Measuring Retention


Customer retention is important to websites for various reasons. For
instance, research shows that keeping existing customers costs less than
attracting new customers. Studies have shown that the cost for
acquisition on a per-customer basis may be 5 to 10 times that of
customer retention. Research also says there is a 5 to 20 percent chance
of converting a prospect to first-time customer status, and a 20 to 40
percent chance of reacquiring a lost customer. So customer retention is
key.

The metrics and ratios below can help tell you how you rate at customer retention.

  • Number of returning visitors
  • Average frequency of returning visitors
  • Ratio of returning visitors to all visitors
  • Frequency of visit
  • Recency of visit
  • Activity of retained visitors
  • Views of key pages and contents
  • Retained visitor conversion rate
  • Customer retention rate
  • Average frequency of return for retained visitors

While some business models do not expect customers to make a second
purchase right away (e.g., auto, housing, travel), very few websites are
designed for a single visit without return. The KPIs listed below are
those that should be tracked regardless of business model or industry.

  • The ratio of daily to monthly returning visitors — quick measure of the average frequency of return for all visitors.
  • Percent of returning visitors — align new/returning visitor mix with new/retention marketing spend.
  • Loyalty measurements for groups of returning visitors — monitor big changes in visitor loyalty.
  • Retained visitor conversion rate – determine website or campaign success.
  • Customer retention rate – determine website success.


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BHive, 94. Ishwar Nagar, Shambhu Dayal Bagh,
Baghpur, Okhla, New Delhi – 110020,
INDIA