What you'll understand by the end of this lesson
- Why adding a third option to a two-option page can increase sales of one specific option
- What "asymmetric dominance" means and why it matters for pricing design
- How to identify whether your current pricing is accidentally working against you
- How the Decoy Effect connects to Anchoring and Framing
The principle in plain English
When people choose between two options, they evaluate each one independently — weighing price, features, and value against their own sense of what's reasonable.
Introduce a third option that is clearly inferior to one of the first two — and suddenly the comparison changes. People stop evaluating options independently and start comparing them to each other. The inferior option makes the superior one look like an obvious win.
This is the Decoy Effect. The third option isn't there to sell. It's there to reshape how the other options are judged.
A simple example
You're choosing between two popcorns at a cinema:
- Small: £3
- Large: £7
Most people weigh up whether the jump from £3 to £7 is worth it. Some buy small. Some buy large.
Now add a decoy:
- Small: £3
- Medium: £6.50
- Large: £7
Suddenly, Large looks like an incredible deal. For just 50p more than the Medium, you get a significantly bigger portion. Medium exists not to be purchased — but to make Large feel like the obvious rational choice.
This is asymmetric dominance: the decoy is clearly worse than the target on at least one important dimension, which makes the target dominate it.
Where it shows up on websites
Pricing pages
The most common use of the Decoy Effect online is three-tier pricing.
A typical setup:
- Basic — £9/month — limited features
- Pro — £29/month — full features (this is the target)
- Enterprise — £28/month — fewer features than Pro, similar price
Enterprise is the decoy. Nobody buys it. But it makes Pro look like an obvious choice: more features, for just £1 more. Without the decoy, Pro has to justify its £20 jump from Basic on its own terms. With the decoy, it only has to beat a near-identical alternative by £1.
Subscription tiers
Streaming services, SaaS tools, and newsletter platforms all use this. A "mid-tier" plan with odd pricing and a strange feature set is rarely the best deal for any particular user. But its presence reframes the other two options so that one looks obviously right.
Service packages
Agencies and consultants often offer three service tiers. The middle tier — sometimes called the "recommended" package — is typically the target. The premium tier is priced close enough to the middle that it looks expensive by comparison. The entry tier lacks enough to make the middle feel worth paying for.
The decoy doesn't need to be obviously bad. It just needs to be clearly worse than the target on the dimension that matters most to the buyer — usually value per pound, or a key feature. A decoy that's too obviously inferior loses credibility and draws attention to the trick. A decoy that's subtly inferior just shifts the comparison naturally.
The comparison shift
Without a decoy, a visitor evaluating two options asks: which of these is right for me?
With a well-placed decoy, the question becomes: which of these two similar options is the better deal?
That's a much easier question to answer — and it's a question the seller has designed so that one option wins clearly.
This is why the Decoy Effect is so powerful in pricing: it doesn't just influence the decision, it changes the type of decision the visitor is making.
The connection to Anchoring and Framing
These three principles often work together on pricing pages.
Anchoring sets the first reference point — if the highest plan is shown first, everything else feels cheaper relative to it.
Framing determines how each plan is described — whether the price is presented as a cost or an investment, and what the key benefit emphasises.
The Decoy Effect shapes the comparison — by introducing an option that makes one choice look clearly superior to its nearest alternative.
A well-designed pricing page uses all three. The order, the language, and the tier structure are each doing deliberate work.
The CRO audit
Look at your pricing page and ask:
1. Do you have three tiers?
If you have two, visitors evaluate each independently. If you have three, make sure the third tier is doing deliberate comparison work — not just adding complexity.
2. Which plan do you most want to sell?
That's your target. Now look at the plan nearest to it in price. Is it clearly worse on the dimension that matters to your buyers? If the nearby plan offers better value than your target, the comparison is working against you.
3. Is the target easy to identify as the winner in a side-by-side comparison?
The visitor shouldn't have to work to figure out which plan wins. The decoy should make the target look like the obvious rational choice at first glance.
The Decoy Effect works best when buyers are comparing similar options. If your tiers are so different that they appeal to completely different audiences, the effect weakens — buyers in each segment will evaluate the tier relevant to them, not compare across all three. The decoy only works when it creates a close comparison.
A SaaS tool offers: Basic at £9/month, Pro at £29/month, and Enterprise at £28/month with fewer features than Pro. What role does Enterprise play?
You know how to use a third option to make your preferred plan look like the obvious choice. But what makes visitors trust that choice in the first place — before they've even compared the tiers?