Most makeup and skin-care products can go bad after opening, and shifts in smell, texture, color, or feel are common warning signs.
Cosmetics do expire, but the date is not always printed in a way that feels obvious. Some products have a stamped date. Others use the open-jar mark, such as 6M, 12M, or 24M, to show how long the product should stay safe after you first open it. Then there are products with no clear date at all, which is where people get stuck.
If you want the simplest rule, trust three things in this order: the package instructions, the product’s condition, and how long it has been open. A lipstick that still looks and smells normal may last far longer than a mascara tube that starts drying out after a few months. The type of formula, the packaging, and the way you store it all change the answer.
When Do Cosmetics Expire? What Labels Mean
There are two label systems you’ll see most often. One is a fixed expiration date or “best used before” date. The other is PAO, short for period after opening. In the European Union, products with a minimum durability longer than 30 months often use the open-jar PAO symbol instead of a fixed date. The rule is spelled out in EU cosmetic labelling law.
In the United States, cosmetics do not have to carry a shelf-life date on the label. The FDA says makers are still responsible for selling products that stay safe under normal use. The agency also notes that eye-area products tend to have shorter lives, and mascara is often tossed two to four months after purchase because the wand keeps picking up microbes and carrying them back into the tube. That guidance appears in the FDA’s page on shelf life and expiration dating of cosmetics.
So if your product shows a date, follow it. If it shows a PAO mark, start counting from the day you opened it. If it shows neither, the safest move is to watch the formula closely and be stricter with eye makeup, liquid products, and anything you dip your fingers into.
Cosmetic Expiration Dates And PAO Symbols
The open-jar mark is easy to miss. It usually sits on the back or bottom of the package and looks like a small jar with a number and letter inside or beside it. A 12M mark means the product should stay fit for use for 12 months after opening. A 24M mark means 24 months after opening.
This is not a promise that the product turns bad on the first day of month 13. It is a practical use window. Your own storage habits can shorten it. Heat, steam, sunlight, dirty fingers, wet sponges, and double-dipping all speed up breakdown.
Fixed expiration dates matter most when the product has a shorter unopened life, or when it is also regulated as a drug, such as acne treatment or sunscreen. If makeup or moisturizer carries SPF, treat the printed date with extra care. Once the date passes, the UV claim may no longer hold up the way you expect.
What Makes Cosmetics Go Bad Faster
Three things age cosmetics faster than most people think: moisture, air, and repeated contact. A tightly sealed powder stored in a cool drawer can stay usable for a long stretch. A cream jar opened with damp fingers in a steamy bathroom may spoil much sooner.
The FDA notes that warm or damp storage can help microbes grow, and that poor handling can contaminate products during use. That is one reason finger-dip jars usually deserve more caution than pumps or squeeze tubes. The agency’s page on microbiological safety in cosmetics also warns against adding water or saliva to products and against sharing makeup.
Packaging matters too. Airless pumps give formulas less contact with air and hands. Pencil products can be sharpened, which trims off the outer layer. Pots and jars expose the whole surface every time you open them. That does not make them bad products. It just means they need cleaner handling and a shorter leash.
Typical Shelf Life By Product Type
No chart can replace the brand’s own instructions, but common shelf-life ranges still help. These ranges fit the way many products behave once opened under normal home use.
| Product Type | Common Use Window After Opening | What Usually Ends Its Life |
|---|---|---|
| Mascara | 2 to 4 months | Drying, clumping, rising germ load from the wand |
| Liquid eyeliner | 3 to 6 months | Drying, eye-area contamination risk |
| Foundation, liquid concealer | 6 to 12 months | Separation, smell shift, pump or doe-foot contact |
| Cream blush, cream shadow | 6 to 12 months | Texture change, finger contact, oil breakdown |
| Lipstick, lip liner | 12 to 24 months | Rancid smell, sweating, wax changes |
| Pressed powder, powder blush, powder shadow | 12 to 24 months | Hard pan, odor, glaze from oils on brushes |
| Skincare serums and creams | 6 to 12 months | Oxidation, color shift, weak performance |
| Natural or lightly preserved formulas | Often shorter than standard products | Microbial growth, fast scent and texture change |
These are broad ranges, not hard law. A clean powder compact can stay fine longer than a jar cream with no spatula. A product with a strong preservative system may stay stable longer than one marketed as “clean” or preservative-light. Then again, if the color, smell, or feel changes, the clock is done, even if the label window says there is time left.
Signs A Cosmetic Has Expired
Expired cosmetics rarely announce themselves with a giant warning. Most fail in small ways first. The easiest clues are changes you can sense right away.
Changes You Can See
Look for separation, curdling, shrinking away from the sides of the container, a dry crust around the opening, or color darkening. Liquids may turn watery. Creams may look grainy. Powders may form a stubborn hard layer that will not pick up well on a brush.
Changes You Can Smell
A sour, waxy, stale, or “off” smell is a classic red flag. Fragrance can mask early spoilage, so trust even small shifts. If the product no longer smells the way it used to, stop using it.
Changes You Can Feel
Watch for stinging, itching, sudden eye watering, rough drag on the skin, or a greasy film that was never there before. A product can be breaking down even when it still looks decent in the tube.
Eye products deserve stricter rules than almost anything else. If mascara, liner, or eye cream starts acting odd, toss it. Eye irritation is not worth stretching another week from a nearly empty tube.
Storage Habits That Change Shelf Life
People often shorten a product’s life without realizing it. The bathroom is the usual trouble spot. Steam from showers, quick temperature swings, and damp hands all work against stability.
A cool, dry drawer is usually better than a window ledge or a shelf beside the sink. Keep lids closed tight. Use clean brushes and wash them on schedule. If a product comes with a spatula, use it. If a bottle has a pump, keep the nozzle clean and do not pry the top off just to “get the last bit” unless you plan to finish it right away.
| Habit | Effect On Product | Better Move |
|---|---|---|
| Keeping makeup in a hot bathroom | More moisture and heat exposure | Store in a cool, dry drawer |
| Dipping fingers into jars | Adds oils and microbes | Use a clean spatula or washed hands |
| Sharing mascara or lip products | Passes germs between users | Keep personal products personal |
| Adding water to revive products | Weakens preservatives and shifts formula | Replace the product |
| Leaving caps loose | More air exposure and drying | Seal tightly after each use |
| Using dirty brushes and sponges | Moves grime back into the product | Wash tools often and let them dry fully |
When To Toss Cosmetics Right Away
Do not try to rescue a product that has mold, a sharp bad smell, visible separation that will not remix, or a new sting around the eyes. The same goes for products tied to a rash, swelling, or infection. Stop using them at once.
You should also toss products after an eye infection, cold sore, or any skin issue that could have contaminated the applicator. That means mascara, liners, lip products, and anything that touched the affected area. It feels wasteful, but keeping it can keep the problem going.
A Smart Rule For Deciding
If the package has a printed expiration date, follow it. If it has a PAO mark, count from opening day. If it has neither, use a simple common-sense test: does it look the same, smell the same, feel the same, and still perform the same? If the answer is no, it is done.
For people with a large collection, writing the opening month on the bottom with a marker helps a lot. That one small habit turns guesswork into a cleaner routine. You do not need to throw out every product on a rigid calendar. You just need a system that keeps old, risky, or clearly degraded products out of daily use.
References & Sources
- U.S. Food and Drug Administration (FDA).“Shelf Life and Expiration Dating of Cosmetics.”Explains that U.S. law does not require most cosmetics to list expiration dates and notes that eye-area products, including mascara, often have shorter use windows.
- U.S. Food and Drug Administration (FDA).“Microbiological Safety and Cosmetics.”Details how contamination can happen during use and storage, and outlines handling habits that lower the risk.
- European Union.“Regulation (EC) No 1223/2009 on Cosmetic Products.”Sets the labelling rule for minimum durability and the period-after-opening symbol used on many cosmetic products sold in the EU.