Why does my cat scratch the sofa, and how do I stop it?
Cats scratch the sofa because it is tall, stable, and has the right texture to sink their claws into. Scratching is not damage-seeking behaviour. It is stretching, scent-marking, and claw maintenance, all at once. Your cat is not attacking the sofa. It is using the only object in the room that does the job properly.
Stop it by giving them something that does the job better, in the same place.
The short answer
- Cats scratch to stretch their spine and shoulders, not just to sharpen claws
- They scratch vertically, reaching up at full stretch, which is why floor-level scratchers get ignored
- They scratch where they already spend time, so a post in the spare room will never be used
- Sofa arms win because they are tall, stable, and grippy. Beat those three things and you win
- Punishment does not work and makes anxious scratching worse
Why cats scratch furniture
Scratching does four jobs at once, and only one of them involves claws.
It stretches the body. A cat reaching up to scratch is extending its spine, shoulders and forelimbs in one movement. This is why cats scratch immediately after waking. It is a stretch, and the surface is incidental.
It marks territory. Cats have scent glands in their paw pads. Scratching leaves both a visual mark and a chemical one. This is why cats scratch the arm of the sofa nearest the door, and why they scratch more in multi-cat homes.
It maintains claws. Scratching pulls off the dead outer sheath of the claw. It does not sharpen them in the way a knife is sharpened.
It relieves stress. Scratching increases when a cat is anxious, bored, or newly moved. If scratching has suddenly got worse, something in the environment has changed.
Do cats scratch vertically or horizontally?
Most cats prefer to scratch vertically, reaching up against a surface at close to full body length. An average adult cat stretches around 60cm from paw to shoulder when scratching, which is taller than most scratching posts sold in supermarkets.
This is the single most common reason a scratching post gets ignored. It is too short to be worth using. A cat that cannot get a proper stretch out of the post will go back to the sofa arm, which is taller.
A minority of cats prefer horizontal scratching, usually on carpet or a flat cardboard pad. If your cat scratches the rug rather than the furniture, buy horizontal. If your cat scratches the sofa arm, the chair back, or the door frame, buy vertical, and buy it tall.
Why your scratching post isn't working
1. It's too short. If your cat cannot stretch to full length, the post fails its primary purpose. Measure your cat from front paw to shoulder while it scratches the sofa. That is your minimum height.
2. It's in the wrong room. Cats scratch where they already live: near the sofa, near the bed, near the door they come through. A post in the hallway is furniture, not a scratcher.
3. It wobbles. A cat putting its full weight into a stretch will not use something that moves. Stability matters more than size.
4. The texture is wrong. Most cats prefer sisal rope or corrugated card. Carpet-wrapped posts confuse the issue, because they teach the cat that carpet is scratchable.
What actually works
- Measure your cat. Watch it scratch the sofa. Note the height its front paws reach. That is the minimum height of anything you buy.
- Put the new scratcher directly in front of the damaged spot. Not nearby. In front of it, touching it. You are not relocating the behaviour, you are substituting the object.
- Make the sofa worse, temporarily. Double-sided tape on the arm, or a sheet of tin foil. Cats dislike both textures. This is not punishment, it is making the alternative more attractive.
- Rub catnip on the new scratcher. First use is the hardest. Once they have scratched it once, they have scent-marked it, and it belongs to them.
- Reward the first use immediately. A treat within three seconds. Not a minute later.
- Move it gradually, if you must. A few centimetres a day, once the cat is using it reliably. Most people never need to.
- Give it two weeks. Substitution is not instant. Removing the tape too early undoes the work.
What doesn't work
This section matters more than the one above, because most advice online repeats things that fail.
Spray bottles and shouting. Punishment does not stop scratching. It teaches a cat to scratch when you are not in the room, and it increases the anxiety that drives stress-scratching in the first place. You end up with the same damage and a cat that avoids you.
Putting the post in a corner “out of the way”. The whole point is that scratching is territorial and social. Cats scratch in the middle of things, not in cupboards.
Buying a taller post but keeping it wobbly. Height without stability is worse than neither. The cat tries once, it rocks, they never return.
Declawing. Illegal in the UK, and rightly. It is amputation of the last bone of each toe.
Nail caps. They fall off, they can be swallowed, and they do nothing about the underlying need to stretch and mark.
Assuming one scratcher is enough. In a multi-cat home, you need one per cat plus one. Scratching is territorial. Sharing is the problem, not the solution.
What about flats and small spaces?
This is where most advice falls apart, because a 60cm floor-standing post takes floor space that a one-bedroom flat does not have.
Wall-mounted scratchers solve it. They mount at whatever height suits your cat, they use zero floor area, and because they are fixed to a wall they are more stable than any freestanding post. Mount one on the wall directly beside the sofa arm your cat has chosen, at the height they reach.
Our Wall Stretch Expandable Cat Scratcher is £14.99, mounts with two screws, and expands to the length you want. It is the product we recommend most often for flats.
Common questions
Will my cat ever stop scratching?
No, and you should not want it to. Scratching is healthy and necessary. The aim is to redirect it, not eliminate it.
How tall should a scratching post be?
Tall enough for your cat to stretch to full length, which is around 60cm for an average adult cat. Measure yours while it scratches the sofa and use that as your minimum.
Why has my cat suddenly started scratching more?
Sudden increases usually mean stress or a change in the environment: a new pet, a house move, new furniture, a change in your routine. Look at what changed in the last fortnight.
Does catnip help?
Yes, for introducing a new scratcher. Not every cat responds to catnip, so if yours ignores it, try silvervine or a treat reward instead.
Do scratching posts work for kittens?
Better than for adults. A kitten given the right surface from week one rarely learns to use furniture. Start early and you never have this problem.
Is my cat scratching out of spite?
No. Cats do not scratch to punish you. If the scratching feels targeted at something you care about, it is because that object is in a socially important part of the room, or it smells strongly of you.
The one thing to take away
Your sofa was never the problem. It was the only thing in the room tall enough, stable enough and grippy enough to do a job your cat needs to do every day. Give them something better in the same spot, and the sofa stops being interesting within a fortnight.
Last updated 14 July 2026. We refresh this guide quarterly.