diff --git a/src/components/BookingBreakdown/LineItemBookingPeriod.js b/src/components/BookingBreakdown/LineItemBookingPeriod.js
index 1ac49d83..bf424ec4 100644
--- a/src/components/BookingBreakdown/LineItemBookingPeriod.js
+++ b/src/components/BookingBreakdown/LineItemBookingPeriod.js
@@ -52,6 +52,10 @@ const LineItemBookingPeriod = props => {
     item => item.code === unitType && !item.reversal
   );
 
+  if (!unitPurchase) {
+    throw new Error(`LineItemBookingPeriod: lineItem (${unitType}) missing`);
+  }
+
   const useQuantityForDayCount = isNightly || isDaily;
   const count = useQuantityForDayCount ? unitPurchase.quantity.toFixed() : dayCount;
 
diff --git a/src/components/BookingBreakdown/LineItemSubTotalMaybe.js b/src/components/BookingBreakdown/LineItemSubTotalMaybe.js
index 284e2650..4dc24e8c 100644
--- a/src/components/BookingBreakdown/LineItemSubTotalMaybe.js
+++ b/src/components/BookingBreakdown/LineItemSubTotalMaybe.js
@@ -43,6 +43,11 @@ const LineItemSubTotalMaybe = props => {
   const unitPurchase = transaction.attributes.lineItems.find(
     item => item.code === unitType && !item.reversal
   );
+
+  if (!unitPurchase) {
+    throw new Error(`LineItemSubTotalMaybe: lineItem (${unitType}) missing`);
+  }
+
   const formattedSubTotal = formatMoney(intl, unitPurchase.lineTotal);
 
   return showSubTotal ? (
diff --git a/src/components/BookingBreakdown/LineItemUnitPrice.js b/src/components/BookingBreakdown/LineItemUnitPrice.js
index be5abfd1..6d521bf9 100644
--- a/src/components/BookingBreakdown/LineItemUnitPrice.js
+++ b/src/components/BookingBreakdown/LineItemUnitPrice.js
@@ -16,6 +16,11 @@ const LineItemUnitPrice = props => {
   const unitPurchase = transaction.attributes.lineItems.find(
     item => item.code === unitType && !item.reversal
   );
+
+  if (!unitPurchase) {
+    throw new Error(`LineItemUnitPrice: lineItem (${unitType}) missing`);
+  }
+
   const formattedUnitPrice = formatMoney(intl, unitPurchase.unitPrice);
 
   return (
diff --git a/src/components/BookingBreakdown/LineItemUnitsMaybe.js b/src/components/BookingBreakdown/LineItemUnitsMaybe.js
index db6fdc01..a46118c2 100644
--- a/src/components/BookingBreakdown/LineItemUnitsMaybe.js
+++ b/src/components/BookingBreakdown/LineItemUnitsMaybe.js
@@ -14,6 +14,11 @@ const LineItemUnitsMaybe = props => {
   const unitPurchase = transaction.attributes.lineItems.find(
     item => item.code === unitType && !item.reversal
   );
+
+  if (!unitPurchase) {
+    throw new Error(`LineItemUnitsMaybe: lineItem (${unitType}) missing`);
+  }
+
   const quantity = unitPurchase.quantity;
 
   return (