diff --git a/app/models/budget/stats.rb b/app/models/budget/stats.rb
index 766e6ef77..cd9bff741 100644
--- a/app/models/budget/stats.rb
+++ b/app/models/budget/stats.rb
@@ -107,19 +107,19 @@ class Budget::Stats
     end
 
     def authors
-      budget.investments.pluck(:author_id)
+      @authors ||= budget.investments.pluck(:author_id)
     end
 
     def voters
-      supports(budget).distinct.pluck(:voter_id)
+      @voters ||= supports(budget).distinct.pluck(:voter_id)
     end
 
     def balloters
-      budget.ballots.where("ballot_lines_count > ?", 0).distinct.pluck(:user_id).compact
+      @balloters ||= budget.ballots.where("ballot_lines_count > ?", 0).distinct.pluck(:user_id).compact
     end
 
     def poll_ballot_voters
-      budget&.poll ? budget.poll.voters.pluck(:user_id) : []
+      @poll_ballot_voters ||= budget.poll ? budget.poll.voters.pluck(:user_id) : []
     end
 
     def balloters_by_heading(heading_id)
@@ -174,8 +174,6 @@ class Budget::Stats
     end
 
     stats_cache(*stats_methods)
-    stats_cache :total_participants_with_gender
-    stats_cache :voters, :participants, :authors, :balloters, :poll_ballot_voters
 
     def stats_cache(key, &block)
       Rails.cache.fetch("budgets_stats/#{budget.id}/#{phases.join}/#{key}/#{version}", &block)
diff --git a/app/models/concerns/statisticable.rb b/app/models/concerns/statisticable.rb
index 14cb1fa9d..0839f32fa 100644
--- a/app/models/concerns/statisticable.rb
+++ b/app/models/concerns/statisticable.rb
@@ -34,7 +34,7 @@ module Statisticable
     end
 
     def participants
-      User.unscoped.where(id: participant_ids)
+      @participants ||= User.unscoped.where(id: participant_ids)
     end
 
     def total_male_participants
@@ -103,7 +103,7 @@ module Statisticable
       end
 
       def total_participants_with_gender
-        participants.where.not(gender: nil).distinct.count
+        @total_participants_with_gender ||= participants.where.not(gender: nil).distinct.count
       end
 
       def age_groups
diff --git a/app/models/poll/stats.rb b/app/models/poll/stats.rb
index a6be63640..ea075e6c9 100644
--- a/app/models/poll/stats.rb
+++ b/app/models/poll/stats.rb
@@ -96,15 +96,14 @@ class Poll::Stats
     end
 
     def voters
-      poll.voters
+      @voters ||= poll.voters
     end
 
     def recounts
-      poll.recounts
+      @recounts ||= poll.recounts
     end
 
     stats_cache(*stats_methods)
-    stats_cache :participants, :voters, :recounts
 
     def stats_cache(key, &block)
       Rails.cache.fetch("polls_stats/#{poll.id}/#{key}/#{version}", &block)