Leaders, Fillers and Killers
Sort every feature into leader, filler or killer to configure packages that unlock segments.
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 94%
Packaging and bundling — not the price number — are how you unlock segments. Every candidate feature or product falls into one of three roles: leaders that people buy the package for, fillers that ride along and add value cheaply, and killers that destroy the bundle's appeal for everyone if included. Killers are not junk; they are things a minority loves intensely, which makes them add-ons, not package contents.
Origin
Madhavan Ramanujam's packaging framework from Monetizing Innovation, taught with the McDonald's Happy Meal: the burger is the leader, fries and Coke are the fillers, and coffee is the killer — nobody wants a double dose of caffeine with a burger, but the minority who do will happily buy coffee as a standalone add-on. The classification is fed directly by the most/least willingness-to-pay questions.
Core principles
- 01Bundling and packaging are the mechanism by which segmentation becomes revenue.
- 02A leader is what people buy the bundle for; a filler is what they'd never buy alone but accept for a marginal price increase; a killer depreciates willingness to pay across the whole customer base.
- 03Killers become add-ons — you sell them separately to the pocket of customers who want them badly.
- 04Rule of thumb: >50% want it = leader; 10-20% want it badly = add-on, not package content.
- 05Naming trap: a 'killer' kills the bundle by being IN it, not by being absent.
How to run it
- 1
Run most/least WTP questions on the feature set
Use the willingness-to-pay conversation to stack-rank features. Must-have / will-pay items rise to the top; nice-to-have items sit in the middle; don't-need / won't-pay items sink.
- 2
Classify: leaders from the top of the rank
The must-haves and table stakes — anything more than ~50% of the target segment wants — are your leader products or features. These anchor the package and are the reason a segment buys.
- 3
Classify: fillers from the middle
Nice-to-have and might-consider features are fillers. Bundle them with the leader so that for a marginal price increase the customer takes things they would never have bought standalone.
Pro tip Fries and a Coke are the Happy Meal's fillers — nobody was buying them alone, but 'a dollar or two more' converts them.
- 4
Classify: killers, and pull them out as add-ons
Anything only 10-20% of customers want — but want badly — is a killer inside the package and a profitable add-on outside it. Price and list it separately, or reserve it for an advanced package built for that minority.
Pro tip The intensity of desire in the minority is what makes a killer a good add-on: they will pay standalone.
Watch out Bundle a killer in and it depreciates willingness to pay across the entire customer base to the point where no one wants the bundle.
- 5
Configure packages per segment
Assemble leader + fillers per need-based segment, with killers available as add-ons, so each package is a product for a segment rather than one product positioned at several.
In the wild
The Big Mac is the leader — the reason people go. Fries and Coke are the fillers: most buyers wouldn't have bought them alone, but for a dollar or two more they take the Happy Meal. Coffee is the killer: put it in the bundle with a burger, fries and a Coke and it kills the bundle for everyone.
→ Coffee is listed separately on the menu as an add-on, so the minority who genuinely want coffee with a burger buy both standalone — and the bundle keeps its appeal for everybody else.
Unlimited ticket types (general admission, VIP) is a leader for professional event organizers and irrelevant for a wine-club meetup. Rather than giving everyone unlimited types, the entry plan is restricted to a single ticket type.
→ The restricted product could be priced cheaper as an essentials plan, while the professional segment paid up for the leader feature they actually valued.
Common mistakes
Cramming everything into one package
Including a killer feature drags down willingness to pay for the entire bundle. More is not better — a bundle is only as attractive as its worst-fitting component.
Misreading 'killer' as a must-have
It is easy to assume a killer is a deal-killer if omitted. It is the opposite: a killer kills the deal when it is included. Killers belong in the add-on menu.
Classifying by internal opinion rather than WTP data
Without most/least willingness-to-pay data, teams guess at leaders and routinely mistake their favourite feature for one.
Is it for you?
Best for
Product and pricing teams designing plans, tiers, bundles, or an add-on menu for a multi-segment product.
Not ideal for
Single-SKU products where packaging complexity would confuse buyers more than it captures value.
From the transcript
“we call it the leaders fillers and Killers exercise or framework”
“if 10 to 20 of your customers want something and they really want it badly that's usually an add-on”
“if more than 50 of people want something that's a leader product”
“Coke and a burger that's just gonna kill the bundle no one needs a double dose of caffeine”
From the episode
The art and science of pricing
Madhavan Ramanujam (Monetizing Innovation, Simon-Kucher)