diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33c367e39..d0322400d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # Changelog Fab Manager
 
+- Ability to configure and export the accounting data to the ACD accounting software
 - Fix a bug: no user can be created after the last member was deleted
 - Fix a bug: unable to generate a refund (Avoir)
 - Fix a bug: a newly generated refund is displayed as broken (unchained record) even if it is correctly chained
@@ -9,6 +10,7 @@
 - Fix some security issues: updated sidekiq to 5.2.7 to fix XSS and CRSF issues
 - Removed dependency to jQuery UI
 - Updated angular-xeditable, to remove dependency to jquery 1.11.1
+- [TODO DEPLOY] `rake db:migrate`
 
 ## v4.0.2 2019 July 10
 
diff --git a/app/controllers/api/accounting_exports_controller.rb b/app/controllers/api/accounting_exports_controller.rb
new file mode 100644
index 000000000..9efa1a321
--- /dev/null
+++ b/app/controllers/api/accounting_exports_controller.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# API Controller for exporting accounting data to external accounting softwares
+class API::AccountingExportsController < API::ApiController
+
+  before_action :authenticate_user!
+
+  def export
+    authorize :export
+
+    export = Export.where(category: 'accounting', export_type: 'accounting-software')
+                   .where('created_at > ?', Invoice.maximum('updated_at'))
+                   .last
+    if export.nil? || !FileTest.exist?(export.file)
+      @export = Export.new(
+        category: 'accounting',
+        export_type: 'accounting-software',
+        user: current_user,
+        extension: params[:extension],
+        query: params[:query],
+        key: params[:separator]
+      )
+      if @export.save
+        render json: { export_id: @export.id }, status: :ok
+      else
+        render json: @export.errors, status: :unprocessable_entity
+      end
+    else
+      send_file File.join(Rails.root, export.file),
+                type: 'text/csv',
+                disposition: 'attachment'
+    end
+  end
+end
diff --git a/app/controllers/api/exports_controller.rb b/app/controllers/api/exports_controller.rb
index a785562e9..e02a6e7b4 100644
--- a/app/controllers/api/exports_controller.rb
+++ b/app/controllers/api/exports_controller.rb
@@ -8,10 +8,17 @@ class API::ExportsController < API::ApiController
 
   def download
     authorize @export
+    mime_type = if @export.extension == 'xlsx'
+                  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
+                elsif @export.extension == 'csv'
+                  'text/csv'
+                else
+                  'application/octet-stream'
+                end
 
     if FileTest.exist?(@export.file)
       send_file File.join(Rails.root, @export.file),
-                type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+                type: mime_type,
                 disposition: 'attachment'
     else
       render text: I18n.t('errors.messages.export_not_found'), status: :not_found
@@ -21,28 +28,8 @@ class API::ExportsController < API::ApiController
   def status
     authorize Export
 
-    export = Export.where(category: params[:category], export_type: params[:type], query: params[:query], key: params[:key])
-
-    if params[:category] == 'users'
-      case params[:type]
-      when 'subscriptions'
-        export = export.where('created_at > ?', Subscription.maximum('updated_at'))
-      when 'reservations'
-        export = export.where('created_at > ?', Reservation.maximum('updated_at'))
-      when 'members'
-        export = export.where('created_at > ?', User.with_role(:member).maximum('updated_at'))
-      else
-        raise ArgumentError, "Unknown export users/#{params[:type]}"
-      end
-    elsif params[:category] == 'availabilities'
-      case params[:type]
-      when 'index'
-        export = export.where('created_at > ?', [Availability.maximum('updated_at'), Reservation.maximum('updated_at')].max)
-      else
-        raise ArgumentError, "Unknown type availabilities/#{params[:type]}"
-      end
-    end
-    export = export.last
+    exports = Export.where(category: params[:category], export_type: params[:type], query: params[:query], key: params[:key])
+    export = retrieve_last_export(exports, params[:category], params[:type])
 
     if export.nil? || !FileTest.exist?(export.file)
       render json: { exists: false, id: nil }, status: :ok
@@ -53,6 +40,39 @@ class API::ExportsController < API::ApiController
 
   private
 
+  def retrieve_last_export(export, category, type)
+    case category
+    when 'users'
+      case type
+      when 'subscriptions'
+        export = export.where('created_at > ?', Subscription.maximum('updated_at'))
+      when 'reservations'
+        export = export.where('created_at > ?', Reservation.maximum('updated_at'))
+      when 'members'
+        export = export.where('created_at > ?', User.with_role(:member).maximum('updated_at'))
+      else
+        raise ArgumentError, "Unknown export users/#{type}"
+      end
+    when 'availabilities'
+      case type
+      when 'index'
+        export = export.where('created_at > ?', [Availability.maximum('updated_at'), Reservation.maximum('updated_at')].max)
+      else
+        raise ArgumentError, "Unknown type availabilities/#{type}"
+      end
+    when 'accounting'
+      case type
+      when 'accounting-software'
+        export = export.where('created_at > ?', Invoice.maximum('updated_at'))
+      else
+        raise ArgumentError, "Unknown type accounting/#{type}"
+      end
+    else
+      raise ArgumentError, "Unknown category #{category}"
+    end
+    export.last
+  end
+
   def set_export
     @export = Export.find(params[:id])
   end
diff --git a/app/models/export.rb b/app/models/export.rb
index 32ab8ed68..74056d3a9 100644
--- a/app/models/export.rb
+++ b/app/models/export.rb
@@ -21,7 +21,7 @@ class Export < ActiveRecord::Base
   end
 
   def filename
-    "#{export_type}-#{id}_#{created_at.strftime('%d%m%Y')}.xlsx"
+    "#{export_type}-#{id}_#{created_at.strftime('%d%m%Y')}.#{extension}"
   end
 
   private
@@ -34,6 +34,8 @@ class Export < ActiveRecord::Base
       UsersExportWorker.perform_async(id)
     when 'availabilities'
       AvailabilitiesExportWorker.perform_async(id)
+    when 'accounting'
+      AccountingExportWorker.perform_async(id)
     else
       raise NoMethodError, "Unknown export service for #{category}/#{export_type}"
     end
diff --git a/app/policies/accounting_exports_policy.rb b/app/policies/accounting_exports_policy.rb
new file mode 100644
index 000000000..378dbc2c7
--- /dev/null
+++ b/app/policies/accounting_exports_policy.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+# Check the access policies for API::AccountingExportsController
+class AccountingExportsPolicy < ApplicationPolicy
+  def export?
+    user.admin?
+  end
+end
diff --git a/app/workers/accounting_export_worker.rb b/app/workers/accounting_export_worker.rb
new file mode 100644
index 000000000..306698398
--- /dev/null
+++ b/app/workers/accounting_export_worker.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# Asynchronously export the accounting data (Invoices & Avoirs) to an external accounting software
+class AccountingExportWorker
+  include Sidekiq::Worker
+
+  def perform(export_id)
+    export = Export.find(export_id)
+
+    raise SecurityError, 'Not allowed to export' unless export.user.admin?
+
+    data = JSON.parse(export.query)
+    service = AccountingExportService.new(export.file, data['columns'], data['encoding'], export.extension, export.key)
+
+    service.export(data['start_date'], data['end_date'])
+
+    NotificationCenter.call type: :notify_admin_export_complete,
+                            receiver: export.user,
+                            attached_object: export
+  end
+end
diff --git a/config/routes.rb b/config/routes.rb
index e036624e5..2193dd9cc 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -135,6 +135,8 @@ Rails.application.routes.draw do
       get 'last_closing_end', on: :collection
       get 'archive', action: 'download_archive', on: :member
     end
+    # export accounting data to csv or equivalent
+    post 'accounting/export' => 'accounting_exports#export'
 
     # i18n
     # regex allows using dots in URL for 'state'
diff --git a/db/migrate/20190730085826_add_extension_to_export.rb b/db/migrate/20190730085826_add_extension_to_export.rb
new file mode 100644
index 000000000..40e15a140
--- /dev/null
+++ b/db/migrate/20190730085826_add_extension_to_export.rb
@@ -0,0 +1,5 @@
+class AddExtensionToExport < ActiveRecord::Migration
+  def change
+    add_column :exports, :extension, :string, default: 'xlsx'
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index f1baff8ba..227076c17 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,12 +11,12 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20190606074801) do
+ActiveRecord::Schema.define(version: 20190730085826) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
-  enable_extension "unaccent"
   enable_extension "pg_trgm"
+  enable_extension "unaccent"
 
   create_table "abuses", force: :cascade do |t|
     t.integer  "signaled_id"
@@ -202,10 +202,11 @@ ActiveRecord::Schema.define(version: 20190606074801) do
     t.string   "category"
     t.string   "export_type"
     t.string   "query"
-    t.datetime "created_at",  null: false
-    t.datetime "updated_at",  null: false
+    t.datetime "created_at",                   null: false
+    t.datetime "updated_at",                   null: false
     t.integer  "user_id"
     t.string   "key"
+    t.string   "extension",   default: "xlsx"
   end
 
   add_index "exports", ["user_id"], name: "index_exports_on_user_id", using: :btree