Imagine you run a corner liquor store. You call up your regional distributor and order a truckload of a popular whiskey brand. Down the road, a national chain orders the exact same truckload from the exact same distributor — and pays 20% less per bottle. Not because they negotiated harder. Not because they're more efficient to serve. Just because they're big.
For nearly 50 years, federal antitrust regulators looked the other way when this happened. That's changing. In December 2024, the Federal Trade Commission sued Southern Glazer's Wine and Spirits — the largest wine and spirits distributor in the country — for allegedly doing exactly this to thousands of small, independent liquor stores and restaurants. A federal judge let the case move forward in 2025, and by mid-2026 the two sides were negotiating a settlement. Along the way, the case has become the most closely watched revival of a Depression-era law that most business owners have never heard of: the Robinson-Patman Act.
If you buy inventory from any supplier who also sells to bigger competitors — and almost every small retailer does — this law was written specifically to protect you. Here's what it actually says, why it went dormant, why it's roaring back, and what you should be doing about it right now.
What the Robinson-Patman Act Actually Prohibits
Passed in 1936, the Robinson-Patman Act amended the Clayton Act to bar sellers from charging different prices to different buyers for the same "commodity" (physical goods, not services) when the price gap could hurt competition. Congress passed it explicitly to stop chain stores from using their buying power to squeeze out "mom and pop" shops — the same dynamic playing out with e-commerce giants and warehouse clubs today.
The law also covers indirect discrimination through "allowances" — money or services a supplier gives one customer but not another for things like:
- Co-op advertising and promotional funds
- In-store displays, signage, and demonstrations
- Special packaging or warehousing arrangements
- Rebates and credit terms
If your supplier funds a competitor's in-store tasting events or splits their marketing budget, but won't extend the same deal to you at a comparable volume, that can be a Robinson-Patman problem too — not just the sticker price on the invoice.
Important limits: the law isn't a flat ban on volume discounts. It has built-in defenses. A price difference is legal if it genuinely reflects the seller's different costs to manufacture, sell, or deliver to that buyer (bulk shipping efficiencies are a classic example), or if the seller was matching a competitor's price in good faith. The dispute in practice is almost always about whether a "volume discount" is really a cost-based efficiency — or just a reward for being big.
Why the Law Went Quiet for Decades
The Robinson-Patman Act didn't disappear from the books; it disappeared from enforcement priorities. A 1977 Department of Justice report argued that volume discounts mostly reflected real efficiencies and benefited consumers through lower prices, and antitrust thinking in the following decades shifted heavily toward a "consumer welfare" framework that treated cheaper prices as inherently good — even if they came at the expense of smaller rivals. By the 1990s, both government and private Robinson-Patman lawsuits had nearly vanished.
The practical result: for a generation, suppliers negotiated deeper and deeper volume tiers with the biggest chains, and small independent retailers had little legal recourse even when they suspected — or knew — they were paying substantially more for the same goods.
The Case That Changed the Conversation
The FTC's complaint against Southern Glazer's (case No. 8:24-cv-02684, filed in the Central District of California) alleges the distributor built tiered volume-discount schedules where only the largest retail chains could realistically hit the top discount thresholds, and structured how it counted "volume" in ways that further tilted the scale toward big buyers — while small, independent wine and spirits shops paid noticeably more for identical products.
In April 2025, the district court denied Southern Glazer's motion to dismiss, allowing the case to proceed toward discovery. That's a meaningful signal — it's the first time in decades a Robinson-Patman case brought by the FTC has cleared this hurdle — but legal analysts have cautioned it's a low procedural bar, not a ruling on the merits. Critics of the case have also pointed out real tension in the FTC's legal theory: proving harm requires showing the favored and disfavored buyers actually compete in the same market, and the complaint has been criticized for not clearly alleging that consumers ultimately paid more or had less choice as a result.
By mid-2026, the two sides had reached a tentative agreement in principle and asked the court to pause proceedings while they finalize a settlement — a sign the FTC intended to extract real commitments rather than litigate the underlying legal theory all the way to trial.
Whatever the final outcome, the case has already done its job as a warning shot: after decades of dormancy, the FTC signaled it's willing to bring Robinson-Patman cases again, and plaintiffs' antitrust lawyers are watching closely for the next target.
What This Means If You're a Small Retailer
You almost certainly can't get a court to rule your supplier's pricing illegal just by reading this article — that takes real legal analysis and, often, discovery to even see the comparison data. But you can start protecting yourself today:
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Get every quote and discount schedule in writing. Verbal understandings and side-deal rebates are exactly what makes discriminatory pricing hard to prove. If a discount is structured as a "volume tier," ask for the written schedule.
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Know what "identical commodity" actually means. The law applies to the same goods sold to competing buyers — not different SKUs, private labels, or genuinely different service levels. If your supplier can point to a real cost or product difference, that's a legitimate defense, not a smoking gun.
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Watch for promotional allowances, not just unit price. Co-op ad money, slotting fees, and display allowances are covered by the Act too. A supplier who funds a big-box competitor's marketing but not yours, at comparable purchase volumes, may be discriminating in a way that doesn't show up on your invoice at all.
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Talk to other small buyers in your trade. Discriminatory pricing is invisible until you compare notes. Trade associations, buying groups, and even informal owner networks are often how these patterns first surface — which is exactly how the Southern Glazer's case and similar complaints have historically come to light.
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Keep clean, comparable records of what you actually pay. This is where solid bookkeeping does real work beyond tax season. If you ever need to make the case that you're being charged more for identical goods, you need your own purchase history organized clearly enough to hand to a lawyer — invoice by invoice, SKU by SKU, discount by discount.
Why Clean Books Matter Here, Not Just at Tax Time
Most small business owners think of bookkeeping as a compliance chore — something you do for the IRS. But a case like this is a reminder that your purchase ledger is also evidence. If you can't quickly pull up exactly what you paid per unit for a given product across the last two years, you can't spot a discriminatory pricing pattern even if it's happening right in front of you, and you definitely can't hand a credible record to a lawyer if it ever comes to that.
This is one of the quieter arguments for keeping your accounts in a transparent, auditable format rather than buried in disconnected invoices and a point-of-sale system that only shows aggregated totals. When every purchase is a plain-text ledger entry — vendor, SKU, unit cost, discount applied, date — comparing your costs against public price lists, competitor receipts, or a trade association's benchmarking data becomes a query, not an archaeology project.
Keep Your Purchase Records Ready for Scrutiny
Whether the issue is a supplier pricing dispute, a tax audit, or just understanding your true margins, the businesses that come out ahead are the ones whose financial records are clear and complete before they need them. Beancount.io offers plain-text accounting that gives you full transparency and control over every transaction — no black boxes, no vendor lock-in, and no digging through years of invoices to answer a simple question about what you actually paid. Get started for free and see why small business owners are switching to plain-text accounting.