How Often Should You Clean Your Carpets? Straight Answer from a 20-Year IICRC Pro
Every carpet cleaning company in San Antonio will tell you to book a professional clean every six months. That number is a marketing frequency, not a technical one. I've spent twenty-plus years in San Antonio homes running crews to the IICRC S100 standard, and the real answer is different — it depends on your household, your fiber, and honestly what your last cleaner did or didn't do. Here's the frequency I actually recommend after twenty years of carpet cleaning in San Antonio — first as a lead technician, then as owner of AST Cleaning & Restoration since 2011.
The industry answer, and why it's incomplete
"Every six months" is the number most local ads and mailers push, and it sells cleaning subscriptions. It isn't grounded in the actual professional standard for carpet cleaning maintenance. If a homeowner runs a healthy household — light foot traffic, no pets, HEPA vacuuming weekly — six months is over-cleaning, and over-cleaning is a real thing. If a homeowner runs a heavy household — three kids, two dogs, allergies in the family — six months is way too little, and by month five the fiber is already saturated with the kind of residue that damages carpet permanently. One number can't cover both.
The IICRC S100 recommendation, translated
The IICRC S100 is the Standard for Professional Cleaning of Textile Floor Coverings. It's the industry's own document — the one every legitimate carpet cleaner is trained against. The S100 sets a baseline of every 12 to 18 months for a typical residential household, with the cadence tightening based on soil load, occupancy, and fiber type. It's not a marketing frequency. It's the technical baseline the manufacturer warranties on most residential carpet reference as well. Read the fine print on a Stainmaster or Shaw warranty and you'll see the same range — cleaning receipts every 12 to 18 months to keep the warranty active.
That "receipts every 12 to 18 months" language is not a suggestion. Warranty claims get denied over gaps that only show up when you go to file one. I've watched homeowners lose out on manufacturer replacements because they either DIY-cleaned or skipped years entirely, and there's no professional record to point at.
The real frequency by household type
Here's how I actually break it down for the homeowners who call the shop.
Baseline residential. One or two adults, no pets, mostly hard-floor living space with carpet in the bedrooms. Annual professional clean. Every 12 months lands you right in the middle of the S100 baseline and preserves the warranty. Between cleans, HEPA vacuum weekly.
Household with pets. One or more dogs or cats, especially indoors most of the day. Every 6 to 9 months. Pet dander binds to fiber differently than dust — it's oily, it holds allergens, and no vacuum lifts it out. If you have carpet in living areas where pets sleep, ride the 6-month cadence. If pets are limited to a bedroom or kennel area, 9 months is fine.
Household with kids under 5. Toddlers crawl. Toddlers eat on carpet. Toddlers have accidents on carpet. Every 6 to 9 months, same as pets. Add a spot-treatment plan between visits — I'd rather come out for a targeted spot job than have you soak the pad with a rental machine and cause wicking.
Household with allergies. Every 6 to 9 months plus quarterly HEPA vacuuming with a bagged machine, not canister. Dust mite waste is the biggest indoor allergen most homeowners never think about, and it lives in the carpet fiber. A professional hot water extraction pass to IICRC S100 is the only reliable removal.
High-traffic entry-carpet. Front hall, mudroom, top of stairs. The traffic lanes soil three to four times faster than adjacent bedroom carpet. If the rest of your home is on a 12-month cadence, add a 6-month traffic-lane touchup for these areas specifically. That's often a $150 add-on rather than a full-house clean.
Signs your carpet needs it before the schedule says so
I get calls in Alamo Heights, Stone Oak, and Boerne all the time from homeowners who booked a clean because "it just felt time" — and they were right. Trust these signs over the calendar.
Any two of those and you're overdue. Call before it becomes damage instead of dirt.
Why over-cleaning is a real thing
Here's the part cleaning companies pushing six-month subscriptions won't tell you. Professional-grade cleaning uses alkaline pre-conditioners, agitation, and truck-mount extraction pressure. Done correctly, that's exactly what your carpet wants at the right cadence. Done too often, the fiber never gets a chance to re-set. You accelerate crushing in the traffic lanes, you shorten the effective lifespan of the pad underneath, and you spend more money in the process. If a company is pushing quarterly cleans on a household that doesn't need them, they're selling revenue, not carpet care.
What I actually recommend
Line up your household against the categories above, pick the cadence that fits, and stick to it. If you're a baseline residential home, annual. Add pets, kids, or allergies, drop to 6–9 months. High-traffic zones can go on a separate touchup schedule instead of a full-home extra clean. If you're on any of the modern nylon or Stainmaster warranties, keep your receipts. When you're ready to book, call the shop at (210) 599-9726 — Laura and the team will walk you through what your specific home needs before we quote anything.