How often should you deep clean a carpet?

Before you start

This guide is about how often a fitted carpet in a home needs a whole-carpet deep clean. It isn't a stain-removal guide or a machine comparison — those are linked where they're relevant. Rugs, especially handmade, antique or natural-fibre ones, follow their own maker's care guidance.

It helps to know:

• Who made your carpet and which range it is — often on the receipt, invoice or guarantee paperwork
• The current care and guarantee terms for that carpet, and whether you registered the guarantee
• What the carpet is made of, if you know — especially whether it's wool or a wool blend
• Which rooms get the most foot traffic, and where the carpet looks most soiled
• When it was last deep cleaned, how, and whether you kept the receipt

We read the current published care and guarantee information from Cormar, Abingdon, Brintons and Victoria in September 2026, alongside guidance from the National Carpet Cleaners Association (NCCA), the US Carpet and Rug Institute (CRI) and the WoolSafe Organisation. The NCCA and CRI are industry bodies with an interest in carpet cleaning, and WoolSafe approves cleaning products and cleaning companies, so we say whose view each figure is. We haven't used cleaning companies' own websites as evidence.

We don't claim to test what we haven't tested: we haven't cleaned carpets on any schedule to compare results. See how we assess guidance.

Vacuuming, spot cleaning and deep cleaning are different jobs

Routine vacuuming removes loose dirt and grit before it works down into the pile. The WoolSafe Organisation's maintenance guidance treats that loose soil as something removed mainly by vacuuming. Makers put it first: Cormar recommends vacuuming at least two to three times a week, Victoria says heavy-traffic areas should be vacuumed daily, and Brintons calls vacuuming the most important thing you can do to keep your carpet clean.

Spot and stain treatment is for a specific spill or mark, and it shouldn't wait for a scheduled clean. Cormar, for example, says spillages should be tackled immediately.

A whole-carpet deep clean deals with the finer, stickier soil that builds up in the pile and, as WoolSafe puts it, makes a carpet "look dirty". WoolSafe describes this as soil removed mainly by wet or low-moisture cleaning rather than by vacuuming. It's an occasional job, done by a professional or with a carpet-cleaning machine. The US Carpet and Rug Institute says quick clean-ups with small hand machines don't take the place of periodic deep cleaning.

WoolSafe treats these as different tasks for different kinds of soil, so frequent vacuuming doesn't remove everything a deep clean is for, and a deep clean isn't a substitute for regular vacuuming.

For a mark that's already set in, our guide on how to remove old stains from carpet covers that separately.

Check your carpet's guarantee first

Some UK carpet makers set their own cleaning condition in their guarantee terms; others don't. Here's what the four we checked in September 2026 say:

• Cormar: Its care and warranty guide says the carpet should be professionally cleaned at least once every two years, and that you should keep receipts and invoices to validate any claim. Its 2022 care and warranty leaflet repeats this in its terms and conditions, which also ask you to keep any cleaning receipts to ensure the warranty is valid. It also recommends vacuuming at least two to three times a week.
• Abingdon: Its Stainfree for Life stain guarantee, for its Stainfree and Lovestory ranges, lists having the carpet professionally cleaned once every two years among the “few simple things” it asks of you. We haven't checked whether its separate wear warranties say the same.
• Brintons: We found no fixed interval. Its care guidance says professional overall cleaning is “sometimes beneficial”, and its FAQ says that for its two-year guarantee, all it asks is that you keep proof of purchase.
• Victoria: We found no fixed interval. Its cleaning guide says a carpet will benefit from a thorough deep clean “from time to time”, and recommends daily vacuuming in heavy-traffic areas.

So whether your guarantee expects a professional clean depends on who made your carpet and which range it is. We couldn't find a single rule that applies across UK carpet makers. Terms change, so check the current terms for your own carpet rather than relying on anyone's summary, including this one.

Where does the “12 to 18 months” advice come from?

The figure you'll see most often is a deep clean every 12 to 18 months. It comes from trade bodies, not from a UK rule.

The US Carpet and Rug Institute recommends having carpet professionally deep cleaned every 12 to 18 months. That's American industry guidance, not a condition set by UK carpet makers.

In the UK, the NCCA — which represents professional carpet cleaners — gives 12 to 18 months as a general rule and 6 to 12 months for pet owners, with shorter intervals in some other circumstances. Its page doesn't cite research for these figures, and it points readers to its own member directory, so we treat them as a trade body's recommendations rather than requirements.

WoolSafe's guidance on wool carpets takes a different approach. In a table written for planned maintenance in managed buildings — not for homes — it ties how often deep (“restorative”) cleaning is needed to how heavily the carpet is soiled, ranging from 18 to 24 months for light soiling, through 12 to 18 months for medium, to 3 to 6 months for very heavy soiling. We don't present those figures as household rules, but its principle, cleaning in proportion to soiling, is the most useful one we found.

So the 12 to 18 months you'll often see is general guidance from the NCCA and, in the US, the CRI. It isn't a UK requirement, and it isn't the right answer for every room.

What makes a carpet need deep cleaning more often?

• Traffic and soiling: WoolSafe's guidance says cleaning should be proportional to the amount of soiling and carried out as and when needed, with busier areas needing more frequent attention.
• Your carpet's guarantee: Where the maker's guarantee sets a professional-cleaning interval, that's what the guarantee asks of that carpet, whatever general advice says.
• How the carpet actually looks: Victoria describes a deep clean as something a carpet benefits from “from time to time”. Visible soiling is another reason to reassess whether a clean is due.
• Pets: The NCCA suggests pet owners have carpets deep cleaned every 6 to 12 months. That's a trade body's recommendation rather than a tested rule; its reasoning is that pets bring extra dirt into the carpet.
• Colour and construction: The NCCA says light carpets may need cleaning more often to keep their colour, and that long-pile carpets benefit from more regular cleaning. Brintons notes that wool-rich carpets generally hide soiling better than synthetics.
• How it was last cleaned: WoolSafe warns that sticky cleaning residues make carpets re-soil faster. If a carpet looks dirty again soon after a clean, the last clean may be the problem rather than the interval.

We don't use children, smoking or allergies as reasons for a particular interval. Some cleaning companies do, but we didn't find strong evidence behind specific frequencies on those grounds, and a deep clean isn't a health treatment.

If you have pets, our guide on getting pet hair out of carpet covers the vacuuming side. If a carpet still looks dirty soon after being cleaned, see why a carpet can still look dirty after cleaning.

How to work out your own cleaning schedule

1. Find the maker and the current termsLook at the receipt, invoice or guarantee paperwork, then check the maker's current care and guarantee guidance for your range. Terms can change, so don't rely on an old leaflet or someone else's summary.
2. Note any required professional-cleaning intervalIf the guarantee sets one, such as Cormar's at least once every two years, follow that interval. If it sets none, you're working from how the carpet is used and how it looks.
3. Assess traffic and soiling room by roomA hallway, stairs or busy living room can need cleaning much sooner than a spare bedroom. Visible soiling in busy areas is a reason to reassess sooner.
4. Set a vacuuming routine that suits each areaBusier areas need vacuuming more often. Follow the maker's advice on the type of vacuum too — Cormar, for example, warns against beater bars on loop-pile carpet.
5. Plan deep cleans around condition and any guarantee conditionDeep clean busy areas when they look soiled, and the whole carpet at least as often as any guarantee requires. Deal with spills as they happen rather than saving them for the next deep clean.
6. Keep the receipts where they matterIf your guarantee asks for professional cleaning, keep the invoice each time. Cormar, for example, says to keep receipts and invoices to validate any claim.

Wool carpets need extra care

WoolSafe's guidance for wool still ties frequency to soiling rather than a fixed rule, but wool needs more care in how it's cleaned.

The WoolSafe Organisation's guidance says over-wetting greatly lengthens drying time and may discolour the pile, that any wet cleaning should be pre-tested, and that only WoolSafe Approved chemicals should be used on wool and wool-rich carpet. It warns that high alkalinity can cause colour bleeding and, in extreme cases, yellowing and weakening of wool fibres, and that sticky residues make carpets re-soil faster.

Brintons, whose carpets are wool-rich, recommends WoolSafe-Approved operators and chemicals. Cormar says over-soaking wool or wool-blend carpet when cleaning up spills and stains can invalidate its 10 Year guarantee.

If you're not sure whether your carpet is wool or a blend, check the paperwork before anyone wet-cleans it.

Professional cleaning or doing it yourself?

We found nothing to suggest that who does the clean changes how often a carpet needs one, although a clean that leaves residue can make it re-soil faster. What the choice can change is whether a clean meets your guarantee, and how much risk the clean carries.

Where a guarantee asks for professional cleaning — as Cormar's and Abingdon's Stainfree guarantee do — we found nothing to suggest that a clean with your own or a hired machine counts. If that condition matters to you, use a professional and keep the invoice.

Whoever does it, the main risks are the same: over-wetting, unsuitable chemicals and residue left in the pile. The right method also depends on the carpet. Brintons, for example, considers hot water extraction generally the most effective method for overall cleaning, but says rotary dry-foam machines aren't suitable for its carpets.

Choosing between a spot cleaner and a full-size carpet cleaner is a separate question, covered in our carpet cleaner vs spot cleaner comparison.

Related guides

If a carpet smells once it has been cleaned, see why a carpet can smell after cleaning. If it looks no better after a clean, see why a carpet can still look dirty after cleaning. You can also browse the Carpets & Rugs section →