diff --git a/lib/customer_plan.rb b/lib/customer_plan.rb
index c349a546bfb572ee808ef36a427874bb7032f485..f4716a3bbd27e24c25501ab59740e5f7a58ce84f 100644
--- a/lib/customer_plan.rb
+++ b/lib/customer_plan.rb
@@ -71,9 +71,12 @@ class CustomerPlan
 
 	def bill_plan(note: nil)
 		EM.promise_fiber do
-			DB.transaction do
+			DB.transaction do |db|
+				next false unless !block_given? || yield(db)
+
 				charge_for_plan(note)
 				add_one_month_to_current_plan unless activate_plan_starting_now
+				true
 			end
 		end
 	end