The Decoy Effect: How One Product Can Make Customers Buy Another
Imagine you’re selling three subscription plans:
Basic — $19
Pro — $39
A customer sees the two options and thinks:
“Do I really need to spend $39?”
Then you introduce a third option:
Basic — $19
Pro — $39
Pro Plus — $37, but with fewer features than Pro
Suddenly, the $39 plan doesn’t feel as expensive.
It feels like the obvious choice.
Why?
Because customers aren’t evaluating the $39 price in isolation anymore. They’re comparing it with the $37 option and thinking:
“For only $2 more, I get much more.”
That’s the Decoy Effect — a pricing and choice phenomenon where introducing a strategically inferior option can increase preference for another option.
The effect was formally studied in consumer-choice research by Huber, Payne, and Puto in 1982. Their research showed that adding an asymmetrically dominated alternative could increase the probability of choosing the option that dominates it.
And it’s not just a theoretical idea. Research has examined the effect in online brand choice and even real-world ecommerce sales.
What Exactly Is the Decoy Effect?
The easiest way to understand it is through three choices.
You have:
- A — Your lower-priced option
- B — Your premium option
- C — The decoy
The decoy is designed to be less attractive than B, while still being reasonably comparable to it.
For example:
| Price | Features | |
|---|---|---|
| Basic | $20 | 5 |
| Premium | $40 | 10 |
| Decoy | $37 | 7 |
Without the decoy, customers are simply deciding:
$20 vs. $40
That’s a significant jump.
But once the $37 option appears:
$37 vs. $40
suddenly becomes an important comparison.
The Premium option looks like a much better deal.
That’s the key:
The decoy changes the comparison — not necessarily the product.
Research refers to this as an asymmetric dominance relationship: the decoy is clearly dominated by the target option on relevant attributes, while the target doesn’t similarly dominate the competitor.
Why Does This Work?
Customers rarely evaluate products completely in isolation.
When deciding whether something is worth $40, they don’t necessarily have an objective internal measurement of “$40 worth of value.”
Instead, they ask:
What am I getting compared with my alternatives?
This is why pricing pages are so powerful.
The way you structure the choices can influence how customers perceive value.
Consider these two situations.
Without a decoy
Basic — $20
5 features
Premium — $40
10 features
The customer might think:
“Premium costs twice as much.”
With a decoy
Basic — $20
5 features
Standard — $37
7 features
Premium — $40
10 features
Now the customer might think:
“Why would I pay $37 for Standard when Premium is only $3 more?”
Same Premium product.
Same $40 price.
But a completely different comparison.
That’s the interesting part of the Decoy Effect.
Example: Ecommerce Product Sizes
You don’t need a complicated subscription model to use this idea.
Imagine you’re selling coffee.
- Option 1: Small — $8
- Option 2: Medium — $13
- Option 3: Large — $14
The Medium option can act as the decoy.
The customer now has a very simple thought:
“I’m already spending $13. Why not spend another $1 for Large?”
The Large suddenly feels like the smart purchase.
And you’ve potentially increased the customer’s order value from $8 to $14.
This is one reason carefully structured size and bundle pricing can be so effective.
The Decoy Effect Can Increase AOV
This is where the psychology becomes interesting for ecommerce businesses.
Suppose your store has:
Average Order Value = $42
You introduce a new bundle structure designed to make the higher-value bundle more attractive.
After testing, you see:
Average Order Value = $51
That’s a $9 increase per order.
If you process 2,000 orders per month, that’s:
2,000 × $9 = $18,000
in additional revenue at the same order volume.
But there’s an important catch.
Higher AOV doesn’t automatically mean higher profit.
If that additional $9 of revenue comes with $8 of additional costs, the improvement isn’t particularly exciting.
That’s why you shouldn’t stop at AOV.
You need to look at:
AOV → COGS → Gross Profit → Margin
And, depending on the business model:
Ad Spend → Contribution → Net Profit
The goal isn’t simply to get customers to spend more.
It’s to encourage customers toward more profitable purchases.
The Decoy Should Have a Purpose
A common mistake is thinking:
“I need three products, so I’ll just add another one.”
That’s not really the strategy.
A good decoy should make your target option look better.
For example:
Weak setup
- Basic — $20
- Standard — $30
- Premium — $50
There isn’t necessarily a clear reason for customers to prefer Premium.
More deliberate setup
Basic — $20
Standard — $47
Premium — $50
If Premium offers substantially more value than Standard, the $47 option creates a strong comparison.
The customer may think:
“For $3 more, I get the better package.”
The decoy isn’t necessarily there to generate demand itself.
It’s there to change the perceived value of another option.
The Three-Option Framework
When building a pricing structure, think about three roles:
1. The Competitor
- The option customers might naturally choose.
- $20
- Affordable, simple, lower commitment.
2. The Target
- The option you want to sell more of.
- $50
- Higher margin, higher AOV, or better business value.
3. The Decoy
The option that makes the target look more attractive.
$47
Similar enough to the target to create a comparison, but clearly worse on important attributes.
The customer’s decision changes from:
“Do I want to spend $50?”
to:
“Do I want the $47 option or the $50 option?”
That’s a much easier decision for some customers.
But Does the Decoy Effect Always Work?
No.
And this is important.
The Decoy Effect shouldn’t be treated as a guaranteed conversion hack.
Research has found that the strength of the effect can vary depending on the context, the customer’s existing preferences, and how the options are presented. More recent research also suggests that factors such as attribute salience and risk aversion can influence how strongly consumers respond to a decoy.
In other words:
Adding a third option doesn’t magically make the premium option more attractive.
The comparison has to make sense.
If the decoy is too obviously irrelevant, customers may simply ignore it.
If the price difference is too large, the comparison may not feel meaningful.
If the products are difficult to compare, customers may become confused instead of persuaded.
And if customers already strongly prefer one option, the effect may be weaker.
Don’t Turn Your Pricing Page Into a Maze
There’s another danger.
More choices don’t always mean better choices.
If customers have to analyze 10 different plans with dozens of features, you can create decision fatigue.
The objective isn’t:
“Give customers more options.”
It’s:
“Make the right comparison easy.”
A simple three-option structure can often be easier to understand than a complicated product catalog.
Your customers should immediately understand:
What is cheaper?
What is better?
What is the best value?
Where Can Shopify Stores Use the Decoy Effect?
You can experiment with the concept in several areas.
Product sizes
- Small → Medium → Large
- Make the larger size significantly better value than the middle option.
Bundles
- Starter → Popular → Premium
- Use the middle option to make the Premium bundle more compelling.
Subscription plans
- Basic → Pro → Business
- Create meaningful differences in features and pricing.
Product variations
- Single → Double → Family Pack
- The middle option can make the larger pack appear more economical.
Add-ons
- Basic product → Standard bundle → Premium bundle
- The higher-value bundle can become the target.
The Decoy Effect vs. Simply Discounting
Here’s another reason the concept is interesting.
A traditional promotion says:
“Buy this because it’s cheaper.”
The Decoy Effect works differently.
It says:
“Buy this because, compared with the alternative, it looks like the better value.”
You don’t necessarily need to reduce the price of your target product.
Instead, you change the context around it.
That can be particularly attractive for brands that don’t want to constantly rely on discounts.
