diff --git a/write_logfile.py b/write_logfile.py
new file mode 100755
index 0000000..9994a27
--- /dev/null
+++ b/write_logfile.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import sys
+import db
+from helpers import *
+
+# Writes a log of all transactions to a text file.
+#
+# Usage:
+# ./write_logfile.py filename
+# or (writing to stdout):
+# ./write_logfile.py
+
+def write_log(f):
+    session = Session()
+    line_format = '%s|%s|%s|%s|%s|%s\n'
+    transaction_list = session.query(Transaction).all()
+    for transaction in transaction_list:
+        if transaction.purchase:
+            products = ', '.join(map(lambda ent: ent.product.name,
+                                     transaction.purchase.entries))
+            description = ''
+        else:
+            products = ''
+            description = transaction.description
+        line = line_format % ('purchase', transaction.time, products,
+                              transaction.user.name, transaction.amount, transaction.description)
+        f.write(line.encode('utf8'))
+    session.close()
+
+if len(sys.argv) < 2:
+    write_log(sys.stdout)
+else:
+    filename = sys.argv[1]
+    print 'Writing log to ' + filename
+    with open(filename, 'w') as f:
+        write_log(f)