Price-marked packs: friend or margin trap?
Pricing · 10 June 2026 · 6 min read
Why PMPs exist at all
A price-marked pack does one job brilliantly: it tells a suspicious customer, in the brand's own ink, that your shop isn't ripping them off. For independent retail — where shoppers quietly assume everything costs more than the supermarket — that reassurance shifts real volume. Brands know it, wholesalers know it, and roughly half the crisps, drinks, and confectionery in a typical c-store now arrives with a price printed on the front.
The catch is just as simple: the printed price is a ceiling. Your costs can move; the pack can't.
The honest maths
Take a £1.25 PMP soft drink with a wholesale cost of 89p. Ex-VAT you keep about £1.04, so the margin is roughly 15p a can — about 14%. The plain-pack version of the same drink might sell at £1.65 in your chiller and carry double the cash margin. The PMP sells more units; the plain pack earns more per unit. Which wins depends entirely on how many more units the PMP shifts — and that's a number you can actually measure, not guess.
This is the question to ask line by line: does the PMP at least match the plain pack's cash profit per facing per week? Units per day × pence per unit. If the PMP sells three times the volume at half the margin, it's earning its shelf. If it sells barely more than the plain pack did, the brand is using your shelf to advertise a price you're paying for.
Where PMPs earn their place
- Price-sensitive impulse lines: crisps, chocolate, soft drinks — where the customer has a supermarket number in their head
- Lines where you face a discounter or multiple nearby and need a visible answer
- Slower shops building trust — a PMP-heavy range is a credibility statement while you win regulars
Where they quietly hurt you
- Lines customers would buy anyway: late-night essentials, chilled singles on a hot day — need-it-now demand doesn't check the print
- Categories where your costs rise mid-cycle: the pack says £1.25 long after the maths stopped working
- Premium positions: a PMP next to your artisan or local lines drags the whole fixture's price image down
A practical PMP policy
Run the range in pairs where you can — PMP for the price-checkers, plain pack (bigger or premium variant) for everyone else. Review the PMP lines every quarter against one number: cash profit per facing per week, against the plain alternative. And when a wholesaler offers the same product both ways, do the sum before defaulting to the printed price.
None of this requires heroic analysis if your numbers are live. With till-synced stock data you can pull units per day and margin per line in seconds, and the PMP decision becomes arithmetic instead of philosophy. That's the position you want for every pricing argument in the shop: not "I think", but "I checked".