Understanding cosmetic expiration date and usage periods is crucial for ensuring skin health and product effectiveness.
This article delves into the regulations governing cosmetic expiration in the EU and the US, aiming to provide clear insights for both brands and manufacturers.
Difference Between Cosmetic Expiration Date and PAO
Here, we clarify the two main options for indicating expiration on cosmetic labels:
- Cosmetic Product Expiration Date: This is the date until which the product remains effective, whether it has been used or not.
- Period After Opening (PAO): This indicates the period during which the product remains safe and effective after its first opening.
Cosmetics Expiry Date: EU Requirements
In the European Union, cosmetic products that have a shelf life of over 30 months are required to display the period-after-opening (PAO) rather than a specific expiry date.
The PAO symbol, depicted as an open jar with a numerical value (e.g., “30M”), advises consumers on how long the product remains safe and effective after it has been opened. This regulation ensures that products are used in their optimal condition, preventing issues such as skin irritations or ineffective results.
Moreover, products with a shelf life less than 30 months must clearly display an expiry date, ensuring that consumers are well-informed of the product’s longevity.

Cosmetic Expiration Date: Key Exceptions
It is important to note that the EU regulation provides exceptions for single-use products or those packaged in a way that prevents re-opening. These products do not require a PAO marking, as they are intended to be used immediately and entirely upon opening, ensuring maximum hygiene and efficacy.
Cosmetic Expiry Date: FDA Guidelines
Contrasting with EU practices, the U.S. Food and Drug Administration (FDA) does not mandate expiry dates for cosmetics. However, manufacturers must ensure their products are safe for use throughout their intended lifespan. The FDA advises against sharing makeup to prevent infections, recommends proper storage, and emphasizes the importance of discarding products like mascara when they dry out.
Conclusion on Cosmetic Expiration
Both the EU and the US take different but rigorous approaches to cosmetic safety. The EU uses the PAO for products with a shelf life longer than 30 months, while the FDA places the responsibility for setting expiration dates on the provider.
Understanding cosmetic formulations is crucial to ensuring product safety and compliance. By reviewing legal requirements, ingredients, and formulation challenges, it is ensured that cosmetics meet expectations and regulations.
If you need assistance with interpreting these regulations or developing compliant formulas, feel free to contact us.




