If you live in Cherokee County, the animal shelter offers free microchipping for residents. Click here to learn more. If you live outside of this county, you can check what resources your county offers by calling the Cherokee County Humane Society, or most vets will implant a microchip for $15-$20 at the time of spaying/neutering.
It is necessary to establish care with a local veterinarian to establish care and get heartworm prevention medication prescribed, but you can choose to choose a more affordable vet who doesn't charge exam fees for vaccination visits and ala carte services at places like Pet Shots Express.
Affordable Spay/Neuter Programs in Georgia:
SpayGeorgia is an organization that provides low-cost spay/neuter certificates. You can reach them via email at email@example.com for details. Once you have the voucher you can schedule with a vet near you who accepts these vouchers. Anesthesia and pain medication is not included in the price. Most vets also offer affordable vaccinations and microchipping at the time of spay/neuter procedure.