diff --git a/app/controllers/finance/financial_transactions_controller.rb b/app/controllers/finance/financial_transactions_controller.rb
index 8b9d372d..930acebe 100644
--- a/app/controllers/finance/financial_transactions_controller.rb
+++ b/app/controllers/finance/financial_transactions_controller.rb
@@ -89,7 +89,7 @@ class Finance::FinancialTransactionsController < ApplicationController
       params[:financial_transactions].each do |trans|
         # ignore empty amount fields ...
         unless trans[:amount].blank?
-          amount = trans[:amount].to_f
+          amount = LocalizeInput.parse(trans[:amount]).to_f
           note = params[:note]
           ordergroup = Ordergroup.find(trans[:ordergroup_id])
           if params[:set_balance]
diff --git a/app/models/concerns/localize_input.rb b/app/models/concerns/localize_input.rb
index 8198d7b2..cfb44a44 100644
--- a/app/models/concerns/localize_input.rb
+++ b/app/models/concerns/localize_input.rb
@@ -1,23 +1,25 @@
 module LocalizeInput
   extend ActiveSupport::Concern
 
+  def self.parse(input)
+    return input unless input.is_a? String
+
+    Rails.logger.debug { "Input: #{input.inspect}" }
+    separator = I18n.t("separator", scope: "number.format")
+    delimiter = I18n.t("delimiter", scope: "number.format")
+    input.gsub!(delimiter, "") if input.match(/\d+#{Regexp.escape(delimiter)}+\d+#{Regexp.escape(separator)}+\d+/) # Remove delimiter
+    input.gsub!(separator, ".") # Replace separator with db compatible character
+    input
+  rescue
+    Rails.logger.warn "Can't localize input: #{input}"
+    input
+  end
+
   class_methods do
     def localize_input_of(*attr_names)
       attr_names.flatten.each do |attr|
         define_method "#{attr}=" do |input|
-          begin
-            if input.is_a? String
-              Rails.logger.debug "Input: #{input.inspect}"
-              separator = I18n.t("separator", :scope => "number.format")
-              delimiter = I18n.t("delimiter", :scope => "number.format")
-              input.gsub!(delimiter, "") if input.match(/\d+#{Regexp.escape(delimiter)}+\d+#{Regexp.escape(separator)}+\d+/) # Remove delimiter
-              input.gsub!(separator, ".") # Replace separator with db compatible character
-            end
-            self[attr] = input
-          rescue
-            Rails.logger.warn "Can't localize input: #{input}"
-            self[attr] = input
-          end
+          self[attr] = LocalizeInput.parse(input)
         end
       end
     end