Price discrimination is the practice of charging different prices to different customers for the same product, based on differences in their willingness to pay rather than differences in cost. Despite the loaded word "discrimination," it is a standard, mostly lawful economic practice — student discounts, senior fares, and regional pricing are all everyday examples.
The three degrees
Economists classify price discrimination into three textbook degrees:
- First-degree (perfect) — charging each customer the maximum they are individually willing to pay. Rare in pure form; personalised online pricing approaches it.
- Second-degree — pricing by quantity or version: bulk discounts, tiered SaaS plans, "good/better/best" product lines. The customer self-selects.
- Third-degree — pricing by identifiable segment: student, senior, geographic, or time-based (matinee tickets, off-peak fares). The seller sorts customers into groups.
What makes it possible
For price discrimination to work, three conditions must hold: the seller must have some pricing power (not a perfectly competitive market), be able to segment customers by willingness to pay, and prevent arbitrage — stop low-price buyers from reselling to high-price buyers. The third condition is why first-class flights cannot be resold and why digital goods are region-locked.
Is it legal?
In most consumer retail contexts, price discrimination is legal. Charging different prices by segment, geography, or time is routine and lawful. The major exceptions:
- Robinson-Patman Act (US, B2B) — prohibits a seller from charging different prices to competing business buyers for goods of like grade and quality where it harms competition. This is a B2B wholesale concern, not a consumer-retail one, and is narrowly applied.
- Protected characteristics — pricing that varies by race, sex, religion, or other legally protected characteristics can violate anti-discrimination and civil-rights law. This is categorically different from segment-based economic pricing.
- Consumer-protection and transparency rules — some jurisdictions regulate personalised pricing disclosure, and the EU has tightened rules on personalised pricing transparency.
The careful reading: economic price discrimination by willingness-to-pay segment is generally fine; pricing by protected characteristic, or B2B pricing that harms competition, is not.
A concrete e-commerce example
A software store charges €99/year for individuals, €49 for verified students, and €299 per seat for enterprise. Same product, three prices, sorted by segment and willingness to pay — textbook third- and second-degree discrimination, and entirely lawful. Where it gets sensitive is dynamic personalised pricing: showing different prices to different individuals based on browsing behaviour or device, which raises both legal-transparency and trust concerns.
The competitive intelligence angle
Because price discrimination produces multiple prices for the same item across regions, segments, and channels, understanding a competitor's true pricing requires watching all of them, not just the headline figure. Competitor-price-monitoring tools like RivalScraper capture per-region and per-channel prices so you can see the rival's full discrimination structure rather than a single misleading number.
Personalised pricing and the trust line
The frontier — and the controversy — of price discrimination is personalised pricing: using browsing history, device, location, or inferred willingness-to-pay to show different individuals different prices for the same item at the same moment. Technically it edges toward first-degree discrimination and can be highly profitable, but it sits on a knife-edge of customer trust and regulation. Shoppers who discover they were charged more than someone else react with anger, not admiration, and several jurisdictions now require disclosure when a price has been personalised. The lesson most retailers draw is to discriminate by transparent segment (student, region, volume) rather than by opaque individual profile.
Versioning as friendly discrimination
The most customer-accepted form of price discrimination is versioning: offering deliberately different product tiers so buyers self-select by willingness to pay. Airline cabins, software editions, and "standard versus pro" hardware all let the price-insensitive pay more for extras while the price-sensitive get a cheaper option — and because the customer chooses, it reads as fair rather than as being singled out. Versioning captures much of the surplus that first-degree discrimination targets, without the trust cost of charging named individuals different prices.
The strategic takeaway
Price discrimination lets a seller capture more of the total consumer surplus by matching price to willingness to pay. It is one of the most powerful tools in pricing — but it lives inside legal guardrails (Robinson-Patman for B2B, protected characteristics, transparency rules) and trust constraints that punish discrimination customers perceive as unfair.