The cheapest part of a dog is the dog

I'll be honest: I built the True Cost Calculator to settle an argument about cars. Then I typed in a dog, and the numbers ended the discussion differently than I expected.

Here's the short version: a medium-sized dog costs about 18,600 euros over 12 years, and the dog itself is less than 5% of that. The price you pay the breeder or the shelter is basically the entrance ticket. The real cost is a subscription that runs for a decade.

The numbers (no guessing, just arithmetic)

I used the dog example that ships with the calculator. It's deliberately ordinary, not a show dog or a dog with a chronic illness:

• 900 € to buy or adopt
• 12 years together
• 0.35 kg of food per day at 6 € per kg
• 250 € a year for the vet (vaccinations, a check-up, the occasional "he ate what?")
• 240 € a year for insurance
• 100 € dog tax per year, plus 10 € a month for toys and treats

The calculator adds it all up:

That's 1,551 € a year, 129 € a month, or 4.25 € a day. That's roughly one fancy coffee, every single day, for twelve years. Your dog doesn't care about coffee. Your dog cares about food, which, at almost half the total, is by far the biggest line.

The sticker-price multiplier is the funny part

The calculator shows a number I like a lot: how many times the sticker price you really pay.

For the compact car example (bought for 24,000 €, financed, kept for six years) it's 1.48×. The car is expensive at the start, but the purchase dominates.

For the dog it's 20.7×.

So the "cheap" purchase is the one that costs you twenty times its price, and the "expensive" one costs you one and a half times. That's not because dogs are a bad deal. It's because almost everything about a dog is recurring, and recurring costs quietly multiply by the number of years. Twelve years is a long time for a small monthly number to grow up.

How to get an honest number for your own dog (or cat, or rabbit)

The calculator was originally built around cars and appliances, so here is how the fields map to a pet. We recently renamed them to make this more obvious:

1. What is it? → choose Pet. The results then say "Pet food" and "Vet & health care" instead of fuel and repairs.
2. Purchase price → the breeder price or the shelter's adoption fee. Leave resale value at 0; nobody resells a dog.
3. Years you will own it → be realistic, not hopeful. For many medium-sized dogs 10–13 years is a fair planning number; small breeds often live longer, giant breeds shorter.
4. Food goes into the consumption fields, which is less obvious than it should be:
5. Energy, fuel or food consumption: kg of food per day (e.g. 0.35)
6. Consumption is per: 1 usage unit
7. Price per unit: price per kg of food
8. Usage per year: 365 feeding days
9. Maintenance, repairs or vet care → your yearly vet budget. If you don't know it, ask your vet what a normal year costs for your breed and add a cushion.
10. Other recurring costs → dog tax, liability insurance if separate, grooming, a dog walker, treats, the new bed you will definitely buy after the old one was "redecorated".

Three things I didn't expect

Food beats everything. I assumed the vet would be the big one. It isn't, at least not for a healthy dog. The daily bowl is half the lifetime cost, which means the cheapest lever is choosing food you can afford for twelve years, not one you can afford this month.

Small monthly costs are the sneaky ones. 10 € a month for toys and treats feels like nothing. Over 12 years it's 1,440 €, more than the dog cost. The table at the bottom of the result lists every recurring item with its 12-year total, and that column is where the surprises live.

The per-day number makes decisions easier. "1,550 € a year" sounds scary. "4.25 € a day" sounds manageable. Both are true. I find the daily number useful for the should we conversation and the yearly one for actually budgeting.

A few honest limitations

The calculator does plain arithmetic, on purpose:

• No inflation. Prices stay constant over the years, so treat the result as "in today's money".
• No emergencies. A single surgery can cost more than several normal vet years. If you don't have pet insurance with good coverage, consider adding an emergency buffer as a recurring yearly amount.
• Your time isn't in there. Walks, training, the 6 a.m. "I need to go out" stare. Priceless, but also not free.

None of this is meant to talk anyone out of a dog. Mine was the best money I ever spent, and the calculator agrees that it was a lot of money. It's just nicer to know the real number before the puppy eyes do the negotiating.

Try it with your own numbers

Open the True Cost Calculator, click "Medium-sized dog, 12 years" under Try an example, and change the numbers to match your plans. It also works for cats, horses (brace yourself), a new car, a heat pump, or that espresso machine you've been eyeing. The machine also turns out to be mostly a coffee-bean subscription.