diff --git a/lib/plausible_web/email.ex b/lib/plausible_web/email.ex
index f1468a767..44244dc13 100644
--- a/lib/plausible_web/email.ex
+++ b/lib/plausible_web/email.ex
@@ -113,11 +113,23 @@ defmodule PlausibleWeb.Email do
   end
 
   def over_limit_email(user, usage, last_cycle) do
+    yearly_plan_ids =
+      Plausible.Billing.Plans.plans()
+      |> Map.fetch!(:yearly)
+      |> Enum.map(fn {_limit, plan} -> plan[:product_id] end)
+
+    subject_pre =
+      if user.subscription.paddle_plan_id in yearly_plan_ids do
+        "[YEARLY] "
+      else
+        ""
+      end
+
     base_email()
     # Temporary testing
     |> to(["uku@plausible.io"])
     |> tag("over-limit")
-    |> subject("You have outgrown your Plausible subscription tier ")
+    |> subject("#{subject_pre}You have outgrown your Plausible subscription tier ")
     |> render("over_limit.html", %{
       user: user,
       usage: usage,