Does Sunscreen Expire? Why It Matters
Expired sunscreen loses SPF protection and can burn you. Learn how long sunscreen lasts, how to read its date, and when to throw it out.
4 min read · Updated July 2026
Sunscreen expires — and it matters more
Unlike most cosmetics, an expired sunscreen doesn't just underperform cosmetically — it fails at its one job. Degraded UV filters let through more radiation, so 'expired SPF 50' can behave like a much weaker product and lead to burns.
Regulators require sunscreen to stay at its stated SPF for up to three years, so most bottles carry an explicit expiry date or a batch code you can decode.
How long it lasts
- Unopened: up to 3 years from manufacture if stored cool and dark.
- Opened: 12 months is a safe rule, sooner if it lived in a hot car or beach bag.
Heat is the enemy. Repeated high temperatures break down the filters faster than time alone.
Signs your sunscreen is done
Toss it if the texture has separated, gone watery or grainy, changed colour, or smells off. Any of these means the emulsion has broken and the protection is unreliable.
If there's no printed expiry, decode the batch code for the manufacture date and count forward using the shelf life and PAO.
FAQ
Is it dangerous to use expired sunscreen?
It won't poison you, but it can leave you unprotected and lead to sunburn and long-term skin damage. For sun protection specifically, replace anything past its date.
How should I store sunscreen to make it last?
Keep it out of direct sun and heat. Don't leave it in a hot car or on the sand all day — store it in the shade or a cool bag.