diff --git a/pinaxcon/settings.py b/pinaxcon/settings.py
index 9811345eb40a8c72bdedf7585082292cd53187c2..6352f523ab07a70cfec52d919fb0c0d109bdb8f1 100644
--- a/pinaxcon/settings.py
+++ b/pinaxcon/settings.py
@@ -1,6 +1,7 @@
 import os
 import dj_database_url
 
+from decimal import Decimal
 
 PROJECT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
 PACKAGE_ROOT = os.path.abspath(os.path.dirname(__file__))
@@ -315,6 +316,13 @@ TICKET_PRODUCT_CATEGORY = 1
 
 INVOICE_CURRENCY = "USD"
 
+# VAT rate is 21%
+# When PINAX_VAT_RATE is set, this percentage of the invoice total is
+# displayed as a line item as the amount of VAT paid.
+INVOICE_VAT_RATE = Decimal(os.environ.get('PINAX_VAT_RATE') or 0)
+if INVOICE_VAT_RATE > 1:
+    INVOICE_VAT_RATE /= 100
+
 MARKDOWN_DEUX_STYLES = {
     "default": {
         "safe_mode": False,