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Retention rate is the percentage of customers who continue to buy from your store — or remain active subscribers — over a defined period. It is the direct inverse of churn rate and measures how well your brand holds on to customers it has already acquired. High retention means your acquisition spend compounds over time; low retention means you are perpetually refilling a leaky bucket.
Customer Retention Rate = ((Customers at End of Period − New Customers Acquired) ÷ Customers at Start of Period) × 100
Example: Start of month = 1,000 customers. You acquired 150 new customers. End of month = 1,100 customers. Retention Rate = ((1,100 − 150) ÷ 1,000) × 100 = 95%
Alternatively: Retention Rate = 100% − Churn Rate
If monthly churn is 7%, retention rate is 93%.
Acquiring a new customer in India's competitive D2C market costs ₹300-₹800 on average across paid channels. Retaining an existing customer costs a fraction of that. A brand with 80% annual retention retains most of its revenue base without additional ad spend; a brand with 50% annual retention needs to replace half its revenue every year just to stay flat. Research consistently shows that increasing retention rate by even 5% can increase profits by 25-95%, because retained customers buy more frequently, require less convincing, and are more likely to refer others.
Nykaa's loyalty program — Nykaa Prive — is fundamentally a retention mechanism. By offering tiered rewards (points, early sale access, birthday gifts), Nykaa gives customers a reason to return to Nykaa.com rather than switching to Myntra or Amazon for their next beauty purchase. Cohort data from loyalty programs like this typically shows that loyalty members have 2-3× higher annual retention rates and 40-60% higher average order values than non-members. The investment in the program pays for itself many times over in retained acquisition spend.
Test the impact of post-purchase email sequences on 30, 60, and 90-day retention. Compare a control group receiving only transactional emails against a treatment receiving a curated onboarding sequence. Measure repeat purchase rate and overall 90-day revenue per customer to quantify the retention lift.
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