diff --git a/backend/migrations/005_add_completion_logs.py b/backend/migrations/005_add_completion_logs.py
new file mode 100644
index 0000000..c35d1d0
--- /dev/null
+++ b/backend/migrations/005_add_completion_logs.py
@@ -0,0 +1,79 @@
+"""Add chore_completion_logs table for comprehensive chore tracking."""
+import sqlite3
+import sys
+from pathlib import Path
+
+# Add parent directory to path to import from app
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+def upgrade():
+    """Create chore_completion_logs table."""
+    db_path = Path(__file__).parent.parent / "data" / "family_hub.db"
+    
+    print(f"Connecting to database: {db_path}")
+    conn = sqlite3.connect(db_path)
+    cursor = conn.cursor()
+    
+    try:
+        # Check if table already exists
+        cursor.execute("""
+            SELECT name FROM sqlite_master 
+            WHERE type='table' AND name='chore_completion_logs'
+        """)
+        
+        if cursor.fetchone():
+            print("⚠️  Table chore_completion_logs already exists, skipping...")
+            return
+        
+        # Create chore_completion_logs table
+        print("Creating chore_completion_logs table...")
+        cursor.execute("""
+            CREATE TABLE chore_completion_logs (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                chore_id INTEGER NOT NULL,
+                user_id INTEGER NOT NULL,
+                completed_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                notes TEXT,
+                verified_by_user_id INTEGER,
+                created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (chore_id) REFERENCES chores(id) ON DELETE CASCADE,
+                FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
+                FOREIGN KEY (verified_by_user_id) REFERENCES users(id) ON DELETE SET NULL
+            )
+        """)
+        
+        # Create indexes for better query performance
+        print("Creating indexes...")
+        cursor.execute("""
+            CREATE INDEX idx_completion_logs_chore_id 
+            ON chore_completion_logs(chore_id)
+        """)
+        
+        cursor.execute("""
+            CREATE INDEX idx_completion_logs_user_id 
+            ON chore_completion_logs(user_id)
+        """)
+        
+        cursor.execute("""
+            CREATE INDEX idx_completion_logs_completed_at 
+            ON chore_completion_logs(completed_at)
+        """)
+        
+        conn.commit()
+        print("✅ Successfully created chore_completion_logs table")
+        print("   Features:")
+        print("   - Tracks every chore completion instance")
+        print("   - Optional notes for each completion")
+        print("   - Optional verification by another user")
+        print("   - Full historical data for reporting")
+        
+    except Exception as e:
+        print(f"❌ Error during migration: {e}")
+        conn.rollback()
+        raise
+    finally:
+        conn.close()
+
+if __name__ == "__main__":
+    upgrade()
+    print("\n✅ Migration completed!")