diff --git a/app/models/cost.rb b/app/models/cost.rb
index b2369c3..79ef5ee 100644
--- a/app/models/cost.rb
+++ b/app/models/cost.rb
@@ -56,10 +56,23 @@ class Cost
   
   def easy_energy_rate(formatted_hour)
     year = Date.parse(formatted_hour).year
+    month = Date.parse(formatted_hour).month
+
     case year
-    when 2020..2022
+    when 2020..2021
       # opslag, zonder BTW
       0.00800
+    when 2022
+      case month
+      when 1..11
+        # opslag, before increase
+        0.00800
+      when 12
+        # opslag, met BTW: 0,01962
+        0.018 
+      end
+    when 2023
+      0.018
     end  
   end