Every assumption and source
The bill is a starting point for adult pets at a steady weight. Calories come from the Merck Veterinary Manual formula, which can miss by 30% or more for one animal. It leaves out vet treatment for illness, puppies and kittens, and pregnancy: ask your vet about those. Anything marked Assumption is our choice, not a published figure. You can overwrite any amount on the bill.
| Figure | Used | Where it comes from |
|---|---|---|
| Cross-check, cat | £1,500, not added | To compare: Battersea says about £1,500 a year, page updated 6 July 2026. PDSA's minimum, calculated 2024, is £79 a month, with food and insurance included. PDSA: the cost of owning a cat |
| Cross-check, dog | £1,800, not added | To compare: Battersea says about £1,800 to £2,000 a year, page updated 13 October 2026. PDSA's minimum, calculated 2024, is £69 to £116 a month, with food and insurance included. PDSA: the cost of owning a dog |
| Dry cat food, caloriesAssumption | 3,500 kcal/kg | Dry cat food: 3,500 kcal/kg, an assumption. Few makers publish this, so check your bag. Royal Canin Academy: dry food runs 2,800 to 4,800 kcal/kg |
| Dry cat food, priceAssumption | £6.00/kg | Price: £6.00/kg, the median of the first 48 dry cat foods on zooplus.co.uk, read 2 November 2026 from Portugal. Page order, not a market average. zooplus.co.uk listing |
| Dry dog food, caloriesAssumption | 3,500 kcal/kg | Dry food: 3,500 kcal/kg, an assumption from four published labels, 3,500 to 4,050 kcal/kg. Royal Canin Academy: dry food runs 2,800 to 4,800 kcal/kg |
| Dry dog food, priceAssumption | £4.47/kg | Price: £4.47/kg, the median of the first 48 dry dog foods on zooplus.co.uk, read 2 November 2026 from Portugal. Page order, not a market average. zooplus.co.uk listing |
| First-year kit, cat | £366 | PDSA, calculated 2024: about £366, excluding the cat itself. Battersea's one-off list adds up to £232.50. PDSA: the cost of owning a cat |
| First-year kit, large dog | £560 | PDSA, calculated 2024: £560 for a large dog, excluding the dog itself and the microchip. PDSA: the cost of owning a dog |
| First-year kit, medium dog | £531 | PDSA, calculated 2024: £531 for a medium dog, excluding the dog itself and the microchip. PDSA: the cost of owning a dog |
| First-year kit, small dog | £415 | PDSA, calculated 2024: £415 for a small dog, excluding the dog itself and the microchip. PDSA: the cost of owning a dog |
| Insurance benchmark, cat | £9.08/month, not added | Blank on the bill. For scale: Which? reported £9.08 a month from Go Compare quotes, January to May 2025. Battersea says £24. Quotes vary by breed and postcode. Which?, 29 July 2025 |
| Insurance benchmark, dog | £11.68/month, not added | Blank on the bill. For scale: Which? reported £11.68 a month from Go Compare quotes, January to May 2025. Battersea says £20 to £60. Quotes vary by breed and postcode. Which?, 29 July 2025 |
| LitterAssumption | £300 | Battersea: £20 to £30 a month, page updated 6 July 2026. We use £25. Battersea: the cost of owning a cat |
| Pet sitting, cat | £140 | Battersea: £140 a year, page updated 6 July 2026. Off by default. Battersea: the cost of owning a cat |
| Pet sitting, dogAssumption | £795 | Battersea: £390 to £1,200 a year, page updated 13 October 2026, table costed 'at the time of writing'. We use the middle. Off by default. Battersea: the cost of owning a dog |
| Poo bags | £42 | Battersea: £3.50 a month, £42 a year, page updated 13 October 2026, table costed 'at the time of writing'. Battersea: the cost of owning a dog |
| Professional groomingAssumption | £420 | Battersea: £240 to £600 a year, page updated 13 October 2026, table costed 'at the time of writing'. We use the middle. Off by default, since short coats may not need it. Battersea: the cost of owning a dog |
| Routine health, cat | £180 | Battersea: £10 a month plus a £60 yearly vet check, page updated 6 July 2026. Fleas, worming, vaccinations. Battersea: the cost of owning a cat |
| Routine health, dog | £312 | Battersea: £26 a month, £312 a year, page updated 13 October 2026, table costed 'at the time of writing'. Fleas, worming, vaccinations and a yearly check. Battersea: the cost of owning a dog |
| Treats, dogAssumption | £240 | Battersea: £120 to £360 a year, page updated 13 October 2026, table costed 'at the time of writing'. We use the middle. Battersea: the cost of owning a dog |
| Wet food, caloriesAssumption | 1,000 kcal/kg | Wet food: 1,000 kcal/kg, an assumption, the middle of the 700 to 1,300 range. Royal Canin Academy |