diff --git a/new-lamassu-admin/src/pages/Commissions/helper.js b/new-lamassu-admin/src/pages/Commissions/helper.js
index f7e77bbd..9de4d9b1 100644
--- a/new-lamassu-admin/src/pages/Commissions/helper.js
+++ b/new-lamassu-admin/src/pages/Commissions/helper.js
@@ -235,12 +235,12 @@ const getSchema = locale => {
   return Yup.object().shape({
     cashIn: Yup.number()
       .label('Cash-in')
-      .min(0)
+      .min(-15)
       .max(percentMax)
       .required(),
     cashOut: Yup.number()
       .label('Cash-out')
-      .min(0)
+      .min(-15)
       .max(percentMax)
       .required(),
     fixedFee: Yup.number()