Anchoring Effect

The anchoring effect is a cognitive bias where people rely disproportionately on the first piece of information they encounter (the “anchor”) when making subsequent judgments. In pricing, the first number a customer sees sets an expectation that shapes how they evaluate every subsequent price — even if the anchor is arbitrary or irrelevant.

How anchoring works

Tversky and Kahneman demonstrated this by spinning a random wheel numbered 0-100, then asking people to estimate the percentage of African countries in the UN. People who saw a high number on the wheel gave estimates 20+ percentage points higher than those who saw a low number — even though the wheel was obviously random.

In commercial contexts, anchoring is even more powerful because the anchor seems relevant. A $499 jacket makes a $199 jacket look like a deal. A “Compare at $120” label makes a $59 price feel like a steal. The anchor doesn’t need to be realistic — it just needs to be seen first.

Anchoring in pricing and CRO

Price presentation order. Show the most expensive option first. When users see your enterprise tier at $499/month before seeing your growth tier at $149/month, the $149 feels reasonable. Reverse the order and $149 feels expensive because there’s no upward anchor.

Original price display. Showing a struck-through original price next to the current price creates an anchor. “$200 $350” activates both anchoring (the $350 sets expectations) and loss aversion (the customer would “lose” the $150 savings by not buying now).

Feature quantity anchoring. “Includes 50+ features” anchors the user to expect a large number. Then when you show a competitor comparison with 12 features, the gap feels enormous — even if many of your 50 features are minor.

Salary and negotiation. In B2B sales, the first price mentioned anchors the entire negotiation. This is why experienced sellers present their price before asking for the buyer’s budget.

Testing anchoring effects

Anchoring is one of the most reliably testable behavioral principles in CRO:

• Test the order of pricing tiers (high-to-low vs. low-to-high)
• Test showing vs. hiding original/comparison prices
• Test different anchor values (“starting at $X” where X varies)
• Test anchoring in non-price contexts: “Takes only 2 minutes” anchors time expectations for form completion

The ethical dimension

Anchoring is ethically neutral as a mechanism — it’s how you use it that matters. Anchoring a fair price against a legitimate comparison is honest. Manufacturing fake “original prices” or “competitor prices” is deceptive. The test: if a customer understood exactly how you were using anchoring, would they feel informed or manipulated?

Practical example

An online education platform tested their pricing page in two configurations. Version A showed plans low-to-high: $29, $79, $199. Version B showed plans high-to-low: $199, $79, $29. Version B increased selection of the $79 plan by 22% — the $199 anchor made $79 feel like the sensible middle ground. Revenue per visitor increased 18% because the $79 plan had better margins than the $29 plan.