diff --git a/FY2013/make-month-dat.py b/FY2013/make-month-dat.py
new file mode 100755
index 0000000..1cf19b7
--- /dev/null
+++ b/FY2013/make-month-dat.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python2
+"""Make a dat file for a month, given a directory containing input CSVs.
+"""
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+import csv
+import sys
+from os import path
+
+if len(sys.argv) != 2:
+    raise SystemExit("usage: {} ../path/to/csv/root".format(sys.argv[0]))
+
+csv_root = sys.argv[1]
+csv_root = path.realpath(csv_root)
+
+fy_root = path.realpath(path.dirname(__file__))
+
+
+class TransactionBase(dict):
+    def __init__(self, raw):
+        dict.__init__(self)
+        self._raw = raw
+        self.update(raw)
+        self.update(self.process(raw))
+
+    def process(self, raw):
+        processed = {}
+        processed['Date'] = '{2:>04}-{0:>02}-{1:>02}'.format(*raw['Date'].split('/'))
+        processed['Payee']
+        return processed
+
+
+EXPENSE = """
+{Date}  {Payee}
+    {Expense Account:63}$     0.08
+    {Asset Account:63}-$     0.08
+{Date}  Balance Sheet
+    {Liability Account:63}$     0.08
+    {Expense Account:63}-$     0.08"""
+
+PAYDAY = """
+{Date}  Settlement
+    Assets:Escrow:New Alliance                                      $    20.67
+    Assets:Fee Buffer:New Alliance                                  $     0.30
+    Assets:Fee Buffer:Stripe                                       -$     0.30
+    Assets:Escrow:Stripe                                           -$    20.67"""
+
+SETTLEMENT = """
+{Date}  Settlement
+    Assets:Escrow:New Alliance                                      $    20.67
+    Assets:Fee Buffer:New Alliance                                  $     0.30
+    Assets:Fee Buffer:Stripe                                       -$     0.30
+    Assets:Escrow:Stripe                                           -$    20.67"""
+
+
+new_alliance = csv.DictReader(open(path.join(csv_root, 'new-alliance.csv')))
+
+for row in new_alliance:
+    template = None
+
+    row['Date'] = '{2:>04}-{0:>02}-{1:>02}'.format(*row['Date'].split('/'))
+    row['Amount'] = row['Amount'].replace('$', '')
+    row['Account'] = ''
+
+    blob = row['Description']
+    if blob.startswith('EFT'):
+        kind, payee = blob.split(' - ')
+
+        if payee.startswith('MERCHANT BANKCD '):
+            payee = 'Samurai'
+        elif payee.startswith('AMERICAN EXPRESS '):
+            payee = 'Samurai'
+        elif payee.startswith('STRIPE '):
+            payee = 'Stripe'
+
+        row['Payee'] = payee
+
+        if kind == 'EFT W/D':
+            template = EXPENSE
+            row['Expense Account'] = 'Expenses:Fee Buffer:' + payee
+            row['Asset Account'] = 'Assets:Fee Buffer:New Alliance'
+            row['Liability Account'] = 'Liabilities:Fee Buffer:'
+
+
+    if template is None:
+        print(row, file=sys.stderr)
+    else:
+        print(template.format(**row))