diff --git a/app/controllers/admin/registrars_controller.rb b/app/controllers/admin/registrars_controller.rb
index 17a618273..b925a8156 100644
--- a/app/controllers/admin/registrars_controller.rb
+++ b/app/controllers/admin/registrars_controller.rb
@@ -3,6 +3,7 @@ module Admin
     load_and_authorize_resource
     before_action :set_registrar, only: [:show, :edit, :update, :destroy]
     helper_method :registry_vat_rate
+    helper_method :iban_max_length
 
     def index
       @q = Registrar.joins(:accounts).ordered.search(params[:q])
@@ -80,5 +81,9 @@ module Admin
     def registry_vat_rate
       Registry.current.vat_rate
     end
+
+    def iban_max_length
+      Iban.max_length
+    end
   end
 end
diff --git a/app/models/iban.rb b/app/models/iban.rb
new file mode 100644
index 000000000..260aca827
--- /dev/null
+++ b/app/models/iban.rb
@@ -0,0 +1,5 @@
+class Iban
+  def self.max_length
+    34
+  end
+end
\ No newline at end of file
diff --git a/app/views/admin/registrars/form/_billing.html.erb b/app/views/admin/registrars/form/_billing.html.erb
index fa1583ca8..8d1375f64 100644
--- a/app/views/admin/registrars/form/_billing.html.erb
+++ b/app/views/admin/registrars/form/_billing.html.erb
@@ -73,7 +73,7 @@
                         <%= f.label :iban %>
                     </div>
                     <div class="col-md-7">
-                        <%= f.text_field :iban, class: 'form-control' %>
+                        <%= f.text_field :iban, maxlength: iban_max_length, class: 'form-control' %>
                     </div>
                 </div>
             </div>
diff --git a/test/models/iban_test.rb b/test/models/iban_test.rb
new file mode 100644
index 000000000..8455c4e86
--- /dev/null
+++ b/test/models/iban_test.rb
@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class IbanTest < ActiveSupport::TestCase
+  def test_returns_max_length
+    assert_equal 34, Iban.max_length
+  end
+end
\ No newline at end of file