The best pet depends on your living space, time, budget, and what you want from an animal

There is no single "best" pet—the right choice is the one that fits your actual life, not the life you wish you had. A dog demands daily walks and training. A cat uses a litter box and is fine alone for a day. A fish needs a tank you maintain but no emotional labour. A rabbit can live 10 years and needs more space than people expect. Before you bring any animal home, be honest about how much time you have, how much you can spend on food and veterinary care, and whether your landlord or lease allows it.

Pet insurance costs vary by species and age, so comparing plans before you bring an animal home—not after an emergency—helps you understand the full cost of ownership. The right pet is one you can afford to keep healthy for its entire life, including unexpected vet bills.

Key Takeaways

  • Dogs require daily exercise, training, and attention, and cost $1,500 to $3,000 per year in food and routine care, plus emergency vet bills that can reach thousands of dollars.
  • Cats are lower-maintenance than dogs, use a litter box, and tolerate being alone for 24 to 48 hours, making them suited to working households.
  • Small animals like rabbits, guinea pigs, and hamsters need proper housing and daily care but take up less space and cost less than dogs or cats.
  • Fish and reptiles require specific tank conditions and feeding schedules but do not need the hands-on interaction that mammals do.
  • Pet insurance costs vary by species and coverage level, so compare plans before you bring an animal home, not after an emergency.

Dogs: High commitment, high reward

Dogs need daily exercise, training, and social interaction. A puppy requires several months of housebreaking and behavioural work. An adult dog from a shelter may have unknown history and need patience while it adjusts. All dogs need a vet visit once a year for vaccines and a health check, plus dental care, nail trimming, and flea prevention.

The cost of dog ownership includes food (which varies by size and quality), routine vet care, emergency vet care, training classes, boarding or pet-sitting when you travel, and toys. A medium-sized dog costs between $1,500 and $3,000 per year in routine expenses. A serious illness or injury can cost $5,000 to $15,000 or more. Pet insurance for dogs typically costs $30 to $60 per month, depending on the dog's age and the coverage level you choose.

Dogs are a good fit if you have time for daily walks, live in a space where dogs are allowed, and can afford unexpected vet bills. They are a poor fit if you work long hours with no one to let them out, live in a no-pets apartment, or cannot afford emergency care.

Cats: Lower maintenance, independent

Cats use a litter box, so they do not need to go outside. They are comfortable alone for 24 to 48 hours if you leave food, water, and a clean litter box. They groom themselves and do not need baths. They are quieter than dogs and take up less space, making them suited to apartments and busy households.

Cats still need routine vet care—vaccines, dental checkups, and parasite prevention. They need a litter box you clean daily, food, water, toys, and a scratching post. A cat costs roughly $800 to $1,200 per year in food and routine care. Pet insurance for cats typically costs $10 to $25 per month. Emergency vet care for a cat can cost as much as for a dog, so insurance or savings matter.

Cats are a good fit if you work full-time, live in an apartment, or want a pet that is affectionate but independent. They are a poor fit if you have severe allergies, live in a no-pets building, or want an animal that follows you around constantly.

Small mammals: Rabbits, guinea pigs, hamsters, and gerbils

Small mammals need less space than dogs or cats but more care than many people expect. Rabbits live 8 to 12 years and need a large enclosure, daily exercise outside the cage, hay, vegetables, and a vet who knows rabbit medicine—which is not every vet. Guinea pigs are social and do better in pairs. Hamsters and gerbils are nocturnal and active at night. All of them need bedding you change regularly, food, water, and enrichment toys.

A rabbit costs $500 to $1,000 per year. Guinea pigs cost $400 to $800 per year. Hamsters and gerbils cost $200 to $400 per year. Vet care for small mammals is cheaper than for dogs or cats, but finding a vet who treats them can be hard in some areas. Pet insurance for small mammals is rare and usually not worth the cost.

Small mammals are a good fit if you have limited space, want a pet that does not need to go outside, and can commit to daily care for years. They are a poor fit if you want a pet you can hold and cuddle constantly, or if you travel frequently and cannot arrange daily care.

Fish and reptiles: Low interaction, specific needs

Fish and reptiles do not need the hands-on interaction that mammals do. A betta fish in a 5-gallon tank costs little to set up and maintain. A larger aquarium with multiple fish needs a filter, regular water changes, and monitoring of water chemistry. Reptiles like bearded dragons or corn snakes need a heated enclosure, specific lighting, live food or frozen food, and a vet visit once a year.

A fish setup costs $50 to $300 to start, plus $10 to $30 per month to maintain. A reptile setup costs $200 to $1,000 to start, plus $30 to $100 per month to maintain. Vet care for reptiles is specialized and can be expensive if something goes wrong. Pet insurance does not cover fish or reptiles.

Fish and reptiles are a good fit if you want a pet that does not require daily hands-on care, live in a small space, or have allergies to fur. They are a poor fit if you want a pet that responds to you, or if you cannot maintain the specific temperature and humidity conditions they need.

Allergies, housing, and other practical limits

Before you choose a pet, check your lease or homeowner agreement. Many rental properties ban dogs, some ban all pets, and some allow only cats. If you own your home, you have more freedom, but neighbours may have complaints about noise or smell.

If you or someone in your household has allergies, know that no dog or cat is truly hypoallergenic. Some breeds shed less or produce less dander, but all of them produce allergens. Fish and reptiles do not shed fur or dander, so they are better for people with allergies. If you have a severe allergy and want a mammal, talk to an allergist before you bring one home.

Consider also whether you travel, work long hours, or have young children. Dogs need someone to let them out and give them attention. Cats can be alone longer but still need care. Small mammals and fish need daily feeding but less active supervision. Reptiles need feeding and enclosure checks but can go longer between care.

Pet insurance and emergency costs

Pet insurance covers vet bills for accidents, illness, and sometimes routine care, depending on the plan. Costs vary by the animal's species, age, and the coverage level. A young dog's basic plan might cost $30 to $50 per month. A cat's plan might cost $10 to $20 per month. Most plans have a deductible (usually $250 to $1,000 per year) and a copay or coinsurance (usually 10 to 20 percent of the bill).

Pet insurance does not cover pre-existing conditions, and some breeds or species have higher premiums or exclusions. It is cheaper to buy insurance when the animal is young and healthy. If you wait until after an illness or injury, that condition will not be covered. Compare plans from different insurers before you bring a pet home, because the cost and coverage vary widely.

Frequently Asked Questions

What is the cheapest pet to own?

Fish are the cheapest to set up and maintain. A betta fish in a small tank costs $50 to $100 to start and $10 to $20 per month. Hamsters and gerbils are also inexpensive—$200 to $400 per year total. Dogs and cats cost more in food, vet care, and emergency expenses.

Can I get a pet if I work full-time?

Cats are the best choice for a full-time worker because they use a litter box and tolerate being alone for 24 to 48 hours. Dogs need someone to let them out and give them attention during the day—a dog walker, pet sitter, or doggy daycare. Fish and small mammals can be left alone with food and water for a day or two.

How much does pet insurance cost?

Pet insurance for dogs typically costs $30 to $60 per month. Cats cost $10 to $25 per month. Costs vary by the animal's age, breed, and the coverage level you choose. Most plans have a deductible and coinsurance, so you still pay part of each vet bill. Fish and reptiles are rarely covered by insurance.

What pet is best for an apartment?

Cats are ideal for apartments because they do not need to go outside and are quiet. Small mammals like rabbits or guinea pigs also work well in limited space. Dogs can live in apartments if they get enough exercise, but large dogs and breeds that bark a lot may bother neighbours. Always check your lease first—many apartments ban dogs or all pets.

Should I get pet insurance before or after I bring a pet home?

Buy insurance before you bring the pet home, or as soon as possible after. Insurance does not cover pre-existing conditions, so any illness or injury that happens before you buy a policy will not be covered. Premiums are also lower when the animal is young and healthy.