Pet Microchipping Guide 2026: Safety, Cost & How It Works

The microchipping procedure is similar to a routine
vaccination. Most pets experience minimal discomfort – a
quick pinch that lasts less than a second. Many
veterinarians administer the chip during spay/neuter
surgery while the pet is under anesthesia, eliminating any
discomfort. For anxious pets, some vets offer mild
sedatives or topical numbing creams.

No, microchips are not tracking devices.
They contain only a unique identification number that must
be read by a scanner. For real-time location tracking, you
need a separate GPS tracker that attaches to your pet’s
collar. Microchips are permanent identification, while GPS
devices provide live location data but require batteries
and often subscription fees.

Microchips are designed to last at least 25 years, which
is longer than the lifespan of most pets. They have no
battery or moving parts, so there’s nothing to wear out.
The chip remains inert under the skin until activated by a
scanner. In extremely rare cases (less than 0.1%), chips
may fail, which is why annual scanning during veterinary
checkups is recommended.

Modern microchips include an anti-migration coating that
helps them stay in place. Migration is rare (occurring in
approximately 0.009% of cases) and typically harmless.
When migration does occur, the chip usually moves only a
few inches from the original implantation site. Shelters
and veterinarians are trained to scan the entire animal if
a chip isn’t found between the shoulder blades.

It depends on the registry. Some offer lifetime
registration with a one-time fee, while others require
annual renewal (typically $15-$25 per year). Even with
lifetime registration,
you must update your contact information whenever it
changes.
An outdated registration is as useless as no registration
at all. Set calendar reminders to verify your information
annually.

The main types are 125 kHz (older US standard), 134.2 kHz
(ISO international standard), and dual-frequency chips.
For most pets,
ISO 11784/11785 compliant chips (134.2 kHz)
are recommended because they work worldwide and are
readable by most modern scanners. If you plan to travel
internationally with your pet, an ISO chip is often
required.

Microchips can be surgically removed if absolutely
necessary, but the procedure is more invasive than
implantation and requires anesthesia. Removal is rarely
recommended or necessary. In cases of chip failure or
migration causing discomfort, removal might be considered,
but these situations are extremely uncommon. Most
veterinarians will explore other options before
recommending removal.

Microchipping requirements vary by location. In many US
cities and counties, microchipping is required for all
dogs and sometimes cats. Several countries (including the
UK, Australia, and New Zealand) have nationwide
microchipping mandates. Even where not legally required,
many shelters and rescue organizations microchip all
adopted animals before placement. Check your local
regulations or consult with your veterinarian.

An unregistered microchip is completely useless for pet
recovery. When a scanner reads an unregistered chip,
there’s no owner information to retrieve. The shelter or
veterinarian would have no way to contact you. Some chips
come with pre-paid registration, but you still must
complete the registration process with your information.
Registration is the most critical step in the entire
microchipping process.

Microchips are made from biocompatible materials
(typically glass) that are well-tolerated by animal
tissues. Allergic reactions or rejection are extremely
rare, occurring in fewer than 1 in 100,000 cases. The
materials are similar to those used in human medical
implants that remain in the body for decades. If you
notice unusual swelling, redness, or discharge at the
implantation site, consult your veterinarian.