Monthly report
K-beauty prices September 2026: what moved at YesStyle, Stylevana and Olive Young US
We checked 63 cells across 12 rounds. 87.3% of prices didn't move. When they did, it was mostly at Stylevana.
4 September 2026 to 30 September 2026. Checkout prices only — we don't distinguish a sale price from a regular one. Prices shown for US delivery.
Biggest drops
| Product | Store | 4 September 2026 | 30 September 2026 | Change |
|---|---|---|---|---|
| mixsoon Bean Essence | Stylevana | $21.99 | $17.50 | -20.4% |
| COSRX Advanced Snail 96 Mucin Power Essence | Stylevana | $20.00 | $17.50 | -12.5% |
| COSRX Low pH Good Morning Gel Cleanser | Stylevana | $11.20 | $9.80 | -12.5% |
| Some By Mi AHA-BHA-PHA 30 Days Miracle Toner | YesStyle | $17.55 | $16.80 | -4.3% |
| Isntree Hyaluronic Acid Watery Sun Gel SPF50+ | Stylevana | $14.64 | $14.29 | -2.4% |
Biggest rises
| Product | Store | 4 September 2026 | 30 September 2026 | Change |
|---|---|---|---|---|
| VT Cosmetics Reedle Shot 100 | Stylevana | $23.39 | $27.65 | +18.2% |
| Abib Gummy Sheet Mask Heartleaf Sticker | YesStyle | $28.00 | $32.00 | +14.3% |
| Laneige Lip Sleeping Mask (Berry) | Stylevana | $10.89 | $11.11 | +2% |
Store behaviour
| Store | Times repriced | Down | Up |
|---|---|---|---|
| YesStyle | 15 | 8 | 7 |
| Stylevana | 46 | 26 | 20 |
| Olive Young US | 4 | 2 | 2 |
Olive Young US prices were nearly static (4 moves); Stylevana repriced most often.
Where the gaps are at month end
| Product | Cheapest | Most expensive | Gap |
|---|---|---|---|
| Laneige Lip Sleeping Mask (Berry) | $11.11 Stylevana | $24.00 Olive Young US | 116% |
| Laneige Water Sleeping Mask | $16.66 Stylevana | $33.00 Olive Young US | 98% |
| SKIN1004 Madagascar Centella Ampoule | $14.50 Stylevana | $25.00 Olive Young US | 72% |
| mixsoon Bean Essence | $17.50 Stylevana | $26.50 Olive Young US | 51% |
| COSRX Low pH Good Morning Gel Cleanser | $9.80 Stylevana | $12.60 Olive Young US | 29% |
8 of 28 comparable products were tied at the cheapest store at month end; 5 sat past a 20% gap. Who is actually cheapest →
Store changes this month
- 19 September 2026, Olive Young US: Isntree Hyaluronic Acid Watery Sun Gel: Olive Young US sells a "Daily Sun Gel" with a different filter set
- 17 September 2026, YesStyle: YesStyle US shipping table revised again (effective 15 September 2026)
- 8 September 2026, Olive Young US: SKIN1004 Water-Fit Sun Serum: Olive Young US lists a different formula under a near-identical name
- 4 September 2026, YesStyle: YesStyle US shipping table (effective 3 September 2026)
- 4 September 2026, Stylevana: Stylevana US shipping, as read on 4 September 2026
- 4 September 2026, Olive Young US: Olive Young US shipping, as read on 4 September 2026
- 3 September 2026, Olive Young Global: Olive Young Global does not ship to the US mainland
Store changes we've recorded →
Roster changes
- Removed, 3 September 2026: Torriden DIVE-IN Low Molecular Hyaluronic Acid Multi Pad
- Removed, 18 September 2026: Mediheal N.M.F Aquaring Ampoule Mask
- Removed, 18 September 2026: Torriden DIVE-IN Low Molecular Hyaluronic Acid Serum
- Removed, 18 September 2026: numbuzin No.3 Skin Softening Serum
- Added, 3 September 2026: SKIN1004 Madagascar Centella Ampoule
- Added, 17 September 2026: Anua 3 Ceramide Panthenol Moisture Barrier Cream — no baseline this month, first appears in next month's report.
- Added, 17 September 2026: beplain Mung Bean pH-Balanced Cleansing Foam — no baseline this month, first appears in next month's report.
- Added, 17 September 2026: Medicube Collagen Night Wrapping Mask — no baseline this month, first appears in next month's report.
How to read this
- Every figure above compares 4 September 2026 — the first day this round every product we track had a real price at YesStyle, Stylevana and Olive Young US — against 30 September 2026, the most recent check of that cell by then. Earlier days that month are a setup period and aren't used as a baseline.
- We record the price at checkout, sale or not — this report doesn't separate the two.
- Prices are for US delivery, in USD.
- Checked on: 4 September 2026, 6 September 2026, 9 September 2026, 14 September 2026, 17 September 2026, 18 September 2026, 19 September 2026, 21 September 2026, 24 September 2026, 27 September 2026, 28 September 2026, 30 September 2026.
- Store shipping and catalogue changes: store changes we've recorded →.
Next report: 1 November.
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