Key Takeaways:

• Scarcity cues such as "Only 3 left" or "Ends tonight" raise perceived value, as decades of peer-reviewed research back this up.
• Not all scarcity is equal: limited-quantity cues tend to outperform limited-time cues, but context matters.
• Attention is not the same as persuasion: Recent eye-tracking research shows that looking at a scarcity cue can help or hurt, depending on the situation.
• Scarcity backfires when audiences read it as a sales tactic: Testing creative before launch is the safest way to know which side of that line your ad lands on.

The Scroll Problem

Every ad starts with a deficit, as people scroll fast, skip faster, and give any single creative a fraction of a second to prove it deserves a look. Brands have responded with a familiar toolkit: countdown timers, "selling fast" badges, limited drops, and "last chance" end cards. These cues work often enough that they have become a default setting in paid social, but "often enough" is not a strategy. In this post, we look at what the research says about why scarcity works, how it shows up in static and video ads today, where it fails, and how attention testing helps you tell the difference before you spend a dollar on media.

What is the Scarcity Effect?

The scarcity effect is the tendency to place a higher value on things that are limited in quantity or available for a limited time. Marketers usually separate it into two forms:

• Limited-quantity scarcity: "Only 2 left in stock," "limited edition."
• Limited-time scarcity: "Sale ends at midnight," "24-hour drop."

The Cookie Jar: Scarcity Changes Perceived Value

The most well-known demonstration comes from Worchel, Lee, and Adewole (1975), where two experiments with 200 female undergraduates showed that participants rated the same cookies as more desirable when they came from a scarce supply than from an abundant one. Here, two further findings matter for advertisers, as cookies rated higher when supply changed from abundant to scarce than when they were scarce from the start. And cookies that were scarce because of high demand were rated above cookies that were scarce because of an accident. So, the takeaway for ads is that scarcity is not only about how few items exist. It is also about why, and whether other people seem to want them.

Loss Aversion: Why "Missing Out" Stings

Prospect theory (Kahneman & Tversky, 1979) holds that people weigh potential losses more heavily than equivalent gains. A scarcity cue reframes a purchase decision from "should I get this?" to "will I lose the chance?" That shift is a large part of why urgency language moves behavior.

Quantity Beats Time, On Average

In a widely cited advertising study, Aggarwal, Jun, and Huh (2011) compared limited-quantity and limited-time messages across two studies. Limited-quantity messages produced stronger purchase intentions, the gap was larger for symbolic brands, and the effect was mediated by consumer competition, the sense that other shoppers are racing for the same item.

In other words, "only 3 left" tends to beat "ends Friday" because it puts other buyers in the frame.

Scarcity Also Steers Attention

Most scarcity research relies on self-reported intent. A 2025 eye-tracking experiment published in the International Journal of Hospitality Management (Pal et al.) looked at what people actually do. Participants viewed online hotel offers containing either limited-quantity ("only 1 room left") or limited-time ("only 1 day left") messages, with short or long booking lead-times.

The findings are useful for anyone designing creative:

• Limited-quantity messages attracted more visual attention than limited-time messages.
• Attention was highest for limited-quantity messages when the booking was far in the future.
• Fixating more on the scarcity cue raised booking probability when the trip was soon, and lowered it when the trip was far off.

Two lessons follow. First, scarcity cues do pull the eye. Second, pulling the eye is not the same as winning the decision. The same cue can help in one context and hurt in another.

How Brands Use Scarcity in Ads Right Now

Static ads

• Low-stock badges and "selling fast" flags on product images
• Sale-ends-today banners and date overlays
• "Limited edition" and "final stock" callouts

Video ads

• On-screen countdown timers
• "Last chance" end cards in the final seconds
• Creator-led teasers announcing a drop date

Social media

• Limited product drops and waitlist or invite-only launches
• Countdown stickers in Stories
• Live-shopping flash sales

The format matters because each one gives the cue a different amount of time and space. A badge on a static image competes with the product for the same glance, while a timer in a video can build tension, but only if viewers see it before they scroll past.

When Scarcity Backfires

The research is just as clear that scarcity is not a free lunch.

Viewers who spot the tactic discount it: Lee, Oh, and Jung (2014) found that scarcity claims boosted product evaluation when consumers read them as a signal of value, but the boost faded when consumers interpreted them as a sales tactic. Company reputation influenced which interpretation people reached. A trusted brand gets more benefit of the doubt.

Expectation matters: Mukherjee and Lee (2016) showed across three studies that scarcity appeals helped when consumers already expected scarcity, but not when they did not. Activating persuasion knowledge, meaning the viewer's awareness that they are being persuaded, could eliminate the positive effect entirely.

How you say it matters: Aguirre-Rodriguez (2013) found that supply-related scarcity appeals were less likely to trigger persuasion knowledge than demand-related ones, and that stating a supply appeal in specific terms rather than vague ones reduced its persuasiveness. Small wording choices can change how an ad is received.

FAQ

Does scarcity work in video ads as well as static ads? The core psychology applies to both, but video gives the cue less time to be noticed. The attention evidence above comes from static online offers, so video creative should be tested directly.

Is limited-time or limited-quantity scarcity better? In the research cited here, limited-quantity messages tended to win on purchase intention and attention. The best choice still depends on the brand, product, and audience, which is why variant testing helps.

Can scarcity hurt my brand? Yes, as when viewers read a scarcity claim as a sales tactic, the benefit fades, and overuse or fake urgency can erode trust.

References

• Aggarwal, P., Jun, S. Y., & Huh, J. H. (2011). Scarcity messages: A consumer competition perspective. Journal of Advertising, 40(3), 19-30.
• Aguirre-Rodriguez, A. (2013). The effect of consumer persuasion knowledge on scarcity appeal persuasiveness. Journal of Advertising, 42(4), 371-379.
• Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263-291.
• Lee, S. Y., Oh, S., & Jung, S. (2014). The effects of scarcity appeal on product evaluation: Consumers' cognitive resources and company reputation. Social Behavior and Personality, 42(5), 743-756.
• Mukherjee, A., & Lee, S. Y. (2016). Scarcity appeals in advertising: The moderating role of expectation of scarcity. Journal of Advertising.
• Pal, A., Banerjee, S., Kapetanaki, A., Karapanagiotidis, T., & Samaddar, S. (2025). Understanding the captivating power of online scarcity messages: An eye-tracking study. International Journal of Hospitality Management, 104197. https://doi.org/10.1016/j.ijhm.2025.104197
• Worchel, S., Lee, J., & Adewole, A. (1975). Effects of supply and demand on ratings of object value. Journal of Personality and Social Psychology, 32(5), 906-914.

‍