Best Serum by Cost Per Use (2026)
We analyzed 8 popular serums to find which ones give you the most value per application. The average serum costs $0.90 per use — but there's a wide range from budget-friendly to luxury.
Serum Comparison: Ranked by Value
| # | Product | Price | Size | Cost/Use | Lasts |
|---|---|---|---|---|---|
| 1 | The Ordinary Niacinamide 10% + Zinc 1%4.3/5 | $6 | 30ml | $0.10 | 2mo |
| 2 | The Ordinary Hyaluronic Acid 2% + B54.5/5 | $7 | 30ml | $0.12 | 2mo |
| 3 | Paula's Choice 2% BHA Liquid Exfoliant4.5/5 | $35 | 118ml | $0.15 | 7.8mo |
| 4 | CeraVe Skin Renewing Vitamin C Serum4.3/5 | $19 | 30ml | $0.32 | 2mo |
| 5 | La Roche-Posay Retinol B3 Serum4.4/5 | $45 | 30ml | $0.75 | 2mo |
| 6 | Drunk Elephant C-Firma Fresh Day Serum4.2/5 | $80 | 30ml | $1.33 | 2mo |
| 7 | Sunday Riley Good Genes All-in-One Lactic Acid Treatment4.5/5 | $85 | 30ml | $1.42 | 2mo |
| 8 | SkinCeuticals C E Ferulic4.7/5 | $182 | 30ml | $3.03 | 2mo |
Our Analysis
Best Value: The Ordinary Niacinamide 10% + Zinc 1%
At just $0.10 per use, The Ordinary Niacinamide 10% + Zinc 1% offers the lowest cost per application in our comparison. It lasts approximately 2 months with daily use.
Read full guide →Premium Pick: SkinCeuticals C E Ferulic
At $3.03 per use, this is the most premium option. While the cost per use is higher, many users consider the formula and finish worth the investment (4.7/5 rating).
Read full guide →Serum Expiration
Serums, especially those with active ingredients like Vitamin C, degrade with exposure to air and light. Watch for color changes or an off smell.
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