The Anchoring Effect: Why Your First Price Wins

The number that shouldn't matter but does

In 1974, Amos Tversky and Daniel Kahneman ran an experiment that still makes economists uncomfortable. They spun a wheel of fortune in front of participants. The wheel was rigged to land on either 10 or 65. Then they asked: "Is the percentage of African nations in the United Nations higher or lower than this number?"

The number was random. Generated by a wheel. Everyone knew it was random.

Then they asked participants to estimate the actual percentage. The group that saw the wheel land on 10 gave a median estimate of 25%. The group that saw 65 gave a median estimate of 45%. A random spin of a wheel shifted people's estimates by 20 percentage points.

This is the anchoring effect. The first number you encounter becomes a reference point, an anchor. Every judgment after that gets made relative to it. Not because you consciously decide the anchor is meaningful. Your brain does it automatically, without your permission.

Tversky and Kahneman published this in Science under the title "Judgment under Uncertainty: Heuristics and Biases." It became one of the most cited papers in the history of psychology. The bias it describes is so fundamental that no amount of awareness fully eliminates it. Knowing about anchoring doesn't make you immune. It just makes you a little less susceptible.

The implications for pricing psychology are hard to overstate. And most businesses get them wrong.

Arbitrary coherence: when Social Security numbers set prices

Dan Ariely, a behavioral economist at Duke, took anchoring further in a series of experiments described in his 2008 book Predictably Irrational. He introduced a concept called "arbitrary coherence." The idea: initial prices are often completely arbitrary, but once they're established in our minds, they shape all future price judgments with remarkable consistency.

His most famous demonstration involved MIT students, a collection of products, and the last two digits of their Social Security numbers.

The experiment that changed pricing psychology

Ariely showed students a bottle of wine, a cordless keyboard, a box of chocolates, and other items. Before asking what they'd pay, he had each student write down the last two digits of their Social Security number and then indicate whether they'd pay that amount for each item.

The results were hard to explain away. Students whose Social Security numbers ended in the top 20% (80-99) bid an average of $56 for the cordless keyboard. Students in the bottom 20% (01-20) bid an average of $16. Across all items, the top-quintile bids were 216% to 346% higher than the bottom-quintile bids.

Social Security numbers have nothing to do with the value of a keyboard. Everyone knows this. But just writing that number down and considering it as a potential price, even hypothetically, created an anchor that warped their willingness to pay.

Why the anchor persists

Ariely's conclusion: "We could have just as well asked for the current temperature or the manufacturer's suggested retail price. Any question, in fact, would have created the anchor." And the anchor persisted. When students bid on a second bottle of wine later, the original grouping held. The low-number group still bid low. The high-number group still bid high. The arbitrary anchor had become coherent: a stable reference point for future decisions.

This is why the first price a customer sees on your page matters more than any price that follows.

How the highest tier reframes everything below it

The most common pricing page mistake I see in SaaS is listing plans from lowest to highest. Basic at $9/month, Pro at $29/month, Enterprise at $99/month. Left to right, cheap to expensive.

It feels logical. It also leaves money on the table.

The research: price order changes revenue

Research by Suk, Lee, and Lichtenstein (2012) tested exactly this. They alternated the sequence of beer prices in a bar over an 8-week period. When beers were listed from low to high ($4 to $10), the average sale was $5.78. When listed from high to low, the average sale rose to $6.02. A simple reordering shifted average revenue upward. No change in products. No change in actual prices.

The mechanism is anchoring. When the first price you see is $99, the $29 option feels like a bargain. When the first price is $9, the $29 option feels expensive. Same number, different perception. The anchor reframes everything.

Why leading with Premium works in SaaS

This is why smart SaaS pricing pages show the Enterprise plan first. Most people won't buy it, but its price sets the anchor. The mid-tier plan suddenly looks reasonable by comparison. The customer isn't evaluating the plan on its own merits. They're evaluating it relative to the first number that entered their mind.

Apple is the master of this. When they announce a new iPhone, they start with the Pro Max at $1,199. By the time they get to the base model at $799, it feels like a deal. Nobody's comparing $799 to last year's phone. They're comparing it to the $1,199 they just absorbed. This same mechanism drives how first impressions shape every interaction that follows -- the initial reference point colors all subsequent evaluation.

The decoy effect: the option nobody picks that changes what everyone buys

In 1982, Joel Huber, John Payne, and Christopher Puto found something that violated a basic principle of economics. According to rational choice theory, adding an inferior option to a set of choices shouldn't change preferences between the existing options. Why would introducing something worse make you more likely to pick one of the originals?

But it does. Consistently. They called it the asymmetric dominance effect, now commonly known as the decoy effect.

How decoys shift choice in practice

In one experiment, participants chose between a five-star restaurant 25 minutes away and a three-star restaurant 5 minutes away. The options were designed to be equally attractive: quality versus convenience. When a third option was added, a four-star restaurant 35 minutes away, preferences shifted significantly toward the five-star option. The decoy made the five-star restaurant look like a better deal by comparison.

A meta-analysis by Heath and Chatterjee (1995) found that across product categories, introducing an asymmetrically dominated decoy increased the choice share of the target option by an average of 11.3%. This connects to broader research on how fewer, well-framed options outperform overwhelming choice sets.

You've seen this on SaaS pricing pages, even if you didn't recognize it. The middle tier is usually the target, the one the company wants you to buy. The highest tier often works as the decoy: priced high enough to make the middle look reasonable, loaded with features most customers don't need. That "Most Popular" badge on the middle tier isn't just a label. It's the end result of a carefully constructed choice architecture.

Zoom's pricing page reportedly uses the decoy effect twice: once to nudge users toward the $19.99/month web conferencing plan, and again to push toward the $30 bundled plan. The options that seem to exist for completeness are doing real psychological work.

Anchoring in testimonials and competitive positioning

This is where anchoring intersects with social proof, and where most companies miss an opportunity.

When a customer testimonial mentions a specific number, that number becomes an anchor for every reader. "We increased conversion rates by 42% in three months" doesn't just describe an outcome. It sets an expectation. Every prospect who reads that testimonial will evaluate your product against that 42% benchmark.

This is why vague testimonials like "great product, highly recommend" do almost nothing psychologically. They contain no anchor. There's no number for the brain to grab onto, no reference point for future evaluation. Crafting the right collection prompts matters a lot here. Our guide on testimonial questions that get great answers covers how to elicit these specific, quantified responses.

Quantified testimonials as pricing anchors

Specific, quantified testimonials do the anchoring work for you:

• "We cut customer support tickets by 60%"
• "ROI of 340% in the first year"
• "Saved our team 15 hours per week"

Each of those numbers plants itself in the reader's head. They don't need to believe they'll hit exactly those results. The anchor doesn't work by setting a precise expectation. It creates a reference point that makes even lesser outcomes feel significant. Read "340% ROI" and later achieve 150%? You're still thrilled, because without that anchor, you might have expected 20%.

Competitive anchoring through third-party proof

This applies to competitive positioning too. If your competitor's pricing is higher, reference it early. "Unlike solutions that cost $500/month, we deliver comparable results starting at $49." The $500 anchor makes $49 feel like a steal. If you'd said $49 without the comparison, the customer evaluates it against whatever arbitrary number was already in their head, which might be $20. Research on how customers trust peer experiences over sales messaging confirms this: third-party numbers carry more weight.

The order matters. The first number wins.

The ethics of anchoring: where persuasion becomes manipulation

I want to be direct about this, because anchoring is powerful enough to misuse.

There's a difference between framing your value effectively and exploiting cognitive biases to mislead. Setting your Enterprise tier at $299/month to anchor the Pro tier at $99 is legitimate pricing strategy, as long as the Enterprise tier delivers real value for customers who choose it. Using a fake "original price" of $999 slashed to $99 when the product was never sold at $999 is manipulation.

Ariely himself noted this tension. The arbitrary nature of anchors means businesses have enormous influence over how customers perceive value. That influence comes with responsibility.

Principles for ethical anchoring

Your highest-tier plan should be a genuine offering, not a phantom designed solely to make the middle tier look cheap. If someone actually selects the Enterprise plan, they should get Enterprise-level value.

If your best customer saw a 340% ROI, it's fair to feature that testimonial. It's not fair to imply that 340% is the typical result. Context matters. Research shows that imperfect, authentic reviews outperform flawless ones -- real numbers with real context build more trust than inflated claims.

If you're anchoring against competitor pricing, use real numbers. Don't inflate them.

And if you're showing a discount, the original price should be a price that was actually charged for a meaningful period.

Anchoring is a tool. Its ethics depend on how you use it. The fact that a random number on a wheel can shift someone's judgment by 20 points should be a reason for care, not exploitation.

Putting anchoring to work on your pricing page

So what does this all add up to in practice? Here is a framework -- five anchoring strategies ranked by impact and ease of implementation.

Strategy 1: Lead with your highest price

Show Enterprise or Premium first. The Suk, Lee, and Lichtenstein research is clear: high-to-low ordering increases average purchase value. Your highest number sets the perceptual frame for everything that follows.

Strategy 2: Engineer a deliberate decoy

Your three-tier structure should include one option that makes the target option look irrationally good by comparison. The decoy doesn't need to be a bad deal. It just needs to be clearly less attractive than the target along the dimensions most customers care about.

Strategy 3: Collect testimonials with specific numbers

Ask customers for specific numbers when collecting testimonials. "How much time did this save?" "What was the percentage improvement?" These numbers become the anchors that shape how future prospects evaluate your product. A tool like PraiseLane, which lets you collect and display testimonials with structured prompts, makes it easy to capture the specific, quantified stories that anchor effectively. For guidance on where to place those testimonials for maximum impact, positioning matters as much as content.

Strategy 4: Anchor against the status quo

If your product replaces a more expensive process (hiring a consultant, using a pricier tool, doing it manually), make that cost visible before showing your price. "$2,000/month for a consultant or $49/month for the same result" is an anchoring statement that does real work. PraiseLane customers often use this approach on their testimonial walls -- featuring quotes that compare old costs to new results, letting the social proof deliver the anchor.

Strategy 5: Be first to set the number

In negotiations, in pricing, in competitive positioning, the party that presents the first number has the anchoring advantage. Don't wait for the customer to form their own reference point. Set it for them.

Tversky and Kahneman showed us that even a wheel of fortune can shape judgment. Ariely showed us that Social Security digits can determine what people pay. The first number always wins. Make sure it's yours.

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Sources:

• Tversky, A. & Kahneman, D. (1974). "Judgment under Uncertainty: Heuristics and Biases." Science, 185(4157), 1124-1131.
• Ariely, D. (2008). "Predictably Irrational: The Hidden Forces That Shape Our Decisions." HarperCollins.
• Ariely, D., Loewenstein, G., & Prelec, D. (2003). "Coherent Arbitrariness: Stable Demand Curves Without Stable Preferences." Quarterly Journal of Economics, 118(1), 73-106.
• Suk, K., Lee, J., & Lichtenstein, D. R. (2012). "The Influence of Price Presentation Order on Consumer Choice." Journal of Marketing Research, 49(5), 708-717.
• Huber, J., Payne, J. W., & Puto, C. (1982). "Adding Asymmetrically Dominated Alternatives: Violations of Regularity and the Similarity Hypothesis." Journal of Consumer Research, 9(1), 90-98.
• Heath, T. B. & Chatterjee, S. (1995). "Asymmetric Decoy Effects on Lower-Quality Versus Higher-Quality Brands: Meta-Analytic and Experimental Evidence." Journal of Consumer Research, 22(3), 268-284.
• SaaStr (2020). "SaaS Pricing Pages Do Seem to Use the Decoy Effect." saastr.com