You check your profile out of habit and the number has changed. 4.7 yesterday, 4.5 today. You scroll the reviews looking for the culprit and... there isn't one. Nothing new. Nothing bad.

Here are the seven things that cause this, starting with the ones people never think of.

1. Good reviews were deleted

This is the invisible one, and it's the most common explanation for a drop with no new negative review.

When Google removes an account it deems inauthentic, every review that account ever left disappears — including the genuine five-star it left for you three years ago. Your total count falls, your average recalculates, and nothing on your profile tells you it happened.

How to spot it: compare your review count to what you remember. If the total went down rather than up, reviews were removed. Full detail on why in why Google reviews disappear.

There is nothing you can do to reverse this, and it hits businesses that once ran review campaigns hardest.

2. You have too few reviews for stability

On a small base, one review moves the number a lot. At a 4.8 average with 15 reviews, a single 2-star drops you to roughly 4.6. At 150 reviews, the same review moves you by about two hundredths.

If your rating swings visibly every few weeks, that's not a quality problem — it's a volume problem. The arithmetic and the thresholds are in how many Google reviews you need.

3. Rounding

Google displays one decimal place. A true average of 4.649 shows as 4.6; 4.651 shows as 4.7. So a tiny change can appear to move your rating by a full tenth when almost nothing actually happened.

If your rating dropped by exactly 0.1 and you can't find a cause, this is very often it. It isn't worth worrying about.

4. Something in the business genuinely changed

The uncomfortable one. Ratings rarely fall for no reason over a sustained period. Look at what changed 4-8 weeks before the decline started:

A key member of staff left
You got busier and service slowed
A supplier changed
You raised prices without changing the experience — see responding to price complaints
You reduced opening hours or staffing on certain shifts
A refurbishment, a move, or a new booking system

Read the last twenty reviews in one sitting rather than one at a time. Patterns are invisible day to day and obvious in a batch.

5. A burst of negative reviews from one incident

One bad night, one system failure, one poorly handled event can generate several negative reviews within a week. It feels like a collapse but it's a spike, and it flattens out if you respond well and keep collecting reviews afterwards.

6. Fake or malicious reviews

Less common than owners assume, but it does happen — a competitor, a former employee, someone with a grudge. The tell is several vague negative reviews in a short window from accounts with no history.

Report them properly rather than replying angrily. The process is in how to remove a fake Google review and, if you suspect the source, in what to do when a competitor buys fake reviews.

7. Your listing was merged or changed

If duplicate listings were merged, or you changed address, name or category, your review set can change — sometimes gaining reviews, sometimes losing them. Any recent edit to your Business Profile is worth checking against the date the rating moved.

How to diagnose yours in ten minutes

Check the total count, not just the average. Count down = reviews removed. Count up = new reviews caused it.
Sort by newest and read everything from the last two months in one go.
Find the date the drop started and look at what changed in the business 4-8 weeks earlier.
Work out the size of the move. A 0.1 drop is often rounding. A 0.4 drop is a real event.
Check for duplicate listings once, properly.

What actually pulls it back up

Not removal requests. Volume and consistency.

The maths is unforgiving but simple: to move an average, you need new reviews above your current average, and you need more of them the bigger your existing base is. A business at 4.3 with 60 reviews needs roughly 30-40 new five-star reviews to reach 4.6. That's six months of asking properly, not a weekend project.

The full recovery arithmetic is in how to recover from a bad Google rating. The short version: fix whatever the reviews are actually telling you, then ask every single customer, every week, without incentives, for as long as it takes.

A rating you can't explain is usually volume. A rating that keeps falling is usually the business. Be honest with yourself about which one you've got.

Reploi tracks your rating over time and flags when the sentiment in new reviews starts shifting — so you see a decline forming instead of finding out after it lands. Start free — 5 replies/month →

Why Did My Google Rating Drop? (7 Causes, Including One Nobody Expects)