Most infant car seats are good for 6 to 7 years from the date of manufacture, depending on the brand. The broader category of car seats ranges from 7 to 10 years, but rear-facing infant seats specifically tend to fall on the shorter end of that spectrum. Britax and Chicco infant seats expire after 6 years, while Graco gives most of its infant seats a 7-year lifespan.
Why Infant Seats Have Expiration Dates
Car seats are mostly made of molded plastic, and plastic doesn’t last forever. The shell of your infant seat spends years baking in a hot car, absorbing UV light through windows, and enduring temperature swings from freezing winters to summer heat. Over time, these conditions break down the chemical bonds in the plastic, causing it to become brittle, chalky, and weaker. UV radiation is especially damaging: when the energy from sunlight exceeds the strength of the bonds holding the plastic together, those bonds literally snap. Manufacturers add stabilizers and antioxidants to slow this process, but those protective additives eventually get used up.
Heat compounds the problem. A car parked in direct sun can reach interior temperatures well above 150°F, and repeated exposure at those levels accelerates the breakdown. Moisture also plays a role, gradually attacking certain types of plastic from within. None of this damage is necessarily visible. A seat can look perfectly fine on the outside while its structural integrity has quietly deteriorated. That’s why manufacturers set firm expiration windows rather than leaving it to visual inspection.
How to Find Your Seat’s Expiration Date
Every car seat is required to display its manufacture date and model number on a label. For infant seats, this sticker is usually on the side of the plastic shell or on the bottom. The expiration date itself is typically molded or printed directly into the plastic on the bottom of the seat, not on a removable sticker. If you can’t find it, the manufacture date plus the brand’s stated lifespan gives you the same answer. A Chicco seat made in March 2020, for example, expires in March 2026.
One important detail: the clock starts at the date of manufacture, not the date you bought it. A seat that sat on a store shelf for a year before you purchased it has already used up part of its lifespan.
Expiration by Brand
- Britax: 6 years from manufacture for rear-facing infant seats
- Chicco: 6 years from date of manufacture or date of purchase (whichever is printed)
- Graco: 7 years for rear-facing infant seats manufactured after mid-2011
Other manufacturers fall somewhere in the 6 to 10 year range, but most infant-specific seats cluster around 6 to 7 years. Convertible seats and boosters sometimes last longer because they’re built for extended use across multiple stages.
Your Baby May Outgrow the Seat First
In practice, most children outgrow their infant car seat long before it expires. Infant seats are rear-facing only and designed for the smallest passengers. Every seat has a maximum height and weight limit set by the manufacturer, and once your child hits either one, it’s time to move up to a convertible seat, regardless of the expiration date. Many infant seats max out around 30 to 35 pounds or 32 inches tall, which most children reach somewhere between 12 and 24 months.
This means expiration dates matter most when you’re planning to reuse a seat for a younger sibling or considering a secondhand seat. A seat bought for a first child born in 2020 could still be within its lifespan for a second child born in 2024, but you’ll want to check the math carefully.
Safety Standards Keep Improving
Even if a seat hasn’t technically expired, newer models may offer meaningfully better protection. A major example: NHTSA finalized a rule creating the first-ever side impact testing standard for child restraints. The new standard, FMVSS 213a, requires seats designed for children up to 40 pounds to protect against head and chest injury in a simulated vehicle-to-vehicle side crash. Before this rule, no side impact test existed for car seats, even though child restraints were already estimated to be 42 percent effective at preventing death in side crashes for children up to age 3.
NHTSA’s testing revealed that not all side padding and “wing” structures on older seats actually performed well. In some cases, more padding wasn’t necessarily better. The new standard forces manufacturers to engineer side protection that meets a measurable performance threshold. Seats built to the updated standard will be more protective than older models that were never tested this way. This is one practical reason the expiration window exists: it pushes older designs out of circulation as safety engineering advances.
What Happens After a Crash
A car seat involved in a moderate or severe crash should be replaced immediately, even if it looks undamaged. The forces in a collision can create invisible stress fractures in the plastic shell and compromise the harness system. NHTSA does allow continued use after a minor crash, but only if all five of these conditions are met: the vehicle was drivable after the crash, the area around the car seat was undamaged, no children in car seats were injured, airbags did not deploy, and there is no visible damage to the seat itself. If any one of those conditions isn’t met, replace the seat.
Using a Secondhand Infant Seat
Reusing a car seat from a friend or family member can be safe, but only with some verification. NHTSA recommends checking that the seat has never been in a moderate or severe crash, still has its manufacture date and model number labels, has no outstanding recalls, includes all original parts, and comes with its instruction manual. Missing parts can sometimes be ordered from the manufacturer, and recalled seats may have an available fix, so neither issue is automatically a dealbreaker.
The bigger risk with secondhand seats is unknown history. If you can’t confirm whether the seat was in a crash or how it was stored, you’re gambling on its structural integrity. Seats left in a garage or attic for years between children experience the same heat and UV degradation they would in a car. A secondhand seat from a trusted source with a known history and a valid expiration date is reasonable. One from a yard sale or online marketplace with no background information is not worth the risk.
How to Dispose of an Expired Seat
When your seat expires, the best option is a retailer trade-in event. Target runs a car seat trade-in program (typically in the spring, with a recent event running April 19 through May 2) where you bring in any old seat and receive a discount coupon toward new baby gear. The seats are recycled rather than sent to a landfill.
If no trade-in event is available, cut the harness straps and remove the padding before throwing the seat away. This prevents someone from pulling an expired seat out of the trash and using it. Write “EXPIRED” or “DO NOT USE” on the shell with a permanent marker for extra clarity.