The Panini Effect
Show your product line as an unfinished puzzle and attach rates jump from 20% to 40-50%.
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 3
- Confidence
- 89%
People never grow out of the childhood compulsion to complete a set. If you merely list your products, roughly 20% of customers attach to more than one. If you present the same products as a puzzle or a collection card — showing which pieces they own and which slots are empty — attach rates rise to 40-50%. The mechanism is completion compulsion, and it works in B2B SaaS as well as consumer.
Origin
Named by Madhavan Ramanujam after Panini sticker albums (the football sticker books children collect and complete — not the sandwich). Simon-Kucher tested it with clients in industries as complex as financial services. Starbucks' bingo card is the same mechanism; LinkedIn's profile-completion meter is a cousin.
Core principles
- 01Completion compulsion is a lifelong psychological drive, not a childhood one.
- 02Presentation, not the product line, is the variable — same products, different display.
- 03The empty slots must be visible for the compulsion to fire.
- 04It works on products (cross-sell) and on behaviours (weekly usage puzzles).
- 05It is the first thing customers should see when they enter the product.
How to run it
- 1
Inventory your product set and measure the baseline attach rate
List the products, plans or modules a customer could hold — e.g. six offerings across brokerage, investment and other lines. Measure how many customers currently hold more than one; typically about 20%.
- 2
Reframe the list as a puzzle with visible empty slots
Instead of listing the six products, show them as a set to be completed: these are the ones you have, these are the empty slots. Make it the first thing a customer sees on entering the product.
Pro tip The visual is the intervention. A flat list generates no compulsion; a partially-filled board does.
- 3
Extend the mechanic to behaviours, not just purchases
For consumer businesses — food delivery, ride-hailing — issue a weekly puzzle: take a ride every day, or ride in the evenings. Show what has been completed and what remains.
Pro tip Starbucks launched a bingo card on exactly this principle.
In the wild
A financial services client had six products (brokerage, investment products and others) presented as a list. Only ~20% of customers held more than one. Simon-Kucher tested showing the six as a puzzle where completed products were checked off and the remainder shown as empty slots, surfaced as the first thing a customer sees.
→ Attach rates went up dramatically — 40-50% of customers started taking more products, driven by the compulsion to finish the set.
Starbucks issued a bingo card of purchase and visit behaviours for customers to complete over a period.
→ It applies the same completion compulsion in a consumer setting, changing purchase behaviour by showing customers what they have not yet done.
Common mistakes
Presenting the product line as a flat list
A list gives customers no sense of an incomplete set, so no compulsion fires and attach rates stay stuck around 20%.
Assuming it only works in consumer
It has been tested in some of the most complex B2B SaaS industries, including financial services, with the same lift. B2B buyers are people too.
Is it for you?
Best for
Multi-product companies (B2B SaaS suites, financial services, marketplaces) with a low cross-sell attach rate and a customer-facing home screen.
Not ideal for
Single-product companies with nothing to attach, or where a gamified display would undercut a premium, restrained brand.
From the transcript
“these are empty and that's like the first thing literally people actually see when they come into the product we actually see the attached rates…”
“Starbucks actually launched a bingo card which is the same principle”
From the episode
The art and science of pricing
Madhavan Ramanujam (Monetizing Innovation, Simon-Kucher)