diff --git a/README.md b/README.md
index b1cf0b9..b7e753e 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,18 @@ Installation
 3. Schedule some crontabs to run the updatecorps and updatepayments management commands
 
 
+Configuration
+-------------
+
+These options are defined in the "Settings" model.
+
+pac.tax_threshold - The minimum per-month tax value (default 200,000,000)
+pac.tax_rate - The value at which PACs are taxed at after the threshold (default 10)
+
+payments.keyid - Key ID of the API Key for the payments wallet
+payments.vcode - vCode for the API Key for the payments wallet
+payments.last_id - Last RefID processed, only adjust this if you really really need to.
+payments.corpname - Name of the corp which holds the payments wallet
+
+