Competitor Review Calculator: How Long to Overtake Their Rating

Works for Google reviews and Airbnb. Every other review calculator aims at a number that stays still. Your competitor does not stay still. They are collecting reviews while you are.

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Pick your platform, then put in both ratings, both review counts and roughly how many 5-star reviews each of you collects a month. You get the exact point where you pass them, or an honest answer that at these rates you do not.

Why the target is a rival, not a threshold

Airbnb hosts have it easy in one narrow sense. There is a line at 4.8, a badge on the other side of it, and four fixed dates a year when Airbnb checks. You can work out precisely where you stand because there is somewhere to stand.

A local business on Google has none of that. There is no threshold, no badge and no assessment date. A 4.3 is not failing anything. So "how close am I to the line" is the wrong question, and it is why rating tools built for Airbnb hosts feel hollow to a restaurant or a dentist.

The question a local business actually asks is about the place down the road. That target moves, which makes the arithmetic more interesting than it first looks.

Three things that surprise people

Their review count matters as much as their rating

An average moves less the more reviews it already contains. A business with 30 reviews shifts roughly ten times further per new review than one with 300. So a competitor sitting on hundreds of reviews is a slow target even when the gap looks small, and a competitor with a handful is a fast one, in both directions.

This is also why a smaller business can overtake a larger one without ever getting better reviews on any given day. It is simply climbing faster.

"Never" is the normal answer, not a bug

Both averages climb towards 5.0. If your competitor is collecting reviews at a similar rate to you, a small gap between you never closes. Not slowly. Never.

Look at the last row. A gap of five hundredths between two businesses of almost identical size, both collecting reviews steadily, is permanent. The only thing that closes it is out-pacing them.

Pace beats position

Your rating and review count set where you start. The rate at which each of you collects new reviews decides whether the gap closes at all. A business that asks every satisfied customer for a review will overtake a better-rated rival that does not, given enough time, and no amount of existing advantage prevents that.

Running an Airbnb listing instead?

Switch the calculator above to Airbnb and it works to two decimal places against a rival listing. The arithmetic is identical; only the precision changes.

Airbnb hosts have something a local business does not, though: an actual threshold. The 4.8 Superhost line and its quarterly assessment are handled by the Airbnb rating calculator, and the rating benchmark shows how your margin compares to every listing in your market. Chasing a specific rival is usually the second question for a host, and the first one for a local business.

What this does not tell you

Frequently asked questions

How many reviews do I need to beat a competitor's rating?

It depends on four numbers, not two: both ratings and both review counts. A competitor with many reviews has an average that barely moves, so catching them is slow even when the gap looks small. A competitor with few reviews is a much easier target, and also a much less stable one. The calculator on this page solves the exact figure, including the months it takes at your current pace.

Why does my competitor's review count matter so much?

Because an average moves less the more reviews it already contains. A business with 30 reviews shifts its average roughly ten times faster per new review than one with 300. That is why a smaller business can overtake a larger one without ever receiving better reviews on any given day. It is simply climbing faster.

Can you ever fail to catch a competitor?

Yes, and it is the most common result between two similar businesses. Both averages climb towards 5.0, and if your competitor is gaining reviews at a similar or faster rate than you are, the gap never closes. The honest answer in that case is never rather than a large number of months, and the useful follow-up is what monthly pace would change it.

Is a higher rating or more reviews more important?

For catching a competitor, pace matters more than either. Your rating and review count set the starting position, but the rate at which each of you collects new 5-star reviews decides whether the gap closes at all. A business that asks every customer for a review will overtake a better-rated rival that does not, given enough time.

Does Google rank businesses by star rating?

Not directly, and not by rating alone. Google's local results weigh relevance, distance and prominence, and reviews feed prominence through both their number and their average. A slightly lower rating with many more reviews often outperforms a perfect rating with very few, which is why chasing the decimal point in isolation is usually the wrong focus.

The maths, for anyone who wants it

With your star total A over n1 reviews gaining g a month, and theirs B over n2 gaining h, you pass them when (A+5gt)/(n1+gt) reaches (B+5ht)/(n2+ht). Cross-multiply and the t² terms cancel exactly, which leaves something pleasingly simple: the race is linear in time, and a single division gives the answer.

When that division would need a negative denominator, no amount of time is enough, which is the "never" result. The calculator then solves the other way round for the pace that would make the denominator positive.