Skip to main content
Cognitive Biases

Post-purchase rationalization

The tendency to overlook flaws or shortcomings in an expensive item to justify the purchase and avoid feelings of buyer's remorse.

THE IDEA

What is post-purchase rationalization?

Post-purchase rationalization is a cognitive bias where a person ignores or downplays the defects, weaknesses, or unreasonable cost of a purchased item in order to justify the decision. This allows the buyer to feel better about the purchase and avoid cognitive dissonance—the discomfort that arises when actions conflict with beliefs (e.g., believing you are a smart shopper but buying a flawed product).

Key characteristics

  • Typically occurs with high-cost or high-involvement items
  • Involves selective attention to positive features while minimizing negatives
  • Can lead to loyalty despite obvious drawbacks, reinforcing future poor purchases

When to use it

  • Assessing whether your loyalty to a brand or product is based on genuine quality or post-purchase justification.

  • When making large financial decisions, such as buying a house or car, recognizing that your mind may downplay defects to protect your perception of a good investment.

  • After a sale, asking customers about shortcomings as well as benefits so satisfaction does not depend on ignoring problems.

FROM THEORY TO EVERYDAY LIFE

In practice

01

The luxury smartphone

You buy an expensive new smartphone primarily for its sleek design and brand prestige. Within a week, you notice the battery drains quickly and the camera is not as good as expected. Instead of acknowledging these flaws, you start telling yourself and others that battery life doesn’t matter because you can charge it everywhere, and the camera is fine for your needs. The high cost makes the flaws easier to dismiss.

02

The dream car

After purchasing a car you’ve wanted for years, you realize the maintenance and fuel costs are much higher than your previous vehicle. To avoid feeling regret, you focus on the car’s performance and status, minimizing the financial strain by thinking that the driving experience alone is worth the extra expense.

✳

A MOMENT TO REFLECT

Put it to work.

  1. Think about a recent expensive purchase you made. Did you later discover any shortcomings? How did you rationalize them?

  2. In what areas of your life (tech, fashion, hobbies) might post-purchase rationalization be influencing your satisfaction with your purchases?

  3. How could you create a more objective evaluation process before buying something costly to reduce the need for rationalization afterward?

CONTINUE THE CONVERSATION

Source texts

  • 60 Cognitive Biases That Ruin Everything We Do by David Scott
← More cognitive biases