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Science-backed pricing techniques for e-shops: anchoring, decoy effect, charm pricing and steps to increase conversion.
Pricing in an e-shop is not simply the sum of purchase costs, shipping, platform fees and desired profit. It is one of the most powerful positioning messages that the customer sees before deciding whether to trust your brand. A price can indicate economy, quality, rarity, reliability or convenience. The same product at €19.99, €20 or €24 is not «read» in the same way by the consumer, even if the difference in profit margin is small. This is exactly what HubSpot’s analysis of the science of pricing highlights: buyers do not evaluate prices completely rationally, but through comparisons, anchors, visual stimuli and perceived value.
For an e-commerce store owner, the right pricing strategy can directly impact conversion rate, average order value, cart abandonment rate, and repurchase. The mistake isn’t just selling high or low. The biggest mistake is pricing without context: without knowing which price acts as an anchor, which bundle increases value, how customers react to free shipping, or when a discount reduces trust instead of increasing sales. Pricing requires data, price psychology, and constant experimentation, not copying the competition.
Price psychology is based on a simple but crucial fact: the customer rarely knows the «real» value of a product. They construct it within the environment you present to them. If they see a premium product next to a more expensive option, the middle price seems more reasonable. If they see an original price crossed out and a new lower price, price anchoring is activated. If they see that shipping only appears at checkout, trust decreases, even if the final price remains competitive. That’s why e-shop pricing must be designed together with UX, merchandising, product pages and performance marketing campaigns.
In practice, e-shop owners must distinguish between price as a number and price as an experience. The first concerns margin. The second concerns perception. Perceived value increases when the customer understands what they are getting: better materials, warranty, fast delivery, support, social proof, free returns or exclusivity. A product at €49 may seem expensive on a poor product page, but fair on a page with clear photos, reviews, comparative advantages, usage videos and a clear return policy. Price alone does not convince; it convinces when supported by arguments.
Charm pricing, i.e. prices ending in 9, 99 or 95, remains one of the most well-known tactics in the science of pricing. It doesn’t work magically, nor does it suit every brand. It works mainly when the customer is quickly comparing options and when the product is in a category where the sense of bargain plays a role. Anderson and Simester’s classic research on retail catalogs showed that, in a particular test of women’s clothing, the price of $39 generated 24% more demand than the price of $34. The interesting thing here is not that the more expensive product sold more than the cheaper one, but that the ending in 9 acted as a signal of offer.
As the graph below shows, the difference is not theoretical. The price ending in 9 led to higher demand in this experiment, which is worth testing carefully in categories such as fashion, accessories, beauty, home goods, and impulse buying products.
Source: Anderson & Simester, Effects of $9 Price Endings on Retail Sales
For an e-shop, the practical conclusion is that charm pricing should be used with positioning in mind. If you sell premium jewelry, luxury furniture, or specialized B2B equipment, a price of €500 may seem clearer and more credible than €499.99. However, if you sell products with intense price comparisons, such as sneakers, gadgets, small appliances, or cosmetics, €29.99 may reduce perceived psychological resistance. The right answer lies not in a rule, but in A/B testing prices by product category and audience.
Price anchoring works when you first present a price that becomes a reference point. If a customer sees a skincare bundle for €89 and then a single product for €29, the latter seems more affordable. But if they only see the product for €29, they don’t have enough context to evaluate its value. The decoy effect goes a step further: you add an option that isn’t intended to sell, but to make the preferred option seem more advantageous. Dan Ariely’s famous study on Economist subscriptions showed a dramatic shift in choices. When the «print subscription» option was offered at the same price as the «print and digital» option, 84% chose the more expensive bundle. When the decoy was removed, only 32% chose the bundle.
The graph shows how drastically behavior changes when the comparison is designed correctly. For e-shops, this translates into three levels of packages, product bundles, "basic, best value, premium" options, or pages where the best seller is visually highlighted.
Source: Dan Ariely, Predictably Irrational / Economist subscription experiment
In an online store, the decoy effect can be applied responsibly without misleading the customer. For example, a coffee e-shop can offer one 250g bag for €8.90, two bags for €16.90 and three bags with free shipping for €22.90. The middle option acts as a bridge, while the third one strengthens the average order value. Accordingly, a cosmetics brand can present a single serum, a serum with cleanser and a complete routine bundle. The goal is not to «push» the customer, but to make the most comprehensive option easily understandable.
No pricing strategy can save a checkout that creates an unpleasant surprise. Free shipping, timely tax and fee disclosure, a clear return policy, and no account requirements are all critical elements of conversion rate optimization. According to the Baymard Institute’s cart abandonment research, the top reason for abandonment is too high additional costs, such as shipping, taxes, and fees, at a rate of 48%. This is followed by mandatory account requirements, slow delivery, and lack of trust in payment.
The chart below shows the top reasons for checkout abandonment. For e-shop owners, this data is valuable because it proves that the final price should not be revealed late. Transparency should be built from the product page to the cart.
Source: Baymard Institute, Cart Abandonment Research
If your e-shop offers free shipping over a threshold, the threshold should be displayed early and linked to smart merchandising. Don’t just write «free shipping over €50». Show the user that they need another €12 to earn it and suggest complementary products with real utility. This practice combines pricing strategy, UX and bundled pricing, and can increase the cart without aggressively pressuring the customer.
The first step is to map out the true cost per product. Include purchasing or manufacturing costs, packaging, payment fees, storage costs, returns, advertising costs per order, and service costs. Many e-commerce stores think they have a healthy margin because they only look at the difference between buying and selling. In reality, net profit is often reduced by returns, coupons, and increasing CAC. Without this foundation, any dynamic pricing or discounting can generate revenue but not profitability.
The second step is to define product roles. Not all products should have the same margin. Some products are traffic drivers, meaning they bring visits and new customers. Others are profit makers, with a higher margin. Others act as add-ons to increase the average order value. This logic helps to avoid horizontal discounts that reduce the value of the brand. Instead of doing a 20% discount across the entire store, you can create targeted bundles, threshold offers and personalized offers for specific segments.
The third step is to design three levels of value where appropriate: basic option, recommended option and premium option. This applies to products, kits, subscriptions, after-sales services or gift packages. The recommended option should have a clear value for money and not just a higher price. Use visual cues, such as «Best Value» or «Most Popular», only when you can support it with sales data. Credibility is more important than aggressive promotion.
The fourth step is to reduce price sensitivity by reinforcing value. Add comparison tables, usage photos, reviews, warranties, material information, size guides, estimated delivery, and clear returns. The fewer questions the customer has, the less likely they are to compare based solely on price. The fifth step is to run A/B price testing carefully. Don’t change price, photos, copy, and discount all at once, because you won’t know what caused the change. Test one variable at a time: €49 vs. €49.90, bundle vs. individual products, free shipping on €50 vs. €60, or display a savings message in the cart.
Pricing success isn’t measured by sales growth alone. An aggressive discount can boost sales for three days and destroy margins for a month. Track conversion rate, gross margin, contribution margin, average order value, refund rate, repeat purchase rate, and customer lifetime value. If a lower price brings in customers who never return, it may not be real growth. If a higher price slightly reduces conversion but significantly increases profit per order, it may be a better choice.
To implement more mature pricing, create a monthly pricing review. Check which products have high traffic but low conversion, which have high cart additions but high abandonment, which bundles increase AOV, and which discounts drive repeat purchases. Combine data from GA4, e-commerce platform, CRM, and ad campaigns. Pricing is an ongoing optimization process, not a one-time decision made at the beginning of the season.
The most useful conclusion for an e-commerce owner is that price must have strategic intent. Sometimes charm pricing is needed to reduce psychological distance. Sometimes price anchoring is needed to make value understood. Sometimes a decoy effect is needed to highlight the right package. And very often it is simply transparency: clear final cost, clear shipping and less friction at checkout. When pricing is connected to data, user experience and real value, it ceases to be a number on the product page and becomes a lever for growth.
Sources
Pricing affects brand positioning and consumer perceived value. It affects conversion rate, average order value, and customer trust.
Price psychology is based on how prices are presented. Consumers are often influenced by price anchoring, charm pricing, and other tactics that make prices appear more attractive.
Charm pricing uses prices ending in 9, 99, or 95 to create a sense of bargain. This technique is most effective in product categories with intense price comparisons.
The decoy effect uses a decoy option to make another option seem more advantageous. This can lead customers to choose packages or bundles with higher value.
Hidden costs, like extra shipping and taxes, can turn customers off at checkout. Being transparent about charges from the start improves trust and reduces cart abandonment.
Map true costs, define product roles, and design value tiers. Reinforce perceived value and use A/B testing to continuously optimize pricing.
Track metrics like conversion rate, gross margin, and customer lifetime value. A comprehensive pricing strategy connects to data and user experience for sustainable growth.
