diff --git a/app/templates/views/pricing/how-to-pay.html b/app/templates/views/pricing/how-to-pay.html
index 803a390aa..5b39e2a5a 100644
--- a/app/templates/views/pricing/how-to-pay.html
+++ b/app/templates/views/pricing/how-to-pay.html
@@ -47,11 +47,11 @@
     </p>
 
     <p>
-      You must update the PO if the estimated annual usage costs increase.
+      You must update the <abbr title="purchase order">PO</abbr> if the estimated annual usage costs increase.
     </p>
 
     <p>
-      You may need to set up the Cabinet Office as a supplier before you can raise a PO.
+      You may need to set up the Cabinet Office as a supplier before you can raise a <abbr title="purchase order">PO</abbr>.
     </p>
 
     <p>