diff --git a/index.md b/index.md
index 912a7fd..c832487 100644
--- a/index.md
+++ b/index.md
@@ -61,6 +61,7 @@ tools/upgrading-drutopia-platform-elizabeth-sites
 tools/uptime-monitoring
 tools/inspecting-logs
 templates/drupal-module-project
+tools/bookkeeping-with-gnucash
 ```
 
 ```{toctree}
diff --git a/tools/bookkeeping-with-gnucash.md b/tools/bookkeeping-with-gnucash.md
new file mode 100644
index 0000000..ea048a7
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+++ b/tools/bookkeeping-with-gnucash.md
@@ -0,0 +1,15 @@
+# Bookkeeping with GnuCash
+
+## Initial setup
+
+In **GnuCash Preferences** (reached via Edit » Preferences), select the **General** vertical tab (these are alphabetical), and under **Files**, uncheck "Compress files".
+
+```{alert}
+Turning off file compression is crucial because we commit our GnuCash file to Git for collaboration.
+```
+
+Also in **GnuCash Preferences**, select the **Register Defaults** vertical tab, and under **Default Style** at the top select "Auto-split ledger".
+
+```{note}
+This keeps the listing tight but allows quick recatogorization of expenses.
+```