diff --git a/app/controllers/admin/payments_controller.rb b/app/controllers/admin/payments_controller.rb
index b3fc6fbff..7df4cb47b 100644
--- a/app/controllers/admin/payments_controller.rb
+++ b/app/controllers/admin/payments_controller.rb
@@ -134,12 +134,11 @@ def create_invoice(csv, payments, payment_type, start_date, end_date = nil)
         # now create every transaction row with the following date: Blank, ledger account,
         # transaction description, VAT number, amount, cost_location ()
         a = Activity.find_by(id: activity_id)
-        csv << if a && a.name == "Lidmaatschap"
-                 # Dislike this way of doing it but need better ways to find membership activities
-                 # An alternative could be activity_id == Settings['intro.membership'],
-                 # this would make it only pass for last year membership activity
+        csv << if a && (a.name == "Lidmaatschap" || a.id == Settings['intro.membership'])
+                 # Check on the name to allow previous years to be exported.
+
                  ["", "8000", "#{ p.activity.name } - #{ p.member_id }", '0',
-                  p.currency + payment.transaction_fee, ""]
+                  p.currency + p.transaction_fee, ""]
                elsif p.activity.group.nil? ||
                      (!p.activity.group.nil? && p.activity.group.ledgernr.blank?)
                  ["", "1302", "#{ p.activity.name } - #{ p.member_id }", p.activity.VAT,
@@ -156,8 +155,13 @@ def create_invoice(csv, payments, payment_type, start_date, end_date = nil)
       csv << ["", Settings.mongoose_ledger_number, "Mongoose - #{ payment.member_id }", "9",
               payment.amount - Settings.mongoose_ideal_costs, ""]
     end
+    # minus lidmaatschap payments
+    activity_amount = payments.where(transaction_type: :activity).count - payments.where(
+      transaction_type: :activity,
+      transaction_id: Settings['intro.membership']
+    ).count
+    # TODO: should probably be backwards compatible but we don't log all membership activities
 
-    activity_amount = payments.where(transaction_type: :activity).count
     mongoose_amount = payments.where(transaction_type: :checkout).count
     trx_cost = "Transaction costs #{ Settings.mongoose_ideal_costs } x #{ activity_amount }"
     trx_cost_amount = (Settings.mongoose_ideal_costs * activity_amount).round(2)
@@ -166,6 +170,11 @@ def create_invoice(csv, payments, payment_type, start_date, end_date = nil)
 
     csv << ["", Settings.accountancy_ledger_number, trx_cost, "21",
             trx_cost_amount, Settings.accountancy_cost_location]
+
+    # As of December 2023, mongoose has been decoupled from Koala
+    # Exports after that don't really have to include the mongoose costs or TRX costs
+    return unless trx_mongoose_amount != 0
+
     csv << ["", Settings.accountancy_ledger_number, trx_mongoose_cost, "21",
             trx_mongoose_amount, Settings.accountancy_cost_location]
   end
diff --git a/app/controllers/public/home_controller.rb b/app/controllers/public/home_controller.rb
index eba07fca0..79d05f5a7 100644
--- a/app/controllers/public/home_controller.rb
+++ b/app/controllers/public/home_controller.rb
@@ -52,14 +52,13 @@ def create
 
       transaction = Payment.new(
         description: I18n.t("form.introduction", user: @member.name),
-        amount: total,
+        amount: total - Settings.mongoose_ideal_costs, # Transaction costs are paid by the association
         issuer: params[:bank],
         member: @member,
 
         transaction_id: activities.map(&:id),
         transaction_type: :activity,
         payment_type: :ideal,
-
         redirect_uri: public_url
       )