How many 5-star reviews does it take to offset a 1-star review?
At the average US med spa rating of 4.87 stars, it takes 30 five-star reviews to win back the average lost to one 1-star review. The higher your rating, the more it takes: 19 for the average dental practice (4.79★), 10 for dermatology (4.62★). Based on Google data for 9,452 US practices, September 2026.
- Rule of thumb: five-star reviews needed = (your rating − 1) ÷ (5 − your rating).
- At 4.87★ (the med spa average) that is 30; at 4.89★ (physical therapy) it is 36.
- Review count decides how far one 1-star drags you: at 20 reviews a med spa average drops to 4.69★; at the median 148 reviews it barely moves.
- The median med spa adds about 5.83 reviews a month, so recovery takes months, not days.
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One formula, and why high ratings make it harder
A 1-star review costs you (rating − 1) points of "average" spread across your profile. Each 5-star review gives back (5 − rating). So the number of 5-star reviews needed to return to where you were is:
5-star reviews needed = (your rating − 1) ÷ (5 − your rating), rounded up.
The formula does not depend on how many reviews you have. It depends only on your rating, and it climbs steeply as the rating approaches 5. At 4.0 stars you need 3 five-star reviews. At 4.5 you need 7. At 4.8 you need 19. That is the trap of a near-perfect profile: there is very little room above you, so each 5-star review recovers very little.
That matters because US healthcare ratings are already high. Across the 9,452 practices in our benchmarks, specialty averages run from 4.62 to 4.89 stars. In the med spa review gap study, the average med spa sits at 4.87.
Five-star reviews needed to offset one 1-star, at each specialty's average
Rating = national average Google rating for the specialty, 9,452 US practices, September 2026. Five-star reviews needed = ⌈(rating − 1) ÷ (5 − rating)⌉.
Physical therapy clinics and med spas, the two highest-rated groups, need the most. Dermatology, with the lowest average at 4.62, needs the fewest, because there is more headroom above it. None of this means a dermatologist should worry less about a bad review; a lower starting rating has its own cost when patients compare profiles side by side.
Review count decides how far one 1-star review drags you
The number of 5-star reviews you need to recover does not change with review count, but the size of the drop does. A practice with 20 reviews feels a 1-star review immediately. A practice with several hundred barely registers it.
| Specialty | Average rating | Median reviews | After one 1-star at the median | After one 1-star at 20 reviews | Under 50 reviews |
|---|---|---|---|---|---|
| Physical Therapy | 4.89 | 122 | 4.86 | 4.7 | 22% |
| Med Spa | 4.87 | 148 | 4.84 | 4.69 | 15.9% |
| IV Therapy & Wellness | 4.81 | 52 | 4.74 | 4.63 | 48.4% |
| Dental | 4.79 | 319.5 | 4.78 | 4.61 | 9.1% |
| Medical Weight Loss | 4.79 | 42 | 4.7 | 4.61 | 53.8% |
| Chiropractic | 4.77 | 125 | 4.74 | 4.59 | 27% |
| Cosmetic & Plastic Surgery | 4.74 | 107 | 4.71 | 4.56 | 29.9% |
| Hair Restoration | 4.74 | 33 | 4.63 | 4.56 | 58.3% |
| Dermatology | 4.62 | 125 | 4.59 | 4.45 | 31.1% |
New average = (reviews × rating + 1) ÷ (reviews + 1). Median reviews and the share under 50 are national figures for each specialty (n shown in the chart above).
Two things stand out. First, a med spa at the median 148 reviews drops only from 4.87 to 4.84, while one with 20 reviews drops to 4.69. Second, thin profiles are common in some specialties: 58.3% of hair restoration clinics and 53.8% of medical weight loss clinics have fewer than 50 reviews, so a single complaint moves their average far more than it would for a typical dental practice.
How long recovery takes at a normal review pace
In our med spa review subsample, the median spa gains about 5.83 new Google reviews a month. Even if every one of them were five stars, offsetting a single 1-star review at a 4.87 average would take roughly 6 months. Real profiles collect some 4-star reviews too, which stretches that further. That is why practices with a slow, irregular review flow feel stuck after one bad week.
The practical lesson: you cannot out-run a bad review with a short burst. You recover with a steady, ethical request process that runs every week, and with a calm reply that shows the next reader how you handle problems. Owners reply to 61% of reviews on average, and 34.8% of med spas reply to fewer than half.
What this means for your practice
- Work out your own number. Plug your current rating into the formula. If it is above 4.8, every 1-star review needs roughly 20 or more five-star reviews to undo.
- Grow review depth first if you are under 50. Depth is what protects you; a larger base makes each bad review smaller.
- Ask every patient, the same way. Selective asking (only happy patients) and incentives tied to a positive rating are banned under the FTC's 2024 reviews rule.
- Reply to the 1-star review, briefly and safely. Never confirm the reviewer is a patient or discuss their care; invite them to call.
- Fix the cause. In our med spa data, booking and communication is the theme where complaints outnumber praise. See the review gap report for where the gaps are.
Underlying study: The Med Spa Review Gap (2026).
How we know: source, sample, date and limits
Source: average ratings and review counts from our 2026 Google benchmarks (9,452 practices, 9 specialties, 20 US metros, public Google Business Profile data collected September 2026), summarized in The Med Spa Review Gap and the healthcare Google benchmarks. Review pace from a 115-spa review subsample (reviews dated in the last six months ÷ 6).
- The offset figure is arithmetic on the average, not a prediction of how Google ranks or displays your profile.
- It assumes every new review is five stars, which real profiles rarely achieve, so treat it as a minimum.
- Specialty averages are national; your own rating is the number that matters.
Want this benchmarked for your practice?
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Related research and services
The med spa review gap (2026)
Review pace, reply rates and review depth for 555 med spas.
Responding to negative reviews under HIPAA
What you can and cannot say in a reply.
How to get more Google reviews, compliantly
Building the request into the visit.
Healthcare reputation management
Review programs and reply handling.
Google Business Profile management
Keeping the profile and replies current.
Med spa marketing
How we market US med spas.
Common questions
How many 5-star reviews does it take to offset one 1-star review?
It depends on your current rating. To return to your previous average you need (rating − 1) ÷ (5 − rating) five-star reviews, rounded up. At 4.87 stars, the average US med spa rating in our study, that is 30. At 4.79, the dental average, it is 19. At 4.5 stars it is 7.
Does one bad review hurt a practice with few reviews more?
Yes. With 20 reviews at a 4.87 average, one 1-star review pulls the average to 4.69. With the median med spa's 148 reviews, the same review moves it to 4.84. 15.9% of US med spas and 58.3% of hair restoration clinics have fewer than 50 reviews.
Can a practice get a 1-star review removed?
Only if it breaks Google's review policies, for example spam, off-topic content or a conflict of interest. A review you simply disagree with will usually stay up. A calm, private-channel reply and a steady flow of new reviews are the reliable fixes.
Can we offer patients something in exchange for 5-star reviews?
No. The FTC's 2024 rule on consumer reviews bans incentives conditioned on a review expressing a particular sentiment, and Google's policies prohibit incentivized reviews. Ask every patient the same way and accept the rating they choose to give.
Where does the average rating data come from?
From our 2026 Google benchmarks: public Google Business Profile data for 9,452 practices in 9 specialties and 20 US metros, collected in September 2026. Review pace comes from our med spa review gap study.
A note on this article: it reports aggregate research and explains marketing practice. It is not legal advice, and cost figures are planning estimates, not guarantees of results.
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