How to Get Dog Urine Out of Carpet (Fresh and Old Stains)

To get dog urine out of carpet, blot it, wash it, rinse it, then remove the smell. Press paper towel into the wet spot until nothing more comes up. Blot in a weak solution of dishwashing liquid and lukewarm water, rinse with plain water, then treat the spot with an enzyme cleaner. Finish by pressing it dry under a layer of paper towel and a flat weight.

Speed matters. The longer urine sits, the deeper it travels and the more likely it is to change the colour of your carpet. The Carpet and Rug Institute, the carpet industry's technical body, is clear that some urine stains cannot be removed at all.

This guide covers why urine is harder to shift than other spills, a step-by-step method for fresh accidents, what to do about old stains, which home remedies are worth using, and how to stop your dog going in the same spot again.

A coffee spill is mostly a colour problem. Dog urine causes three problems at once.

• It changes the colour. The Carpet and Rug Institute's technical bulletin explains that urine can attack carpet dyes. On beige carpet, the blue dye is affected first, which leaves a yellow, orange or red mark. Some reactions show straight away. Others take weeks or months to appear.
• It soaks down. Urine does not sit on top of the pile. It runs down through the fibres into the backing and the underlay. The same bulletin warns that the moisture can weaken the bond between the carpet layers and damage seams.
• It keeps smelling. Products that only cover the smell can let it come back, especially in humid weather. Your dog also has a far better nose than you do. A spot that smells clean to you can still smell like a toilet to them.

That last point is why the final step, removing the smell, matters as much as removing the stain.

Two small habits make a big difference. Use white paper towel only, because coloured or printed towel can transfer dye to damp carpet. And keep the carpet damp, not soaked. Pouring on water or cleaner pushes the urine further down, which is the opposite of what you want.

Old urine is harder, but it is still worth trying before you give up on it.

Find every spot first. Dogs often go more than once in the same area, and dried urine can be hard to see. A small UV torch, sold cheaply at hardware and pet stores, makes many dried urine marks glow in a dark room. Mark each one with a sticky note.

Then follow the same steps as above. Blot the detergent solution in, rinse, then apply the enzyme cleaner and give it the full time on the label. Old spots often need two or three rounds, with the carpet drying fully between each one. Godfrey Hirst notes that stains hidden deep in the pile can resurface as the carpet dries, a process called wicking, and that treatment may need repeating over several days.

Know when to stop. If the mark has turned yellow, orange or red and is not fading after a few rounds, the dye has probably changed. That is colour loss, not dirt, and no cleaner can put the colour back. Scrubbing harder at this point only damages the pile around it.

Whatever you use, use one product at a time and rinse between them. Mixing cleaners on the carpet makes it harder to rinse them out, and some household chemicals should never be combined.

Cleaning properly is part of training. RSPCA Victoria advises cleaning accidents with a commercial enzymatic cleaner, because a puppy that can still smell its waste is likely to treat that spot as a toilet again. RSPCA Pet Insurance adds a warning about ammonia-based cleaners: the smell is similar to urine and can attract a puppy back.

A few other things help:

• Do not punish accidents. RSPCA South Australia warns that punishment can teach a dog that going in front of you is scary, which leads to hidden accidents behind the sofa. Those are the ones you find weeks later.
• Clean up out of sight. Calmly, without making a fuss, and ideally while your dog is in another room.
• Take your dog out more often, especially after sleeping, eating, drinking and playing, and praise them when they go outside.
• Limit access while you are training. Close doors to carpeted rooms, or use a playpen, until accidents stop.
• See your vet if it is sudden. RSPCA Victoria notes that if a dog who was doing well suddenly starts having accidents, there could be a health problem. Older dogs, and dogs drinking more than usual, are worth a check-up too.

Fresh accidents caught early are usually a DIY job. Call a professional carpet cleaner when:

• the smell keeps coming back after you have cleaned the spot properly, especially in warm or humid weather
• there are several spots, or one area your dog has used many times
• the spot is on a wool or expensive carpet and you do not want to risk the colour
• you are moving out of a rental and need the carpet professionally cleaned before your final inspection (see our end of lease cleaning)

Our pet stain and odour carpet cleaning treats urine at the source rather than masking it, and we check each spot before we start. We will tell you honestly if the urine has reached the underlay, because once it has, cleaning the carpet alone will not stop the smell. Stain treatment usually adds $30 to $60 to a carpet steam clean. You can see the full rates on our carpet cleaning prices page.

For general upkeep, Godfrey Hirst recommends a professional hot water extraction every 12 to 18 months. Homes with dogs usually sit at the shorter end of that range. We clean carpet across Canberra and Queanbeyan; see our Canberra carpet cleaning page for what is included. If the accident was on the couch rather than the floor, our upholstery cleaning service can help, and our complete guide to removing carpet stains covers other common marks.