diff --git a/app/assets/javascripts/webchat.js.erb b/app/assets/javascripts/webchat.js.erb
index 3df3a07a5..132f07c9d 100644
--- a/app/assets/javascripts/webchat.js.erb
+++ b/app/assets/javascripts/webchat.js.erb
@@ -51,6 +51,7 @@
         if (message.evt === 'opened') {
           webchat.$banner.addClass('open');
           webchat.$banner.attr('aria-hidden', false);
+          GOVUK.analytics.trackEvent('webchat', 'offered');
         } else if (message.evt === 'closed') {
           webchat.$banner.removeClass('open');
           webchat.$banner.attr('aria-hidden', true);