Dogs cost twice as much as cats in the first year, according to a new study which suggests owners typically spend more than £4,700 ($8,380).
Food, bedding, toys, equipment and insurance set dog owners back £4,791 on average - including buying the animal in the first place.
The research revealed new cat owners in comparison will spend around £2,455 in the first 12 months - much more than cheaper alternatives like rabbits (£1,802) and fish (£769).
Horses cost the most, the study by Nationwide Home Insurance, found, forcing owners to shell out a staggering £12,654. The average spent in the first 12 months of owning a pet was £3,500.
Rob Angus, Nationwide's head of general insurance, said: "Owning an animal can be extremely rewarding, but a very expensive experience.