New Cat Owner Guide UK: The First Three Months
Before your cat arrives, set up one quiet room with a bed, food, water, a litter tray and a scratching post, and keep the cat in that room while it settles. Arrange insurance from the day the cat arrives, register with a vet in the first week, check the microchip is registered to you (the law in England), and wait three to four weeks before letting the cat outside.
Last updated 28 September 2026. Legal points checked 28 September 2026 against GOV.UK (microchipping in England, the Renters' Rights Act) and settling-in advice against Cats Protection's guidance on bringing a cat home.
In short
- Start the cat in one room, not the whole house.
- Let it hide. Hiding is normal while a cat settles, and Cats Protection's guide is whether it is eating, drinking and using the tray. If it stops doing any of those, or seems in pain, call your vet.
- In England your cat must be microchipped by 20 weeks old, with your details kept up to date.
- Insure on day one, because illness in the first couple of weeks of a policy is usually not covered.
- Keep an adult cat in for three to four weeks, and until it is neutered, vaccinated and microchipped, before it goes outside. A kitten also has to wait until its vaccinations have taken effect; the vaccination guide explains the timing.
What are the new cat ownership laws in the UK?
The main change is microchipping. Since 10 June 2024, every cat in England must be microchipped before it reaches 20 weeks old, and the owner's contact details must be kept up to date on an approved microchip database. An owner who does not comply can be fined up to £500. If you move house or change phone number, update the database, because a chip with old details will not get a lost cat home.
In England and Wales, the Animal Welfare Act 2006 also makes you legally responsible for your cat's welfare needs, and Scotland and Northern Ireland have their own equivalent laws. Cats Protection sums them up as the right environment, a healthy balanced diet, the chance to express natural behaviour, suitable company (with or away from other animals) and protection from pain and illness.
If you rent in England, the Renters' Rights Act lets you ask your landlord for permission to keep a pet. GOV.UK's guidance says the landlord must consider the request and should give a reason if they refuse. Ask in writing, and ask before the cat arrives.
What do I need for a new cat?
Cats Protection's list for the cat's first room is a comfy bed, food and water bowls, cat food, a litter tray and litter, a scratching post, a carrier and some toys. Buy the same food and litter the cat has been using at the rescue or breeder, so the move is the only big change that week. Our new cat checklist prices each item, and the cat-proofing guide covers what to move or lock away before the cat comes home.
A few days before collection, leave a blanket or an old T-shirt with the cat so your home's smell is familiar when it arrives. Cats Protection suggests this, and it costs nothing.
What should I do when I bring a new cat home?
Take the carrier straight to the cat's room, open the door and leave the cat to come out when it is ready. Cats Protection suggests giving the cat an hour or so to explore the room before you and your family introduce yourselves, one person at a time. Do not tip the cat out of the carrier or pull it out from under the bed.
For the first few days, the room is the cat's whole world. Sit in there quietly, read or scroll your phone, and let the cat approach you. Children find this the hardest part, so give them a job, such as putting the food down, rather than asking them to leave the cat alone.
If you have other pets, keep them apart at first. Cats Protection's method is to swap scents on a cloth before the animals meet, and to use a glass or mesh door between cats for the first sightings. Keep a dog on a lead for its first meetings with the cat.
Should I let my new cat hide?
Yes. Hiding is how a cat copes with a new place, and dragging it out makes the next hiding session longer. Cats Protection's advice is that as long as the cat is eating, drinking and using its litter tray, there is no need to worry. Give it hiding places you can live with, such as a cardboard box on its side or a covered bed, so it is not wedged behind the washing machine.
See your vet if the cat stops eating, or stays stressed for a long time with no sign of improvement. Rescue cats that have been through several homes can take longer to settle; our guide to helping a rescue cat settle in covers that in more detail.
Should I let my new cat explore the house?
Yes, once it is relaxed in its first room. Signs to look for are a cat that eats in front of you, uses the tray normally, sleeps in the open and comes to you for attention. Then open the door and let it explore at its own pace, while leaving its tray, food and bed where they are, so it has a safe base to retreat to.
Going outside comes later. Cats Protection advises keeping a new cat in for three to four weeks and making sure it is neutered, up to date with its vaccinations and microchipped first. Whether your cat goes out at all is your call; our indoor vs outdoor guide sets out the trade-offs.
Should a first-time cat owner get a kitten or an adult?
An adult cat is often the easier first cat. You can see its personality before you commit, it is usually litter trained, and a rescue adult normally comes neutered, vaccinated and microchipped. A kitten needs more of your time for play, training and vet visits in its first year, and its adult personality is still a guess. Our rescue cat vs kitten guide compares the two, and choosing the right cat covers pedigree or moggy.
What mistakes do first-time cat owners make?
A big one is giving the cat the run of the house on day one, which can overwhelm it; start with one quiet room instead. Close behind are too much handling, especially by children, and changing everything at once: new home, new food, new litter and a new dog in the same week. Change one thing at a time.
Other mistakes are easier to fix. Switch food gradually over about a week rather than overnight. Play with your cat every day with a wand toy rather than leaving toys on the floor. And sort the paperwork early: register with a vet in the first week, and have insurance in place from the day the cat arrives. Our cat insurance guide explains why the start date matters, and the vaccination schedule shows which jabs to book.
A routine that works after the first month
Every day, scoop the litter tray, refresh the water, feed at regular times and play for a few minutes at a time. Every week, wash the tray out completely, brush the cat (daily for long-haired breeds) and look at its eyes, ears and teeth. Every month, keep flea and worm treatment on the schedule your vet recommends and weigh the cat, so you notice a slow gain or loss. Every year, book the health check and booster, and review your insurance at renewal rather than letting it roll over unread.
Budget for it too. Our cat cost guide puts the minimum at £79 a month, based on PDSA's figures, before any vet bills for illness.
Sources
- GOV.UK: cat microchipping now mandatory (10 June 2024; 20 weeks; fine up to £500; details kept up to date)
- GOV.UK: Renters' Rights Act overview for tenants (asking to keep a pet, England)
- Cats Protection: bringing a cat home (first room, hiding, introductions, three to four weeks before going outside)
- Cats Protection: your responsibilities (welfare needs under the Animal Welfare Act 2006)