Protect your acquisition by auditing supplier contracts, customer concentration, inventory health, and working capital before you close on any wholesale distribution business.
Buying a wholesale distribution business requires a fundamentally different due diligence lens than acquiring a service business or a SaaS company. The value in a distributor is embedded in supplier relationships, exclusive agreements, customer reorder velocity, and logistics infrastructure — not intellectual property or recurring software contracts. A single non-transferable supplier agreement or a customer concentration problem discovered post-close can destroy the thesis entirely. This checklist walks buyers through the five critical due diligence categories specific to lower middle market distributors in the $1M–$5M revenue range, helping you verify what you are actually buying before you wire a dollar.
The durability of a distributor's supplier relationships — especially any exclusive or preferred distributor agreements — is often the single most important value driver in the deal. Verify every contract before closing.
Obtain and review all supplier contracts, including remaining terms, renewal clauses, and termination provisions.
Agreements expiring within 12 months of close expose you to immediate revenue and margin risk.
Red flag: Supplier contracts are verbal, undocumented, or governed by handshake relationships with the exiting owner.
Confirm in writing that all key supplier agreements are transferable to a new owner entity.
Non-transferable agreements can void exclusivity rights the moment the business changes hands.
Red flag: Supplier requires right of first refusal or consent to assign that has not been formally obtained.
Identify all exclusive or preferred distributor designations and the geographic or product scope they cover.
Exclusivity creates a revenue moat; loss of it eliminates the competitive barrier you are paying for.
Red flag: Exclusivity is informal, unwritten, or subject to annual volume thresholds the business is barely meeting.
Review supplier concentration — what percentage of COGS flows through the top three suppliers.
Over-reliance on one or two suppliers creates catastrophic risk if those relationships are disrupted.
Red flag: A single supplier represents more than 50% of total cost of goods with no documented contract in place.
Distributor revenue is only as durable as the customers generating it. Analyze reorder history, contract status, and concentration before accepting any seller revenue representations at face value.
Request a full customer revenue report by account for the trailing 36 months.
Three years of data reveals true reorder patterns, seasonal swings, and customer churn rates.
Red flag: Seller cannot produce account-level revenue data or provides only summary financials without customer detail.
Calculate the revenue percentage attributed to the top 5 customers individually and as a group.
Any single customer above 20–25% of revenue creates unacceptable concentration risk for most buyers and lenders.
Red flag: One or two accounts represent more than 30% of total revenue with no long-term purchase contracts in place.
Review all customer contracts, master service agreements, and documented purchase order histories.
Contractual revenue is fundamentally more valuable and financeable than relationship-dependent repeat purchasing.
Red flag: No formal customer contracts exist and repeat purchasing is driven entirely by the owner's personal relationships.
Interview the top 3–5 customers directly, with seller consent, to gauge relationship transferability.
Customer willingness to continue purchasing post-close is more predictive than any contract on paper.
Red flag: Key customers express loyalty to the exiting owner personally and signal uncertainty about continuing under new ownership.
Distribution businesses are capital-intensive. Inventory and receivables consume cash constantly. Validate what is actually on the shelves, what it is worth, and how long it takes to convert to cash.
Conduct or commission an independent physical inventory count and reconcile to the seller's balance sheet.
Inflated inventory values directly overstate the business's assets and distort working capital calculations.
Red flag: Seller resists a pre-close inventory audit or significant discrepancies exist between records and physical count.
Analyze inventory turnover ratios by SKU and product category over the trailing 24 months.
Slow-moving inventory ties up working capital and may require costly write-downs shortly after acquisition.
Red flag: Turnover ratios below industry norms or more than 15–20% of inventory flagged as slow-moving or obsolete.
Map the full working capital cycle: days inventory outstanding, days sales outstanding, and days payable outstanding.
The gap between cash outflows for inventory and cash inflows from customers determines your ongoing capital need.
Red flag: DSO exceeds 60 days on average or a material portion of receivables are over 90 days with no reserve established.
Negotiate a normalized working capital peg and define what inventory quality is included in the purchase price.
Without a defined peg, sellers can drain receivables or inflate inventory before close at buyer's expense.
Red flag: Seller refuses to define a working capital target or insists on including aged or obsolete inventory at full book value.
Distribution margins are thin by nature. Understanding profitability by product line, customer, and channel — not just at the blended level — is essential to validating the business's real earning power.
Obtain three years of P&L statements and reconcile gross margin by product line and customer segment.
Blended margins can mask deeply unprofitable product lines or customers subsidized by high-margin accounts.
Red flag: Seller can only provide blended margin data with no ability to break out profitability by product or customer.
Reconstruct SDE or EBITDA with all legitimate owner add-backs clearly documented and independently verifiable.
Add-backs that cannot be verified inflate valuation and create lender scrutiny during SBA underwriting.
Red flag: Add-backs exceed 20–25% of reported net income or include non-recurring items that appear suspiciously regular.
Identify revenue trends by year and quarter, separating volume growth from price increases or one-time sales.
Price-driven revenue growth is far more fragile than volume growth and does not support a forward multiple.
Red flag: Revenue growth is entirely attributable to one large customer or a one-time bulk order unlikely to repeat.
Engage a quality of earnings provider to validate normalized EBITDA and assess accounting policy consistency.
QofE findings catch revenue recognition issues or expense timing manipulation before you are committed to close.
Red flag: Seller has changed accounting methods, revenue recognition policies, or expense classifications in the last two years.
The physical and operational backbone of the distribution business — warehouse, fulfillment systems, and team — must be capable of functioning under new ownership without the seller present.
Inspect all warehouse facilities, assess lease terms and renewal options, and verify equipment condition.
Facility lease expiring shortly after close or deferred equipment maintenance creates immediate capital exposure.
Red flag: Warehouse lease expires within 18 months with no renewal option or landlord relationship is tied to the seller personally.
Evaluate the fulfillment technology stack including order management, inventory software, and carrier integrations.
Manual or outdated systems create operational fragility and limit scalability under new ownership.
Red flag: No formal order management or inventory tracking system exists beyond spreadsheets or the seller's institutional memory.
Assess the management team depth and identify which operational functions are owner-dependent.
If the owner manages key vendor relationships and customer accounts directly, transition risk is extremely high.
Red flag: No second-level management exists and all supplier and customer communications flow exclusively through the owner.
Review documented standard operating procedures for receiving, fulfillment, returns, and vendor management.
Documented processes signal operational maturity and reduce knowledge transfer risk during ownership transition.
Red flag: No written SOPs exist for core operations and the seller's response is that everything is in their head.
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Request the original supplier contract and identify the assignment clause. Then contact the supplier directly — with seller consent — to obtain written confirmation that the agreement will transfer to a new owner entity under the same terms. Do not close without this confirmation in writing. Many distribution deals collapse post-close when buyers discover exclusivity was never formally transferable.
Most SBA lenders and experienced distribution buyers use a 20–25% threshold for any single customer as a maximum comfort level. Anything above that requires either a price reduction, an earnout tied to that customer's retention, or a contractual commitment from the customer acknowledging the ownership change. Concentration below 15% per customer is ideal and meaningfully reduces deal risk for both the buyer and financing sources.
Working capital in a distribution business is not a rounding error — it is often the largest variable in the deal. You need to negotiate a normalized working capital peg based on 12 months of historical data, define exactly what inventory quality is included at close, and budget for additional capital above the purchase price to fund operations. Buyers who underestimate working capital requirements frequently face cash crunches within the first 90 days of ownership.
SBA lenders will conduct their own underwriting review, but you should not rely on that as a substitute for independent due diligence. Commission a quality of earnings analysis to normalize EBITDA, obtain an independent inventory appraisal if inventory is being included in the loan collateral, and ensure all supplier agreements are transferable before the loan is approved. SBA loans are assumable at the lender's discretion, and lenders will scrutinize customer concentration and supplier contract durability as part of their own credit analysis.
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