What penetration pricing is
Penetration pricing is launching an item below the price you intend to keep, to buy trial and doors quickly, then raising it to the real price once the item has velocity. Bellhouse Crackers, an illustrative 5 oz seeded cracker, went into 512 Albertsons doors at $3.49 with a planned everyday price of $4.49. That is the textbook version of it, and the launch half worked exactly as drawn.
Nobody has ever called me about a launch that worked. The call comes in week 13, when the price goes to the number the P&L was built on. Nine years of funding trade calendars on the brand side taught me that the whole risk of this strategy sits in one week, and that almost nobody models that week before choosing the strategy. The mirror-image approach, launching high and walking the price down, is price skimming, and it fails in a completely different place.
The step-up week
Hold two assumptions through everything below. The retailer takes a 35% margin, so wholesale is 65% of shelf, and Bellhouse COGS is $1.55 a unit. At $3.49 that is $2.27 wholesale and $0.72 of brand contribution per unit. At $4.49 it is $2.92 wholesale and $1.37.
Week 13 is when the shelf tag changes. Per store, per week:
| Period | Shelf price | Units | Retail dollars | Brand contribution |
|---|---|---|---|---|
| Weeks 9-12, intro price | $3.49 | 9.4 | $32.81 | $6.77 |
| Week 13, first at list | $4.49 | 5.1 | $22.90 | $6.99 |
| Weeks 14-15 | $4.49 | 4.7 | $21.10 | $6.44 |
| Weeks 16-26, settled | $4.49 | 6.0 | $26.94 | $8.22 |
Units fell 46% in the first week at list, then kept falling for two more weeks before turning. They settled at 6.0, which is 36% below the intro rate and is the number the plan should have been built on. The overshoot matters operationally: a brand reading week 14 and panicking is reacting to a number that has not finished moving. Give a step-up five weeks before you judge it.
On the brand's own P&L the step-up worked. Contribution per store per week went from $6.77 to $8.22, up 21%, on 36% fewer units. Across 512 doors that is $742 a week, roughly $38,600 a year, bought by giving up a third of the volume.
The number the buyer reads is not the number you read
Run the same four rows from the retailer's side and the sign flips. Category dollars per store per week fell from $32.81 to $26.94, down 18%, and at a 35% margin the buyer's gross profit on the item went from $11.48 to $9.43 a week.
So one price change is a 21% gain to the brand and an 18% loss to the account, in the same weeks, on the same units. Both readings are correct. The step-up is the point where penetration pricing stops being a marketing decision and becomes a negotiation, and walking in without the buyer's version of the arithmetic is how brands end up conceding a permanent deal calendar in the first meeting.
Price expectation lock-in
After week 13, Bellhouse never sold 9.4 units again at any price except $3.49. Weeks where a temporary price reduction put the shelf tag back to $3.49 ran 10.5 units. Everyday weeks at $4.49 ran 6.0. That is what expectation lock-in looks like in a scan file: velocity tracking a price the brand stopped charging.
An item that launches high has a reference price it can step down from and still read as a value. An item that launches low has taught the shelf one number, and the only lever that reproduces the launch rate is putting that number back. Which is exactly what the trade calendar then does.
What penetration pricing costs after the step-up
A deal week here means the shelf tag back at $3.49, funded by the brand at $1.00 a unit off wholesale, which leaves $0.37 of contribution instead of $1.37. Deal weeks run 10.5 units, everyday weeks run 6.0. Watch what happens across the three quarters after the step-up as the sales team defends the velocity number:
| 13-week period | TPR weeks | Units per store | Units on deal | Trade spend per store | Contribution per store |
|---|---|---|---|---|---|
| Weeks 14-26 | 3 | 91.5 | 34% | $31.50 | $93.86 |
| Weeks 27-39 | 5 | 100.5 | 52% | $52.50 | $85.19 |
| Weeks 40-52 | 8 | 114.0 | 74% | $84.00 | $72.18 |
Check the last row: 8 deal weeks at 10.5 units is 84 units, 5 everyday weeks at 6.0 is 30, so 114 units with 84 of them, 74%, sold on deal. Contribution is 84 x $0.37 plus 30 x $1.37, or $72.18.
Now set that quarter against the two alternatives, per store:
| Weeks 40-52 | Units | Trade spend | Contribution |
|---|---|---|---|
| Held at $4.49, no deals | 78.0 | $0 | $106.86 |
| Defended with 8 TPR weeks | 114.0 | $84.00 | $72.18 |
| What the intro price did | 122.2 | $0 | $87.98 |
The defense bought 36 units a store. It cost $84 in trade to buy them, which is $2.33 each, and it gave away $34.68 of contribution on top. A year after launching low, the brand was moving fewer units than the intro price had delivered, at less contribution, and paying $43,008 across 512 doors in a single quarter to stay there. The step-up earned $0.65 a unit and the promo calendar handed most of it back.
This is the disease specific to launching low. A price cut you never intended is hard to reverse for the same reason any discount pricing decision is, but here there is no old regular price to return to, because the low price was the only one the item ever had.
What velocity buys at the first line review
The trade spend above is not stupid, and a page that pretends it is has never sat through a category review. The buyer's spreadsheet reads units per store per week. Held at $4.49, Bellhouse shows 6.0. Defended, it shows 8.8. If the segment's cut line that year is 7.0, one of those items gets re-listed and the other does not, and everything the brand spends in year two depends on which.
That is the honest case for penetration pricing: it buys a velocity number early enough to survive the first line review, and survival compounds. The case falls apart when nobody has decided which number they are managing to. A buyer who also reads share of units on deal sees an item clearing the cut line with 74% of its volume promoted, and prices the next joint business plan accordingly.
Two things worth agreeing internally before the launch price is set. What the everyday rate needs to be at the step-up price, not the intro price, for the item to be worth its facing. And how many deal weeks a year the brand will fund after the step-up, written down, before the first quarter of soft velocity makes that decision on its own.
Where Scout fits
Scout connects your retailer and syndicated data and holds the price series, the unit series and the promoted weeks together per SKU, so a step-up reads as a dated step with units either side of it instead of dissolving into a quarterly average. It will show you the settled rate at the new price, the share of units moving on deal, and what each deal week cost against it.
It measures the price you sold at and what that did to units. It does not set the retailer's shelf price and it does not negotiate the step-up for you. A scan file also records transactions, not intentions: it can show that units settled 36% lower at $4.49, and it cannot tell you what would have happened at $3.99, because that price was never on the tag.
The short version
- Penetration pricing launches below the intended price to buy trial and doors, then steps up. Every risk in it is concentrated in the step-up week.
- Bellhouse lost 46% of its units the first week at list and settled 36% below the intro rate. Brand contribution still rose 21%; the buyer's gross profit on the item fell 18%.
- The item never matched its launch velocity again except in weeks the deal put the intro price back. That is expectation lock-in, and it is readable in POS.
- Defending the velocity number cost $84 a store in one quarter and still left the brand below what the intro price delivered on units and contribution. Decide the deal-week budget before the launch price, not after.