Robinson-Patman Act: Relevance for Australian Businesses in 2026

Enacted in 1936, the Robinson-Patman Act was designed to prevent large US suppliers from using their market power to offer different prices to different buyers, especially when those price differences could harm competition. The Act makes it illegal to discriminate in price between different purchasers of commodities of like grade and quality, where the effect may be to substantially lessen competition or create a monopoly.

• Key Focus: Prevents price discrimination that threatens competition.

• Application: Primarily targets suppliers and manufacturers.

• Modern Impact: Increasingly relevant as digital platforms and global supply chains change the way businesses buy and sell.

While the Act doesn’t apply directly in Australia, its principles are echoed in the Competition and Consumer Act 2010 (CCA) and the Australian Competition and Consumer Commission’s (ACCC) enforcement priorities.

Australian regulators have long grappled with the risks of price discrimination, especially as large retailers and digital platforms gain market share. In 2026, the ACCC has signalled a tougher stance on ‘unfair trading practices’ and is closely watching how price differences affect smaller businesses.

• Digital Marketplaces: The ACCC’s 2026 Digital Platform Services Inquiry is investigating how platforms set prices for different sellers and buyers, echoing Robinson-Patman’s concerns over fair treatment.

• Retail Power: Recent reforms target supermarket supply chains, with new rules requiring transparent and fair pricing for suppliers—directly influenced by international precedents.

• Small Business Protections: In 2026, expanded unfair contract terms laws and potential new ‘unfair trading practices’ legislation aim to give SMEs more power when negotiating with large buyers or suppliers.

These moves reflect a growing awareness that unchecked price discrimination can stifle innovation and competition, especially in sectors like groceries, construction materials, and digital advertising.

Recent cases highlight how Robinson-Patman-style issues are playing out in Australia:

• Supermarkets and Suppliers: In early 2026, the ACCC launched an investigation into major supermarket chains allegedly offering better prices to large suppliers while squeezing smaller producers. The case is testing the boundaries of what constitutes ‘unfair’ price differences under Australian law.

• Online Advertising: Digital ad platforms have been accused of offering bulk discounts to high-volume advertisers, putting small businesses at a disadvantage. New draft guidelines propose stricter transparency requirements for platform pricing.

• Energy and Solar: As the push for household solar grows, installers have reported inconsistent pricing from wholesalers, depending on order size and geographic region. This has prompted calls for new industry codes to ensure fair access for smaller operators.

Each of these scenarios underscores the ongoing relevance of the Robinson-Patman Act’s core principle: fair competition depends on a level playing field.

Whether you’re a supplier, retailer, or digital platform, 2026 is a year to review your pricing policies. Here’s what to consider:

• Audit your supply contracts for consistency and transparency.

• Stay updated on ACCC guidelines and sector-specific codes.

• Be prepared to justify price differences with clear, objective criteria (e.g., volume discounts, logistics costs).

• Engage with industry associations to advocate for practical, fair competition rules.

With regulatory scrutiny on the rise, proactive compliance isn’t just smart—it’s essential for protecting your reputation and bottom line.