Dynamic pricing is a strategy in which a business changes the price of a product or service over time in response to demand, competitor prices, stock levels, time or other market conditions, usually with software that applies rules or algorithms. Airline fares, Uber surge prices and repricing on Amazon Marketplace are common examples. Dynamic pricing is generally legal in the US, the EU and the UK. The risks are elsewhere: hiding how prices change, personalizing prices from personal data without the required disclosure, raising prices during emergencies where price gouging laws apply, and coordinating prices with competitors through shared software or data.
Sources: PriceRest 2026 study of 261 online stores in 24 countries; Chen, Mislove and Wilson, WWW 2016. The legal sections are general information, not legal advice.
The basics
What is dynamic pricing?
Dynamic pricing means the price of the same product changes over time as conditions change. Instead of a fixed list price reviewed once a season, the seller sets rules or uses an algorithm that recalculates the price when demand, stock, competitor prices or the time of purchase change.
The idea is old. Markets, airlines and hotels have always charged more when demand is high. What has changed is speed and scale. Online sellers can now collect competitor prices automatically and update thousands of prices a day. Price changes are common: in our 2026 study, 46% of products changed price within 30 days, and 49% of the changes were increases. The typical change was 4.6% on marketplaces and 20% in online stores.
Dynamic, personalized and surge pricing compared
These terms are often used as if they mean the same thing. They do not, and the difference matters both for customers and for the law.
| Term | What changes the price | Who sees the price | Example |
|---|---|---|---|
| Dynamic pricing | Market conditions over time | Everyone at that moment | A store lowers a price after a competitor does |
| Surge pricing | A short spike in demand | Everyone in that area at that moment | Ride prices rise during a storm |
| Segment pricing | A group the buyer belongs to | Each group, such as students | Student discounts; see differential pricing |
| Personalized pricing | Data about the individual buyer | One person | A price set from browsing history |
| Static pricing | Nothing, until a manual review | Everyone | A printed price list |
Most e-commerce dynamic pricing is market-based: everyone who visits at the same time sees the same price. Personalized pricing based on individual data is the area that regulators are watching most closely.
How dynamic pricing works
- Collect data. Your costs, stock and sales, plus external data such as competitor prices and availability from competitor price tracking.
- Set guardrails. A minimum price that protects your margin and a maximum price that protects trust.
- Apply rules or a model. Rule-based pricing follows if-then rules you write. Algorithmic pricing uses a model, for example one trained on price elasticity.
- Update the price. The new price goes to your store or marketplace, automatically or after approval.
- Measure and adjust. Track sales, margin and price position, then refine the rules.
Types of dynamic pricing
| Type | How it works | Typical users | Main risk |
|---|---|---|---|
| Competitor-based | Prices follow selected competitors within your limits | E-commerce stores, marketplace sellers | Price wars without a floor |
| Demand-based | Prices rise with demand and fall when it is low | Airlines, hotels, ride-hailing, events | Customer backlash |
| Time-based | Prices change by hour, day or season, or as a deadline gets closer | Travel, restaurants, utilities | Confusion if not explained |
| Inventory-based | Prices rise when stock is scarce and fall to clear surplus | Retail, fashion, perishables | Clearing too late or too early |
| Rule-based | If-then rules decide the price | Most small and mid-size sellers | Rules that conflict |
| Algorithmic | A model predicts the best price | Large retailers, marketplaces | Hard to explain and audit |
| Personalized | Data about an individual sets the price | Rare in retail; under legal scrutiny | Disclosure rules, data protection, trust |
Dynamic pricing examples
Airlines and hotels
Seats and rooms are limited and expire on a fixed date. Prices usually rise as the date gets closer and the cheaper fare classes sell out. This is the classic form of revenue management.
Uber surge pricing
Uber explains that prices may increase when so many people request rides that there are not enough drivers, for example in bad weather, at commute times or around big events. The higher price is meant to bring more drivers onto the road.
Amazon Marketplace
On Amazon, many sellers compete for the same product page, and many use repricing software. A 2016 study by Chen, Mislove and Wilson found more than 500 sellers very likely using algorithmic pricing. Read our Amazon pricing strategy guide for repricing with a floor and a ceiling.
Online stores
Retailers change prices when competitors do, when stock runs low or when a promotion ends. Promotions are often short: in our study, 56% of price cuts were reversed within 14 days.
Concert tickets
After complaints about the 2024 Oasis ticket sale, the UK competition authority investigated Ticketmaster. It closed the case in September 2025 without finding dynamic pricing, after Ticketmaster agreed to give clearer information about tiered prices. The case shows how sensitive customers are when prices change during a sale.
A lesson from Wendy’s
In February 2024, comments from Wendy’s about testing dynamic pricing on digital menu boards were widely reported as surge pricing. The company clarified that it would not raise prices at its busiest times and that any changes would be discounts in quieter periods. How you describe dynamic pricing matters as much as how you use it.
Benefits and risks
| Benefits | Risks |
|---|---|
| Reacts to competitor moves in hours, not weeks | Price wars when rules have no floor |
| Raises prices when competitors run out of stock | Customers lose trust if changes look unfair |
| Clears slow stock before it ages | Wrong product matches lead to wrong prices |
| Protects margin with automatic floors | Legal risk with personal data or shared competitor data |
| Saves hours of manual price checks | Over-automation without human review |
Law
Is dynamic pricing legal?
Yes, in general. Changing prices in response to market conditions is lawful in the US, the EU and the UK. The rules focus on how prices change: transparency, personal data, price claims, emergencies and coordination with competitors.
| Issue | United States | European Union | United Kingdom |
|---|---|---|---|
| Market-based dynamic pricing | Generally legal | Generally legal | Generally legal; CMA tips on transparency |
| Personalized pricing | Disclosure law in New York; FTC proposal on disclosure | Must be disclosed before purchase | Consumer and data protection law apply |
| Different prices by country | No federal ban | Not by nationality or residence for most online sales | No equivalent ban |
| Coordinating with competitors | Illegal price fixing | Illegal cartel conduct | Illegal cartel conduct |
United States
- Personalized pricing. New York’s Algorithmic Pricing Disclosure Act took effect on November 10, 2025. A business that sets a price with an algorithm using a consumer’s personal data must show the statement THIS PRICE WAS SET BY AN ALGORITHM USING YOUR PERSONAL DATA, with civil penalties of up to $1,000 per violation.
- FTC. In January 2025 the FTC published initial findings on surveillance pricing, showing that data such as location, browsing history and abandoned carts can be used to target prices. On August 19, 2026 it proposed a policy statement saying businesses should clearly disclose personalized prices where consumers would not expect them.
- Emergencies. Many states have price gouging laws that limit price increases on essential goods during declared emergencies. Pause automatic increases in affected areas.
- Coordination. In 2015 the Justice Department brought its first e-commerce price-fixing case against a seller who agreed with competitors to use pricing algorithms to coordinate poster prices on Amazon Marketplace. In November 2025 it reached a proposed settlement with RealPage that limits how its rent software uses competitors’ nonpublic data.
European Union
- Personalized pricing. Since the Omnibus Directive, the Consumer Rights Directive requires online sellers to tell consumers before purchase when a price has been personalized by automated decision-making. Personalization is allowed, but it must be disclosed and must comply with the GDPR.
- Prices by country. The Geo-blocking Regulation bans different general conditions, including prices, based on a customer’s nationality or place of residence for most online sales. Different prices in different national stores remain possible if any customer can buy on the same terms.
- Discount claims. When you announce a price reduction, the reference price must be the lowest price of the previous 30 days. See our Black Friday pricing guide.
- Coming next. The European Parliament research service expects a Digital Fairness Act proposal in mid-November 2026. In July 2026 the Parliament asked the Commission to consider all options, including a ban on dynamic pricing for live sports and cultural events.
United Kingdom
- CMA tips. In June 2025 the CMA published tips for businesses using dynamic pricing: be clear that prices can change, explain what makes them change, do not push customers into snap decisions and do not change the price while a customer is paying.
- Price transparency. Under the Digital Markets, Competition and Consumers Act 2024, the CMA can fine businesses directly for consumer law breaches, and mandatory fees must be included in the headline price.
- Coordination. In 2016 the CMA fined an Amazon seller that had agreed with a competitor not to undercut each other, using repricing software to apply the agreement.
Brands and resellers: dynamic pricing by your resellers is their own decision. In the EU and the UK, pressuring resellers to keep prices above a minimum is resale price maintenance. Read Is MAP pricing legal?
Red lines for any dynamic pricing program
- Use public data only. Monitor prices that competitors show to customers. Never share your prices, plans or software settings with competitors, and never use their nonpublic data.
- Keep the price stable at checkout. The price in the basket should be the price the customer pays.
- Disclose personalization. If a price uses personal data, say so where the law requires it, and check data protection rules first.
- Keep discount claims honest. Do not raise a price shortly before a sale so that the discount looks larger.
- Pause increases in emergencies. Stop automatic price rises on essential goods in affected areas.
- Keep a human in charge. Review the biggest changes and keep a log of every rule and price change.
Practice
How to start dynamic pricing in e-commerce
- Pick a goal per product group. Margin, sales volume, stock clearance or price position. One rule set rarely fits every product.
- Choose the competitors that matter. Five to ten real rivals per category are better than every seller on the internet. Our guide on whether to match a cheaper competitor helps here.
- Match products accurately. Use barcodes, MPNs and images. Product matching errors lead straight to wrong prices.
- Set floors and ceilings. Calculate a minimum price that covers cost, fees and target profit with our margin and markup calculator, and add a maximum price.
- Write a few simple rules. Start with three to five rules and add more only when you understand their effect.
- Test on a small group. Run the rules on 50 to 100 products for two to four weeks and compare sales and margin with a similar group.
- Monitor and review. Check your price index, margin and sales every week, and review the rules every month.
Example pricing rules
These rules are a starting point for an online store. Adjust the numbers to your margins and market.
| Situation | Example rule |
|---|---|
| A key competitor is cheaper | Match or go 1% lower, but never below the floor |
| All key competitors are out of stock | Raise the price by up to 5%, within the ceiling |
| You are the cheapest by more than 5% | Raise the price to 2% below the next competitor |
| Your own stock is low | Stop matching price cuts until you restock |
| Product has not sold for 60 days | Reduce the price in steps, down to the floor |
| A competitor’s price looks like an error | Ignore prices more than 30% below the market and alert a person |
Common mistakes
- No floor. Two repricers undercutting each other can push a price far below cost.
- Following the wrong competitor. A small seller with no stock should not set your price.
- Only cutting prices. Almost half of price changes in our study were increases. Rules should raise prices too.
- Ignoring delivery and stock. A cheaper offer with a long delivery time is not the same offer.
- Changing too often. Constant changes can confuse customers. Set a minimum time between changes.
- No explanation. If prices vary, tell customers how and when, as the CMA advises.
PriceRest
How PriceRest helps
PriceRest is dynamic pricing software built on competitor price monitoring. It finds and matches competitor products, tracks their prices and stock, and suggests or applies new prices with your rules, a minimum price and a maximum price. It can also raise prices when the market allows.
- Coverage. Amazon on 20 marketplaces, Google Shopping, other marketplaces and more than 2,500 online stores in 64 countries.
- Matching. Google Search, Google Shopping and site search discovery, with product-code and AI image matching.
- Rules. Competitor-based rules with floors and ceilings, including price increases when competitors are out of stock or more expensive.
- Integrations. A Shopify dynamic pricing app, Excel export and API.
Comparing tools? See the best Shopify dynamic pricing apps.
FAQ
Frequently asked questions
What is dynamic pricing in simple terms?
Dynamic pricing means changing the price of the same product over time as conditions change, such as demand, competitor prices, stock or the time of purchase. Software usually applies rules or an algorithm, so prices can update many times a day instead of once a season.
Is dynamic pricing legal?
Yes, dynamic pricing based on market conditions is generally legal in the US, the EU and the UK. Problems arise with hidden or misleading price information, undisclosed personalized prices, price gouging during emergencies and any coordination of prices with competitors. Check the rules in each market where you sell.
What is an example of dynamic pricing?
Common examples are airline fares that rise as the flight date approaches, Uber surge prices during bad weather and online stores that change prices when a competitor does. Sellers on Amazon Marketplace also use repricing software to adjust prices automatically.
What are the main types of dynamic pricing?
The main types are competitor-based, demand-based, time-based, inventory-based, rule-based, algorithmic and personalized pricing. Most online stores use competitor-based and rule-based pricing, with a minimum price to protect margin and a maximum price to protect customer trust.
What is the difference between dynamic pricing and personalized pricing?
Dynamic pricing changes the price over time for everyone, based on market conditions. Personalized pricing sets a different price for an individual based on data about that person, such as location or browsing history. Personalized pricing faces stricter rules, including disclosure duties in the EU and New York.
Is dynamic pricing the same as surge pricing?
No. Surge pricing is one form of dynamic pricing in which prices rise for a short time because demand is much higher than supply, as with ride-hailing during a storm. Dynamic pricing is broader and includes price cuts, competitor-based changes and seasonal changes.
Is dynamic pricing price discrimination?
Not usually. Market-based dynamic pricing shows the same price to everyone at the same moment. Price discrimination means charging different customers different prices for the same product, which is closer to segment or personalized pricing. Some forms are restricted, such as prices based on nationality for online sales in the EU.
How do Amazon sellers use dynamic pricing?
Many Amazon sellers use repricing software that adjusts their price when competing offers change, aiming for the featured offer while staying above a minimum price. Rules usually consider the total price including shipping, delivery speed and stock. A floor that covers cost and Amazon fees is essential.
How do I start dynamic pricing for my online store?
Choose a goal for each product group, select five to ten key competitors, match products accurately and set a minimum and maximum price for each product. Then write a few simple rules, test them on a small group of products for two to four weeks and review the results before you expand.
Is dynamic pricing fair to customers?
It can be, if it is transparent and predictable. Customers accept prices that change with demand or competition when they know prices can change and the price at checkout matches the price shown. Trust suffers when changes are hidden, very frequent or appear to target individual customers.
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