Face sunscreen: raising the price costs half of what it gains
I measured 2,735 price changes across 183 face sunscreens and compared each one against the products that held their price. Both directions move rank by less than the price change itself, and both ranges stay clear of one for one — the first category in this series where that holds in both directions. An increase of 10 percent cost about 5 percent of rank. This is the weakest price response I have measured so far.
In short
- A 10 percent price increase cost about 5 percent of rank (range 4 to 7). Demonstrably less than the price gained — the mildest increase penalty of the three categories measured so far.
- A 10 percent discount improved rank by about 7 percent (range 5 to 9). Also demonstrably less than the discount gives away in margin.
- Rank does move reliably at every discount depth — it simply moves less than the price does. Price is a lever here, just a weak one.
- No segment pattern. Unlike face serums and moisturisers, the budget, mid and premium groups show no demonstrated difference for discounts in this category.
- Competitors answer about 11 percent more often than their own repricing rhythm would produce, usually within a day. Real, but modest.
Price cuts
A 10% cut improved rank by roughly 5 to 9 percent.
Price increases
A 10% increase cost roughly 4 to 7 percent of rank.
The same price move, three price groups, no clear difference
The category figure is the finding here, and it is unusually clean: both directions sit well below one for one, and neither range reaches it. A discount buys about seven tenths of what it costs in price, an increase costs about half of what it gains. For anyone deciding whether to pass on rising costs in this category, that is the number that matters.
The price groups tell no story, and that is worth saying plainly. For discounts, all three ranges cross one for one and all three overlap each other — the budget, mid and premium thirds cannot be distinguished. Only on the increase side is something visible: the mid and premium groups are demonstrably below one for one (0.42 and 0.51), while the budget group is not (0.78, range reaching 1.04).
This matters beyond sunscreen. In the two beauty categories measured before this one, the cheapest third was the least price-responsive, and in face serums that difference was demonstrated. Here it does not appear. Two categories showing a pattern and a third not showing it is how patterns behave when they are real but not universal — and it is why I report each category on its own rather than carrying a rule forward.
The full picture
01 · 1 · Does the size of the discount matter?
Yes, steadily — the deeper the cut, the further rank moves.
Rank after price changes of different sizes
All six sizes produced a demonstrable effect: 11 percent better rank for a small discount, 20 percent for a moderate one, 29 percent for a quarter off or more. The increase side is the mildest of the three categories so far — 9 percent worse rank for a small rise, 24 percent for a large one, against 12 and 32 percent in moisturisers and 17 and 37 percent in serums.
That is the same finding as the category figure, seen from the other side. Rank reacts to every discount depth, reliably. It just reacts less than the price change that caused it, which is why the ratio stays below one for one while every individual step stays clear of "no change".
02 · 2 · Will competitors follow?
Somewhat, and quickly — but less than it looks.
Time until the first competitor answers a price cut
Across 4,454 price changes from 198 products, rivals answered a cut 11 percent more often than their own repricing rhythm would produce, and an increase 14 percent more often. Six in ten answers land on the same day and most of the rest on the next.
03 · 3 · Where could a new product enter?
Three price ranges qualify — and the safest read is €12.44 to €14.90.
Competition and demand by price range
Three of twelve price ranges clear the demand baseline, and the scoring picks the lowest of them: €7.25 to €8.68, where half the products rank in the top third, the typical review count is only 92 and prices hold for about sixteen weeks. Both recent entrants there are winning or building.
But that band holds three products, and its entrant record rests on two launches. I would read €12.44 to €14.90 as the more robust corridor: 29 products, the highest demand evidence in the category at 52 percent in the top third, a typical review count of 170, and six judged entrants of whom four are already winning. It scores lower because it is more crowded — which is exactly what makes its evidence stronger.
The most crowded ranges are the least attractive. €14.90 to €17.84 holds 46 products with a typical review count of 467 and demand below the baseline. That is the wall of this category, and it sits directly above the corridor.
For the category as a whole: of 279 priced products, 92 launched within the last two years, 22 have reached the top third and 4 disappeared. Sunscreen takes newcomers more readily than moisturisers do.
04 · 4 · What the market looks like underneath
Seasonal, and occasionally absurd.
Of 4,537 price changes found, 788 had another change from the same product running in the same window and 167 coincided with a stockout — the latter is what a seasonal category looks like at the end of its season, when products sell out rather than get discounted. Another 301 coincided with a burst of new reviews, and 203 events were dropped because the product was already sliding before the price came down.
The observed price changes run from 96 percent off to an increase of more than twenty-five fold. Extremes like that are not pricing decisions; they are listings returning from a nominal price after being unavailable, and they sit far outside the range any of the figures above are read from. 46 of the 325 products do not sit in the face-sunscreen branch of Amazon's own category tree, and 49 of their events are excluded from every figure here.
Data appendix
325 products on amazon.de, taken from the face-sunscreen listing and then narrowed: no body products or sprays, no sticks or roll-ons, no tinted or BB creams, no self-tanners or after-sun, no oils, no lip, children's or men's lines, no multipacks or gift sets, nothing below €6 or above €60, container sizes between 15 and 100 ml where stated, and at most four listings per brand so that a single catalogue cannot dominate the control groups. Only products with at least 20 reviews were kept. Products that Amazon does not place in this branch are flagged automatically and excluded from all figures. The product list is available on request for methodological review.
A note on seasonality: sunscreen is a seasonal category, and price changes cluster in spring and summer. The analysis uses the full available history, so several seasons are covered and the seasonal swing is carried by the control group as well as by the product that changed price — that is the point of comparing against controls. What the season does leave behind is the elevated number of stockout exclusions noted in section 4.
| Step | Events | Removed because |
|---|---|---|
| Price changes found | 4,537 | at least 5% and €0.30, held for 7 days |
| Gaps in the price history | −102 | the change cannot be located precisely |
| Too little ranking data | −341 | less than 70% of days covered |
| Overlapping price change | −788 | another change from the same product in the window |
| Deal or coupon markers | −0 | none recorded in this set |
| Stockout signals | −167 | rank moves for availability, not price |
| Burst of new reviews | −301 | more than 10% and at least 15 new reviews |
| Listing too young | −157 | less than 60 days of history |
| Too few control products | −101 | fewer than five comparable products held their price |
| Passed every check | 2,985 | an event can fail several checks, so the removals sum to more than the difference |
| Used for the figures | 2,735 | from 183 products, after removing 203 with a pre-existing trend and 49 from other category branches |
price change ≥ 5% and ≥ €0.30, held ≥ 7 days · comparison: 14 days before, days 3–14 after · control products: same category, price moved less than 2%, at least 5 of them · rank coverage ≥ 70% of days · listing older than 60 days · review burst = more than 10% and at least 15 new reviews · ranges are 90%, from a bootstrap clustered by product
Observed price changes: −96.5% to +2,538.6%. The extreme upper end comes from listings returning to a nominal price after being unavailable; the figures above are read only from the range where changes are dense.
Limits — I measure the ranking, not units sold, in the 14 days after a price change. Results hold only for the price range actually observed. Every figure is for the category as a whole or for one of its three price groups, never for an individual product. Where a range touches the level at which nothing happens, I say so instead of quoting a number.
- 325 products
- 4,537 price changes found
- 2,985 passed every check
- 2,735 used for the figures
- 183 products in the fit set
- ref ea0f52ca
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