80% say NEGATIVE online information changed their mind about purchasing a service

Most business owners know how to calculate fixed costs like rent and equipment and variable costs such as wages, utilities, materials, etc.. related to providing goods and services. But there is another kind of cost to consider. Lost opportunity costs. These are harder to measure but certainly, are real. One example of lost opportunity is if a potential patient comes to your site and looks around but for whatever reason leaves. If your company has a bad online reputation or no reputation, a percentage of potential buyers will shy away and seek another vendor.

Recent research shows that on average a bad review on a site like Yelp scares away an average of 30 potential customers. For anyone with a fairly large ticket item – a Dentist or an Emergency Restoration company a single bad review can potentially cost a hundred thousand dollars or more over the lifetime of a customer.

By using our lost opportunity calculator you can calculate what the real costs are including the lifetime value of a customer and the referrals that are potentially lost.


Enter your amounts in fields 1, 2, 3, 4, 5, 6 and 7 (all are required).

1 Amount of Average Sale How much is spent on one sale?

2 Number of Sales per Year: How many times does he/she buy per year?

3 Number of Years a Customer: How may years will a customer keep buying?

4 Additional Customer Referrals per Year: How many additional clients will he/she refer per year?

5 % of Referrals Becoming Customers: What percent of referrals become customers (enter 50% as 50)?

6 Number of Negative Online Reviews Annually: How many negative reviews do you have?

7 Number of Lost Customers per Review: How may customers lost per negative review? Businesses risk losing up to 22% of their potential new customers with just one negative review.


Fields 8, 9, 10, 11 and 12 are dynamically calculated from the input section above.
8 Gross Sales per Year per Customer:


9 Total Lifetime Value of a Lost Customer:


10 Lost Revenue (Yearly Customer Value):


11 Lost Revenue (Monthly Customer Value):


12 Lost Revenue (Lifetime Customer Value):


  • 75% of people don’t believe that companies tell the truth in advertisements.
  • 86% of consumers are influenced by negative reviews.
  • Businesses risk losing as many as 22% of their customers with just one negative review.
  • 2009 Convergys Corp. Study: A single Negative Online Review can Cost the Average Business an Average Loss of 30 Customers
  • 2011 Cone Online Influence Report: 80% say NEGATIVE online information changed their mind about purchasing a product or service
  • How Many Customers Could One Bad Review Cost Your Business?