Location is one of the biggest factors in determining pet sitting rates, since it influences how much it costs for a pet sitter to run the business. The amount and types of pets are also significant factors in determining rates.
Dogs tend to cost more than cats, since they usually need more care and visits can take longer. Most pet sitters have a base rate for one pet, so each additional pet takes extra work and costs more money. If the pet sitter needs to return to the home during the day, such as to frequently let out a small puppy, those additional visits cost more as well.
Pet sitters also generally charge more for animals with special needs. Pets that need medication, grooming or other unusual care are more expensive. Animals such as livestock may also cost more.
The type of agency also determines the rates. Many pet sitters work alone, which has less overhead, so it is usually less expensive. However, they also do not necessarily have others available if they get sick or injured. Larger agencies cost more, but they have plenty of staff to fill in during emergencies. They sometimes also have better insurance if something goes wrong and may have other safety protocols in place, such as doing background checks on employees.