Kitten supply costs in the first year: a realistic checklist
A kitten's first year is one of the cheaper pet years there is, provided two lines are budgeted honestly: food during growth, and litter, which starts immediately and never stops. Vet care is a real first-year cost but a service, so it sits outside this supply checklist.
One-off setup
A litter box (low-sided for a small kitten, full size within months), a carrier, which is a safety item rather than an accessory, food and water bowls, a scratching post bought before the furniture teaches the lesson instead, bedding, and a starter set of toys. Kitten furniture and posts are tracked under cat furniture; a sturdy simple post beats a novelty one a kitten outgrows by month six.
The repeating lines
Kitten food is formulated for growth and fed in increasing amounts until roughly the first birthday, when most cats move to adult food; the wet-versus-dry decision is costed in wet food vs dry food for cats, and it matters more in year one than any other year because a kitten eats a lot for its size. Litter runs at the same 15 to 20 lb per month planning figure as an adult cat, often at the high end while litter training is new; cost it per pound with cat litter cost per pound. Treats, replacement scratchers, and the occasional toy make up the rest.
Where new owners overspend
Tiny kitten-sized versions of everything: dishes, beds, and boxes that are outgrown in a single season. Buy adult sizes from the start wherever safety allows; a kitten grows into a big box in weeks, and the savings fund the food bill. The opposite error is one giant bag of kitten food bought before knowing the kitten will eat it.
The year in one line
Budget food monthly, litter monthly, prevention as advised by your vet, and everything else as a modest one-off, then let price alerts catch the lows on the two repeating lines that never go away.