We Just Lost Our Biggest Customer. How Do We Finance the Business Now?

You just lost your biggest customer. It might be a large national retailer that decided to consolidate suppliers, a healthcare system that put out an RFP and picked someone cheaper, a big-box account that walked over a pricing dispute, or a long-standing distributor that got acquired and moved sourcing elsewhere. Whatever the story, the number is now painfully clear: 20%, 30%, sometimes 40% of your revenue is gone, and the ripple effects have started.

Your team is anxious. Your bank has heard the news. Your borrowing base was already tightening because that customer's receivables are aging into the ineligible bucket and their concentration in the base was doing real work for you. If nothing changes, your line of credit could look very different in 30-60 days than it does today. This piece is a plain-English playbook for what happens next and what to do in the first 60 days.

What Happens Inside Your Current Lender

The moment your lender learns about a major customer loss — from your monthly reporting, from a covenant compliance certificate, from an industry rumor, or from you telling them directly — a series of internal steps starts on their side. Understanding this helps you predict what will land in your inbox next.

The Borrowing Base Reacts First

If the lost customer's receivables were a meaningful portion of your eligible AR, availability drops immediately as their invoices collect out or age past eligibility. Concentration reserves that were sized around the largest customer may relax slightly for the next largest, but overall eligible AR is smaller. If the customer relationship involved specific-inventory buildups or long-cycle production, those inventory items may also stop qualifying as eligible if they cannot be repurposed to another buyer at reasonable value.

The Credit Officer Requests a Meeting

Expect a call within days. The credit officer wants to know the story, whether the loss is final or in dispute, what percentage of revenue and margin was tied to that customer, what the pipeline looks like to replace it, whether other customers are at risk, and what management is doing to reduce cost quickly. The lender is not looking to pull the line — they are trying to understand whether their credit thesis still holds.

Covenants Come Under Real Pressure

Fixed-charge coverage was likely tested against last twelve months, which included the lost customer's revenue. Once the loss flows through into trailing financials, the ratio drops. Depending on how the covenant was structured — LTM tested each month, quarterly, or on a rolling basis — a covenant breach could arrive anywhere from immediately to 6-9 months out. If there is a minimum EBITDA floor, that is often the first tripwire.

The Lender May Layer On Reserves

Availability blocks, additional dilution reserves, or lower advance rates may show up in the next borrowing base certificate review. These are discretionary reserves the credit agreement usually allows the lender to impose in response to a materially adverse event. They are not final — they are a signal that the lender wants a fresh look and often a fresh conversation before things go further.

The Lender Assesses Exit

Depending on the lender's portfolio strategy, the loss may be the moment they decide this credit no longer fits their box. Community banks and regional banks especially may quietly begin planning a non-renewal or an amend-and-extend on tighter terms rather than a full workout. This is why a customer loss is often the trigger event for a refinancing conversation, even before a formal notice arrives.

What Your Options Actually Look Like

The customer loss changes what financing structures make sense. The old cash-flow story is under pressure. The collateral story is intact but smaller. Here is the honest landscape.

Stay With the Incumbent — Renegotiate

If the incumbent is willing to work through the loss, this is often the fastest path. It usually involves resetting covenants around a new realistic forecast, accepting a modified borrowing base (lower advance rates or new reserves for a period), and sometimes providing a fresh capital contribution or additional guaranty. This works when the loss is a one-time event, the underlying business is otherwise healthy, and the incumbent has appetite for the credit going forward. It stops working when the incumbent has decided you no longer fit their portfolio.

Refinance Into a Specialty ABL Revolver

This is the most common outcome when the customer loss materially changes the credit profile. A specialty finance ABL lender — non-bank, private credit, or a bank ABL group with a wider credit box — underwrites on collateral quality rather than headline EBITDA. If your remaining receivables and inventory support the availability you actually need, a specialty lender can often step in where a traditional bank has decided to exit. Pricing is higher (typically 300-600 basis points wider than a bank facility), but the credit box is wider and the underwriting is faster on the collateral side. The trade-off is real, but for many borrowers post-customer-loss, it is the only path that keeps operations funded without an equity dilution or a distressed workout.

Bridge to a Recovery With a Short-Term Overadvance

If you have a credible plan to replace the lost revenue within 6-12 months — a signed replacement contract in hand, a pipeline of near-final proposals, or a strong sales team that has done this before — a short-term overadvance can bridge the gap. This is usually structured with the incumbent or a specialty lender, sized modestly (5-15% above formula availability), and scheduled to step down over a defined period as replacement business comes on. Overadvances require lender confidence in the recovery plan; without a credible plan, they are not on the table.

Add a Subordinated Tranche

Where the borrowing base has meaningfully contracted and cannot fund the operating need, a subordinated debt tranche (from a mezzanine lender or a private credit fund) can fill the gap without disturbing the senior ABL revolver. Pricing is much higher — often 12-15%+ cash pay plus PIK — but the tranche is patient, sized against enterprise value rather than collateral, and can carry a company through a recovery period. This is typically only sensible for larger middle-market situations where the equity story is intact.

Equity Infusion or Cost Restructuring

If the customer loss is severe enough that no debt structure can bridge the gap, the honest answer may be an equity contribution from existing owners or a new investor, combined with a cost restructuring that resizes the business to its post-loss revenue level. This is not a financing conversation as much as it is a strategic conversation, and getting an honest read from an experienced advisor early prevents borrowing base structures that eventually fail.

The 60-Day Action Plan

The first 60 days are the window where you have the most leverage. Waiting until the incumbent formally acts — with a reservation of rights letter, a demand for a fresh field exam, or a non-renewal notice — puts you in a reactive position with less time and fewer options. Move first.

Days 1-14: Assemble the Truth

• Model the post-loss business honestly. What is the pro forma revenue, gross margin, operating expense, and EBITDA over the next 12 months in a base case and a downside case?
• Rebuild the borrowing base as it will look 60 and 120 days from now, when the lost customer's receivables have fully aged out.
• Identify covenants that are at risk and the specific quarter or month they trip.
• List the cost actions the company can take within 90 days and quantify them.
• Prepare an honest one-page narrative: what happened, why, what the pipeline looks like, what actions are underway.

Days 15-30: Talk to the Incumbent — and Start Parallel Conversations

• Meet with the incumbent lender proactively. Bring the model, the narrative, the plan. Ask directly whether they want to work through this or whether you should plan for a refinancing.
• In parallel, begin conversations with 3-5 specialty ABL lenders whose credit box actually fits your post-loss profile. Do not wait for the incumbent's answer. Time is the variable that matters most.
• Update legal counsel and accountants so they are ready if timelines move quickly.

Days 31-45: Get Term Sheets on the Table

• Push specialty lenders for indicative term sheets. Compare them on advance rates, reserves, pricing, covenants, closing costs, and exit terms — not just headline rate.
• If the incumbent is willing to restructure, get their restructured terms in writing so you can compare against alternatives.
• Choose the path. Signal clearly to the losers so relationships stay intact.

Days 46-60: Execute

• Field exam and appraisals with the chosen lender.
• Documentation and legal review.
• Payoff coordination with the incumbent.
• Fund and operate the new facility.

What Lenders Will Ask About the Remaining Business

Any new lender — or the incumbent in a restructuring — will drill on the same set of questions:

• Concentration in the remaining book. After the loss, what does customer diversification look like? Is any other customer over 15-20% of the base?
• Pipeline quality. How much replacement revenue is contracted versus in-progress versus targeted?
• Margin profile. Did the lost customer have unusually high or low margins? What does gross margin look like without them?
• Cost actions. What is being cut, when, and how much does that save?
• Owner and management commitment. Is the equity willing to contribute if needed? Is the management team intact?
• Reason for loss. Was this a competitive loss, a pricing dispute, a customer M&A event, a service issue, or something structural about the industry? The reason shapes how the lender views the remaining book.

Common Mistakes in the First 60 Days

• Hoping the incumbent will figure it out. They may. But hope is not a strategy, and by the time you know they will not, you are 90 days closer to a non-renewal.
• Overpromising on the replacement pipeline. Lenders read pipelines skeptically. Padding the pipeline to make the borrowing base story look better is one of the fastest ways to lose credibility with the new lender.
• Cutting costs too slowly. If the business needs to resize, do it in the first 60 days. Announcing cost actions in month five while asking a new lender to underwrite month one is a bad look.
• Waiting to talk to specialty lenders. Specialty ABL lenders can move faster than banks, but they still need a field exam and appraisals. Starting conversations in month one is normal. Starting them in month four is late.
• Going with a mass-distribution shop. Under time pressure, some borrowers respond to inbound calls from loan-shopping operations that send the same package to fifty lenders. This burns lender relationships and produces worse terms than a targeted process with two or three lenders that actually fit the credit.

How DCE Advises

Don Clarke's four decades in asset-based lending — SFNet Hall of Fame 2021, Lifetime Achievement Award, author of Asset Based Lending Disciplines (the first ABL textbook), and trainer of more than 5,000 professionals at GE Capital, JP Morgan Chase, Lloyds, and Barclays — has covered thousands of post-customer-loss situations. On the borrower side, we help management triage the loss honestly, rebuild the borrowing base under the new reality, identify the two or three specialty ABL lenders whose credit box actually fits your post-loss profile, and prepare a package that a credit committee can approve. We do not blast your deal to fifty lenders. We advise; the lender underwrites.

For lender-side questions — how credit committees evaluate post-customer-loss credits, what field-exam findings matter most, and how to structure workout amendments — our sister firm ABLC (ablc.net) serves lenders with due diligence, field-exam, and training services.

Related Reading

• Your Bank Won't Renew Your Line of Credit. Here's What to Do Next.
• Customer Concentration in ABL: Limits, Reserves, and Debtor Quality
• Asset-Based Lending for Turnaround and Distressed Companies