How to Spot a Fake Discount (The Law Explained)

"Was $200" — But Was It, Though?

You've seen the tag: a price crossed out, a lower price next to it, a percentage in red. "Was $200, now $99 — 50% off!" The discount itself is simple arithmetic — the Discount Calculator will check the maths on any percentage, stacked coupon, or reverse calculation in seconds. But there's a separate question the calculator can't answer for you: was $200 ever a real price, or a number invented specifically to make $99 look like a bargain?

This isn't a hypothetical concern. It's a specific, named practice — regulators call it deceptive reference pricing, and academics call it fictitious pricing — and multiple jurisdictions have built rules specifically to police it.

The US Rule: A "Bona Fide" Former Price

In the United States, the Federal Trade Commission's Guides Against Deceptive Pricing set out the baseline principle: if a business advertises a former price, that price has to be genuine — an actual price at which the article was openly and actively offered for sale, for a reasonably substantial period of time, in the recent, regular course of business. A price that was never really charged, or was charged only briefly as a setup for a "sale," doesn't qualify.

There's no single federal number attached to "reasonably substantial period" — it's judged case by case. But several states have gone further and written specific windows into law. Oregon requires that a former price have been the actual selling price for at least 30 days out of the prior 90. New Jersey's rule requires the greater of 28 days or twice the length of the sale itself, up to a 90-day cap. Different states, different specifics, same underlying idea: the "was" price needs a real track record, not just a number on a tag for a day.

The EU's 30-Day Rule, Explained

The European Union has the single clearest, most specific rule of the three. Since 2022, the Omnibus Directive (specifically Article 6a) has required that whenever a trader announces a price reduction, the reference price used to calculate that reduction must be the lowest price the trader charged for that product in the 30 days immediately before the reduction.

This closes a specific, well-documented loophole: a retailer selling an item at €80 for months, briefly bumping it to €100 for a few days, then announcing "20% off — now €80" as though a genuine discount had been applied. Under the 30-day rule, the true reference price is still €80 (the lowest price in the preceding 30 days), so that "20% off" claim would be false — the item hasn't actually gotten cheaper at all. Some EU member states have layered additional national rules on top of the directive, but the 30-day lowest-price principle is the harmonised baseline across the bloc.

The UK's Approach Under the CMA

The UK's Competition and Markets Authority (CMA) enforces broadly similar principles under general consumer protection law, prohibiting pricing claims that are false or likely to deceive the average consumer — including inflated reference prices used to exaggerate the size of a discount. The UK left the EU before the Omnibus Directive's specific 30-day figure took effect there, so the UK doesn't have that exact numeric rule, but the underlying prohibition on fabricated "was" prices is enforced through the UK's own consumer protection framework, and the CMA has actively investigated pricing practices at major retailers.

"Fictitious Pricing": What the Research Actually Found

Marketing researchers have a specific term for advertising an inflated reference price to exaggerate a discount: fictitious pricing (sometimes called deceptive reference pricing). This isn't just a legal category — it's been directly studied.

Academic work published in outlets including the Journal of Marketing has found that reference prices measurably shape how consumers perceive a deal, even among shoppers who say, when asked directly, that they're skeptical of "was/now" claims in general. In other words, people can simultaneously distrust sale pricing as a category and still respond to a specific inflated reference price exactly as the retailer intended. That gap between stated skepticism and actual behaviour is a large part of why regulators consider this worth policing directly rather than trusting consumers to see through it on their own.

Real Enforcement Cases

This isn't purely theoretical. Consumer advocacy groups and regulators in multiple countries have brought actions or opened investigations against large, well-known retailers over reference pricing practices — including cases involving Amazon's pricing displays in EU markets and UK retailers under CMA scrutiny. These cases matter for two reasons: first, they confirm the rules described above have real teeth, not just guidance documents nobody enforces; second, they show the issue isn't confined to disreputable small sellers — it's been a live compliance question for some of the largest retailers in the world.

None of this means most sales are fake. The overwhelming majority of discounts advertised by major retailers are genuine, and "was/now" pricing is a completely legitimate way to communicate real value. The regulations exist specifically to catch the minority of cases where it isn't.

How to Check a Discount Yourself

A few practical approaches, roughly in order of reliability:

Price-history tools. For online purchases, browser extensions and standalone tools that track a specific product's price over time (widely used for major marketplaces) show you the actual price history — the most direct way to verify whether a "was" price is real.

Be skeptical of round numbers right before a sale event. A reference price that's suspiciously round, and that only appeared in the days immediately before a big sale, is a weaker signal than a price with a long, stable history.

Check the maths regardless. Whether or not the reference price is genuine, you can always verify that the advertised percentage matches the advertised prices — a "30% off" claim should actually work out to 30%, and stacked "30% + 10%" offers should combine to the correct effective percentage, not a simple sum. The Discount Calculator's Reverse mode is built for exactly this: enter the original and sale price it's actually showing you, and it tells you the real percentage off, whether or not that original price itself is trustworthy.

Frequently Asked Questions

Is it illegal for a store to fake a "was" price?

In most of the US, UK, and EU, yes — advertising a former price that wasn't a genuine, bona fide price the item was actually offered at for a meaningful period is a form of deceptive pricing, enforceable by regulators like the FTC (US), the CMA (UK), and under the EU's Omnibus Directive. Enforcement varies by jurisdiction, but the general principle is consistent across all three.

What is the EU's 30-day rule for discounts?

Since 2022, the EU's Omnibus Directive (Article 6a) requires that any announced price reduction be compared against the lowest price the trader charged in the 30 days before the reduction — not an inflated price set just before a sale. If a retailer sold an item at €80 most of the time and briefly raised it to €100 right before announcing "20% off," the true comparison price under the rule is still €80.

Does the US have a similar rule to the EU's 30-day rule?

Not a single federal rule, but similar principles apply through FTC guidance and a patchwork of state laws. The FTC requires a former price to be genuine and offered for a reasonably substantial period. Some states codify a specific window — Oregon requires 30 days, New Jersey requires the higher of 28 days or twice the sale's duration, up to 90 days.

What is "fictitious pricing," in academic terms?

It's the term researchers use for advertising an artificially inflated reference price to make a discount look larger than it is. Studies, including research published in the Journal of Marketing, have found the practice measurably increases perceived value and purchase intent even among consumers who are generally skeptical of sale claims.

How can I check if a discount is genuine myself?

Price-history tracking tools show you what an item actually sold for over time — the most direct way to verify a "was" price. Be skeptical of round, suspiciously large "was" prices that appear only right before a sale. And regardless of the reference price's legitimacy, you can always verify the maths of the discount itself with a calculator.

Has a major retailer actually been penalized for this?

It's a recurring enforcement area. Regulators and consumer groups in multiple countries have brought actions or investigations against large retailers over reference pricing, including cases involving Amazon in EU markets and UK retailers under CMA scrutiny. This shows the rules are actively enforced against major companies, not just small operators.

Summary

"Was/now" pricing is one of the most common tools in retail, and most of it is completely legitimate. But it's also specifically regulated in the US, UK, and EU precisely because inflating the "was" number is such an effective way to make an ordinary price look like a bargain — effective enough that academic research has measured it working even on shoppers who say they don't trust sale pricing.

The rules differ by region — the EU's 30-day lowest-price requirement is the most specific and mechanical, while the US relies more on FTC guidance plus a patchwork of state laws, and the UK enforces similar principles through general consumer protection law. But the underlying idea is the same everywhere: a discount should be measured against a price that was actually real.

Whatever the reference price turns out to be, you can always verify the arithmetic of the deal itself — single discount, stacked coupons, or working backward from a sale price — with the Discount Calculator.

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This article summarises publicly available regulatory guidance and published research for general educational purposes and is not legal advice. Rules and enforcement practices can change; consult official regulator guidance (FTC, CMA, or your national consumer protection authority) for current requirements.