diff --git a/src/app/portfolio/[slug]/components/InputFile.tsx b/src/app/portfolio/[slug]/components/InputFile.tsx
index 60b0dad7..70c7487a 100644
--- a/src/app/portfolio/[slug]/components/InputFile.tsx
+++ b/src/app/portfolio/[slug]/components/InputFile.tsx
@@ -6,10 +6,12 @@ export function InputFile({
   onFileSelect,
   isValidating,
   isValid,
+  errorMessage,
 }: {
   onFileSelect: (file: File) => void;
   isValidating: boolean;
   isValid: boolean | null;
+  errorMessage: string | null;
 }) {
   function handleOnChange(e: React.ChangeEvent<HTMLInputElement>) {
     const file = e.target.files?.[0];
@@ -18,14 +20,11 @@ export function InputFile({
     const validExtensions = ["csv", "xls", "xlsx"];
     const fileExtension = file.name.split(".").pop()?.toLowerCase();
 
-    console.log("Extension: ", fileExtension);
-
     if (!fileExtension || !validExtensions.includes(fileExtension)) {
       console.error("Unsupported file type");
       e.target.value = "";
       return;
     }
-    console.log("TRIGGER");
 
     onFileSelect(file);
   }
@@ -46,9 +45,7 @@ export function InputFile({
       )}
 
       {isValid === false && !isValidating && (
-        <span className="text-sm text-red-500 mt-1">
-          File validation failed
-        </span>
+        <span className="text-sm text-red-500 mt-1">{errorMessage}</span>
       )}
     </div>
   );
diff --git a/src/app/portfolio/[slug]/components/UploadCsvModal.tsx b/src/app/portfolio/[slug]/components/UploadCsvModal.tsx
index f2093121..b5093ff8 100644
--- a/src/app/portfolio/[slug]/components/UploadCsvModal.tsx
+++ b/src/app/portfolio/[slug]/components/UploadCsvModal.tsx
@@ -168,12 +168,13 @@ export async function validateClientFile(file: File): Promise<{
       sheetRowCounts[sheetName] = rowCount;
     }
 
-    console.log("Sheet Counts", sheetRowCounts);
-
     if (!isStandardised) {
+      // Explain why the file is not standardised
+
       return {
         isValid: false,
-        error: "Excel file is not a valid domna asset list.",
+        error:
+          "Excel file is not a valid domna asset list - either no 'Standardised Asset List' tab or no domna property ID reference.",
         file_type: "xlsx",
         sheetNames,
         sheetRowCounts,
@@ -369,6 +370,7 @@ export default function UploadCsvModal({
   const [isValidating, setIsValidating] = useState(false);
   const [fileIsValid, setFileIsValid] = useState<boolean | null>(null);
   const [sheetCounts, setSheetCounts] = useState<Record<string, number>>({});
+  const [errorMessage, setErrorMessage] = useState<string | null>(null);
 
   const scenarioOptions = useMemo(
     () =>
@@ -482,6 +484,10 @@ export default function UploadCsvModal({
 
                         if (!result.isValid) {
                           setFileIsValid(false);
+                          // Set validation message
+                          setErrorMessage(
+                            result.error || "File validation failed"
+                          );
                           setCsvFile(null);
                           setSheetNames([]);
                           setSelectedSheet("");
@@ -504,6 +510,7 @@ export default function UploadCsvModal({
                       }}
                       isValidating={isValidating}
                       isValid={fileIsValid}
+                      errorMessage={errorMessage}
                     />
 
                     <a