Beyond the Obvious Expirations
Most people track the big expirations: driver's license, passport, car registration, insurance. These come with built-in reminders — a letter from the DMV, a flag at airport security.
But there is a whole category of items with expiration dates that fly completely under the radar. Some are safety-critical, others can cost you money, and all are easy to overlook because nobody sends you a reminder. Here are ten that might surprise you.
1. Fire Extinguishers
Typical lifespan: 5-12 years
That fire extinguisher on your kitchen wall is not a permanent fixture. An expired one may fail when you need it most.
- Disposable extinguishers: Replace every 12 years from the manufacture date on the label
- Rechargeable extinguishers: Require professional inspection every 6 years and hydrostatic testing every 12 years
- Monthly visual check: Verify the pressure gauge is in the green zone and the pin and tamper seal are intact
Tip: Flip your fire extinguisher over and look for the manufacture date. If it is more than 10 years old and never inspected, replace it. A $30-$50 extinguisher is cheap insurance.
2. Car Seats (Child Safety Seats)
Typical lifespan: 6-10 years from manufacture date
Car seats expire. Over time, the plastic shell degrades from temperature fluctuations and UV exposure, harness webbing weakens, and safety standards evolve.
- The expiration date is printed or molded into the bottom or back of the seat
- Expired car seats should not be donated or sold — they should be recycled or disposed of
- Car seat trade-in events (Target, Walmart) offer discounts when you turn in an old one
Tip: When you install a new car seat, write the expiration date on tape and stick it somewhere visible. Six years from now, you will not remember where to find the molded date stamp.
3. Smoke Detectors and Carbon Monoxide Detectors
Typical lifespan: 10 years (smoke) / 5-7 years (CO)
Replacing batteries is not enough. The sensors degrade over time and become less responsive.
- The manufacture date is printed on the back of the unit
- Combination smoke/CO detectors should be replaced based on the shorter CO detector lifespan (5-7 years)
- Some newer models have sealed 10-year batteries and are designed to be replaced as a complete unit
Tip: Write the installation date on each detector with a permanent marker. Ten years from now, you will not remember when you installed it.
4. First Aid Kits
Typical lifespan: Individual items vary, check annually
Many items inside first aid kits have their own expiration dates, and an expired kit can give you false confidence.
Items that expire:
- Adhesive bandages: Adhesive degrades after 3-5 years
- Antibiotic ointment: Expires 1-3 years after opening
- Antiseptic wipes: Solution evaporates; sealed packets last 1-2 years
- Medications (aspirin, ibuprofen, antihistamines): Check printed dates
- Cold packs: Chemical reaction becomes unreliable after 2-4 years
Annual audit: Go through your kit once a year. Replace expired items, restock anything used, and check that packaging is intact.
5. Sunscreen
Typical lifespan: 3 years from manufacture, or as labeled
After three years, active ingredients break down and the product may not provide adequate UV protection. Using expired sunscreen is arguably worse than using none because it creates a false sense of protection.
- Some sunscreens print an expiration date; if there is none, it expires 3 years from purchase
- Heat accelerates degradation — sunscreen stored in a hot car degrades faster
- Write the purchase date on the bottle when you buy it
- Discard any sunscreen that has changed color, consistency, or smell
6. Bicycle Helmets
Typical lifespan: 3-5 years, or immediately after any impact
The foam core (EPS) degrades over time from sweat, UV exposure, and temperature changes. A five-year-old helmet may not absorb impact energy as effectively as a new one.
- Replace after any crash, even if there is no visible damage — EPS foam does not recover after compression
- The manufacture date is usually on a sticker inside the helmet
- If straps and buckles feel loose or brittle, replace the helmet
Tip: This applies to all protective helmets — motorcycle, skateboard, ski, equestrian. If you cannot find a manufacture date and do not remember when you bought it, replace it.
7. Water Filters
Typical lifespan: 2-6 months for pitcher filters; 6-12 months for whole-house
An expired or saturated filter can actually release trapped contaminants back into your water, making it worse than unfiltered.
- Brita/PUR pitchers: Every 2 months (40 gallons)
- Refrigerator filters: Every 6 months
- Faucet-mounted: Every 3 months (100 gallons)
- Under-sink reverse osmosis: Sediment filter every 6-12 months, RO membrane every 2-3 years
Tip: When you install a new filter, write the replacement date on tape and stick it on the housing. Indicator lights are helpful but not always accurate.
8. Surge Protectors
Typical lifespan: 3-5 years, or after a significant surge event
Surge protectors contain components (MOVs) that absorb voltage spikes. Each event degrades them, and eventually your "surge protector" is just a power strip.
- No visual indicator on most models to show remaining protection capacity
- Some higher-end models include a protection indicator light
- Lightning strikes, even distant ones, degrade MOVs significantly
- After any major power event, consider replacing surge protectors connected to expensive equipment
Tip: Label each surge protector with the purchase date. Replace every 3-5 years. Protecting a $1,500 computer with a $20 device that may no longer work is a poor trade.
9. Domain Names
Typical lifespan: 1-10 years depending on registration term
A lapsed domain does not just stop working — it can be purchased by someone else, including squatters who will charge a premium to sell it back.
- Registrar reminders are unreliable — they often land in spam or go to an old email
- Auto-renewal can fail if the credit card on file has expired
- Grace period: Most registrars offer 30 days, but your site goes down immediately
- After redemption: Recovering the domain costs $80-$200+, then it goes to the open market
- Email stops too — losing your domain means losing email tied to it
Tip: Log into your registrar now and verify your payment method is current and your contact email is one you actually check.
10. Food Handler Permits and Safety Certifications
Typical lifespan: 2-5 years depending on jurisdiction
This applies to restaurant staff, food truck operators, catering businesses, farmers market vendors, home bakery producers, and childcare providers who prepare meals.
- ServSafe certifications expire every 3-5 years depending on level and jurisdiction
- State and county food handler cards typically expire every 2-3 years
- Letting a certification lapse can result in fines, failed inspections, or forced closure
- Alcohol service certifications (TIPS, TABC) also expire, typically every 2 years
Tip: If you manage a team, track every member's certification in a shared system. Employee turnover makes this especially challenging.
How ExpiryKeeper Catches What You Miss
ExpiryKeeper is purpose-built for tracking the expirations that no one else reminds you about. Add any item — from your fire extinguisher to your domain name — with its expiration date, and let the platform handle the reminders. Set custom alert windows, categorize by type, and assign household items to family members so nothing gets overlooked.
The next time you change your smoke detector batteries, check the manufacture date on the back. You might be surprised by how many silent expirations are ticking away around you.