Have you ever bought something and then wondered: “Why did I really buy this?”
Well, you’re not alone. Consumers make spontaneous purchases every single day.
Impulse buying is a common consumer behaviour, often driven by marketing strategies designed to trigger psychological responses and entice purchases. It’s not as random as we think it is!
So, what actually happens in our brains when we make an impulse purchase? And how do marketing strategies influence our decisions both online and in-store? This article explores both questions.
What is impulse buying behaviour?
Impulse buying is described as a buying situation in which a customer makes a spur-of-the-moment purchase, and the decision is made just a moment before the purchase is made without any prior planning or consideration (Gottumukkala et al., 2023, p. 110).
This behaviour often happens because of an emotional or psychological trigger that encourages a consumer to make a random purchase to fulfil a sudden urge. Therefore, consumers often make quick decisions based on these factors, rather than truly considering the necessity of the purchase before making it (p. 110).
Impulsive buying can occur both in physical stores and online. Whether it’s grabbing a chocolate bar while waiting in line at the checkout, rushing to buy items online that are suddenly “almost sold out”, or ordering a product after seeing an influencer promote it on social media, these purchase decisions are driven by an immediate desire rather than an actual necessity.
What is the psychology behind impulse buying behaviour?
Let’s take a closer look at how the human brain processes emotions and makes decisions to better understand why consumers make impulsive purchases.
Impulsive buying usually happens when emotion-driven responses clash with logical thinking while making a decision. This means that it affects the normal decision-making process by replacing thoughtful evaluation and careful thinking with an irrational, short moment of self-reward (Gottumukkala et al., 2023, p. 114).
It’s no surprise that we sometimes feel an unexplainable, irresistible urge to buy something, even when we know we don’t need it. After all, we’re only human!
One way to understand this specific behaviour is through the dual-process theory, which suggests that human thinking involves two different processes: System 1 Thinking and System 2 Thinking. System 1 is “fast, automatic, intuitive and emotionally driven”, and System 2 is “slower, more analytical and deliberate” (Chaudhary et al., 2025, p. 105).
During an impulsive purchase, it’s common for our emotions to take control of our decision-making process, which can lead consumers to act on sudden desires. According to Chaudhary et al. (2025), System 1 responds very quickly to sensory stimuli, like nice product displays or unbelievable sales. This specific response can trigger intense purchasing urges. When consumers are confronted with this type of situation, their desire to satisfy their need overpowers their ability to reflect, making it much more difficult to determine if a purchase is really necessary.
Why do we make impulsive purchases?
But why do we sometimes act on these urges without thinking twice?
The answer lies in how our brains process emotions and rewards.
- Emotions and pleasure: Research shows that emotions and pleasure play a central role in impulsive buying. So, when consumers see a product and experience positive, strong emotions such as happiness, excitement and comfort, they are more likely to make spontaneous purchases (Le et al., 2025, p. 99).
- The brain’s reward system: Giving in to the urge to buy something immediately offers instant satisfaction, which feels like a reward (Le et al., 2025, p. 99).
Ultimately, impulse buying happens when there’s a conflict between the desire for immediate reward and the ability to control our purchasing decisions. When the emotional urge becomes stronger than our rational thinking, consumers are more likely to give in to making a purchase. (Rodrigues et al., 2021).
Which factors contribute to impulse buying behaviour?
Impulse buying often results from a combination of internal psychological factors and external environmental influences.
According to Rodrigues et al. (2021), many factors can contribute to impulsive buying, including consumers’ emotions and different moods, self-esteem, life satisfaction, store environments, sensory experiences and promotional campaigns.
Le et al. (2025) also identify two strong drivers of impulse buying behaviour.
- Hedonic motives (HM): Defined as “the buying motive of consumers when they feel shopping is a pleasure, and they will not pay attention to the benefits of the purchased product” (Le et al., 2025, p. 99). This refers to the influence of a consumer’s drive to seek a positive feeling. Consumers who have hedonic motivation view shopping as an enjoyable experience rather than a necessary activity to purchase a product.
- Utilitarian motives (UM): Defined as “rational consumer buying behaviour that is naturally formed when consumers are trying to allocate their purchases efficiently” (Le et al., 2025, p. 99). Although these motivations are usually associated with rational shopping decisions, they can also encourage random purchases when consumers perceive an unexpected opportunity to save money.
Beyond these motivations, the shopping environment also plays an important role. Attractive product displays, store atmospheres and sensory experiences can capture consumers’ attention and stimulate spontaneous purchasing decisions. Product characteristics, familiarity with a brand and brand loyalty can also influence these behaviours (Rodrigues et al., 2021).
Ultimately, impulse buying can be triggered by both what consumers are feeling internally and what they encounter in their shopping environment.
How does marketing influence impulse buying behaviour?
Marketing doesn’t just entice consumers into adopting certain buying behaviours. It works by triggering distinct psychological factors and purchasing motives. Marketers can therefore come up with strategies that favour spontaneous purchasing decisions by understanding what truly drives consumer behaviour (Rodrigues et al., 2021).
Here are some of the marketing techniques that can contribute to impulse buying:
- Sales promotions: Discounts, coupons, gifts, loyalty programs and buy-one-get-one (BOGO) offers can influence how consumers perceive a product’s value. Sales promotions are particularly powerful because they can encourage consumers to act on an immediate desire to purchase (Rodrigues et al., 2021). Think about it: are you more likely to buy a sweatshirt when there’s a big sale for a limited time only?
- Advertising and visual design: Colours, images, graphics, and sound attract attention and increase consumer interaction. Advertising messages can create psychological responses that generate product desire and influence purchasing intentions (Rodrigues et al., 2021).
- Store atmosphere and product placement: The physical shopping environment can absolutely stimulate impulse buying through different sensory experiences, such as attractive displays, product arrangements and store atmospheres. These experiences can capture attention and encourage consumers to make random purchases (Rodrigues et al., 2021).
- Emotional marketing: Because impulse buying is closely connected to emotional responses, brands can utilize their marketing strategies to appeal to consumers’ feelings and encourage purchases that are motivated by immediate satisfaction rather than practical necessity (Rodrigues et al., 2021).
These strategies show how marketing can truly influence consumers and shape their purchasing behaviours and decisions.
What are the differences of online and in-store impulsive buying?
Impulsive buying can occur online and in-store. However, the main difference between both experiences is that online impulsive buying is greatly influenced by digital stimuli, whereas in-store impulsive buying is strongly influenced by physical and sensory stimuli. Consequently, both environments can cause emotional and psychological triggers that lead to spontaneous purchasing decisions (Octavia, 2026, p. 1).
| Factors | Online impulse buying | In-store impulse buying |
| Shopping environment | Virtual atmosphere, website layout, interactive features and website design. | Store atmosphere, physical layout, displays and product placement. |
| Sensory experience | Digital visuals, interactive features and creative interfaces. | Physical sensory experiences. |
| Promotional strategies | Online sales promotions and digital advertising. | In-store sales promotions, attractive displays and personal selling. |
| Product characteristics | Higher impulse buying for products involving greater product consideration. | Higher impulse buying for products involving lower product consideration. |
| Product variety | Wide product selection and price comparisons easily available online. | Variety of products available within the physical store. |
| Social influence | Influenced by online content and virtual shopping experiences. | Influenced by personal interactions and recommendations from friends, family and salespeople. |
Frequently Asked Questions (FAQ)
Are all spontaneous purchases impulsive?
No. Impulse buying is not simply an unexpected purchase; it’s a behaviour in which a consumer develops an interest in a product triggered suddenly by external and internal factors (Octavia, 2016, p. 1).
Why do we feel the urge to buy things we don’t need?
It’s because the desire for immediate satisfaction can overpower the logical thinking process in our brain (Chaudhary et al., 2025).
Is impulsive buying a bad behaviour?
Not necessarily. Impulsive buying is a relatively common and innocent consumer behaviour. However, when purchasing becomes repetitive, difficult to control and occurs as a response to negative events or feelings, it may develop into compulsive buying, which can have negative consequences. (Verplanken & Sato, 2011, p. 203).
Conclusion
Impulse buying is a complex behaviour rooted in the interaction between our emotions, decision-making processes and the marketing strategies we encounter every day, often without even realizing it.
As consumers, we may not always be able to recognize when we’re making impulsive purchases. However, understanding the psychology behind this consumer behaviour can help us become more aware of our personal triggers and shopping habits.
So, the next time you find yourself wanting to make an impulsive purchase, remember: the more we understand what drives our purchasing decisions, the more control we have over them.
References
Chaudhary, R., Jain, S., Gupta, R., Aggarwal, V., Soniya, & Bhamu, A. (2025). Understanding the psychology of impulse buying in e-commerce: A behavioral review. Journal of Marketing & Social Research, 2(6), 102–113. https://jmsr-online.com/article/understanding-the-psychology-of-impulse-buying-in-e-commerce-a-behavioral-review-314/
Gottumukkala, M., Shireesha, M., & Sundari, K. N. (2023). Impulse buying behavior of consumers: An empirical study. Madhya Bharti, 83, 110–115. https://www.researchgate.net/publication/370843718_IMPULSE_BUYING_BEHAVIOR_OF_CONSUMERS_AN_EMPIRICAL_STUDY
Le, N., Le, T. H. H., Huynh, T. N., Do, D. Q., Pham, T. K. T., & Tran, T. N. O. (2025). Marketing stimuli and impulse buying: The role of traits, reviews and motives. Journal of Promotion Management, 31(1), 96–124. https://doi.org/10.1080/10496491.2024.2428965
Octavia, D. (2016). The differences of online and in-store impulse buying behavior using stimulus and response model. In Proceedings of the 3rd International Seminar and Conference on Learning Organization (ISCLO 2015) (pp. 149–151). Atlantis Press. https://doi.org/10.2991/isclo-15.2016.28
Rodrigues, R. I., Lopes, P., & Varela, M. (2021). Factors affecting impulse buying behavior of consumers. Frontiers in Psychology, 12, Article 697080. https://doi.org/10.3389/fpsyg.2021.697080
Verplanken, B., & Sato, A. (2011). The psychology of impulse buying: An integrative self-regulation approach. Journal of Consumer Policy, 34(2), 197–210. https://doi.org/10.1007/s10603-011-9158-5