diff --git a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImpl.java b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImpl.java
index d27c9fc46d8..52d183080d8 100644
--- a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImpl.java
+++ b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImpl.java
@@ -247,7 +247,8 @@ public DocumentData getOutputTemplateLocation(String importDocumentId) {
         final ImportTemplateLocationMapper importTemplateLocationMapper = new ImportTemplateLocationMapper();
         final String sql = "select " + importTemplateLocationMapper.schema();
 
-        return this.jdbcTemplate.queryForObject(sql, importTemplateLocationMapper, new Object[] { Integer.parseInt(importDocumentId) }); // NOSONAR
+        // Changed Integer.parseInt to Long.valueOf to support BIGINT and fix Postgres type mismatch
+        return this.jdbcTemplate.queryForObject(sql, importTemplateLocationMapper, new Object[] { Long.valueOf(importDocumentId) }); // NOSONAR
     }
 
     @Override
@@ -255,7 +256,11 @@ public Response getOutputTemplate(String importDocumentId) {
         this.securityContext.authenticatedUser();
         final ImportTemplateLocationMapper importTemplateLocationMapper = new ImportTemplateLocationMapper();
         final String sql = "select " + importTemplateLocationMapper.schema();
-        DocumentData documentData = this.jdbcTemplate.queryForObject(sql, importTemplateLocationMapper, new Object[] { importDocumentId }); // NOSONAR
+
+        // Wrapped importDocumentId in Long.valueOf() to prevent Postgres "bigint = character varying" error
+        DocumentData documentData = this.jdbcTemplate.queryForObject(sql, importTemplateLocationMapper,
+                new Object[] { Long.valueOf(importDocumentId) }); // NOSONAR
+
         return buildResponse(documentData);
     }
 
diff --git a/fineract-provider/src/test/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImplTest.java b/fineract-provider/src/test/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImplTest.java
new file mode 100644
index 00000000000..bd0bd9f7a64
--- /dev/null
+++ b/fineract-provider/src/test/java/org/apache/fineract/infrastructure/bulkimport/service/BulkImportWorkbookServiceImplTest.java
@@ -0,0 +1,74 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.infrastructure.bulkimport.service;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.apache.fineract.infrastructure.documentmanagement.data.DocumentData;
+import org.apache.fineract.infrastructure.security.service.PlatformSecurityContext;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.mockito.junit.jupiter.MockitoSettings;
+import org.mockito.quality.Strictness;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+
+@ExtendWith(MockitoExtension.class)
+@MockitoSettings(strictness = Strictness.LENIENT)
+class BulkImportWorkbookServiceImplTest {
+
+    @Mock
+    private JdbcTemplate jdbcTemplate;
+
+    @Mock
+    private PlatformSecurityContext securityContext;
+
+    @InjectMocks
+    private BulkImportWorkbookServiceImpl bulkImportWorkbookService;
+
+    @Test
+    void getOutputTemplateLocation_ConvertsToLong() {
+        String importId = "456";
+        Long expectedLongId = 456L;
+        DocumentData mockData = new DocumentData(null, null, null, null, "test.xls", null, null, "loc", null, null);
+        when(jdbcTemplate.queryForObject(any(String.class), any(RowMapper.class), any(Object[].class))).thenReturn(mockData);
+
+        bulkImportWorkbookService.getOutputTemplateLocation(importId);
+
+        verify(jdbcTemplate).queryForObject(any(String.class), any(RowMapper.class), eq(new Object[] { expectedLongId }));
+    }
+
+    @Test
+    void getOutputTemplate_ConvertsToLong() {
+        String importId = "123";
+        Long expectedLongId = 123L;
+        DocumentData mockData = new DocumentData(null, null, null, null, "test.xls", null, null, "loc", null, null);
+        when(jdbcTemplate.queryForObject(any(String.class), any(RowMapper.class), any(Object[].class))).thenReturn(mockData);
+
+        bulkImportWorkbookService.getOutputTemplate(importId);
+
+        verify(jdbcTemplate).queryForObject(any(String.class), any(RowMapper.class), eq(new Object[] { expectedLongId }));
+    }
+}