What is MAP (minimum advertised price) — and is it legal?

US-market practice. Everything in this article describes United States practice. Resale price maintenance is per-se illegal in the UK and EU, and MAP-style enforcement does not transfer there. This is general information, not legal advice — have counsel review your policy.

What is a minimum advertised price (MAP) policy?

A MAP policy is a document a brand publishes, on its own, that says: here is the lowest price at which our products may be advertised, and here is what we will do — as a matter of our own choice of trading partners — if a seller advertises below it. Three words in that sentence carry all the weight.

Advertised. MAP governs the price a seller displays — on a product page, in a Google Shopping result, in an email. It does not govern the price a buyer ultimately pays at checkout. A seller who shows your MAP on the listing and applies a discount in the cart is, under most policies, compliant. Policies that try to reach the actual selling price are no longer MAP policies; they are resale price maintenance, which is a different legal animal entirely (more below).

Unilateral. Nobody signs a MAP policy. You announce it, you apply it, and sellers decide whether to follow it. The moment you negotiate it, trade signatures for supply, or pay sellers for compliance, you have started building an agreement about price — and agreements about resale prices are analyzed under a much harsher framework than unilateral conduct.

Choice. The only lever a MAP policy pulls is the one every supplier already holds: the right to decide whom it does business with. The consequence for advertising below MAP is not damages or an injunction — it is losing authorized status, allocation, or supply.

Is MAP legal in the United States?

The footing comes from United States v. Colgate & Co., 250 U.S. 300 (1919). The Supreme Court held that, absent monopoly intent, the Sherman Act does not prevent a manufacturer from announcing in advance the prices at which its goods may be resold and refusing to deal with sellers who don’t conform. The critical fact in Colgatewas the absence of any agreement: the manufacturer announced a policy and exercised its own choice of trading partners, nothing more. That structure — announce, monitor, choose — is what people mean by the “Colgate doctrine,” and it is the entire legal architecture of MAP.

The FTC’s plain-English guidance on manufacturer-imposed requirements says the same thing: if a manufacturer, on its own, adopts a policy regarding a desired level of prices, the law allows it to deal only with retailers who follow that policy, and to stop dealing with those who don’t.

Two boundaries are worth knowing. First, the protection is for unilateral conduct — coordinating with competing manufacturers, or letting a group of retailers pressure you into adopting restraints, takes you outside it. Second, MAP programs can overreach even on the advertising side: in 2000 the FTC forced the five largest CD distributors to abandon their MAP programs after they tied cooperative advertising funds to MAP compliance across all advertising — including ads the retailers paid for themselves and signs inside their own stores. A floor on advertised prices is defensible; paying retailers to never communicate a discount anywhere is how a MAP program becomes an FTC case.

How is MAP different from resale price maintenance (RPM)?

The two get conflated constantly, including by MAP vendors. The distinction has two axes:

• What is controlled. MAP restricts the advertised price. RPM controls the actual selling price — the number the buyer pays.
• How it is imposed. A unilateral policy is announced and enforced through choice of trading partners. An RPM agreement — anything sellers sign, agree to, or are paid to follow — is a vertical price restraint under Section 1 of the Sherman Act.

Since Leegin Creative Leather Products, Inc. v. PSKS, Inc., 551 U.S. 877 (2007), RPM agreements are no longer automatically unlawful under federal law — Leegin overruled the 96-year-old Dr. Milesper-se rule and moved them to case-by-case “rule of reason” analysis. But that is federal law only. Maryland amended its antitrust act in 2009 to make minimum RPM agreements per se illegal under state law, and California courts have long read the Cartwright Act to treat RPM as per se unlawful. A brand that drifts from “unilateral MAP policy” into “signed pricing agreement” hasn’t made its program stronger — it has traded a well-protected structure for a litigated one.

Why is MAP treated differently in the UK and EU?

In the UK and EU, resale price maintenance is a “hardcore” restriction — the category of conduct presumed unlawful. Article 4(a) of the EU’s Vertical Block Exemption Regulation (2022/720) strips the exemption from any agreement that imposes fixed or minimum resale prices, and the UK’s post-Brexit regime mirrors that position. This is not a theoretical risk: the UK’s Competition and Markets Authority fined Fender £4.5 million and Casio £3.7 million for requiring instruments to be sold at or above minimum prices online — and in the Casio matter the CMA specifically noted the use of price-monitoring software to police compliance in real time. The same tooling that is ordinary practice in the US is treated as evidence of the infringement there.

The practical rule for brands selling on both sides of the Atlantic: run MAP as a US program, on US sources, and keep UK/EU pricing questions with competition counsel.

Who can actually violate your MAP policy?

Fewer parties than most brands assume. A below-MAP price is only meaningfully a “violation” when the seller is the kind of party your policy can reach:

• Authorized resellers advertising new product — the core case. They received the policy; the response is the escalation ladder and, ultimately, your choice about supplying them.
• Unauthorized sellers of new product— a different problem wearing the same symptom. They never received your policy and never agreed to anything, so “you violated our policy” framing is wrong on arrival. Their below-MAP listing is evidence of a distribution leak, and the productive response is tracing how inventory reaches them. We wrote a separate playbook on that split.
• Secondhand sellers — never. Under the first-sale doctrine, a lawful owner of a genuine product may resell it at any price (see Champion Spark Plug Co. v. Sanders, 331 U.S. 125 (1947) and its line). A used unit on eBay is outside MAP scope entirely — it can’t comply and it can’t violate.

One more party who won’t enforce your floor: the marketplace itself. Amazon treats MAP as a private matter between brands and sellers and will not remove a listing for advertising below your MAP. Enforcement is the brand’s job, with the brand’s own levers.

What makes a MAP policy enforceable in practice?

“Enforceable” for a unilateral policy means: the structure stays unilateral, and the application stays uniform. Selective enforcement — leaning on small sellers while your biggest retailer advertises below MAP untouched — is how brands erode the very doctrine the policy stands on. The working loop looks like this:

1. Announce. Publish the policy with an effective date, the covered products, and the consequences. Distribute it to authorized sellers.
2. Monitor. Observe advertised prices on the channels where your buyers actually shop, on a cadence (daily, for marketplaces) that makes your letters current rather than stale.
3. Document. Capture the listing, the observed price, and a timestamped screenshot at observation time. Your future letters are only as strong as this record.
4. Respond uniformly. Same ladder, same timing, same consequence for every seller in the same position — and a recorded reason whenever you exempt one.

How MAP Protector handles this

We built MAP Protector around exactly the boundaries this article describes. It monitors advertised prices — never cart prices — across four US sources (Amazon, Walmart, eBay, Google Shopping) daily, and captures a screenshot plus price history for every violation, so the record exists before any letter does. Secondhand and used listings are structurally excluded: the scanner classifies listing condition and a used eBay listing can never create a violation, by code rather than by operator discipline. Enforcement is opt-in — escalation funnels ship disabled, enabling one is an audited human action, and the seeded letters follow the Colgate framing rules (a built-in lint actually rejects template edits that claim illegality or breach of contract). Setup is a CSV import that takes about 15 minutes, and the whole module is included in the one $199/mo plan — no quote call.

Frequently asked questions

If unenforced MAP is quietly resetting your street price, the fastest way to see the scale of it is to import your price list and let tomorrow’s scan count the below-MAP listings for you — details on the MAP monitoring page.