Dumping in Ecommerce: The Hidden Problem Behind Low Prices
A competitor is selling your product for less than it costs you to buy it. Before you match that price, it pays to know whether it is a passing offer or a practice that will cost you money.
Dumping in ecommerce means persistently selling a product below cost to push other sellers out and take over the category. Three traits set it apart from a legitimate offer: it lasts over time, it aims to drive out rivals rather than clear stock or support a campaign, and it forces everyone else to match prices that do not cover their costs.
Key takeaways
- Not every low price is dumping: clearance sales, promotions and sellers with lower costs explain many aggressive prices.
- In legal terms, dumping belongs to international trade (imports from outside the EU). Between sellers inside a country such as Spain, what is examined is selling at a loss and predatory pricing.
- To know whether a price is below cost, you have to strip out VAT, the marketplace fee and shipping, not just look at the price tag.
- An unusual price is confirmed with price history: a one-off drop is an offer; a sustained drop, or one that repeats in cycles, is a pattern.
- The most profitable response is usually a minimum price of your own that you never cross, not a price war.
What dumping in ecommerce is and why it hits your margins
Dumping is traditionally associated with international trade, but in ecommerce the term is used more loosely for this: selling products below their real cost in order to displace other competitors and dominate a category. The seller accepts losing money for a while in exchange for keeping the sales once the others give up.
A one-off markdown or a seasonal offer is not dumping. When people talk about dumping, three elements usually coincide:
- Persistence: abnormally low prices over a long period, not just for a weekend.
- Competitive intent: the goal is not to clear stock but to win market share by eliminating rivals.
- Market distortion: other sellers are forced to match unsustainable prices or lose visibility.
Marketplaces such as Amazon or eBay make this easier for two reasons. Several sellers offer exactly the same product on the same listing, and price weighs heavily on who wins the sale. A single seller with artificially low prices can drag down the price benchmark for a whole category and pull small shops and established brands down with it.
Dumping vs aggressive pricing strategy: not always the same thing
A very low price does not prove there is dumping. Ecommerce is full of legitimate situations in which a seller offers aggressive prices, and mistaking them for dumping leads to the wrong reaction.
When a low price is perfectly normal
- Clearing old or discontinued stock: the seller would rather recover part of the money than keep the product.
- Temporary promotions aimed at gaining visibility or reviews.
- Market penetration strategies by new sellers, who accept a thinner margin for a while. The logic is explained in the guide to market penetration.
- Operational efficiency: some operators buy better or have lower logistics costs and can sell for less while keeping a margin.
In all these cases the low price has a clear reason and, in general, an end date.
Signs that dumping may be behind it
- The product sells well below the recommended retail price with no campaign to justify it.
- The seller keeps that price even though, based on the visible costs, they lose money on every sale.
- Differences between channels (Amazon vs online shops, for example) are excessive and stable.
- The price breaks with the market’s price history sharply and repeatedly.
| Trait | Legitimate aggressive strategy | Possible dumping |
|---|---|---|
| Duration | Limited (campaign, clearance) | Sustained for weeks or months |
| Price vs cost | Low, but with a margin or a limited loss | Below cost on an ongoing basis |
| Visible reason | Old stock, launch, events | None apparent |
| Effect on the market | Others can live with it | Others match at a loss or disappear |
The useful question is not whether the price is low, but whether it follows a sustainable commercial logic or is meant to upset the competitive balance.
Is dumping in ecommerce illegal in the EU and Spain?
It depends on what you call dumping. In strict legal terms, dumping is a concept of international trade, whereas below-cost selling between sellers inside a country is treated as selling at a loss or, if the seller dominates the market, as predatory pricing. Each concept has its own rules and its own authority. The national rules below are Spain’s; other EU countries regulate selling at a loss in their own way.
Dumping in the legal sense: imports into the EU
Regulation (EU) 2016/1036 considers a product to be dumped when its export price to the Union is lower, in the ordinary course of trade, than the comparable price of a like product in the exporting country. The European Commission investigates, normally following a complaint made on behalf of the EU industry, and can impose anti-dumping duties on those imports. An Amazon seller cannot use this route against a particular competitor.
Selling at a loss: the rule that applies between sellers
In Spain, the Unfair Competition Act, Ley 3/1991 (in Spanish), starts from the principle that prices are set freely. Its Article 17 treats selling below cost or below purchase price as unfair in only three cases: when it can mislead consumers about the price level of other products in the same shop, when it discredits the image of someone else’s product or shop, or when it is part of a strategy to drive a competitor or group of competitors out of the market.
The Spanish Retail Trade Act, Ley 7/1996 (in Spanish), also regulates selling at a loss in its Article 14. Since its amendment by Royal Decree-Law 20/2018, that article only treats selling at a loss as unfair in those same three cases plus one more: when it is part of a commercial practice with false price information that misleads, or may mislead, the consumer. In practice, selling cheaply is not enough: one of those effects has to be proved.
Predatory pricing: when the seller cutting prices dominates the market
If the seller pricing below cost holds a dominant position, the conduct may be an abuse prohibited by Article 102 of the Treaty on the Functioning of the EU and, in Spain, by Article 2 of the Competition Act, Ley 15/2007 (in Spanish). These cases are investigated by the Spanish competition authority (CNMC) or the European Commission, and they rarely affect an average marketplace seller.
| Concept | Rule | What is required | Who acts |
|---|---|---|---|
| Dumping (anti-dumping) | Regulation (EU) 2016/1036 | Imports from outside the EU priced below their home market, causing injury to the EU industry | European Commission |
| Unfair selling at a loss (Spain) | Ley 3/1991, Art. 17; Ley 7/1996, Art. 14 | Selling below cost plus one of the cases set out in the law | Spanish Courts of First Instance (Commercial Section), at the request of those affected |
| Predatory pricing | Art. 102 TFEU; in Spain, Art. 2 Ley 15/2007 | Dominant position and below-cost prices to exclude rivals | CNMC or European Commission |
This section is for guidance only and is no substitute for a lawyer specialising in competition law. If a case worries you, the price history you have kept will be the most useful evidence you can give them.
How to detect dumping in ecommerce: key signs and metrics
Spotting dumping by looking at the market now and then is almost impossible. Most signs only appear when prices are analysed continuously and compared with their history. These are the patterns worth watching.
Sharp price drops with no context
A 30% or 40% drop from one day to the next, with no active campaign or retail event, deserves a closer look. The threshold is only a guide: in categories with very stable prices, a 15% drop can already be unusual.
Prices below the estimated cost
Comparing a competitor’s price with the recommended price, the market’s price history or your own purchase cost helps you see when something does not add up. To do it properly, you have to move from the price on the tag to what the seller actually takes home.
Hypothetical example with Spanish VAT (21%): a competitor sells a product on a marketplace at €45.00 including VAT, and you buy the same product at €30.00 excluding VAT. The marketplace fee is 15% of the final price and shipping costs the seller €4.50.
| Item | Amount |
|---|---|
| Selling price including VAT | €45.00 |
| Price excluding VAT (45.00 / 1.21) | €37.19 |
| Marketplace fee (15% of 45.00) | −€6.75 |
| Shipping | −€4.50 |
| Net income per unit | €25.94 |
| Reference purchase cost | €30.00 |
| Difference per unit | −€4.06 |
With those figures, covering a cost of €30.00 would require selling at around €51.00 including VAT: 51.00 / 1.21 = €42.15, minus €7.65 in fees and €4.50 in shipping, leaves €30.00. The example is simplified (it ignores VAT on the fee and other expenses) and starts from your cost, not theirs: the competitor may buy for less than you do. If the gap is large and persists, efficiency stops being a credible explanation. The guide to price comparison mistakes covers the usual errors with shipping, VAT and bundles.
Unknown competitors with unrealistically low prices
A typical pattern is the arrival of new sellers, with no track record or ratings, whose prices are far below the rest of the category. Dumping may be behind it, but so may counterfeit goods, imports from outside the EEA without the brand’s authorisation, or sellers who do not charge VAT. Each of the three is handled through a different channel (a report to the marketplace, the brand or the authorities), and none is solved by lowering your price.
Unusual patterns that only continuous monitoring reveals
- Extremely low prices during specific times of day (this needs readings several times a day).
- Drops that repeat in weekly cycles and then return to the previous price.
- Excessive, sustained differences between marketplaces for the same product.
These behaviours can only be detected with frequent readings of competitor prices and a history that lets you compare weeks and months. A manual check once a month will not catch them.
What to do if you detect dumping in your category
The instinctive reaction, matching the price, is usually the worst: you move the loss onto your own profit and loss account and legitimise the new, lower market price. The right response depends on the cause, and the order of work is almost always the same:
- Identify the cause of the low price: an offer, efficiency, fraud or sustained below-cost selling.
- Set your minimum price from your cost and the margin you will not give up.
- Document the case with the competitor’s price history.
- Report it to the marketplace, or consult a lawyer if there is fraud or signs of a strategy to push you out.
The table sets out the response for each situation.
| Situation | Recommended response |
|---|---|
| One-off offer or clearance | Wait and watch the price history; leave your price alone |
| More efficient competitor with a margin | Compete on something other than price (delivery time, service, range) or adjust down to your minimum price |
| Price sustained below cost | Set a minimum price you never cross and document the case with price history |
| Suspected counterfeiting or fraud | Report it to the marketplace and alert the brand |
| Signs of a strategy to push you out | Consult a lawyer, with the evidence you have kept |
A well-calculated minimum price is the simplest defence. You get it from the product cost plus fees, payment gateway, shipping and the margin you are not prepared to lose; the guide to calculating your profit margin explains how. Below that price, losing a sale costs you less than winning it.
If you are a manufacturer or a brand, the problem looks different: a distributor selling far below the recommended price erodes the product’s image and the distribution network. A brand can recommend prices and check that they are respected with an RRP monitoring tool.
Imposing a fixed or minimum resale price, on the other hand, runs into competition law. Regulation (EU) 2022/720 treats it as a hardcore restriction, which takes the agreement outside the block exemption for vertical agreements. Recommending a price or setting a maximum one is allowed, as long as no pressure is applied to turn it into a fixed or minimum price.
Why price intelligence matters for detecting dumping before it hits your revenue
Dumping is not spotted at a glance; it is spotted with data. That is why it makes sense to use a price intelligence tool to monitor your competitors, detect unusual behaviour and react before your margins suffer.
Price intelligence gives you a view of the market that manual checks cannot:
- It alerts you when a competitor cuts prices sharply.
- It lets you review the price history to check whether that behaviour is one-off or systematic.
- It brings suspicious patterns to light, such as cyclical drops or persistent differences between channels.
- It puts a figure behind every pricing decision: how much the price fell, when and for how long.
Its value is not only defensive. The same data shows the products where you face no aggressive competition and can raise the price without losing position. The guide to competitive pricing strategies covers the most common models for doing so.
Raising a product by a few cents seems irrelevant on a single sale, but it adds up. In a hypothetical example, a shop that raises the price excluding VAT by €0.20 on the products where nobody competes with it, and sells 2,000 units a month of those products, brings in €400 more a month, €4,800 a year, before fees, without selling a single extra unit. With that visibility, price management stops being a late reaction and starts protecting your margin continuously.
How can you watch for unusual prices without starting a price war?
You need to read competitor prices frequently, keep their history and have a minimum price that is never crossed. Boardfy is a SaaS platform for competitor price monitoring and dynamic pricing for e-commerce, with direct price updates on Amazon, eBay, Google Shopping and Mirakl marketplaces.
- Boardfy reads your competitors’ prices every 6 hours and keeps their price history.
- Boardfy matches products by EAN or reference and compares prices with or without shipping.
- Boardfy calculates your margin from the product cost, deducting the marketplace fee, payment processing and other expenses.
- Boardfy respects your minimum price or margin: it never goes below it.
Boardfy does not decide your strategy: it applies the rules you set. On channels without a direct connection, the new price is sent to your shop or your ERP. You can try Boardfy free for 7 days, no card required.
