Every WooCommerce store can see how many times a coupon was used and how much discount was given. What none of the built in reports tell you is
whether the coupon actually caused the sale.

Coupon ROI Tracker answers the one question that matters:

Did SAVE10 bring in new customers, or did I just hand money back to people who were already going to buy?

How it works

When an order is completed, the plugin checks whether this is the customer’s first ever order. First-time buyers are attributed to the
coupon the discount they received is the acquisition cost. Repeat buyers who used a coupon are flagged as “wasteful spend” because they
would likely have purchased at full price.

What you get

True ROI % per coupon (new customer revenue vs total discount cost)
New customer acquisition rate per coupon
Wasteful discount amount (money spent on repeat buyers)
Plain-English verdict: Profitable / Break Even / Wasteful
Date-range filtering
CSV export for spreadsheet analysis

Coupon ROI Tracker for WooCommerce