Purchase Intervals
Know When Customers Will Buy Again
Track purchase intervals to understand how long it typically takes customers to make a repeat purchase. Use this insight to convert more first-time buyers into repeat customers.

- Average Purchase Interval
- The typical number of days between a customer’s first and second purchase. Use this to understand expected repeat purchase timing.
- Best Retargeting Window
- The optimal timeframe to re-engage customers before they are most likely to buy again. Time your campaigns perfectly.
- Time to 80% of Repeats
- The number of days by which 80% of repeat customers have made a second purchase. Identify when most repeat purchases occur.
Count of Repeat Orders
Purchase Timing Patterns
Track when customers are most likely to make their second purchase. See how many second purchases occur within each time interval (e.g., 0–7, 8–15, 16–30 days) and the cumulative percentage to identify the optimal retargeting window.

Key Insights
Turn expected purchase timing into repeat revenue
- Optimize Marketing Timing
Reach customers at the moment they’re most likely to buy again and launch campaigns when intent is highest to maximize conversions.
- Identify At-Risk Customers
Spot customers who haven’t returned within expected purchase intervals and proactively re-engage them before churn risk increases.
- Improve Repeat Purchase Rate
Refine your lifecycle strategies and increase the share of customers who return for a second purchase.
Frequently Asked Questions
What are purchase intervals?
Purchase intervals measure the time between a customer's first and second purchase. This data helps you optimize marketing to convert new customers into repeat buyers by understanding when customers typically return.
How do you calculate purchase intervals?
Purchase intervals analyze the time between the first and second purchases of repeat customers whose first purchase falls within the selected products and time period. The second purchase can be any given ASIN or time period.
What is the best retargeting window?
The best retargeting window is the optimal timeframe to engage customers with marketing efforts to encourage a second purchase. This is calculated based on when most customers return to make their second purchase.
What does 'time to 80% of repeats' mean?
This metric shows the number of days by which 80% of repeat customers have made their second purchase. It helps you understand the timeframe within which most repeat purchases occur.
How can I use purchase interval data?
Use purchase intervals to time your marketing campaigns perfectly, identify at-risk customers who haven't returned when expected, optimize inventory levels, and improve your overall repeat purchase rate.
Start tracking purchase intervals today
Optimize your marketing timing and convert more new customers into repeat buyers.