diff --git a/.env.example b/.env.example
index 39e1ea96..8c4e0231 100644
--- a/.env.example
+++ b/.env.example
@@ -158,7 +158,15 @@ LNBITS_EXTENSIONS_DEFAULT_INSTALL="tpos"
 LNBITS_DATA_FOLDER="./data"
 # LNBITS_DATABASE_URL="postgres://user:password@host:port/databasename"
 
-LNBITS_SERVICE_FEE="0.0"
+# the service fee (in percent)
+LNBITS_SERVICE_FEE=0.0
+# the wallet where fees go to
+# LNBITS_SERVICE_FEE_WALLET=
+# the maximum fee per transaction (in satoshis)
+# LNBITS_SERVICE_FEE_MAX=1000
+# disable fees for internal transactions
+# LNBITS_SERVICE_FEE_IGNORE_INTERNAL=true
+
 # value in millisats
 LNBITS_RESERVE_FEE_MIN=2000
 # value in percent