How to read the answers. If questions 3 to 5 cannot be answered from the document, that is the first job. If question 11 shows a gap, the gap is a hidden defined-term difference or a data issue, and either one can create a misstatement on a signed certificate. If question 12 is "no", your draw plan is a guess.

The framework: from assets to availability

Think of the base as a funnel with five stages. Every stage has a defined term in your agreement.

Formula, in the shape most agreements follow, with every term to be taken from your own document:

Borrowing base = ([AR advance rate] x Eligible receivables)
               + ([Inventory advance rate] x Eligible inventory)
               - Reserves
Availability   = Min(Commitment, Borrowing base) - Loans - Letters of credit - Blocks

Some agreements cap the inventory component at a fixed amount or a share of the base, and some use a formula tied to appraised value. Read, do not assume.

Where the base is most sensitive

• Receivables aging. Past-due thresholds define ineligibility. A collections slip that moves an invoice across a threshold removes it from the base entirely, not partly.
• Cross-aging. Many agreements make all of a customer's receivables ineligible once a defined share is past a threshold. One old invoice can then remove a lot of eligible AR.
• Concentration. A customer above its cap has the excess excluded. Growth with one large customer can reduce eligibility on the way up.
• Contra, disputes and credits. Offsets and disputed items are usually excluded, so unresolved deductions reduce the base.
• Inventory location and type. Goods in transit, at third-party sites, consigned, or in the wrong category may be ineligible.
• Inventory valuation and reserves. If the base uses a valuation net of reserves, an increase in excess and obsolete reserves lowers the base directly. See inventory valuation and excess and obsolete reserves.
• Lender reserves. The lender may impose reserves under the agreement's terms. You should know which ones exist and what triggers them.

Step-by-step process

1. Build the term sheet from the agreement. For each defined term (eligible receivable, eligible inventory, advance rate, reserve, availability, block, certificate frequency), copy the exact clause and section number into a table. Owner: Controller with counsel. Output: definitions table with citations.
2. Rebuild the last certificate. Use the same data cut the lender used. Match their number. Explain every difference. Owner: Controller. Output: reconciled model.
3. Automate the ineligible tests. For each exclusion, define the data field and test. Aging buckets, cross-aging percentage, concentration caps, contra balances, disputed flags, inventory location and category. Owner: Finance systems or FP&A. Output: ineligible report by customer and by location.
4. Set a weekly roll. Every week, refresh receivables and inventory, apply the tests, and compute the base and availability. Owner: Treasury or FP&A. Output: one-page availability report.
5. Define an internal floor. Set a minimum availability, above any contractual block or trigger, that raises an alarm. Base it on your own forecast of the largest weekly outflow, not on a number from elsewhere. Owner: CFO. Output: written trigger.
6. Connect the roll to the forecast. In the 13-week cash flow, add a borrowing base section with projected eligible assets and availability. Each week's draws must pass the availability test. Owner: FP&A. Output: forecast with an availability line.
7. Run the certificate process. Prepare, review, and sign by authorized persons. Retain support. Owner: Controller prepares; CFO signs as the agreement requires. Output: certificate package.
8. Review exceptions. Each week list items that became ineligible this week and why. Owner: Controller with the collections lead and operations. Output: exception log with actions.
9. Manage the lender relationship. Share the model approach in advance of field exams, ask for written confirmation of interpretations, and raise issues before the certificate, not after. Owner: CFO. Output: correspondence log.
10. Test stress cases. Run what-ifs: a large customer goes past due, inventory builds, a reserve is imposed. Owner: FP&A. Output: stress table.

Worked example

Illustrative. Numbers are made up to show the arithmetic. They are not benchmarks, and no advance rate is stated because yours is in your agreement. Amounts are in $ millions.

Step 1: Eligible receivables

Check: 8.0 − 0.9 − 0.3 − 0.4 − 0.2 = 6.2.

Step 2: Eligible inventory

Check: 6.0 − 1.1 − 0.3 = 4.6.

Step 3: Base and availability

The base is [AR advance rate] x 6.2 plus [inventory advance rate] x 4.6, less lender reserves. Use your agreement's rates and the result is your base. For the example, suppose the lender-confirmed base on the certificate comes to $7.0M. The commitment is $10.0M, loans outstanding are $5.1M, and letters of credit are $0.4M.

Availability = Min(10.0, 7.0) − 5.1 − 0.4 = 1.5.

The base, not the commitment, is the binding limit, and it leaves $1.5M of headroom even though $10.0M was committed.

Step 4: The weekly roll

Suppose collections slip, one customer crosses the aging threshold, and loans rise to fund payroll and inventory. The base figures below are as computed under the same agreement each week:

Check week 4: Min(10.0, 6.2) = 6.2; 6.2 − 5.6 − 0.4 = 0.2.

Availability falls from $1.5M to $0.2M, while the commitment never changed. Total loans rose only $0.5M (5.1 to 5.6) while the base fell $0.8M (7.0 to 6.2). The base decline accounted for more of the lost headroom than the extra borrowing: $0.8M of the $1.3M fall came from the base.

What this tells the operator

• The weekly roll caught a squeeze that the commitment amount hid.
• A $0.9M past-due bucket is also an AR collections problem. Each dollar that crosses the threshold takes its full amount out of eligible receivables, then reduces the base by that dollar times the [AR advance rate].
• If the internal floor from step 5 had been $1.0M, the alarm would have gone off in week 2, with time to collect, defer payments or talk to the lender.

Templates

Definitions table (copy into a spreadsheet)

Eligible receivables roll

Availability report (one page)

Certificate checklist

1. Data cut date agrees to the reporting period in the agreement.
2. Subledgers tie to the general ledger.
3. Each ineligible test run and the report retained.
4. Lender reserves applied as notified.
5. Calculation reviewed by someone who did not prepare it.
6. Signed by an authorized officer as required.
7. Delivered by the due date, with required supporting reports.

Metrics and KPIs

Setting targets without invented benchmarks. Use method. Your floor comes from your forecast of the largest plausible weekly net outflow, plus any contractual minimum availability or trigger in the agreement. Your ineligible-rate target comes from your own best trailing period, and from decomposing the ineligibles into what is controllable (aging, disputes) and what is structural (concentration, location). Do not take a target from a lender presentation or a blog.

Common mistakes

1. Treating the commitment as liquidity. The binding limit is the lesser of commitment and base, less loans and letters of credit.
2. Relying on memory for definitions. Advance rates, thresholds and caps live in the agreement. Amendments change them. Keep the table and update it.
3. Not rebuilding the lender's number. An unexplained difference means one of you has misread a definition or a data field.
4. Collections run separately from the base. An invoice crossing an aging threshold removes it from the base. The collections team needs to see the base effect.
5. Ignoring cross-aging and concentration. One old invoice or one large customer can remove far more than its own value.
6. Inventory reserves booked without checking the base. A reserve change can move the base. Tell Treasury before the close.
7. Signing certificates from stale data. The certificate period and data cut must match the agreement.
8. No internal floor. If the only alarm is a lender trigger, you are warned too late.
9. Forecasting draws with no base line. A draw plan that exceeds forecast availability is not a plan.

AI prompt assistance

AI can structure analysis and draft documents. It cannot interpret your credit agreement authoritatively. Paste only the clauses you are entitled to share, redact where needed, and verify every output against the agreement and the ledger.

1. Extract definitions into a table.

Below is the text of the "Eligible Account" and "Eligible Inventory" definitions from our credit agreement. List each exclusion as a separate row with the exact wording, the data we would need to test it, and any threshold that is left as a bracketed term. Do not infer values that are not in the text.

Check: have counsel or the Controller read each row against the original. Do not rely on the summary.

2. Build an ineligibles report.

I will paste an AR aging by invoice with customer, invoice date, due date and amount. Using the thresholds I specify as [X days past due] and [cross-aging percent], flag invoices that are past-due ineligible and customers that are cross-aged ineligible. Show totals by category and by customer.

Check: recompute three customers by hand, and tie the gross total to the subledger.

3. Reconcile to the lender's certificate.

Here are our internal eligible receivables and eligible inventory, and here are the lender's figures. List every line where the figures differ, and suggest the most likely definitional or data explanations for me to check. Do not assume which party is correct.

Check: confirm each explanation against the agreement and the data before communicating with the lender.

Implementation guide

Governance: the CFO owns the trigger and signs the certificate where required, the Controller owns data integrity and the definitions table, Treasury or FP&A owns the weekly roll, and collections and operations own the controllable ineligibles. Counsel owns interpretations of the agreement. See the cash flow operating system playbook for how the roll fits a weekly cash rhythm.

If availability is already close to zero, move straight to liquidity crisis triage or the turnaround 30-60-90 playbook. Do not wait for the next certificate.

Downloadable assets

The definitions table, eligible receivables roll, availability report and certificate checklist above are designed to be copied into a spreadsheet. The 13-week cash flow builder can hold the availability line, and the covenant headroom calculator covers the covenant side if your agreement also has financial covenants.

Related resources

• Cash management hub: the full series on cash, treasury and lender topics.
• Working capital hub: receivables and inventory, the two assets that feed the base.
• Treasury policy for mid-market companies: where the internal floor and draw authority are written down.
• Covenant compliance headroom tracking: the covenant counterpart to borrowing base availability.
• Working capital playbook: improving the assets that make up the base.
• Forecasting cash receipts from AR: the collections forecast that drives eligible receivables.

Frequently asked questions

What is a borrowing base?

A borrowing base is the maximum amount a revolver lets you borrow, calculated from your eligible receivables and inventory after applying the advance rates and reserves in your credit agreement. Availability is then the lesser of the base and the commitment, less outstanding loans and letters of credit. Every term is defined in your agreement, so read it rather than assuming.

What is the difference between a borrowing base and availability?

The borrowing base is the maximum the collateral supports. Availability is what you can actually still draw: the lesser of the commitment and the base, less loans outstanding, letters of credit, and any block or minimum availability the agreement requires. Availability can be small while the base is large, if you have already borrowed most of it.

What makes a receivable ineligible?

Your credit agreement defines this, and common categories include invoices past due beyond a stated threshold, balances cross-aged because of a customer's other late invoices, concentration above a cap, contra and disputed items, and certain foreign or affiliate accounts. The exact list and thresholds differ by agreement, so build the list from your own document.

How often should you calculate the borrowing base?

Calculate it at least as often as your agreement requires a certificate, and ideally weekly once availability is tight. A weekly roll shows aging and inventory changes before the lender does. If the 13-week forecast contains draws, it should include an availability line that updates with the roll.

Can the lender change the borrowing base?

Often yes, within the terms of the agreement, for example by imposing or adjusting reserves, or through appraisal or field exam results that change eligibility or advance rates. Which actions are allowed, under what conditions, and with what notice are set by your agreement. Ask counsel to summarize those rights and ask your lender to confirm interpretations in writing.

How this works in a System of Performance

The borrowing base is built from receivables, inventory, collections promises and reserve decisions that sit in different systems and different teams. A Performis routine can take on a recurring job like this, with the scope and fit agreed with you: it works from the records your team supplies, prepares the work for your named reviewer, and keeps each approval on record. To see where your own collateral and cash headroom stand, bring it to us as a launch partner.