What is a borrowing base: the maximum a borrower may draw on a secured credit line, calculated as the value of eligible collateral multiplied by the advance rate for each collateral category
A borrowing base is the formula that sets how much a company can borrow on an asset-based credit facility at any moment. The lender takes the collateral the loan is secured on, strips out anything that does not qualify, and applies an advance rate to what remains. Eligible collateral times advance rates equals availability. The borrower can draw up to that number and no further.
It matters because the collateral behind the loan changes every day. Receivables get collected, inventory gets sold, new stock arrives. A fixed loan amount would run ahead of the assets or lag behind them. The borrowing base keeps the debt tied to what actually secures it. The term is used the same way in the US and the UK; in UK receivables finance the availability calculation works identically even when the facility is labelled invoice discounting or stock finance.
How a borrowing base works
- The collateral categories. Most facilities lend against accounts receivable and inventory. Some add equipment or real estate as fixed sub-lines. Each category gets its own advance rate.
- Eligibility rules. Not everything counts. Receivables past due beyond an agreed window, amounts owed by related parties, foreign debtors outside agreed countries, and concentrated exposure to a single customer are typically excluded. For inventory, work in progress, slow-moving stock and consigned goods are common exclusions.
- Advance rates. The percentage of eligible value the lender will fund. Receivables usually carry a higher rate than inventory because they convert to cash more predictably.
- The borrowing base certificate. The borrower reports the calculation to the lender on a set rhythm, monthly, weekly or even daily on larger facilities, signed by an officer of the company.
- Verification. The lender does not take the certificate on faith forever. A periodic equipment finance style check of hard assets, receivables testing and inventory counts confirm that the reported collateral exists and is worth what the certificate says.
How to calculate a borrowing base: a worked example
Take a distributor with 2,000,000 in receivables and 1,500,000 in inventory, with illustrative advance rates of 85 percent on receivables and 50 percent on inventory.
Of the receivables, 200,000 is more than 90 days past due and 100,000 is owed by an affiliate, so eligible receivables are 1,700,000. At 85 percent that supports 1,445,000. Of the inventory, 300,000 is slow-moving stock the agreement excludes, so eligible inventory is 1,200,000. At 50 percent that supports 600,000. The borrowing base is 2,045,000. If the company has already drawn 1,800,000, remaining availability is 245,000. Next month the numbers move, and so does the base.
What a borrowing base does not do, and the mistakes people make
It does not prove the collateral exists. The certificate is the borrower's own report. Fictitious receivables and phantom inventory flow straight into availability until a field examination or an inspection catches them.
It does not protect against double counting. An asset pledged to a second lender still shows up in the certificate unless the lender checks registries and filings. A photograph or a count confirms presence and condition; whether the asset is unencumbered is answered by lien and registry searches, not by the camera.
The common mistakes: accepting certificates for months without testing them against the ledger; letting eligibility definitions go stale while the customer base changes; funding against inventory nobody has physically seen since the facility closed; and treating a shrinking base as a reporting nuisance rather than the early warning it usually is. A borrowing base that falls faster than sales is one of the clearest distress signals in lease financing and asset-based lending alike.
Where the borrowing base goes
The certificate goes into the loan file and drives the availability the lender's system shows the borrower. Field examinations and collateral inspections test it; an audit trail of certificates, read in sequence, is the history of the collateral through the life of the loan. When the base and the findings on the ground disagree, the findings win and the base is adjusted.
Where a lender wants visual confirmation of the hard assets behind a base between full examinations, Venta Capture, a product of VentaVid, is one way to collect it. The borrower's own staff receive a link and follow guided steps in the mobile browser with no app: the stock, the identifiers, the location. What is recorded in the session arrives timestamped, located and digitally sealed on a case for the portfolio team to review, alongside, never instead of, the registry checks and receivables testing that confirm ownership and value. See Venta Capture.
